US20100262189A1 - Flexible rod manufacturing apparatus and method for a spinal fixation and the flexible rod manufactured through the same - Google Patents
Flexible rod manufacturing apparatus and method for a spinal fixation and the flexible rod manufactured through the sameDownload PDFInfo
- Publication number
- US20100262189A1 US20100262189A1US12/823,657US82365710AUS2010262189A1US 20100262189 A1US20100262189 A1US 20100262189A1US 82365710 AUS82365710 AUS 82365710AUS 2010262189 A1US2010262189 A1US 2010262189A1
- Authority
- US
- United States
- Prior art keywords
- axis
- pedicle
- rod
- straight
- driving
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
- 238000000034methodMethods0.000titleclaimsabstractdescription20
- 238000004519manufacturing processMethods0.000titleabstractdescription7
- 239000000463materialSubstances0.000claimsabstractdescription76
- 230000008569processEffects0.000claimsdescription5
- 238000007599dischargingMethods0.000claimsdescription4
- 238000000465mouldingMethods0.000abstractdescription5
- 241000282414Homo sapiensSpecies0.000description5
- 206010058907Spinal deformityDiseases0.000description5
- 238000010438heat treatmentMethods0.000description5
- 229910001000nickel titaniumInorganic materials0.000description5
- 229910045601alloyInorganic materials0.000description4
- 239000000956alloySubstances0.000description4
- 239000002184metalSubstances0.000description4
- 229910052751metalInorganic materials0.000description4
- 229910001285shape-memory alloyInorganic materials0.000description4
- 230000000694effectsEffects0.000description3
- HLXZNVUGXRDIFK-UHFFFAOYSA-Nnickel titaniumChemical compound[Ti].[Ti].[Ti].[Ti].[Ti].[Ti].[Ti].[Ti].[Ti].[Ti].[Ti].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni]HLXZNVUGXRDIFK-UHFFFAOYSA-N0.000description3
- RTAQQCXQSZGOHL-UHFFFAOYSA-NTitaniumChemical compound[Ti]RTAQQCXQSZGOHL-UHFFFAOYSA-N0.000description2
- 230000003412degenerative effectEffects0.000description2
- 201000010099diseaseDiseases0.000description2
- 208000037265diseases, disorders, signs and symptomsDiseases0.000description2
- 230000004927fusionEffects0.000description2
- KHYBPSFKEHXSLX-UHFFFAOYSA-NiminotitaniumChemical compound[Ti]=NKHYBPSFKEHXSLX-UHFFFAOYSA-N0.000description2
- 238000001356surgical procedureMethods0.000description2
- 239000010936titaniumSubstances0.000description2
- 229910052719titaniumInorganic materials0.000description2
- 238000004804windingMethods0.000description2
- 208000008035Back PainDiseases0.000description1
- 208000031481Pathologic ConstrictionDiseases0.000description1
- 201000006490SpondylolysisDiseases0.000description1
- 208000028752abnormal postureDiseases0.000description1
- 238000010521absorption reactionMethods0.000description1
- 238000007792additionMethods0.000description1
- 210000000988bone and boneAnatomy0.000description1
- 230000008859changeEffects0.000description1
- 238000001816coolingMethods0.000description1
- 239000007943implantSubstances0.000description1
- 238000012986modificationMethods0.000description1
- 230000004048modificationEffects0.000description1
- 210000005036nerveAnatomy0.000description1
- 230000008520organizationEffects0.000description1
- 208000005198spinal stenosisDiseases0.000description1
- 230000036262stenosisEffects0.000description1
- 208000037804stenosisDiseases0.000description1
- 238000006467substitution reactionMethods0.000description1
- 210000001519tissueAnatomy0.000description1
Images
Classifications
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods
- A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
- A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws or setting implements
- A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
- A61B17/70—Spinal positioners or stabilisers, e.g. stabilisers comprising fluid filler in an implant
- A61B17/7001—Screws or hooks combined with longitudinal elements which do not contact vertebrae
- A61B17/7002—Longitudinal elements, e.g. rods
- A61B17/7011—Longitudinal element being non-straight, e.g. curved, angled or branched
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods
- A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
- A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws or setting implements
- A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
- A61B17/70—Spinal positioners or stabilisers, e.g. stabilisers comprising fluid filler in an implant
- A61B17/7001—Screws or hooks combined with longitudinal elements which do not contact vertebrae
- A61B17/7002—Longitudinal elements, e.g. rods
- A61B17/7019—Longitudinal elements having flexible parts, or parts connected together, such that after implantation the elements can move relative to each other
- A61B17/7026—Longitudinal elements having flexible parts, or parts connected together, such that after implantation the elements can move relative to each other with a part that is flexible due to its form
- A61B17/7028—Longitudinal elements having flexible parts, or parts connected together, such that after implantation the elements can move relative to each other with a part that is flexible due to its form the flexible part being a coil spring
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods
- A61B2017/00831—Material properties
- A61B2017/00867—Material properties shape memory effect
Definitions
- the present inventionrelates to a rod capable of securely connecting pedicle screws in a pedicle screw system for correcting a damaged or transformed spine and a method and an apparatus for fabricating the same and, more particularly, to a flexible pedicle rod with superelasticity in order to provide flexibility to a fixation between spine segments and a method and an apparatus capable of fabricating the same in mass production.
- a spinal fusion treatmentis carried out in spinal stenosis, spondylolisdthesis and spondylolysis accompanying instability between spinal segments.
- a conventional pedicle fixing apparatusincludes a plurality of pedicle screws 200 which are respectively inserted, as a supporting member, through the pedicle into injured or deformed vertebra, wherein each of the pedicle screws 200 has a head 201 with a U-shaped rod passage 201 a; rods 250 for making a correction of the pedicle through an interconnection between the pedicle screws 200 ; set screws 300 to be inserted into the rod passage 201 a for fixing the rods 250 ; and a transverse link 400 for holding a pair of the rods 250 .
- the rodplays an important role in the fixation of the deformed vertebra. Therefore, the quality of the material, elasticity, and so on, of the rod has a significant influence on the human body.
- the applicant of the present inventionintroduced a rod for the pedicle fixation using a shape memory alloy such as a Ni—Ti alloy (Nitinol) which is harmless in the human body with high congeniality and has the property similar to the human tissue in superelasticity and absorption nature.
- a shape memory alloysuch as a Ni—Ti alloy (Nitinol) which is harmless in the human body with high congeniality and has the property similar to the human tissue in superelasticity and absorption nature.
- the various rodshave been introduced in Korean patent application Nos. 2004-76105, 2004-76106, 2004-97833 and 2004-97834.
- a rod ( 600 ) described in the cited referenceshas a body 602 and an elastic member 604 , which has a coil type formed in the middle of the body 602 , to provide the flexibility to the rod 600 .
- This flexible rodhas a length of approximately 80 to 100 mm (typically, 82 mm) and a small standard diameter of approximately 3 to 6 mm. Since the material of the rod itself is to have the hard metal organization and the rod is to be manufactured in a coil type with the shape memory through a heating process, it is very difficult to form the elastic member of the coil type in the middle of the rod.
- the rod having the coil sectionis manually made due to the drawback to the manufacture of the rod; however, it is very difficult to make the rod uniform and it is impossible to realize the mass production and commercialization.
- the elastic member having a large volumecauses a surgical inconvenience in the procedure of securing the rod within the pedicle screw because the body described in the cited references is positioned at the central axis of the elastic member and then the pedicle can be in contact with the elastic member. In this case, there is a problem in that an inevitable operation procedure which has to dig a space out of the spine is required.
- Embodiments of the present inventionare directed to providing an apparatus for fabricating a flexible rod of a pedicle screw system in mass production, wherein the fixation between spinal segments is improved after the surgical correction of spinal deformity and superelasticity is provided for a part of the flexible rod in order that an elastic power is induced when an external force is applied to the spine.
- embodiments of the present inventionare directed to providing a rod of a pedicle screw system, which has no interference from a elastic section of the rod in the surgical correction of spinal deformity, by providing eccentricity between a rod body and the elastic section.
- an apparatus for fabricating a flexible pedicle rod for pedicle fixationcomprising a body; an X- and Y-axis moving element mounted on a top surface of the body, the X- and Y-axis moving element simultaneously moving in X-axis and Y-axis directions to wind a material at an angle of 90 degrees; a magazine mounted on the X- and Y-axis moving element to load a material; a material withdrawing element for withdrawing materials one by one from the magazine; and a material molding element mounted on the X- and Y-axis moving element, the material molding element gripping both ends of the material withdrawn from the material withdrawing element and rotating to mold a portion of the material in a spring shape.
- a method for fabricating a flexible pedicle rod for pedicle fixationcomprising a first step of initializing; a second step of driving a feeder driving motor to move a feeder straight in the initialization state, thereby withdrawing a material from a magazine; a third step of gripping one end of the material moving straight by the feeder at the die; a fourth step of driving an Y-axis servo motor built in a body to move an Y-axis stage straight, thereby fixing the other end of the material to a groove shaft of a fixing base; a fifth step of driving a high-frequency heater to heat the material at a predetermined temperature; a sixth step of respectively driving Y-axis and X-axis servo motors in Y-axis and X-axis directions to wind the material fixed to the die and the groove shaft at 90 degrees; a seventh step of driving the X-axis servomotor to move an X-axis stage in the
- a flexible pedicle rodprepared by a process comprising a first step of initializing; a second step of driving a feeder driving motor to move a feeder straight in the initialization state, thereby withdrawing a material from a magazine; a third step of gripping one end of the material moving straight by the feeder at the die; a fourth step of driving an Y-axis servo motor built in a body to move an Y-axis stage straight, thereby fixing the other end of the material to a groove shaft of a fixing base; a fifth step of driving a high-frequency heater to heat the material at a predetermined temperature; a sixth step of respectively driving Y-axis and X-axis servo motors in Y-axis and X-axis directions to wind the material fixed to the die and the groove shaft at 90 degrees; a seventh step of driving the X-axis servo motor to move an X-axis stage in the X-axis direction, and driving
- a flexible pedicle rodcomprising a straight-line portion, wherein one end of the straight-line portion is formed on a straight line and the other end of the straight-line portion is formed on the same straight line; and a spring-shaped elastic portion wound in a spiral shape at a predetermined portion between the straight-line portions, wherein the elastic portion and the rod body are formed to be eccentric by a predetermined interval.
- a major feature of the present inventionis to produce in large quantities of pedicle rods each having a coil-shaped elastic portion from the conventional rigid rod with no elasticity.
- FIG. 1is a perspective view of a conventional pedicle fixing apparatus having a pedicle screw system for a surgical correction of spinal deformity;
- FIG. 2is a perspective view of a conventional pedicle fixing apparatus installed in vertebrae lumbales;
- FIGS. 4 to 6are front, right lateral and left lateral views of an apparatus for fabricating a flexible pedicle rod according to the present invention
- FIG. 7is a flow chart illustrating a method for fabricating the flexible pedicle rod according to the present invention.
- FIG. 8is a schematic view illustrating a fabricating procedures of the flexible pedicle rod according to the present invention.
- FIG. 9is a perspective view of the flexible pedicle rod according to the present invention.
- a material for a pedicle rod used for the apparatus according to the one embodiment of the present inventionis fabricated using a shape-memory alloy that does not harm human beings in various types of shape-memory alloys, particularly Nitinol (i.e., Ni—Ti alloy).
- Nitinoli.e., Ni—Ti alloy
- the present inventionis not limited to a pedicle rod using Nitinol. That is, a metal that does not harm human beings, e.g., a titanium-based metal (including an alloy), a stainless 316 (SUS 316) metal or the like may also be used to fabricate a pedicle rod according to one embodiment of the present invention.
- an apparatus for fabricating a flexible pedicle rodincludes a body 2 having a Y-axis servo motor (not shown) built therein; a Y-axis stage 4 mounted on a top surface of the body 2 to move in a Y-axis direction by means of a driving force of the Y-axis servo motor; an X-axis servo motor 6 mounted on one side of the body 2 ; an X-axis stage 8 mounted on the Y-axis stage 4 to move in an X-axis direction by means of a driving force of the X-axis servo motor; a magazine 10 mounted on the Y-axis stage 4 at a predetermined inclination angle to load a material; a feeder 12 mounted at a rear end of the magazine 10 to withdraw materials loaded to the magazine 10 by moving them forward one by one; a feeder driving motor 14 for providing rotation power to the feeder 12 such that the feeder 12 can move forward; a first timing belt 15 for connecting
- an elastic portion formed in the materialcan be molded in the shape of a string wound in a left or right direction.
- a power source switch(not shown) mounted on the controller panel 26 is turned on, thereby initializing the apparatus (S 10 ). If the feeder driving motor 14 is operated after loading a material to the magazine 10 in the initial state of the apparatus, the feeder 12 moves straight to withdraw the material toward the die 16 (S 20 ). One end of the withdrawn material is gripped by the die 16 , and the other end of the withdrawn material is fixed to the groove shaft 20 a of the fixing base 20 opposite to the die 16 on an axis line, thereby completing the setup of the material (S 30 ) ((a) to (d) of FIG. 8 ).
- an interval at which both ends of the material are grippedis about 15 mm.
- the C-axis motor 22After completing the primary winding of the material, the C-axis motor 22 is rotated and driven, and the X-axis stage 8 moves and rotates the material three times on a spiral line, thereby performing a secondary winding (S 60 ) ((h) and (i) of FIG. 8 ).
- the materialforms an elastic portion in a spring shape through.
- the elastic portionsince the C-axis motor 22 is positively and reversely rotatable, the elastic portion forms a spring wound in a right screw direction in a positive rotating operation, and forms a spring wound in a left screw direction in a reverse rotating operation.
- a gripping forceis eliminated from the die 16 ((j) of FIG. 8 ).
- the Y-axis stage 4moves by driving the Y-axis motor, thereby leaving the material from the die 16 . If the cylinder 24 moves straight to pass through the groove shaft 20 a of the fixing base 20 , the molded material fixed to the groove shaft 20 a is discharged (S 70 ) ((k) of FIG. 8 ).
- a flexible pedicle rod 30 fabricated through the aforementioned configuration and fabricating methodincludes a rigid rod body 31 having a straight line shape and a flexible elastic portion 32 having a spring shape.
- the pedicle rod 30is formed into an eccentric structure in which the center of the rod body 31 has a predetermined deviation t with respect to the center of the elastic portion 32 . Since the heights of screws implanted into a pedicle are different from one another in a vertebral pedicle correcting operation, the pedicle rod 30 prevents the elastic portion 32 from being interfered by the pedicle when the pedicle rod 30 is seated on the pedicle.
- the flexible pedicle rod 30is flexible only at the elastic portion 32 and the rod body 31 is a rigid part, three-dimensional flexibility can be provided even though an error occurs in the process of connecting the pedicle rod 30 after the implant of the pedicle screws.
- a pedicle rod having a relatively short length and a rigid propertyis provided with a flexible elastic portion, and it is possible to produce in large quantities of pedicle rods with such a structure, so that the pedicle rods can be remarkably commercialized in a pedicle correcting operation.
- the pedicle rod provided with an elastic portion fabricated according to one embodiment of the present inventionis deformed at a predetermined temperature and formed of a memory-shape alloy (nitanol) with superelasticity so that flexibility and durability can be maximized, and an operation can be easily performed due to flexibility caused at a deformation temperature of 10° C. or less, possessed by the shape-memory alloy.
- the present inventionprovides a pedicle fixing apparatus using a pedicle rod provided with an elastic portion and a noble connection method for fixing the pedicle rod with segments, so that instability between spinal segments are cured, and exercise between the spinal segments can be maintained.
- a side effect of an operation using the conventional rigid rodcan be reduced, and an operation can be easily performed.
Landscapes
- Health & Medical Sciences (AREA)
- Orthopedic Medicine & Surgery (AREA)
- Life Sciences & Earth Sciences (AREA)
- Neurology (AREA)
- Surgery (AREA)
- Heart & Thoracic Surgery (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Medical Informatics (AREA)
- Molecular Biology (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Surgical Instruments (AREA)
Abstract
Description
- The present invention relates to a rod capable of securely connecting pedicle screws in a pedicle screw system for correcting a damaged or transformed spine and a method and an apparatus for fabricating the same and, more particularly, to a flexible pedicle rod with superelasticity in order to provide flexibility to a fixation between spine segments and a method and an apparatus capable of fabricating the same in mass production.
- Generally, when the spine undergoes bad environments of artificial factors and degenerative spine disease and is maintained in abnormal postures for a long time, serious back pain is induced by the press of the nerve system passing through the spinal canal.
- In general, in the case where the conservative treatment has an effect on the patients with degenerative spine disease, the patients need the surgical treatment. Particularly, a spinal fusion treatment is carried out in spinal stenosis, spondylolisdthesis and spondylolysis accompanying instability between spinal segments. A conventional surgical treatment to use a rigid rod, which does not have mobility at all, gives rise to many side effects on the patients as time goes on. Therefore, a pedicle fixing apparatus is to be inserted into an injured or wrenched site of the spine in order that the injured or wrenched site is neither suppressed nor is ruined or the part thereof is not pressed or pushed down.
- As shown in
FIGS. 1 and 2 , a conventional pedicle fixing apparatus includes a plurality ofpedicle screws 200 which are respectively inserted, as a supporting member, through the pedicle into injured or deformed vertebra, wherein each of thepedicle screws 200 has ahead 201 with aU-shaped rod passage 201a;rods 250 for making a correction of the pedicle through an interconnection between thepedicle screws 200; setscrews 300 to be inserted into therod passage 201afor fixing therods 250; and atransverse link 400 for holding a pair of therods 250. - In the pedicle fixing apparatus of
FIG. 1 , the rod plays an important role in the fixation of the deformed vertebra. Therefore, the quality of the material, elasticity, and so on, of the rod has a significant influence on the human body. - Since most conventional rods are formed out of a titanium material for a medical treatment, the rods themselves do not have elasticity. There is a problem in that it is difficult to maintain a normal waist curve because the fusion of the spine segments is conducted according to the shape of the rod after the surgical spine correction. Moreover, after the spine completely fuses to the arrangement form of the rod, since a load is concentrated on the upper segment or the lower segment of the spine into which the pedicle screws are inserted, instability and another stenosis can be caused after several years.
- To solve the demerit of the rigid rod, various methods to partially provide elasticity to a part of the rod have been introduced. Particularly, in order to solve the demerit of the conventional rods effectively and to make the surgical correction of spinal deformity easy, the applicant of the present invention introduced a rod for the pedicle fixation using a shape memory alloy such as a Ni—Ti alloy (Nitinol) which is harmless in the human body with high congeniality and has the property similar to the human tissue in superelasticity and absorption nature. For example, the various rods have been introduced in Korean patent application Nos. 2004-76105, 2004-76106, 2004-97833 and 2004-97834.
- As shown in
FIGS. 3 aand3b, a rod (600) described in the cited references has abody 602 and anelastic member 604, which has a coil type formed in the middle of thebody 602, to provide the flexibility to therod 600. This flexible rod has a length of approximately 80 to 100 mm (typically, 82 mm) and a small standard diameter of approximately 3 to 6 mm. Since the material of the rod itself is to have the hard metal organization and the rod is to be manufactured in a coil type with the shape memory through a heating process, it is very difficult to form the elastic member of the coil type in the middle of the rod. The rod having the coil section is manually made due to the drawback to the manufacture of the rod; however, it is very difficult to make the rod uniform and it is impossible to realize the mass production and commercialization. - On the other hand, when the surgical correction of spinal deformity, in which two parts of the rod body are different from each other in height, is performed, the elastic member having a large volume causes a surgical inconvenience in the procedure of securing the rod within the pedicle screw because the body described in the cited references is positioned at the central axis of the elastic member and then the pedicle can be in contact with the elastic member. In this case, there is a problem in that an inevitable operation procedure which has to dig a space out of the spine is required.
- Embodiments of the present invention are directed to providing an apparatus for fabricating a flexible rod of a pedicle screw system in mass production, wherein the fixation between spinal segments is improved after the surgical correction of spinal deformity and superelasticity is provided for a part of the flexible rod in order that an elastic power is induced when an external force is applied to the spine.
- Also, embodiments of the present invention are directed to providing a rod of a pedicle screw system, which has no interference from a elastic section of the rod in the surgical correction of spinal deformity, by providing eccentricity between a rod body and the elastic section.
- According to an aspect to the present invention, there is provided an apparatus for fabricating a flexible pedicle rod for pedicle fixation, the apparatus comprising a body; an X- and Y-axis moving element mounted on a top surface of the body, the X- and Y-axis moving element simultaneously moving in X-axis and Y-axis directions to wind a material at an angle of 90 degrees; a magazine mounted on the X- and Y-axis moving element to load a material; a material withdrawing element for withdrawing materials one by one from the magazine; and a material molding element mounted on the X- and Y-axis moving element, the material molding element gripping both ends of the material withdrawn from the material withdrawing element and rotating to mold a portion of the material in a spring shape.
- According to another aspect to the present invention, there is provided a method for fabricating a flexible pedicle rod for pedicle fixation, the method comprising a first step of initializing; a second step of driving a feeder driving motor to move a feeder straight in the initialization state, thereby withdrawing a material from a magazine; a third step of gripping one end of the material moving straight by the feeder at the die; a fourth step of driving an Y-axis servo motor built in a body to move an Y-axis stage straight, thereby fixing the other end of the material to a groove shaft of a fixing base; a fifth step of driving a high-frequency heater to heat the material at a predetermined temperature; a sixth step of respectively driving Y-axis and X-axis servo motors in Y-axis and X-axis directions to wind the material fixed to the die and the groove shaft at 90 degrees; a seventh step of driving the X-axis servomotor to move an X-axis stage in the X-axis direction, and driving a rotating motor mounted on the X-axis stage to wind the material fixed to the fixing base on a spiral line and wind the material in a coil shape; and an eighth step of discharging the material.
- According to still another aspect to the present invention, there is provided a flexible pedicle rod prepared by a process comprising a first step of initializing; a second step of driving a feeder driving motor to move a feeder straight in the initialization state, thereby withdrawing a material from a magazine; a third step of gripping one end of the material moving straight by the feeder at the die; a fourth step of driving an Y-axis servo motor built in a body to move an Y-axis stage straight, thereby fixing the other end of the material to a groove shaft of a fixing base; a fifth step of driving a high-frequency heater to heat the material at a predetermined temperature; a sixth step of respectively driving Y-axis and X-axis servo motors in Y-axis and X-axis directions to wind the material fixed to the die and the groove shaft at 90 degrees; a seventh step of driving the X-axis servo motor to move an X-axis stage in the X-axis direction, and driving a rotating motor mounted on the X-axis stage to wind the material fixed to the fixing base on a spiral line and wind the material in a coil shape; and an eighth step of discharging the material.
- According to still another aspect to the present invention, there is provided a flexible pedicle rod comprising a straight-line portion, wherein one end of the straight-line portion is formed on a straight line and the other end of the straight-line portion is formed on the same straight line; and a spring-shaped elastic portion wound in a spiral shape at a predetermined portion between the straight-line portions, wherein the elastic portion and the rod body are formed to be eccentric by a predetermined interval.
- As described in one embodiment of the present invention, a major feature of the present invention is to produce in large quantities of pedicle rods each having a coil-shaped elastic portion from the conventional rigid rod with no elasticity.
- The above and other aspects, features and other advantages of the subject matter of the present disclosure will be more clearly understood from the following detailed description taken in conjunction with the accompanying drawings, in which:
FIG. 1 is a perspective view of a conventional pedicle fixing apparatus having a pedicle screw system for a surgical correction of spinal deformity;FIG. 2 is a perspective view of a conventional pedicle fixing apparatus installed in vertebrae lumbales;FIGS. 3 aand3bare views illustrating flexible pedicle rods used in the conventional pedicle fixing apparatus;FIGS. 4 to 6 are front, right lateral and left lateral views of an apparatus for fabricating a flexible pedicle rod according to the present invention;FIG. 7 is a flow chart illustrating a method for fabricating the flexible pedicle rod according to the present invention;FIG. 8 is a schematic view illustrating a fabricating procedures of the flexible pedicle rod according to the present invention; andFIG. 9 is a perspective view of the flexible pedicle rod according to the present invention.- Hereinafter, exemplary embodiments of the present invention will be described with reference to accompanying drawings.
- A apparatus and a method for fabricating a flexible pedicle rod for pedicle fixation according to one embodiment of the present invention are implemented to produce in large quantities of pedicle rods in the state that a superelastic force is applied to a portion of each of the pedicle rods.
- A material for a pedicle rod used for the apparatus according to the one embodiment of the present invention is fabricated using a shape-memory alloy that does not harm human beings in various types of shape-memory alloys, particularly Nitinol (i.e., Ni—Ti alloy). The present invention is not limited to a pedicle rod using Nitinol. That is, a metal that does not harm human beings, e.g., a titanium-based metal (including an alloy), a stainless 316 (SUS 316) metal or the like may also be used to fabricate a pedicle rod according to one embodiment of the present invention.
- As illustrated in
FIGS. 4 to 6 , an apparatus for fabricating a flexible pedicle rod includes abody 2 having a Y-axis servo motor (not shown) built therein; a Y-axis stage4 mounted on a top surface of thebody 2 to move in a Y-axis direction by means of a driving force of the Y-axis servo motor; an X-axis servo motor6 mounted on one side of thebody 2; anX-axis stage 8 mounted on the Y-axis stage4 to move in an X-axis direction by means of a driving force of the X-axis servo motor; amagazine 10 mounted on the Y-axis stage4 at a predetermined inclination angle to load a material; afeeder 12 mounted at a rear end of themagazine 10 to withdraw materials loaded to themagazine 10 by moving them forward one by one; afeeder driving motor 14 for providing rotation power to thefeeder 12 such that thefeeder 12 can move forward; afirst timing belt 15 for connecting between thefeeder 12 and thefeeder driving motor 14 to deliver power; adie 16 mounted in front of thefeeder 12 to grip a rear end of a material supplied by means of the operation of thefeeder 12; a high-frequency heater 18 mounted at one side of thefeeder 12 to provide a predetermined heat source to a material through acoil 18awound on an outer circumferential surface of thedie 16 and then moving to a heating position of the material by means of a driving force of the Y-axis servo motor6; afixing base 20 mounted on the Y-axis stage4 and having agroove shaft 20amounted at a front side of thefixing base 20, the groove shaft supporting a material by fixing the other end of the material thereto; a C-axis motor 22 for providing a rotation force to thefixing base 20 to wind a material in a spiral shape; asecond timing belt 23 for connecting between thegroove shaft 20aof thefixing base 20 and the C-axis motor 22 to deliver power; and acylinder 24 mounted at a rear of thefixing base 20 to discharge a molded material from thegroove shaft 20aby moving straight toward thegroove shaft 20a.Reference numeral26 denotes a controller panel. - In the aforementioned configuration, since the C-
axis motor 22 is positively and reversely rotatable, an elastic portion formed in the material can be molded in the shape of a string wound in a left or right direction. - Hereinafter, fabricating processes using the apparatus for fabricating a flexible pedicle rod according to the one embodiment of the present invention will be described in detail with respect to
FIGS. 7 and 8 . - First, a power source switch (not shown) mounted on the controller panel26 is turned on, thereby initializing the apparatus (S10). If the
feeder driving motor 14 is operated after loading a material to themagazine 10 in the initial state of the apparatus, thefeeder 12 moves straight to withdraw the material toward the die16 (S20). One end of the withdrawn material is gripped by thedie 16, and the other end of the withdrawn material is fixed to thegroove shaft 20aof thefixing base 20 opposite to thedie 16 on an axis line, thereby completing the setup of the material (S30) ((a) to (d) ofFIG. 8 ). - In the embodiment of the present invention, an interval at which both ends of the material are gripped is about 15 mm.
- After completing the step S30, the high-
frequency heater 18 and thecoil 18aof the high-frequency heater 18 heat the material withdrawn from thedie 16 while moving by means of the operation of the Y-axis servo motor (S40) ((c) and (d) ofFIG. 8 ). At this time. The temperature at which the material is heated by the high-frequency heater 18 is about 600 to 700° C. If the heating temperature of the material is 600° C. or less, it is difficult to obtain a molded product having a desired shape. If the heating temperature of the material is 700° C. or more, a change in property of the material may be caused. - When the heating of the material is completed, the Y-axis and X-axis servo motors are simultaneously driven. Accordingly, the Y-axis and
X-axis stages 4 and8 move in the Y-axis and X-axis directions, respectively. Through the operations of the Y-axis andX-axis stages 4 and8, theX-axis stage 8 is rotated in a direction of 90° about thedie 16, and the material having both ends fixed to thedie 16 and thegroove shaft 20aof thefixing base 20 is primarily bent at an angle of 90° (S50) ((e), (f) and (g) ofFIG. 8 ). - After completing the primary winding of the material, the C-
axis motor 22 is rotated and driven, and theX-axis stage 8 moves and rotates the material three times on a spiral line, thereby performing a secondary winding (S60) ((h) and (i) ofFIG. 8 ). Through the operation, the material forms an elastic portion in a spring shape through. At the step S50, since the C-axis motor 22 is positively and reversely rotatable, the elastic portion forms a spring wound in a right screw direction in a positive rotating operation, and forms a spring wound in a left screw direction in a reverse rotating operation. - After completing the spring molding of the material, a gripping force is eliminated from the die16 ((j) of
FIG. 8 ). The Y-axis stage4 moves by driving the Y-axis motor, thereby leaving the material from the die16. If thecylinder 24 moves straight to pass through thegroove shaft 20aof the fixingbase 20, the molded material fixed to thegroove shaft 20ais discharged (S70) ((k) ofFIG. 8 ). - After discharging the material as described above, compressed air is provided to the die16 from the outside, thereby cooling the die16 (S80).
- As illustrated in
FIG. 9 , aflexible pedicle rod 30 fabricated through the aforementioned configuration and fabricating method includes arigid rod body 31 having a straight line shape and a flexibleelastic portion 32 having a spring shape. At this time, thepedicle rod 30 is formed into an eccentric structure in which the center of therod body 31 has a predetermined deviation t with respect to the center of theelastic portion 32. Since the heights of screws implanted into a pedicle are different from one another in a vertebral pedicle correcting operation, thepedicle rod 30 prevents theelastic portion 32 from being interfered by the pedicle when thepedicle rod 30 is seated on the pedicle. That is, when thepedicle rod 30 is fabricated in the state that the center of therod body 31 is positioned on the same line with respect to the center of theelastic portion 32, a circumferential surface of theelastic portion 32 contacts the pedicle in the process of seating thepedicle rod 30 into a receiving groove of each of the screws with different heights. For this reason, it is difficult to seat thepedicle rod 30, and a vertebral bone may be unavoidably cut down by an interval at which theelastic portion 32 contacts the pedicle. However, since theelastic portion 32 can face upward in thepedicle rod 30 having eccentricity as described in the one embodiment of the present invention, interference between theelastic portion 32 and the pedicle does not occur. - In addition, since the
flexible pedicle rod 30 is flexible only at theelastic portion 32 and therod body 31 is a rigid part, three-dimensional flexibility can be provided even though an error occurs in the process of connecting thepedicle rod 30 after the implant of the pedicle screws. - As described above, according to one embodiment of the present invention, a pedicle rod having a relatively short length and a rigid property is provided with a flexible elastic portion, and it is possible to produce in large quantities of pedicle rods with such a structure, so that the pedicle rods can be remarkably commercialized in a pedicle correcting operation.
- The pedicle rod provided with an elastic portion fabricated according to one embodiment of the present invention is deformed at a predetermined temperature and formed of a memory-shape alloy (nitanol) with superelasticity so that flexibility and durability can be maximized, and an operation can be easily performed due to flexibility caused at a deformation temperature of 10° C. or less, possessed by the shape-memory alloy. Further, the present invention provides a pedicle fixing apparatus using a pedicle rod provided with an elastic portion and a noble connection method for fixing the pedicle rod with segments, so that instability between spinal segments are cured, and exercise between the spinal segments can be maintained. In addition, a side effect of an operation using the conventional rigid rod can be reduced, and an operation can be easily performed.
- Although preferred embodiments of the present invention have been described for illustrative purposes, those skilled in the art will appreciate that various modifications, additions and substitutions are possible, without departing from the scope and spirit of the invention as disclosed in the accompanying claims.
Claims (3)
1-10. (canceled)
11. A flexible pedicle rod comprising:
a straight-line portion, wherein one end of the straight-line portion is formed on a straight line and the other end of the straight-line portion is formed on the same straight line; and
a spring-shaped elastic portion wound in a spiral shape at a predetermined portion between the straight-line portions, wherein the elastic portion and the rod body are formed to be eccentric by a predetermined interval.
12. A flexible pedicle rod prepared by a process comprising:
a first step of initializing;
a second step of driving a feeder driving motor to move a feeder straight in the initialization state, thereby withdrawing a material from a magazine;
a third step of gripping one end of the material moving straight by the feeder at the die;
a fourth step of driving an Y-axis servo motor built in a body to move an Y-axis stage straight, thereby fixing the other end of the material to a groove shaft of a fixing base;
a fifth step of driving a high-frequency heater to heat the material at a predetermined temperature;
a sixth step of respectively driving Y-axis and X-axis servo motors in Y-axis and X-axis directions to wind the material fixed to the die and the groove shaft at 90 degrees;
a seventh step of driving the X-axis servo motor to move an X-axis stage in the X-axis direction, and driving a rotating motor mounted on the X-axis stage to wind the material fixed to the fixing base on a spiral line and wind the material in a coil shape; and
an eighth step of discharging the material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US12/823,657US20100262189A1 (en) | 2006-09-07 | 2010-06-25 | Flexible rod manufacturing apparatus and method for a spinal fixation and the flexible rod manufactured through the same |
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020060086345AKR100817788B1 (en) | 2006-09-07 | 2006-09-07 | Apparatus and method for manufacturing a pedicle fixation rod and a rod manufactured through the apparatus |
| KR10-2006-0086345 | 2006-09-07 | ||
| US11/851,104US7765843B2 (en) | 2006-09-07 | 2007-09-06 | Flexible rod manufacturing apparatus and method for a spinal fixation and the flexible rod manufactured through the same |
| US12/823,657US20100262189A1 (en) | 2006-09-07 | 2010-06-25 | Flexible rod manufacturing apparatus and method for a spinal fixation and the flexible rod manufactured through the same |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US11/851,104DivisionUS7765843B2 (en) | 2006-09-07 | 2007-09-06 | Flexible rod manufacturing apparatus and method for a spinal fixation and the flexible rod manufactured through the same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US20100262189A1true US20100262189A1 (en) | 2010-10-14 |
Family
ID=39170697
Family Applications (3)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US11/851,104Active2028-05-21US7765843B2 (en) | 2006-09-07 | 2007-09-06 | Flexible rod manufacturing apparatus and method for a spinal fixation and the flexible rod manufactured through the same |
| US12/823,687AbandonedUS20100257911A1 (en) | 2006-09-07 | 2010-06-25 | Flexible rod manufacturing apparatus and method for a spinal fixation and the flexible rod manufactured through the same |
| US12/823,657AbandonedUS20100262189A1 (en) | 2006-09-07 | 2010-06-25 | Flexible rod manufacturing apparatus and method for a spinal fixation and the flexible rod manufactured through the same |
Family Applications Before (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US11/851,104Active2028-05-21US7765843B2 (en) | 2006-09-07 | 2007-09-06 | Flexible rod manufacturing apparatus and method for a spinal fixation and the flexible rod manufactured through the same |
| US12/823,687AbandonedUS20100257911A1 (en) | 2006-09-07 | 2010-06-25 | Flexible rod manufacturing apparatus and method for a spinal fixation and the flexible rod manufactured through the same |
Country Status (2)
| Country | Link |
|---|---|
| US (3) | US7765843B2 (en) |
| KR (1) | KR100817788B1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20150305779A1 (en)* | 2012-08-21 | 2015-10-29 | Pierre M. Montavon | Spring and device for stabilizing human or animal bone |
| US9907578B2 (en)* | 2008-09-05 | 2018-03-06 | Biedermann Technologies Gmbh & Co. Kg | Bone anchoring element and stabilization device for bones, in particular for the spinal column |
Families Citing this family (64)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7833250B2 (en) | 2004-11-10 | 2010-11-16 | Jackson Roger P | Polyaxial bone screw with helically wound capture connection |
| US8353932B2 (en) | 2005-09-30 | 2013-01-15 | Jackson Roger P | Polyaxial bone anchor assembly with one-piece closure, pressure insert and plastic elongate member |
| US8292926B2 (en) | 2005-09-30 | 2012-10-23 | Jackson Roger P | Dynamic stabilization connecting member with elastic core and outer sleeve |
| US10729469B2 (en) | 2006-01-09 | 2020-08-04 | Roger P. Jackson | Flexible spinal stabilization assembly with spacer having off-axis core member |
| US10258382B2 (en) | 2007-01-18 | 2019-04-16 | Roger P. Jackson | Rod-cord dynamic connection assemblies with slidable bone anchor attachment members along the cord |
| US7862587B2 (en) | 2004-02-27 | 2011-01-04 | Jackson Roger P | Dynamic stabilization assemblies, tool set and method |
| US8876868B2 (en) | 2002-09-06 | 2014-11-04 | Roger P. Jackson | Helical guide and advancement flange with radially loaded lip |
| US7621918B2 (en) | 2004-11-23 | 2009-11-24 | Jackson Roger P | Spinal fixation tool set and method |
| US7377923B2 (en) | 2003-05-22 | 2008-05-27 | Alphatec Spine, Inc. | Variable angle spinal screw assembly |
| US7766915B2 (en) | 2004-02-27 | 2010-08-03 | Jackson Roger P | Dynamic fixation assemblies with inner core and outer coil-like member |
| US8092500B2 (en) | 2007-05-01 | 2012-01-10 | Jackson Roger P | Dynamic stabilization connecting member with floating core, compression spacer and over-mold |
| US7776067B2 (en) | 2005-05-27 | 2010-08-17 | Jackson Roger P | Polyaxial bone screw with shank articulation pressure insert and method |
| US7967850B2 (en) | 2003-06-18 | 2011-06-28 | Jackson Roger P | Polyaxial bone anchor with helical capture connection, insert and dual locking assembly |
| US8366753B2 (en) | 2003-06-18 | 2013-02-05 | Jackson Roger P | Polyaxial bone screw assembly with fixed retaining structure |
| US8926670B2 (en) | 2003-06-18 | 2015-01-06 | Roger P. Jackson | Polyaxial bone screw assembly |
| US7527638B2 (en) | 2003-12-16 | 2009-05-05 | Depuy Spine, Inc. | Methods and devices for minimally invasive spinal fixation element placement |
| US7179261B2 (en) | 2003-12-16 | 2007-02-20 | Depuy Spine, Inc. | Percutaneous access devices and bone anchor assemblies |
| US11419642B2 (en) | 2003-12-16 | 2022-08-23 | Medos International Sarl | Percutaneous access devices and bone anchor assemblies |
| US7160300B2 (en) | 2004-02-27 | 2007-01-09 | Jackson Roger P | Orthopedic implant rod reduction tool set and method |
| US8152810B2 (en) | 2004-11-23 | 2012-04-10 | Jackson Roger P | Spinal fixation tool set and method |
| JP2007525274A (en) | 2004-02-27 | 2007-09-06 | ロジャー・ピー・ジャクソン | Orthopedic implant rod reduction instrument set and method |
| US11241261B2 (en) | 2005-09-30 | 2022-02-08 | Roger P Jackson | Apparatus and method for soft spinal stabilization using a tensionable cord and releasable end structure |
| US7651502B2 (en) | 2004-09-24 | 2010-01-26 | Jackson Roger P | Spinal fixation tool set and method for rod reduction and fastener insertion |
| US8926672B2 (en) | 2004-11-10 | 2015-01-06 | Roger P. Jackson | Splay control closure for open bone anchor |
| US9980753B2 (en) | 2009-06-15 | 2018-05-29 | Roger P Jackson | pivotal anchor with snap-in-place insert having rotation blocking extensions |
| WO2006057837A1 (en) | 2004-11-23 | 2006-06-01 | Jackson Roger P | Spinal fixation tool attachment structure |
| US9216041B2 (en) | 2009-06-15 | 2015-12-22 | Roger P. Jackson | Spinal connecting members with tensioned cords and rigid sleeves for engaging compression inserts |
| US8444681B2 (en) | 2009-06-15 | 2013-05-21 | Roger P. Jackson | Polyaxial bone anchor with pop-on shank, friction fit retainer and winged insert |
| US9168069B2 (en) | 2009-06-15 | 2015-10-27 | Roger P. Jackson | Polyaxial bone anchor with pop-on shank and winged insert with lower skirt for engaging a friction fit retainer |
| US7901437B2 (en) | 2007-01-26 | 2011-03-08 | Jackson Roger P | Dynamic stabilization member with molded connection |
| US8105368B2 (en) | 2005-09-30 | 2012-01-31 | Jackson Roger P | Dynamic stabilization connecting member with slitted core and outer sleeve |
| US7815663B2 (en)* | 2006-01-27 | 2010-10-19 | Warsaw Orthopedic, Inc. | Vertebral rods and methods of use |
| CA2670988C (en) | 2006-12-08 | 2014-03-25 | Roger P. Jackson | Tool system for dynamic spinal implants |
| US8475498B2 (en) | 2007-01-18 | 2013-07-02 | Roger P. Jackson | Dynamic stabilization connecting member with cord connection |
| US8366745B2 (en) | 2007-05-01 | 2013-02-05 | Jackson Roger P | Dynamic stabilization assembly having pre-compressed spacers with differential displacements |
| US8012177B2 (en) | 2007-02-12 | 2011-09-06 | Jackson Roger P | Dynamic stabilization assembly with frusto-conical connection |
| US8979904B2 (en) | 2007-05-01 | 2015-03-17 | Roger P Jackson | Connecting member with tensioned cord, low profile rigid sleeve and spacer with torsion control |
| US10383660B2 (en) | 2007-05-01 | 2019-08-20 | Roger P. Jackson | Soft stabilization assemblies with pretensioned cords |
| CA2690038C (en) | 2007-05-31 | 2012-11-27 | Roger P. Jackson | Dynamic stabilization connecting member with pre-tensioned solid core |
| US8911477B2 (en) | 2007-10-23 | 2014-12-16 | Roger P. Jackson | Dynamic stabilization member with end plate support and cable core extension |
| AU2010260521C1 (en) | 2008-08-01 | 2013-08-01 | Roger P. Jackson | Longitudinal connecting member with sleeved tensioned cords |
| US8118840B2 (en) | 2009-02-27 | 2012-02-21 | Warsaw Orthopedic, Inc. | Vertebral rod and related method of manufacture |
| US8998959B2 (en) | 2009-06-15 | 2015-04-07 | Roger P Jackson | Polyaxial bone anchors with pop-on shank, fully constrained friction fit retainer and lock and release insert |
| US11229457B2 (en) | 2009-06-15 | 2022-01-25 | Roger P. Jackson | Pivotal bone anchor assembly with insert tool deployment |
| US9668771B2 (en) | 2009-06-15 | 2017-06-06 | Roger P Jackson | Soft stabilization assemblies with off-set connector |
| CN103826560A (en) | 2009-06-15 | 2014-05-28 | 罗杰.P.杰克逊 | Polyaxial Bone Anchor with Socket Stem and Winged Inserts with Friction Fit Compression Collars |
| US8657856B2 (en) | 2009-08-28 | 2014-02-25 | Pioneer Surgical Technology, Inc. | Size transition spinal rod |
| US9011494B2 (en)* | 2009-09-24 | 2015-04-21 | Warsaw Orthopedic, Inc. | Composite vertebral rod system and methods of use |
| EP2485654B1 (en) | 2009-10-05 | 2021-05-05 | Jackson P. Roger | Polyaxial bone anchor with non-pivotable retainer and pop-on shank, some with friction fit |
| AU2011299558A1 (en) | 2010-09-08 | 2013-05-02 | Roger P. Jackson | Dynamic stabilization members with elastic and inelastic sections |
| AU2011324058A1 (en) | 2010-11-02 | 2013-06-20 | Roger P. Jackson | Polyaxial bone anchor with pop-on shank and pivotable retainer |
| CN102106750B (en)* | 2011-02-17 | 2013-04-03 | 上海微创骨科医疗科技有限公司 | A spinal dynamic connecting rod |
| JP5865479B2 (en) | 2011-03-24 | 2016-02-17 | ロジャー・ピー・ジャクソン | Multiaxial bone anchor with compound joint and pop-mounted shank |
| US8911478B2 (en) | 2012-11-21 | 2014-12-16 | Roger P. Jackson | Splay control closure for open bone anchor |
| US10058354B2 (en) | 2013-01-28 | 2018-08-28 | Roger P. Jackson | Pivotal bone anchor assembly with frictional shank head seating surfaces |
| US8852239B2 (en) | 2013-02-15 | 2014-10-07 | Roger P Jackson | Sagittal angle screw with integral shank and receiver |
| US9566092B2 (en) | 2013-10-29 | 2017-02-14 | Roger P. Jackson | Cervical bone anchor with collet retainer and outer locking sleeve |
| US9717533B2 (en) | 2013-12-12 | 2017-08-01 | Roger P. Jackson | Bone anchor closure pivot-splay control flange form guide and advancement structure |
| US9451993B2 (en) | 2014-01-09 | 2016-09-27 | Roger P. Jackson | Bi-radial pop-on cervical bone anchor |
| US10064658B2 (en) | 2014-06-04 | 2018-09-04 | Roger P. Jackson | Polyaxial bone anchor with insert guides |
| US9597119B2 (en) | 2014-06-04 | 2017-03-21 | Roger P. Jackson | Polyaxial bone anchor with polymer sleeve |
| KR102556649B1 (en) | 2022-10-12 | 2023-07-19 | 주식회사 부광테크 | Electrolytic Polishing |
| KR102577905B1 (en) | 2022-11-24 | 2023-09-14 | 주식회사 부광테크 | Electrolytic Polishing |
| KR20240166903A (en) | 2023-05-18 | 2024-11-26 | (주)시지바이오 | Pedicle screw assembly |
Citations (26)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1597549A (en)* | 1925-06-11 | 1926-08-24 | Andrew W Siegel | Tire chain |
| US1756444A (en)* | 1928-06-16 | 1930-04-29 | Schutte & Koerting Co | Electric heating means |
| US1906449A (en)* | 1932-04-13 | 1933-05-02 | Hider Steel Ball Works | Method of making coil springs |
| US2368775A (en)* | 1941-11-08 | 1945-02-06 | Landis & Gyr Ag | Toggle mechanism |
| US2441167A (en)* | 1942-03-27 | 1948-05-11 | Raspet August | Helical spring |
| US2473027A (en)* | 1945-05-04 | 1949-06-14 | American Steel Foundries | Spring product and method of forming same |
| USRE23974E (en)* | 1955-04-05 | Constant compression springs | ||
| US2710076A (en)* | 1952-09-26 | 1955-06-07 | Eaton Mfg Co | Friction brake |
| US2861768A (en)* | 1956-12-17 | 1958-11-25 | Vitro Corp Of America | Vibration isolation system and instrument mount |
| US3014711A (en)* | 1961-01-11 | 1961-12-26 | Arthur L Delvaux | Prestretched coiled spring for installation without tools |
| US3296366A (en)* | 1965-12-23 | 1967-01-03 | Mc Graw Edison Co | Outdoor high tension insulator having long creepage path |
| US3366400A (en)* | 1966-01-05 | 1968-01-30 | Fitch & Co Inc John | Vehicle suspensions |
| US3964736A (en)* | 1973-06-01 | 1976-06-22 | Huhnen Joachim W G | Helical extension spring and method of making same |
| US4088311A (en)* | 1976-05-03 | 1978-05-09 | Volkswagenwerk Aktiengesellschaft | Tension spring arrangement |
| US4372430A (en)* | 1980-02-25 | 1983-02-08 | Eaton Corporation | Drum brake and retaining spring |
| US4553545A (en)* | 1981-09-16 | 1985-11-19 | Medinvent S.A. | Device for application in blood vessels or other difficultly accessible locations and its use |
| US5692599A (en)* | 1996-01-10 | 1997-12-02 | Square D Company | Toggle spring for a circuit breaker |
| US5875666A (en)* | 1996-08-23 | 1999-03-02 | Kabushiki Kaisha Itaya Seisaku Sho | Spring manufacturing apparatus and position adjustment apparatus for tools |
| US6094957A (en)* | 1999-06-30 | 2000-08-01 | Masunaga Optical Mfg. Co., Ltd. | Method for bending difficult-to-work metallic wire and method for shaping coil section thereof |
| US20020113352A1 (en)* | 2001-01-26 | 2002-08-22 | Edwards Mark Stephen | Shock absorbing structures |
| US20040154365A1 (en)* | 2003-02-10 | 2004-08-12 | Katsuhide Tsuritani | Spring manufacturing machine |
| US20060064090A1 (en)* | 2004-09-22 | 2006-03-23 | Kyung-Woo Park | Bio-flexible spinal fixation apparatus with shape memory alloy |
| US7134305B2 (en)* | 2004-09-13 | 2006-11-14 | David Wu | Wire feeder driving mechanism for spring manufacturing machine |
| US20070112427A1 (en)* | 2005-11-16 | 2007-05-17 | Aoi Medical, Inc. | Intervertebral Spacer |
| US20090192548A1 (en)* | 2008-01-25 | 2009-07-30 | Jeon Dong M | Pedicle-laminar dynamic spinal stabilization device |
| US20090292314A1 (en)* | 2006-09-18 | 2009-11-26 | Spineart Sa | Lumbar interspinous prosthesis and its applications |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE502004004126D1 (en)* | 2003-10-17 | 2007-08-02 | Biedermann Motech Gmbh | Rod-shaped element for connecting bone anchoring elements, and stabilizing device with such a rod-shaped element |
| KR100645377B1 (en)* | 2004-09-22 | 2006-11-15 | (주)바이오스파인 | Pedicle fixation |
- 2006
- 2006-09-07KRKR1020060086345Apatent/KR100817788B1/enactiveActive
- 2007
- 2007-09-06USUS11/851,104patent/US7765843B2/enactiveActive
- 2010
- 2010-06-25USUS12/823,687patent/US20100257911A1/ennot_activeAbandoned
- 2010-06-25USUS12/823,657patent/US20100262189A1/ennot_activeAbandoned
Patent Citations (26)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| USRE23974E (en)* | 1955-04-05 | Constant compression springs | ||
| US1597549A (en)* | 1925-06-11 | 1926-08-24 | Andrew W Siegel | Tire chain |
| US1756444A (en)* | 1928-06-16 | 1930-04-29 | Schutte & Koerting Co | Electric heating means |
| US1906449A (en)* | 1932-04-13 | 1933-05-02 | Hider Steel Ball Works | Method of making coil springs |
| US2368775A (en)* | 1941-11-08 | 1945-02-06 | Landis & Gyr Ag | Toggle mechanism |
| US2441167A (en)* | 1942-03-27 | 1948-05-11 | Raspet August | Helical spring |
| US2473027A (en)* | 1945-05-04 | 1949-06-14 | American Steel Foundries | Spring product and method of forming same |
| US2710076A (en)* | 1952-09-26 | 1955-06-07 | Eaton Mfg Co | Friction brake |
| US2861768A (en)* | 1956-12-17 | 1958-11-25 | Vitro Corp Of America | Vibration isolation system and instrument mount |
| US3014711A (en)* | 1961-01-11 | 1961-12-26 | Arthur L Delvaux | Prestretched coiled spring for installation without tools |
| US3296366A (en)* | 1965-12-23 | 1967-01-03 | Mc Graw Edison Co | Outdoor high tension insulator having long creepage path |
| US3366400A (en)* | 1966-01-05 | 1968-01-30 | Fitch & Co Inc John | Vehicle suspensions |
| US3964736A (en)* | 1973-06-01 | 1976-06-22 | Huhnen Joachim W G | Helical extension spring and method of making same |
| US4088311A (en)* | 1976-05-03 | 1978-05-09 | Volkswagenwerk Aktiengesellschaft | Tension spring arrangement |
| US4372430A (en)* | 1980-02-25 | 1983-02-08 | Eaton Corporation | Drum brake and retaining spring |
| US4553545A (en)* | 1981-09-16 | 1985-11-19 | Medinvent S.A. | Device for application in blood vessels or other difficultly accessible locations and its use |
| US5692599A (en)* | 1996-01-10 | 1997-12-02 | Square D Company | Toggle spring for a circuit breaker |
| US5875666A (en)* | 1996-08-23 | 1999-03-02 | Kabushiki Kaisha Itaya Seisaku Sho | Spring manufacturing apparatus and position adjustment apparatus for tools |
| US6094957A (en)* | 1999-06-30 | 2000-08-01 | Masunaga Optical Mfg. Co., Ltd. | Method for bending difficult-to-work metallic wire and method for shaping coil section thereof |
| US20020113352A1 (en)* | 2001-01-26 | 2002-08-22 | Edwards Mark Stephen | Shock absorbing structures |
| US20040154365A1 (en)* | 2003-02-10 | 2004-08-12 | Katsuhide Tsuritani | Spring manufacturing machine |
| US7134305B2 (en)* | 2004-09-13 | 2006-11-14 | David Wu | Wire feeder driving mechanism for spring manufacturing machine |
| US20060064090A1 (en)* | 2004-09-22 | 2006-03-23 | Kyung-Woo Park | Bio-flexible spinal fixation apparatus with shape memory alloy |
| US20070112427A1 (en)* | 2005-11-16 | 2007-05-17 | Aoi Medical, Inc. | Intervertebral Spacer |
| US20090292314A1 (en)* | 2006-09-18 | 2009-11-26 | Spineart Sa | Lumbar interspinous prosthesis and its applications |
| US20090192548A1 (en)* | 2008-01-25 | 2009-07-30 | Jeon Dong M | Pedicle-laminar dynamic spinal stabilization device |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9907578B2 (en)* | 2008-09-05 | 2018-03-06 | Biedermann Technologies Gmbh & Co. Kg | Bone anchoring element and stabilization device for bones, in particular for the spinal column |
| US20150305779A1 (en)* | 2012-08-21 | 2015-10-29 | Pierre M. Montavon | Spring and device for stabilizing human or animal bone |
Also Published As
| Publication number | Publication date |
|---|---|
| US20080065071A1 (en) | 2008-03-13 |
| KR100817788B1 (en) | 2008-03-31 |
| US20100257911A1 (en) | 2010-10-14 |
| US7765843B2 (en) | 2010-08-03 |
| KR20080022767A (en) | 2008-03-12 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US7765843B2 (en) | Flexible rod manufacturing apparatus and method for a spinal fixation and the flexible rod manufactured through the same | |
| US9345520B2 (en) | Stabilization device for bones comprising a spring element and manufacturing method for said spring element | |
| JP4362235B2 (en) | Spacer | |
| US9445917B2 (en) | Methods and apparatus for expandable medical device employing flexure members | |
| JP4897766B2 (en) | Spacer | |
| US9023087B2 (en) | Percutaneous modular head-to-head cross connector | |
| JP2019193805A (en) | Tissue displacement tools and methods | |
| JP5421268B2 (en) | Flexible sliding dynamic implant system for selective stabilization and correction of spinal deformities and instabilities | |
| US20190262160A1 (en) | Orthosis for deformity correction | |
| JP2012513882A (en) | Vertebral distraction and fusion method and apparatus using flexure members | |
| AU2008279798A1 (en) | Segmental orthopedic device for spinal elongation and for treatment of scoliosis | |
| EP2967902A2 (en) | Spinal rods formed from polymer and hybrid materials and growth rod distraction system including same | |
| US10258480B1 (en) | Surgically implantable joint spacer | |
| TWI566739B (en) | Improved interbody fusion device and implant instrument and method of operation thereof | |
| CN210301329U (en) | Spinal deformity correction device | |
| KR100645377B1 (en) | Pedicle fixation | |
| KR100645396B1 (en) | Pedicle fixation | |
| KR101515724B1 (en) | Implant for treating of the spondylopathy | |
| EP2908750A1 (en) | Surgically implantable joint spacer | |
| EP3085319B1 (en) | Template for use in manufacturing an implant for spinal or other orthopaedic fixation and method of manufacturing such a template | |
| CN222929886U (en) | Interbody fusion cage | |
| KR100645398B1 (en) | Stapling device for chiropractic | |
| KR200372135Y1 (en) | Vertebral fixation apparatus having length variable type rod and pedicle screws | |
| KR101891194B1 (en) | Length adjustable rod for fixing the vertebra | |
| CN116725745A (en) | Non-contact magnetic control growth-type shape memory alloy artificial bone |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| STCB | Information on status: application discontinuation | Free format text:ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |