Summary of the invention
The purpose of the present invention is to provide a kind of repair of fractured bones systems, to overcome the deficiencies in the prior art described above.
To achieve the goals above, the invention provides the following technical scheme:
A kind of repair of fractured bones system, it is improved in that the system includes fracture board, bone cement screw, expansion instrumentAnd bone cement injector, wherein
The fracture board has prominent sleeve, the connection bone cement screw in the prominent sleeve, to keep describedThe stabilization of bone cement screw；
The bone cement screw includes rivet nut, axially through centre bore is equipped with inside the rivet nut, in the rivet nutOne end is equipped with bone cement diffusion hole, passes through the expansion instrument or the bone cement injector in the centre bore；The bone waterMud diffusion hole is connected with the centre bore, for spreading bone cement；
The front end of the expansion instrument is equipped with telescopic rod or elastic component, and the front end of the expansion instrument passes through the centre boreAnd go deep into inside cancellous bone, the rear end of the expansion instrument is strutted for controlling the front end by bulging one inside the cancellous boneA cavity；
The bone cement injector includes injecting handle and bone cement delivery pipe, the bone cement delivery pipe and the handleIt is detachably connected, the bone cement delivery pipe drives the bone cement for penetrating the centre bore, the handle motion of injectingBone cement flows in delivery pipe, and the bone cement is injected into the centre bore, and the bone cement is expanded by the bone cementHole is dissipated to enter in the cavity.
Preferably, in above-mentioned repair of fractured bones system, the prominent sleeve lining is equipped with screw thread, the bone cement screwIt uses and is threadedly coupled between the prominent sleeve.
Preferably, in above-mentioned repair of fractured bones system, one end of the rivet nut is cutting end, and the cutting end drives instituteBone cement screw is stated to squeeze into human body bone；The other end of the rivet nut be connecting pin, the connecting pin be equipped with external screw thread with it is describedProminent sleeve connection；
The central axis of the centre bore is overlapped with the central axis of the rivet nut；The bone cement diffusion hole be it is multiple simultaneouslyIt is distributed on the cutting end and is arranged around the central axis of the rivet nut.
Preferably, in above-mentioned repair of fractured bones system, on the connecting pin, in the centre bore be equipped with counterbore, instituteState counterbore mutually block with outer chucking device and, for keeping the rivet nut to stablize.
Preferably, in above-mentioned repair of fractured bones system, on the connecting pin, in the centre bore be equipped with internal screw thread,The internal screw thread is connect with outer chucking device, for keeping the rivet nut to stablize.
Preferably, in above-mentioned repair of fractured bones system, the prominent sleeve of the fracture board is inserted into the human body boneInterior, the bone cement screw is inserted into the prominent sleeve under the outer chucking device effect and is further inserted into the cancellous boneInterior, reserved section is arranged in the bone cement screw outside the prominent sleeve；
The front end of the expansion instrument is inserted into along the centre bore of the bone cement screw into the cancellous bone；It places the cutting end that the bone cement screw is stretched out in the front end；The front end struts or receives under the control of the rear endContracting, the front end strut after in the cancellous bone cavity described in bulging；
The bone cement screw squeezes into the reserved section in the prominent sleeve under the outer chucking device effect, instituteThe bone cement diffusion hole stated on cutting end is set in the cavity；
The bone cement injector extends along the centre bore, and the bone cement delivery pipe of the bone cement injector is insertedThe depth for entering the cancellous bone is identical as the depth of the bone cement diffusion hole.
Preferably, in above-mentioned repair of fractured bones system, the reserved segment length is equal to the cavity length, described reservedThe length of section is not more than the 1/2 of the rivet nut length.
Preferably, in above-mentioned repair of fractured bones system, the fracture board includes steel plate ontology, the steel plate ontology be withThe compatible arc of the human body bone shape；The thickness range of the steel plate ontology is between 4.0mm~4.5mm；The steel plateThe width range of ontology is between 12.5mm~13.5mm；Multiple fixation holes, the fixation hole are equipped in the steel plate ontologyInterior insertion screw is used to the steel plate ontology being fixed on the human body bone.
Preferably, in above-mentioned repair of fractured bones system, the prominent sleeve is set on the one side of the steel plate ontologyProtrude outward and extend 5mm-50mm, the diameter 14mm of the outer wall of the prominent sleeve；The section of the prominent sleeve is annulusShape, the circular ring shape with a thickness of 1.5mm-5.5mm；Angle model of the prominent sleeve between the one side of the steel plate ontologyIt encloses between 90 ° -135 °.
Preferably, in above-mentioned repair of fractured bones system, the cutting end is the screw cutting of shape of threads, the cutting spiral shellLine is equipped with screw thread sword, is equipped with self tapping slot in the front end of the screw thread sword.
Preferably, in above-mentioned repair of fractured bones system, the cutting end is spiral helicine cutting spiral, the cutting spiral shellIt screws on and is equipped with helical edges.
Preferably, in above-mentioned repair of fractured bones system, the cutting end be shape of threads first end of thread, described firstThe end of thread is equipped with screw thread sword；
The connecting pin is second end of thread of shape of threads, second end of thread and the prominent sleeve connection；
The screw pitch a of first end of thread is greater than the screw pitch b of second end of thread；
The ratio between the screw pitch a and the screw pitch b are 7:5.
Preferably, in above-mentioned repair of fractured bones system, the lateral surface of the rivet nut is periphery, edge on the peripheryThe central axis is equipped with anti-rotation plane；The diameter range of the periphery is between 8.5mm -12.5mm；The rivet nut is along itCentral axial direction length is between 20mm -120mm；The section of the centre bore is circle, and the circular diameter range existsBetween 2.6mm-4.5mm.
Preferably, in above-mentioned repair of fractured bones system, the quantity of the bone cement diffusion hole is 4-12, the bone waterMud diffusion hole is circular hole, and the diameter of the circular hole is 1mm-3mm；
The distance being circumferentially arranged between each bone cement diffusion hole along the cutting end is between 2.97mm -3mm；The distance being axially arranged between each bone cement diffusion hole along the cutting end is between 5mm -6mm.
Preferably, in above-mentioned repair of fractured bones system, the fracture board includes slide opening and through-hole, wherein the cunningHole is set to the lower end of the through-hole, to be multiple, are inserted into for screw and the fracture board is fixed on the human body bone；
The through-hole is set in the prominent sleeve, and the bone cement screw is passed through in the through-hole.
Compared with prior art, the invention has the following beneficial effects:
1. a kind of repair of fractured bones system provided by the invention, including bone cement screw 2 and expansion instrument 3, and bone waterMud snail nail 2 can be used in combination with expansion instrument 3, and sufficient space is provided for bone cement 6, reduces and pushes away inside phase cancellous boneThe pressure for infusing bone cement 6, reduces the risk of repair of fractured bones.
2. a kind of repair of fractured bones system provided by the invention comprising bone cement screw 2 have larger-diameter centerHole 24 is to guarantee that expansion instrument 3 can smoothly enter into centre bore 24.
3. a kind of repair of fractured bones system provided by the invention comprising bone cement screw 2 connecting pin without specialConnection screw thread design, i.e., the counterbore 26 that also can be used alone are connect with outer abduction equipment, keep its structure simpler, are operated more squareJust.
4. a kind of repair of fractured bones system provided by the invention comprising bone cement screw 2 compared to existing bone cementScrew, bone cement diffusion hole 25 thereon increase, and aperture becomes smaller, and are more suitable for injecting bone cement 6.
5. a kind of repair of fractured bones system provided by the invention comprising fracture board 1 compared to existing fracture board, haveSleeve 12 is protruded, is additionally provided with the through-hole 13 being relatively large in diameter inside the protrusion sleeve 12, which can pass through bone cement screw2, inside be additionally provided with screw thread, connect for the external screw thread 22 with the connecting pin of bone cement screw 2, for guaranteeing bone cement screw2 must be stable.
6. a kind of repair of fractured bones system provided by the invention comprising the setting of protrusion sleeve 12 that has of fracture board 1There are many angles, i.e., the angular range between prominent sleeve 12 and the one side of steel plate ontology 11 is between 90 ° -135 °, big modelThe angle setting enclosed ensure that the popularity that fracture board 1 is applied.
Specific embodiment
The present invention will be described in detail below with reference to the accompanying drawings and embodiments.The explanation of each example through the inventionMode, which provides, to be not intended to limit the present invention.In fact, those skilled in the art will be clear that, the scope of the present invention or essence are not being departed fromIn the case where mind, it can modify in the present invention and modification.For example, being illustrated or described as the spy of a part of one embodimentSign can be used for another embodiment, to generate another embodiment.Thus, it may be desirable to which the present invention includes to be included into appended powerSuch modifications and variations in the range of benefit requirement and its equivalent.
In the description of the present invention, term " longitudinal direction ", " transverse direction ", "upper", "lower", "front", "rear", "left", "right", " perpendicularDirectly ", the orientation or positional relationship of the instructions such as "horizontal", "top", "bottom" is to be based on the orientation or positional relationship shown in the drawings, and is onlyFor ease of description the present invention rather than require the present invention that must be constructed and operated in a specific orientation, therefore should not be understood as pairLimitation of the invention.Term used in the present invention " connected ", " connection " shall be understood in a broad sense, for example, it may be fixedly connected,It may be a detachable connection；It can be directly connected, can also be indirectly connected by intermediate member, for the common of this fieldFor technical staff, the concrete meaning of above-mentioned term can be understood as the case may be.
It as shown in Figure 1-Figure 3, is a kind of repair of fractured bones system provided by the invention.Wherein, Fig. 1 is repair of fractured bones systemStructural schematic diagram, Fig. 1 shows the expansion instruments 3 for being repair of fractured bones system, and cavity 5 is overhanged inside cancellous bone.What Fig. 2 was indicatedFor repair of fractured bones system expansion instrument 3 withdraw from bone cement screw 2 after, bone cement screw 2 outer chucking device effect under, into oneStep is squeezed into cavity 5.Fig. 3 expression is that the bone cement injector 4 of repair of fractured bones system injects bone water into the cavity 5 of cancellous boneMud 6.
Specifically, the present invention provides a kind of repair of fractured bones system, which includes fracture board 1, bone cement screw 2, expandsProp tool 3 and bone cement injector 4.Wherein, fracture board 1 has prominent sleeve 12, can connect bone water in prominent sleeve 12Mud snail nail 2, to keep the stabilization of bone cement screw 2.
It as shown in fig. 4-5, is the structural schematic diagram of the fracture board 1 of repair of fractured bones system provided by the invention.Wherein, scheme4 be the main view of fracture board 1；Fig. 5 is the side view of fracture board 1.Specifically, fracture board 1 includes steel plate ontology 11 and prominent setCylinder 12.Steel plate ontology 11 is arc panel, which is adapted that (specific arc shape is according to actually answering with the curve shape of human body boneIt is selected with the shape of middle fractured bones, the present embodiment is not especially limited this).Prominent sleeve 12 is set to the side of steel plate ontology 11(one side that steel plate ontology 11 is bonded with human body bone photo) protrudes outward and extends on face, extended distance range be 5mm-50mm itBetween, determines according to actual conditions, the present invention is not especially limited this to the specific need specifically extended.The outer wall of prominent sleeve 12 is straightDiameter is preferably 14mm；The section of prominent sleeve 12 is preferably circular ring shape, the circular ring shape with a thickness of 1.5mm-5.5mm；Prominent setAngular range between cylinder 12 and the one side of steel plate ontology 11 is between 90 ° -135 °.The thickness range of steel plate ontology 11 existsBetween 4.0mm~4.5mm；The width range of steel plate ontology 11 is between 12.5mm~13.5mm；It is equipped in steel plate ontology 11Multiple fixation holes 14, the interior insertion screw of fixation hole 14 are used to steel plate ontology 11 being fixed on human body bone.The quantity of fixation hole 14To be multiple, the quantity of specific fixation hole 14 need to select according to the actual situation, and the present invention is not especially limited this.
Further, fracture board 1 includes slide opening 15 and through-hole 13, wherein slide opening 15 is set to the lower end of through-hole 13, is used forScrew is inserted into and fracture board 1 is fixed on human body bone；Slide opening 15 and the difference of above-mentioned fixation hole 14 be, 14 edge of fixation holeThe surrounding of through-hole 13 is arranged, and the cross sectional shape of fixation hole 14 can be circle, can be ellipse, or round or ellipseIt is round.Slide opening 15 is set to the lower end of through-hole 13, and the central axis of general slide opening 15 and the central axis of through-hole 13 are same verticalOn line, and the cross sectional shape of slide opening 15 can be circle, can be ellipse, or round or ellipse.Slide opening 15Quantity be it is multiple, in the present embodiment preferably, the quantity of slide opening 15 is 4.The quantity of specific slide opening 15 is also in other embodimentsIt need to select according to the actual situation, the present invention is not especially limited this.
Further, through-hole 13 is set in prominent sleeve 12, and bone cement screw 2, i.e. through-hole 13 can be passed through in through-hole 13Diameter is equal with the overall diameter of bone cement screw 2 or overall diameter slightly larger than cement screw 2.In being provided with spiral shell in through-hole 13Line, the screw thread are further ensured that bone cement for matching with the external screw thread 22 on the 21 excircle top of rivet nut of bone cement screw 2Screw 2 is stablized in prominent sleeve 12.
In practical application, medical staff needs to drill out aperture using hand drill on the bone of human fracture, then will be with boneThe compatible fracture board 1 of folding bone shape fits with fractured bones, at this time the arc curve and human body of the steel plate ontology 11 of fracture board 1The arc curve of bone is adapted, and the outer wall shape of prominent sleeve 12 is adapted with hole shape of the hand drill on human body bone.It is preferred thatThe outer wall on ground, prominent sleeve 12 is smooth, and in order to be inserted into aperture, prominent 12 inner wall of sleeve passes through screw thread and bone cement screw 2Connection.
It is the structural schematic diagram of the bone cement screw 2 of repair of fractured bones system provided by the invention as shown in Fig. 6-Fig. 9.It shouldBone cement screw 2 can be closed with expansion instrument knot 3 and be used.Wherein, it is illustrated in figure 6 a kind of repair of fractured bones system provided by the inventionIn, the structural schematic diagram of the bone cement screw 2 suitable for humerus and femur etc..Fig. 7 show a kind of fracture provided by the inventionIn repair system, the structural schematic diagram of the bone cement screw 2 suitable for shin bone.Fig. 8 show a kind of fracture provided by the inventionIn repair system, bone cement screw 2, the also referred to as structural schematic diagram of hollow nail.Fig. 9 show a kind of fracture provided by the invention and repairsStructural schematic diagram in complex system, suitable for the bone cement screw being used in combination with expansion instrument on femur inside-fixture.
In a kind of repair of fractured bones system provided by the invention, bone cement screw 2 can be used in combination with expansion instrument 3, the boneCement screw 2 includes rivet nut 21, centre bore 24 and bone cement diffusion hole 25, wherein one end of rivet nut 21 is cutting end, cuttingIt holds the front end as screw that can directly contact with fractured bones and screw is driven to squeeze into inside bone；The other end of rivet nut 21 is connectionThe periphery at end, connecting pin has external screw thread 22, and external screw thread 22 can be used to and the threaded connection inside above-mentioned protrusion sleeve 12；InOn the connecting pin of rivet nut 21, counterbore 26 is equipped in centre bore 24.In in the lower end of counterbore 26, centre bore 26 be equipped with internal screw thread 23,Internal screw thread 23 can be connect with outer chucking device, such as can be connect with handle, for holding the stabilization of rivet nut 21.Centre bore 24It is interior to be passed through for bone cement injector 4 or expansion instrument 3.
Further, above-mentioned bone cement screw 2 can have above-mentioned internal screw thread 23, can also only pass through counterbore 26The stability of connection is connect and guaranteed with required outer chucking device.
Centre bore 24 is set to the inside of rivet nut 1 and runs through rivet nut 21, the central axis of centre bore 24 and the center of rivet nut 21Axis is overlapped.The section of centre bore 24 can be circle, and between 2.6mm-4.5mm, specific size needs circular diameter rangeIt specifically to be adjusted in conjunction with practical application, the present invention is not especially limited this.
Bone cement diffusion hole 25 is to communicate on cutting ends that are multiple and being distributed in rivet nut 21 and with centre bore 24.
The quantity of bone cement diffusion hole 25 can be 4-12, and specific number needs that practical application is combined specifically to adjust, thisInvention is not especially limited this.
Bone cement diffusion hole 25 can be circular hole, and the diameter of circular hole can be 1mm-3mm, and specific size needs to combine practicalUsing specific adjustment, the present invention is not especially limited this.
Bone cement diffusion hole 25 is arranged along the cutting end of rivet nut 1 around the central axis of rivet nut 1.It is specifically as follows, it is eachBetween bone cement diffusion hole 25 along the cutting end of rivet nut 1 circumferential direction (along the lateral surface of rivet nut 21) be arranged distance can beBetween 2.97mm-3mm, the axial direction between each bone cement diffusion hole 25 along the cutting end of rivet nut 21 is (along the central axis of rivet nut 1Direction) setting distance can be between 5mm-6mm.
Specifically, the cutting end of rivet nut 21 is the screw cutting 27 of shape of threads, and screw cutting 27 is equipped with screw thread sword, in spiral shellThe front end of line sword is equipped with self tapping slot.
As Figure 6-Figure 7, the cutting end of rivet nut 21 is the screw cutting 27 of shape of threads, and screw cutting 27 is equipped with screw threadSword is equipped with self tapping slot in the front end of screw thread sword.Around the connecting pin of rivet nut 21 have external screw thread 22, external screw thread 22 can be used toScrew thread inside the protrusion sleeve 12 of above-mentioned fracture board 1 is in mating connection, to keep the stabilization of rivet nut 21；In the company of rivet nut 21It connects to hold and is equipped with counterbore 26 in upper, centre bore 24.In being equipped with internal screw thread 23 in the lower end of counterbore 26, centre bore 26, internal screw thread 23 canTo be connect with outer chucking device, to guarantee the stability of connection.
Further, the front end of the expansion instrument 3 of repair of fractured bones system provided by the invention is equipped with telescopic rod or elastic component,Such as can be telescopic sacculus, the overall diameter of expansion instrument 3 is slightly less than the interior diameter of the centre bore 24 of bone cement screw 2.The front end of expansion instrument 3 passes through centre bore 24 and gos deep into inside cancellous bone, and the rear end of expansion instrument 3 has operable push rod,The push rod is strutted for controlling front end by one cavity of bulging inside the cancellous bone.
Further, the bone cement injector 4 of repair of fractured bones system provided by the invention includes injecting handle and bone cementDelivery pipe, bone cement delivery pipe are removably connect with handle.Bone cement delivery pipe is used for inside penetrating into center hole 24, diameterIt is slightly less than the interior diameter of centre bore 24；Injecting handle can be the screw rod with spiral, can band while injecting handle motionBone cement flowing, i.e., flow out, and push away into centre bore 24 out of bone cement delivery pipe in the dynamic bone cement delivery pipe being attached theretoBone cement 6 is infused, bone cement 6 is entered by bone cement diffusion hole 25 in the cavity 5 of cancellous bone.
In practical applications, the repair of fractured bones that bone cement screw 2 as shown in FIG. 6 can be used for humerus or femur etc. is fixed.Specifically, the cutting end of rivet nut 21 needs fixed position to contact as front end and humerus or femur when using；The connection of rivet nut 21The internal screw thread 23 at end is connect with outer chucking device, and band moving nail body 21 rotates under the action of outer chucking device, at this time rivet nut 21Cutting end can screw in the fixed position that needs of humerus or femur, and enter in bone with moving nail body 21, rivet nut 21 is squeezed into bone by first choiceIt is interior, be about 20mm into depth, by the hole of centre bore 24 insertion expansion instrument 3, expansion instrument 3 for example can for sacculus orOther expanse systems.By sacculus or other augmentation systems, after centre bore 24, it is to balloon-expandable or other expansionsContrast agent (whole process is completed under perspective environment) is injected in system, sacculus or other augmentation systems, in the effect of contrast agentUnder expanded in femoral head humerus head or tibial plateau, the reset of the reduction of the fracture, especially articular surface is assisted, and sparseA cavity out and under fluoroscopy confirmation completion are expanded in cancellous bone.Then the radiography in sacculus or other augmentation systems is extracted outAgent, sacculus or other augmentation systems withdraw from sacculus or other augmentation systems, then rivet nut 21 are driven into predetermined depth after contraction.It modulates bone cement and (modulates the dosage of bone cement 6, the bone cement modulated in advance according to the actual conditions at degree of fracture and position6 are pushed into storage in bone cement delivery pipe by the equipment such as syringe in vitro), after slid into injecting handle for bone cement,And position is maintained until bone cement 6 firmly admittedly, that is, is withdrawn from after forming the internal fixation system of the reinforcement of bone cement 6.
Compared with prior art, present invention uses balloon-expandable or other augmentation systems, solid to needing to reinforce firstFixed fracture site is expanded, and the reset of fracture is on the one hand conducive to, on the other hand also can be with for final fixed be madeThe bone internal cavity of low pressure push-in bone cement.First the rivet nut of bone cement screw 21 is not got into appropriate depth when operation, but stayedIt stops after throwing a greater part of rivet nut 21 after the length of good balloon-expandable or other augmentation systems into, the rivet nut through this bone cement screw21 reeve hand drills to appropriate depth (depth specifically determines according to required human body bony site to be treated, the present embodiment to this notLimit) backed off after random hand drill, then fracture site is expanded with balloon-expandable or other augmentation systems, form bone internal cavityWhile, also have the function that assist the reduction of the fracture.
The repair of fractured bones that a kind of bone cement screw 2 as shown in Figure 7 can be used for shin bone is fixed.Its specific structure and specificApplication method is consistent with a kind of bone cement screw being used in combination with expansion instrument shown in above-mentioned Fig. 6, does not do herein superfluousIt states.The axial dimension (along the length of the central axis of centre bore 24) of bone cement screw shown in Fig. 7 is greater than unlike uniqueThe axial dimension of bone cement screw 2 shown in Fig. 6.
A kind of bone cement screw 2 as shown in Figure 8 namely hollow nail.Bone cement in its structure and above-mentioned Fig. 6-Fig. 72 other structures of screw are consistent, the difference is that the cutting end of rivet nut 21 is first end of thread 28 of shape of threads, first end of thread28 are equipped with screw thread sword, and first end of thread 28 needs fixed position to contact as front end and fractured bones；The connecting pin of rivet nut 21 isSecond end of thread 29 of shape of threads, second end of thread 29 can be used for being connected with the screw thread in the protrusion sleeve 12 of above-mentioned fracture board 1It connects.And the screw pitch a of first end of thread 28 of the hollow nail is greater than the screw pitch b of second end of thread 29；Screw pitch a is greater than second end of thread29 screw pitch b when in use, rotates equal angular, and first end of thread 28 is greater than entering deeply for second end of thread 29 into depthDegree can play the fixed function that further furthers to fractured bones.Preferably, the ratio between screw pitch a and screw pitch b be 5:7, screw pitch a andThe specific size of screw pitch b can also combine practical application specifically to adjust as needed, and the present invention is not especially limited this.In realityIn, specifically used method is consistent with the application method of bone cement screw described in above-mentioned two sections, and this will not be repeated here.
A kind of bone cement screw 2 as shown in Figure 9 is suitable on femur inside-fixture.Its structure and above-mentioned Fig. 6-Fig. 7In 2 other structures of bone cement screw it is consistent, the difference is that the cutting end of rivet nut 21 be spiral helicine cutting spiral 210,It cuts spiral 210 and is equipped with helical edges, cutting spiral 210 is contacted as front end with fractured bones, is distributed in cutting spiral 210Multiple bone cement diffusion holes 25 are used for bone cement diffusion.Excircle in the connecting pin of rivet nut 21 is equipped with anti-rotation plane211, stablize when for guaranteeing that rivet nut 21 is connect with for example prominent sleeve 12, without being rotated along center axis thereof.
In practical applications, specifically used method is consistent with the application method of above-mentioned bone cement screw, does not do hereinIt repeats.
Preferably, self tapping slot is 23 sword self tapping slots.
Preferably, the lateral surface of rivet nut 21 is periphery, and it is flat along the central axis of centre bore 24 to be equipped with anti-rotation on peripheryFace；The diameter range of periphery is between 8.5mm -12.5mm, preferably 12.5mm.
Preferably, rivet nut 21 is along center axis thereof direction length between 20mm -120mm.
Below with reference to practical application, a kind of repair of fractured bones system provided by the invention is described further.
In practical applications, as shown in Figure 1-Figure 3, such as patients with fractures, medical staff first can be according to specific position of fracturingIt sets, selects corresponding fracture board 1 and bone cement screw 2.Medical staff can hold hand drill and drill out aperture in fractured bones, at this time will fractureThe protrusion sleeve 12 of plate 1 is inserted into aperture.It is connect using outer chucking device, such as handle with the internal screw thread 23 of bone cement screw 2Afterwards, medical staff holds handle and bone cement screw 2 is passed through the prominent insertion of sleeve 12 or is screwed in human body bone, until bone cement spiral shellThere are about 1/2 length to enter in human body bone for nail 2, i.e., reserved section is arranged in the external of prominent sleeve 12.
And then, the insertion of centre bore 24 by the front end (for sacculus) for expanding instrument 3 along bone cement screw 2 (is expanded at this timeThe front end of instrument 3 is contraction state), until the cutting end of bone cement screw 2 is stretched out in the front end of expansion instrument 3 and enters cancellous boneBehind inside, 3 stop motion of instrument is expanded.At this point, the rear end of operation expansion instrument 3, to ball intracapsular injection contrast agent, in contrast agentUnder effect, while balloon expandable can inside cancellous bone one cavity 5 of bulging.After cavity 5 is stablized, operation expansion instrument3 rear end extracts the contrast agent in sacculus out, and it is in reset condition that sacculus, which is shunk, at this time, can withdraw from expansion instrument 3.
Then, the reserved section of bone cement screw 2 is all squeezed into human body bone under the effect of outer chucking device, i.e., by bone waterThe cutting end of mud snail nail 2 is squeezed into the cavity 5 of cancellous bone, gos deep into the bone cement diffusion hole 25 of cutting end all in cavity 5, thisWhen bone cement screw 2 rivet nut 21 fully enter in human body bone, the spiral shell inside the external screw thread 22 of connecting pin and prominent sleeve 12Line is connected.At this point, bone cement injector 4 is injected handle and bone cement delivery pipe (interior full of bone cement 6) connection, by boneCement pipe is along the insertion of centre bore 24 until the front end of bone cement delivery pipe is deep into the position of bone cement diffusion hole 25, stoppingIt is forwardly inserted bone cement injector 4.At this point, handle motion is injected in operation, injects handle motion while driving bone cement delivery pipeInterior bone cement 6 flows out, and into centre bore 24, as bone cement 6 flows out more and more, bone cement 6 is along bone cement diffusion hole 25It flows into inside the cavity 5 in cancellous bone, after the bone cement 6 in a bone cement delivery pipe is all released, replaces another simply continue toIt injects, until cavity 5 stops injecting bone cement 6 after being filled up by bone cement 6, and maintains position until bone cement 6 firmly admittedly, that is, is formedBone cement injector 4 is withdrawn from after the internal fixation system that bone cement 6 is reinforced.
So far, a bone fracture fixation system job is completed.
To sum up compared with prior art, the invention has the following beneficial effects:
1. a kind of repair of fractured bones system provided by the invention, including bone cement screw 2 and expansion instrument 3, and bone waterMud snail nail 2 can be used in combination with expansion instrument 3, and sufficient space is provided for bone cement 6, reduces and pushes away inside phase cancellous boneThe pressure for infusing bone cement 6, reduces the risk of repair of fractured bones.
2. a kind of repair of fractured bones system provided by the invention comprising bone cement screw 2 have larger-diameter centerHole 24 is to guarantee that expansion instrument 3 can smoothly enter into centre bore 24.
3. a kind of repair of fractured bones system provided by the invention comprising bone cement screw 2 connecting pin without specialConnection screw thread design, i.e., the counterbore 26 that also can be used alone are connect with outer abduction equipment, keep its structure simpler, are operated more squareJust.
4. a kind of repair of fractured bones system provided by the invention comprising bone cement screw 2 compared to existing bone cementScrew, bone cement diffusion hole 25 thereon increase, and aperture becomes smaller, and are more suitable for injecting bone cement 6.
5. a kind of repair of fractured bones system provided by the invention comprising fracture board 1 compared to existing fracture board, haveSleeve 12 is protruded, is additionally provided with the through-hole 13 being relatively large in diameter inside the protrusion sleeve 12, which can pass through bone cement screw2, inside be additionally provided with screw thread, connect for the external screw thread 22 with the connecting pin of bone cement screw 2, for guaranteeing bone cement screw2 must be stable.
6. a kind of repair of fractured bones system provided by the invention comprising the setting of protrusion sleeve 12 that has of fracture board 1There are many angles, i.e., the angular range between prominent sleeve 12 and the one side of steel plate ontology 11 is between 90 ° -135 °, big modelThe angle setting enclosed ensure that the popularity that fracture board 1 is applied.
The above is only a preferred embodiment of the present invention, is not intended to restrict the invention, and comes for those skilled in the artIt says, the invention may be variously modified and varied.All within the spirits and principles of the present invention, made any modification, equivalentReplacement, improvement etc., should all be included in the protection scope of the present invention.