CN102551856B - Internal fixing system capable of dilating wound of spinal column in self-rotation manner - Google Patents

Abstract

The invention discloses an internal fixing system capable of self-dilation rotating wound of a spinal column in a manner. The internal fixing system consists of a bar, a rotating vertebral pedicle nail and a locking plug screw. The rotating vertebral pedicle nail consists of a U-shaped nail cap, a pin and a screw. A pin hole and a spherical hole are arranged at the bottom of the U-shaped nail cap, a pin hole and a spherical portion are arranged at the head of the screw, an angular deflection groove is arranged at the bottom of the U-shaped nail cap, and the screw can freely swing at a fan-shaped angle after being mounted on the U-shaped nail cap via the pin. After the rotating vertebral pedicle nail is mounted on a vertebral body via a vertebral pedicle, the bar is mounted in a U-shaped groove of the U-shaped nail cap. After the structure is mounted, the bar is pressed by locking pressure of the plug screw so as to apply pressure to the head of the screw on the rotating vertebral pedicle nail, as an obliquely angled arc groove is designed at the head of the screw, the screw generates rotating force along the pin, and the bar is finally completely adhered with the arc groove of the head of the screw due to a proper rotating angle. The vertebral body is dilated due to rotation, fracture reduction is realized, and the height of the injured vertebral body is normal again.

Description

Internal fixing system capable of dilating wound of spinal column in self-rotation manner

Technical field

The present invention relates to spinal surgery technical field of medical instruments, be specifically related to a kind of internal fixing system capable of dilating wound of spinal column in self-rotation manner.

Background technology

Fixing since 1987 come out in spinal injury pedicle, the nearly more than ten years are from U.S. to Europe and be widely used all over the world and develop, and various new fixed forms continue to bring out.Mainly be divided into nail rod and two systems of nail-plate according to the difference of connected mode.Previous system side overweights the reset of vertebral fracture and fixes, and a rear system is mainly used in centrum olisthe treatment, and along with the improvement of apparatus and going deep into of spinal biomechanics research, the scope of application is mutually intersected and expanded gradually.

Existing treatment spinal trauma spinal fixation system adopts the U-shaped nail of fixed angle more, adopt arc rod to install and carry out the reduction of the fracture, but arc rod due to often and the U-shaped mitre of following closely into, causes locking plug screw and installs very difficultly in installation process, often occurs the phenomenons such as quick-fried silk cunning tooth.Sofamor Danik company's T enor is by rod, chuck and pedicle nail composition, and pedicle nail can become with rod 11.5 ° of angles of one direction by chuck, carries out the reduction of the fracture by specific purpose tool.The USS system of A0 design is made up of excellent side direction fixture block and long-armed nail, long-armed nail is carried out to the reduction of the fracture by fixture block and excellent angulation with hands.Pedicle nail is designed to angle screw by this kind of character of apparatus of RF, and nail tail becomes 5 °, 10 °, 15 ° angles with nail bar.Nail tail designs one rear some open recess, claims again " U " staple tail, and rod snaps in groove, is locked by screw, between two rods connect, has a connection cross bar comparatively firm, is mainly used in T10～L5 vertebral fracture, has extraordinary curative effect.AF character of apparatus is, pitman is designed to one and is with angled telescoping structure, vertebral arch vertebra nail is still straight nail, and nail tail has reverse thread, the excellent groove combination in conjunction with one and half arcs by screw tailing screw flight, nut and rod of nail, and there have Self-locking screw to strengthen connection to be more strong.Operate more simply, greatly shorten operating time, and in clinical practice, reset effect is better than RF.But RF, AF, due to when design stress concentration, causes clinical broken nail rate higher.This apparatus of APF will be followed closely with rod and be connected by 1 lateral mass, and lateral mass is an entirety, and the screw hole of lateral mass is a tilted prick hole, 0 ° of the vertical line of its axis and screw formation, and 5 ', 10 °, 15 ° of angles are not etc.Nail rod in conjunction with time produce a corresponding angle, better reset makes to fracture, the self-locking of screw lateral mass, the omoplate that screw contacts with lateral mass is hexagon, corresponding lateral mass contact surface is slope, and the gradient on slope is consistent with lateral mass screw hole, has ramp portion and form sublevel without ramp in lateral mass, make hexagonal side and the step side of screw omoplate just in time hit and close, shortcoming is that implant volume is large.

Summary of the invention

The object of the invention is design a kind of from strutting rotation spinal trauma internal fixation system, can be in installation process automatic rotation angle, realize the reduction of the fracture, operation is installed simple, reliable in structure.

For achieving the above object, provided by the invention from strutting rotation spinal trauma internal fixation system, the technical scheme of employing is:

A kind of from strutting rotation spinal trauma internal fixation system, formed by rod, rotation pedicle nail, locking plug screw.Described rotation pedicle nail is made up of the U-shaped head of a nail, pin and screw.Described U-shaped head of a nail bottom is provided with pin hole one and ball-type hole, described screw head is provided with pin hole two and ball-type part, described U-shaped head of a nail bottom is provided with the deflection groove with angle, and described screw can freely become fan-shaped angle swinging after being installed on the U-shaped head of a nail by pin.Vertebral body is subject to occur fracture after wound, and injured vertebral body produces compression, rotation pedicle nail by pedicle of vertebral arch be installed to vertebral body upper after, due to the U-shaped head of a nail and the screw angulation that can freely swing, therefore rod is installed in the U-shaped groove of the U-shaped head of a nail and is very easy to.After structure is installed, the locking pressure that rod is subject to plug screw is exerted pressure to the screw head on rotation pedicle nail, because screw head is designed with the arc groove at oblique angle, makes screw produce revolving force along pin, and the anglec of rotation is that the arc groove of excellent final sum screw is fitted completely.Because this rotation is by pyramidal support, realize the reduction of the fracture, injured vertebral body recovers normal height.Because this anglec of rotation is fixed-direction, rotation pedicle nail installation direction on vertebral body must determine, therefore nails on and on the U-shaped head of a nail, is designed with direction signs groove and distinguished at rotation vertebrae nut.After structure locking, fit completely in the ball-type hole of the screw head ball-type part that rotation vertebrae nut nails on and U-shaped head of a nail bottom, and coupling mechanism force contact conduction by land portions, but not the pin nailing on by rotation vertebrae nut conducts, and structure is locked safety and reliability.

The invention has the beneficial effects as follows: simple in structure, novel in design, production and processing is simple, clinical manipulation is very convenient.Another the present invention resets to fracture because spinning in locking process struts, and does not need to rely on complicated operation instrument to carry out the reduction of the fracture in the past.Not only can be used for open surgery, also can be used for minimal invasive operation, will progressively produce good social benefit.

Accompanying drawing explanation

Fig. 1 is structural representation of the present invention.

Fig. 2 is structure A-A cutaway view of the present invention.

Fig. 3 is screw plug structure schematic diagram of the present invention.

Fig. 4 is bar structure schematic diagram of the present invention.

Fig. 5 is rotation vertebrae nut pin structure schematic diagram of the present invention.

Fig. 6 is the U-shaped head of a nail structural representation of rotation pedicle nail of the present invention.

Fig. 7 is rotation vertebrae nut oncomelania pin structure schematic diagram of the present invention.

Fig. 8 is that excellent schematic diagram is put in structure use of the present invention.

Fig. 9 is that structure use of the present invention struts schematic diagram.

The specific embodiment

Below in conjunction with embodiment, the invention will be further described.

If Fig. 1 is structural representation of the present invention; Fig. 2 is structure A-A cutaway view of the present invention; Fig. 3 is screw plug structure schematic diagram of the present invention; Fig. 4 is bar structure schematic diagram of the present invention; Fig. 5 is rotation vertebrae nut pin structure schematic diagram of the present invention; Fig. 6 is the U-shaped head of a nail structural representation of rotation pedicle nail of the present invention; Fig. 7 is rotation vertebrae nut oncomelania pin structure schematic diagram of the present invention; Fig. 8 is that excellent schematic diagram is put in structure use of the present invention; Fig. 9 is that structure use of the present invention struts schematic diagram.

A kind of internal fixing system capable of dilating wound of spinal column in self-rotation manner is made up ofplug screw 1,rod 2,rotation pedicle nail 3, and describedrotation pedicle nail 3 is made up of the U-shaped head of anail 31, pin 32 and screw 33.The described U-shaped head of anail 31 bottoms are provided withpin hole 1 and ball-type hole 313, the center of thispin hole 1 should with the center superposition in ball-type hole 313,screw 33 heads are provided withpin hole 2 332 and ball-type part 331, the center of thispin hole 2 332 should with the center superposition of ball-type part 331.The described U-shaped head of anail 31 bottom design have thedeflection groove 311 of A angle, andscrew 33 head design have the arc groove 333 of C angle, and A angle should be more than or equal toC angle.Screw 33 is assembled in the U-shaped head of anail 31, connects with pin 32, after connecting, betweenscrew 33 and the U-shaped head of anail 31, can freely rotate along pin 32 axles, andscrew 33 is A angle and the B angle of the U-shaped head of anail 31 bottom design along its axis slewing area.

As shown in Figure 8, vertebral body is subject to occur fracture after wound, and injured vertebral body produces compression, spinningpedicle nail 3 by pedicle of vertebral arch be installed to vertebral body upper after, because the U-shaped head of anail 31 andscrew 33 can freely rotate into B angle as shown in Figure 6, thereforerod 2 is installed in the U-shaped groove of the U-shaped head of anail 31 and is very easy to.

As shown in Fig. 9, Fig. 2, after structure is installed, the locking pressure thatrod 2 is subject toplug screw 1 is exerted pressure to screw 33 heads onrotation pedicle nail 3, becausescrew 33 is designed with the arc groove 333 at oblique angle, makescrew 33 produce revolving force along pin 32, the anglec of rotation is the C angle that arc groove 333 designs.Because this rotation is by pyramidal support, realize the reduction of the fracture, injured vertebral body recovers normal height.

As shown in Fig. 9, Fig. 6, because this anglec of rotation is fixed-direction,rotation pedicle nail 3 installation direction on vertebral body must be determined, therefore onrotation pedicle nail 3, on the U-shaped head of anail 31, is provided withdirection signs groove 314 and is distinguished.

As shown in Figure 2, after structure locking, fit completely inscrew 33 head ball-type parts 331 onrotation pedicle nail 3 and the ball-type hole 313 of the U-shaped head of anail 31 bottoms, after the arc groove 333 ofrod 2 andscrew 33 heads is fitted completely, coupling mechanism force is by land portions 331 contact conduction, but not conduct structure locking safety and reliability by the pin 32 onrotation pedicle nail 31.

Operational approach of the present invention comprises the steps:

1) determine the position of placing rotation pedicle nail according to the position of spinal trauma;

2) rotation pedicle nail is installed to vertebral body above by pedicle of vertebral arch, and the direction identification slot of two U-shaped heads of a nail of homonymy must be towards the opposite;

3), after rotation pedicle nail installs, rod is put into the U-shaped groove of two U-shaped heads of a nail; Plug screw is screwed into respectively in the different U-shaped heads of a nail;

4) tighten plug screw, the locking pressure that rod is subject to plug screw is exerted pressure to the screw head on rotation pedicle nail, because screw head is designed with the arc groove at oblique angle, make screw produce rotation, because this rotation is by pyramidal support, realize the reduction of the fracture, injured vertebral body recovers normal height.

Although above accompanying drawing and explanation have described the present invention in detail, these accompanying drawings and explanation should be considered to for explanation rather than be restricted in characteristic aspect.Should be understood that, that this only expresses and illustrated preferably embodiment, therefore claimed all changes and the modification falling in protection domain of the present invention.

Claims (5)

1. an internal fixing system capable of dilating wound of spinal column in self-rotation manner, by locking plug screw (1), rod (2), rotation pedicle nail (3) composition, described rotation pedicle nail (3) is by the U-shaped head of a nail (31), pin (32) and screw (33) composition, it is characterized in that: the described U-shaped head of a nail (31) bottom design has pin hole one (312) and ball-type hole (313), described rotation vertebrae nut nails on the U-shaped head of a nail (31) and is provided with direction signs groove (314), described screw (33) head is provided with pin hole two (332), ball-type part (331) and the arc groove with angle (333), the U-shaped head of a nail (31) bottom is provided with the deflection groove (311) with angle, described screw (33) can freely become fan-shaped angle swinging after being installed on the U-shaped head of a nail (31) by pin (32),

Deflection groove (311) angle of being with that the described U-shaped head of a nail (31) bottom is provided with is A angle and B angle sum, arc groove (333) angle of being with that described screw (33) head is provided with is C angle, and described A angle is more than or equal to C angle.

2. a kind of internal fixing system capable of dilating wound of spinal column in self-rotation manner according to claim 1, is characterized in that: the center superposition of the center of described pin hole one (312) and ball-type hole (313).

3. a kind of internal fixing system capable of dilating wound of spinal column in self-rotation manner according to claim 1, is characterized in that: the center of described pin hole two (332) should with the center superposition of ball-type part (331).

4. a kind of internal fixing system capable of dilating wound of spinal column in self-rotation manner according to claim 1, it is characterized in that: between described screw (33) and the U-shaped head of a nail (31), can freely rotate along pin (32) axle, screw axis slewing area is A angle and the B angle of the U-shaped head of a nail (31) bottom design.

5. a kind of internal fixing system capable of dilating wound of spinal column in self-rotation manner according to claim 1, it is characterized in that: the span of described A angle is 0 °～20 °, the span of described B angle is 0 °～20 °, and the span of described C angle is 0 °～20 °.

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