CN109771106B - Anterior atlantoaxial lateral mass joint reduction fusion cage system and application method thereof - Google Patents
Anterior atlantoaxial lateral mass joint reduction fusion cage system and application method thereof Download PDFInfo
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- CN109771106B CN109771106B CN201910188603.1A CN201910188603A CN109771106B CN 109771106 B CN109771106 B CN 109771106B CN 201910188603 A CN201910188603 A CN 201910188603A CN 109771106 B CN109771106 B CN 109771106B
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Abstract
The invention discloses an anterior atlantoaxial lateral mass joint reduction fusion device system and a use method thereof, the system comprises a fusion fixing device, a holding reduction device and a lifting reduction forceps, the fusion fixing device is provided with a first connecting part, the holding reduction device is provided with a second connecting part, the fusion fixing device is connected with the holding reduction device through the first connecting part and the second connecting part, the lifting reduction forceps at least comprise a first conduction part and a second conduction part, the holding reduction forceps are positioned between the first conduction part and the second conduction part, the system is used for atlantoaxial dislocation and cranium depression operation, and the system can be used for ideal anterior atlantoaxial decompression reduction and fusion internal fixation operation only by one operation incision.
Description
Technical Field
The invention relates to the field of medical equipment, in particular to an anterior atlantoaxial lateral mass joint reduction fusion cage system through an oral route and a use method thereof.
Background
Abnormal normal involution of the atlantoaxial is caused by upper cervical vertebra diseases such as atlantoaxial dislocation, cranium and base depression, and high paraplegia and even death caused by high cervical spinal marrow compression can be caused by atlantoaxial dislocation or instability. For this case, the existing treatment regimen is: firstly, the anterior atlantoaxial decompression and posterior internal fixation fusion operation is carried out through the oropharynx; secondly, an atlantoaxial fusion internal fixation operation is carried out by oropharyngeal decompression, in the two treatment schemes, after the two lateral mass joints of the atlantoaxial are loosened, the atlantoaxial is lifted forward and downward or pushed and pulled backward and upward for reduction to achieve the cervical spinal ventral decompression effect, and the lateral mass joints are conventionally implanted into autologous ilium for fusion (with/without posterior atlantoaxial bone grafting fusion);
However, the two treatment schemes have the defects that the anterior atlantoaxial decompression and posterior internal fixation fusion operation requires two incisions on the anterior side and the posterior side of the atlantoaxial during operation, the patient needs general anesthesia during operation, after the atlantoaxial decompression during operation in general anesthesia state, the atlantoaxial is in an extremely unstable state, and the possibility of high paraplegia and even death caused by cervical spinal cord injury is increased by changing the posture; the oral cavity operation field is narrow, no suitable fusion device and tool for the atlantoaxial fusion are clinically available at present, and the operation is difficult and complicated.
Disclosure of Invention
The invention aims to provide an atlantoaxial lateral mass joint reduction fusion cage system for oral anterior approach operation and a use method thereof, wherein the system is used for atlantoaxial dislocation and cranium base depression.
The technical scheme is as follows:
the invention discloses an anterior atlantoaxial lateral mass joint reduction fusion device system which comprises a fusion fixing device, a holding restorer and a lifting restorer, wherein a first connecting part is arranged on the fusion fixing device, a second connecting part is arranged on the holding restorer, the fusion fixing device is connected with the holding restorer through the first connecting part and the second connecting part, the lifting restorer at least comprises a first conducting part and a second conducting part, and the holding restorer is positioned between the first conducting part and the second conducting part.
The fusion fixing device comprises a first fusion device, a first cavity which is penetrated up and down is formed in the first fusion device, anti-slip protrusions are arranged on the upper surface and the lower surface of the first fusion device, the first fusion device is provided with a front side plate and a rear side plate, the lower side edge of the front side plate inclines towards the direction of the rear side plate relative to the upper side edge of the front side plate, a first fixing hole which penetrates through the front side plate is formed in the front side plate, the first fixing hole extends from the front side of the front side plate to the obliquely upper side of the rear side of the front side plate, the inner diameter of the first fixing hole is gradually narrowed in the extending process, internal threads are arranged in the first fixing hole, and the first connecting part is located on the front side plate.
The fusion fixing device further comprises a first bone fracture plate, the first bone fracture plate is connected with the front side plate of the first fusion device and is located below the first fusion device, at least a second fixing hole and a third fixing hole which penetrate through the front surface and the rear surface of the first bone fracture plate are formed in the first bone fracture plate, a first blocking plate is arranged between the second fixing hole and the third fixing hole, the first blocking plate is rotationally hinged with the first bone fracture plate, the inner side of the second fixing hole is a smooth arc surface, and the inner diameter of the second fixing hole gradually narrows in the direction from the front surface to the rear surface of the first bone fracture plate.
The fusion fixing device further comprises a second bone fracture plate, the second bone fracture plate is connected with the front side plate of the first fusion device and located below the first fusion device, and fourth fixing holes penetrating through the front surface and the rear surface of the second bone fracture plate are formed in the second bone fracture plate.
The fusion fixing device further comprises a third bone plate, the third bone plate is located at the front side of the first fusion device, the first fusion device and the third bone plate are of a split structure, the third bone plate is of a Z-shaped structure, at least a fifth fixing hole, a sixth fixing hole and a seventh fixing hole which penetrate through the third bone plate from front to back are formed in the third bone plate, the fifth fixing hole is located at the upper portion of the third bone plate, the sixth fixing hole and the seventh fixing hole are located at the lower portion of the third bone plate, the inner side of the sixth fixing hole is of a smooth arc surface, the inner diameter of the sixth fixing hole is gradually narrowed in the direction from the front side to the rear side of the third bone plate, and a second blocking plate is arranged between the sixth fixing hole and the seventh fixing hole.
The holding restorer comprises a holding inner rod, a resetting sleeve and a resetting transverse hook rod, wherein the resetting sleeve is movably sleeved on the holding inner rod, the resetting transverse hook rod is movably arranged on the holding inner rod, the resetting transverse hook rod is positioned above the resetting sleeve, a rotating handle is fixed at the top of the holding inner rod, a first external thread is arranged on the upper part of the holding inner rod, a first internal thread matched with the first external thread is arranged at a corresponding position on the resetting sleeve, a second internal thread matched with the first external thread is arranged on a contact surface of the resetting transverse hook rod, and the second connecting part is positioned at the bottom of the holding inner rod.
A baffle plate is arranged on the reset sleeve, one end of the baffle plate is connected with the bottom of the reset sleeve, the other end of the baffle plate extends obliquely upwards away from the bottom of the reset sleeve, and a fixing protrusion is arranged at the bottom of the baffle plate; the reset transverse hook rod is provided with a blocking hook piece, and the bottom of the blocking hook piece is fixed on the upper surface of the reset transverse hook piece.
The lifting reset pliers further comprise a clamping part, a first handheld part, a second handheld part and a clamping part, wherein the first conducting part is connected with the first handheld part, the second conducting part is connected with the second handheld part, the joint of the first conducting part and the first handheld part is hinged with the joint of the second conducting part and the second handheld part, the first conducting part is of an arc-shaped structure which is far away from the second conducting part and is sunken in the direction, the second conducting part is of an arc-shaped structure which is far away from the first conducting part and is sunken in the direction, the clamping part comprises a first clamping rod and a second clamping rod, the first clamping rod is connected with the first conducting part, the second clamping rod is connected with the second conducting part, one end of the clamping part is located on the second handheld part, the other end of the clamping part penetrates through the first handheld part, a plurality of first clamping buckles are arranged on the clamping part, and a plurality of first clamping buckles are arranged on corresponding positions on the first handheld part and are matched with the first clamping buckles.
The die testing device comprises a handle, a conductive rod and a die testing head, wherein the handle is connected with one end of the conductive rod, the die testing head is connected with the other end of the conductive rod, the die testing head is at least provided with a first side face, a second side face and a third side face, the first side face and the second side face are oppositely arranged, the height of the first side face is higher than that of the second side face, the first side face is connected with the second side face, the joint of the first side face and the second side face adopts convex arc smooth transition, the first side face and the second side face are connected with the third side face, the third side face is connected with the conductive rod, a third blocking plate is arranged on the third side face, and the third blocking plate protrudes towards one side of the second side face.
The invention also discloses a method for using the anterior atlantoaxial lateral mass joint reduction fusion cage system, which comprises the following steps:
the fusion fixing device is connected with the holding restorer through a first connecting part and a second connecting part;
the reposition device is held at the front side of the oral cavity to drive the fusion fixing device to be placed between the atlas and the axial;
the front side of the oral cavity clamps the lifting and resetting forceps to clamp the pivotes the cortex of bone on both sides of the dentate process or the residual end of the dentate process;
The handle reset device is reversely rotated, the handle reset device drives the lifting reset forceps to move upwards in the upward moving process, the lifting reset forceps lift and drive the pivot to reset forwards and upwards, and simultaneously, when the handle reset device is reversely rotated, the holding reset device is contacted with the front of the atlas lateral mass, and when the holding reset device drives the lifting reset forceps to move, the lifting reset forceps apply a reverse acting force to the holding reset device, and the reverse acting force acts on the holding reset device so as to further reset the atlantoaxial forwards and backwards.
It should be noted that:
the foregoing "first, second, third …" is merely for distinguishing between names and not necessarily for representing a particular number or order.
The advantages and principles of the invention are described below:
1. the fusion fixing device is connected with the holding restorer, the fusion fixing device is placed between the atlas and the epistropheus through the holding restorer in the oral cavity, simultaneously, the bottom of the holding restorer clamps the epistrophus dentate process or the two sides of the epistrophus bone cortex through the oral cavity, after the holding restorer holds the inner rod through the reverse rotation, the holding restorer holds the inner rod to move upwards, the holding restorer holds the inner rod to drive the reset cross-hook rod to move upwards in the moving process, the reset cross-hook rod hooks the first conduction part or the second conduction part of the lifting restorer, the lifting restorer is driven to restore the epistrophus through the clamping part of the lifting restorer, simultaneously, the lifting restorer applies a reaction force to the holding restorer through the reset cross-hook rod in the moving process, the inner and outer threads of the holding restorer hold the screw hole bottom baffle of the restorer to push the side block backwards, the atlas are restored, then the atlas is prevented from being cut down to be damaged by the upper side plate in front of the fusion fixing device, the upper side plate is matched with the epistrophus, the upper side plate is cut into the lower side of the human body, and the operation can be carried out by the upper cervical vertebra, and the operation can be carried out by the operation system, and the patient can be prevented from being damaged by the patient, and the patient can be prevented from being damaged by the operation, and the patient can be easily and the operation can be easily cut by the operation is prevented.
2. The first fusion device of the fusion fixing device is formed by 3D printing, a first cavity on the first fusion device is used for being implanted into a human body autologous bone or allogeneic bone, and after the first fusion device is implanted into a human body, the human body autologous bone or allogeneic bone and the atlantoaxial lateral mass joint form osseous fusion, so that the stability of fusion between the first fusion device and the atlantoaxial lateral mass joint is improved; the upper surface and the lower surface of the first fusion device are provided with anti-skidding bulges, and after the first fusion device is implanted to prop open the atlantoaxial lateral mass joint, the first fusion device and the atlantoaxial lateral mass joint can be prevented from being displaced or misplaced.
3. The first fixing hole on the first fusion device extends from the front side of the front side plate to the upper inclined side of the rear side of the front side plate, the inner diameter of the first fixing hole is gradually narrowed in the extending process, the first fusion device and the atlas can be fixed into a whole by nailing the locking screw into the first fixing hole, and the screw can be prevented from being screwed into the fusion device or being loosened backwards when being too far removed.
4. The first bone fracture plate is located below the first fusion device and is connected with the first fusion device, screws are nailed into the second fixing holes and the third fixing holes of the first bone fracture plate, so that the first bone fracture plate and the dentata can be fixed, the purpose of integrating and fixing the first fusion device with the atlas and the dentata is achieved, the first blocking plate between the second fixing holes and the third fixing holes is used for blocking the screws in the second fixing holes and the third fixing holes, and the screws in the second fixing holes and the third fixing holes are prevented from falling off.
5. The inside of the second fixing hole is a smooth arc surface, the inside diameter of the second fixing hole gradually narrows from the front surface to the rear surface of the first bone fracture plate, after the lag screw is implanted in the second fixing hole, the screw needle inserting direction can be adjusted to a certain extent according to the running of the pivot vertebral body and the vertebral artery, the screw inserting operation is convenient, the screw inserting safety is further ensured, the possibility of damaging the cervical spinal cord and the vertebral artery is reduced, on the other hand, the inside diameter of the second fixing hole gradually narrows in the screwing process of the screw is reduced, the inside of the second fixing hole is a smooth arc surface, after the screw is placed in the second fixing hole, the screw is limited in the second fixing hole due to no matching internal thread, the screw cannot continue to extend into the pivot vertebral body in the horizontal direction, and if the screw is continuously screwed, the pivot is pulled forward to be closely attached to the bone fracture plate in the opposite direction, so that the further resetting effect is achieved.
6. When the centrum of the centrum is short and small and two screws cannot be placed in the longitudinal direction, the shape of the bone plate connected with the first fusion device is changed, the bone fracture plate is provided with a second bone fracture plate which is short and small, the second bone fracture plate is provided with a fourth fixing hole, and the first fusion device is fixed with the pivotal phase by driving a screw into the fourth fixing hole.
7. When the oral cavity of a patient is narrow, the skull base deformity and the atlas dislocation are serious and cannot be reset perfectly, and the integrated fusion device after the first fusion device is connected with the bone fracture plate is difficult to put due to serious local structural deformation or other reasons, the first fusion device and the third bone fracture plate are designed into a split type, the first fusion device is small in size, the visual field is blocked when the first fusion device is put into the patient, the first fusion device is convenient to put into the patient, and after the first fusion device is put into the patient, the third bone fracture plate is put into the patient, and the third bone fracture plate is fixed with the atlas and the axis.
8. The third bone plate is of a Z-shaped structure, the Z-shaped structure is designed according to the characteristics of the anatomical structure in front of the atlantoaxial, so that the third bone plate is better fixed with the atlantoaxial and the axial, and the fixed third bone plate is closer to the bone surface;
a fifth fixing hole at the upper part of the third bone fracture plate is internally provided with an inner thread which is obliquely outwards upwards, and a locking screw can be arranged in the fifth fixing hole to fix the third bone fracture plate and the atlantoaxial, and the locking screw is hinged with the inner thread to prevent the screw from loosening; the inner diameter of the sixth fixing hole is gradually narrowed, the inner side of the sixth fixing hole is a smooth arc surface, the entering direction of the screw can be adjusted when the screw is arranged in the sixth fixing hole, the screw arranging operation is convenient, the screw cannot continuously enter deeply into the pivot when the tail of the screw is contacted with the sixth fixing hole, if the screw is continuously screwed, the pivot can be pulled forward to cling to the bone plate in the opposite direction, the effect of further resetting is achieved, and the third bone plate can be further fixed with the pivot after the locking screw is arranged in the seventh fixing hole.
9. And the second blocking plate is used for blocking the screws in the sixth fixing hole and the seventh fixing hole and preventing the screws in the sixth fixing hole and the seventh fixing hole from falling off.
10. The holding inner rod of the holding restorer is provided with a rotating handle, the holding inner rod can be rotated through the rotating handle, the restoring sleeve is movably sleeved on the holding inner rod, a first external thread on the holding inner rod is matched with a first internal thread on the restoring sleeve, the restoring sleeve is pushed downwards and backwards by the direction of reaction force when the holding inner rod is retreated upwards, and the blocking piece at the bottom of the restoring sleeve blocks the front of the atlas side block, so that the reaction force can push the atlas backwards through the blocking piece of the restoring sleeve to play a restoring role, the restoring cross hook rod is positioned on the holding inner rod and above the restoring sleeve, the holding inner rod moves upwards through the reverse rotation to drive the restoring cross hook rod to move upwards, the restoring cross hook rod hooks the lifting restoring forceps in the upward moving process, and the lifting restoring forceps move upwards, and the lifting forceps lift and pull the atlas through the clamping part in the upward moving process to play a role of further restoring the atlas.
11. The reset transverse hook rod is provided with a blocking hook piece, and in the moving process of the reset transverse hook rod, the blocking hook piece hooks the lifting reset pliers, so that the lifting reset pliers are driven to move.
12. The reset sleeve bottom is provided with the separation blade, and the separation blade bottom is equipped with fixed arch, when holding the reset ware and pressing to first fusion ware preceding curb plate and atlas side piece place ahead cortical bone looks at ordinary times, the separation blade of reset sleeve bottom and atlas side piece place ahead cortical bone contact, when holding the twist grip of interior pole again, because the existence of reset sleeve bottom separation blade, can restrict first fusion ware and put into too deeply, and the separation blade bottom is equipped with fixed arch's existence, can nail into the anterior cortical bone of atlas side piece and play the fixed effect of interim antiskid.
13. The first clamping part and the second clamping part of the lifting reset forceps are used for clamping the two sides of the dentate process or the dentate stump of the pivotal vertebra, lifting reset is carried out on the pivotal vertebra, meanwhile, the first clamping part and the second clamping part can avoid cervical spinal marrow damage caused by slipping out of hands when the pivotal vertebra is lifted, the design of the first conduction part and the second conduction part can avoid the shielding of the visual field above the oral cavity operation field during operation, and the clamping part on the lifting reset forceps can prevent the first hand holding part and the second hand holding part from loosening.
14. Before the fusion fixing device is put into a human body, the mold testers with different sizes can be put between the atlas and the axis, the most suitable mold testers are selected, then the first fusion device with the proper size is selected according to the sizes of the mold testers, the first fusion device between the atlas and the axis is prevented from being unsuitable in size, and meanwhile, the mold testers with different sizes can gradually prop open the atlantoaxial side block joint gap after the atlantoaxial gap is loosened and reset, so that the effects of further loosening and resetting are achieved.
15. The junction of the first side and the second side of the test die head of the test die device adopts the convex arc smooth transition, so that the test die device is convenient to drive into the atlantoaxial lateral mass joint, the third baffle plate on the test die device can prevent the test die head from being driven into too deep to damage the cervical spinal cord, and simultaneously the test die device can use the third baffle plate as a fulcrum to pry and dial through the handle and the conducting rod, so that the atlantoaxial is further reset.
Drawings
FIG. 1 is a schematic view of a first embodiment of the present invention;
FIG. 2 is a diagram of the operation of a first embodiment of the present invention;
FIG. 3 is a schematic view of the structure of a fusion-fixing device according to a first embodiment of the present invention;
FIG. 4 is a schematic view showing the structure of a first cage according to a first embodiment of the present invention;
FIG. 5 is a schematic view showing a combination of a holding and repositioning device and a fusion fastening device according to a first embodiment of the present invention;
Fig. 6 is an exploded view of a holding reducer according to a first embodiment of the present invention;
fig. 7 is a schematic structural view of a pulling reset pliers according to a first embodiment of the present invention;
FIG. 8 is a schematic view of a first embodiment of the present invention;
FIG. 9 is a schematic structural view of a fusion fastening device according to a second embodiment of the present invention;
FIG. 10 is another schematic structural view of a fusion-fixing device according to a second embodiment of the present invention;
FIG. 11 is a schematic view of a third bone plate according to a third embodiment of the present invention;
reference numerals illustrate:
100. a fusion fixture; 200. holding the restorer; 300. lifting the reset forceps; 400. a mold testing device; 110. a first connection portion; 210. a second connecting portion; 310. a first conductive portion; 320. a second conductive portion; 120. a first cage; 121. a slip preventing protrusion; 122. a front side plate; 123. a rear side plate; 124. a first fixing hole; 130. a second bone plate; 131. a fourth fixing hole; 220. holding the inner rod; 230. resetting the sleeve; 240. resetting the transverse hook rod; 250. rotating the handle; 221. a first external thread; 231. a first internal thread; 232. a baffle; 234. cutting into sections; 235. a fixing protrusion; 241. a second internal thread; 242. blocking hook piece; 330. a first hand-held portion; 340. a second hand-held portion; 350. a fastening part; 360. a first clamping lever; 370. a second clamping rod; 351. a first buckle; 410. a handle; 420. a conductive rod; 430. a test die head; 431. a first side; 432. a second side; 433. a third side; 434. a third blocking plate; 140. a first bone plate; 141. a first side; 142. a second side; 143. a second fixing hole; 144. a third fixing hole; 145. a first blocking plate; 150. a third bone plate; 151. a fifth fixing hole; 152. a sixth fixing hole; 153. and a seventh fixing hole.
Detailed Description
The following describes embodiments of the present invention in detail.
First embodiment:
as shown in fig. 1 to 8, the present embodiment discloses an anterior atlantoaxial lateral mass joint reduction fusion device system, which comprises a fusion fixing device 100, a holding and resetting device 200, a lifting and resetting forceps 300 and a mold testing device 400, wherein a first connecting part 110 is arranged on the fusion fixing device 100, a second connecting part 210 is arranged on the holding and resetting device 200, the fusion fixing device 100 is connected with the holding and resetting device 200 through the first connecting part 110 and the second connecting part 210, the lifting and resetting forceps 300 at least comprise a first conducting part 310 and a second conducting part 320, and the holding and resetting device 200 is positioned between the first conducting part 310 and the second conducting part 320;
the fusion fixing device 100 comprises a first fusion device 120, wherein the first fusion device 120 can be set to be of different sizes according to different patients, the whole first fusion device 120 of the embodiment is of a cuboid structure, the peripheral outer surface of the first fusion device 120 is round and moist, the first fusion device 120 is conveniently implanted between atlantoaxial lateral mass joints, a first cavity which penetrates up and down is formed in the first fusion device 120, anti-slip protrusions 121 are arranged on the upper surface and the lower surface of the first fusion device 120, the first fusion device 120 is provided with a front side plate 122 and a rear side plate 123, the lower side edge of the front side plate 122 is inclined towards the direction of the rear side plate 123 relative to the upper side edge of the front side plate 122, the front side plate 122 is provided with two first fixing holes 124 which penetrate through the front side plate 122, internal threads are arranged in the two first fixing holes 124, the front side of the front side plate 122 extends obliquely upwards, the inner diameter of the first fixing holes 124 is gradually narrowed in the extending process, the inner diameter of the first fixing holes 124 is 2.8mm at the inlet of the front side plate 122, and the inner diameter of the first fixing holes 124 is 2.5mm at the outlet of the front side plate 122; the first connecting portion 110 of the present embodiment is located on the front side plate 122, and the first connecting portion 110 is located between the two first fixing holes 124;
The fusion fixing device 100 of the present embodiment further includes a second bone plate 130, where the second bone plate 130 is connected to the front side plate 122 of the first fusion device 120 and is located below the first fusion device 120, and fourth fixing holes 131 penetrating through the front surface and the rear surface of the second bone plate 130 are formed in the second bone plate 130, and screws are driven into the fourth fixing holes 131 to fix the second bone plate 130 to the pivot;
the holding restorer 200 of this embodiment includes a holding inner rod 220, a restoring sleeve 230 and a restoring cross hook rod 240, wherein a rotating handle 250 is fixed on the top of the holding inner rod 220, a protruding pattern is provided on the rotating handle 250, the protruding pattern has an anti-slip effect, a second connecting portion 210 is located at the bottom of the holding inner rod 220, the second connecting portion 210 is a second external thread, a first connecting portion 110 is a third internal thread matched with the second connecting portion 210, the holding inner rod 220 is connected and fixed with the first fusion device 120 through the first connecting portion 110 and the second connecting portion 210, a first external thread 221 is provided on the upper portion of the holding inner rod 220, the first external thread 221 is located at one third position above the holding inner rod 220, a first internal thread 231 matched with the first external thread 221 is provided on the corresponding position on the restoring sleeve 230, the inside of the restoring sleeve 230 is a hollow structure, the reset sleeve 230 is movably sleeved on the holding inner rod 220 through the first external thread 221 and the first internal thread 231, the height of the reset sleeve 230 is lower than that of the holding inner rod 220, a baffle 232 is arranged on the reset sleeve 230, one end of the baffle 232 is connected with the bottom of the reset sleeve 230, the other end of the baffle 232 extends obliquely upwards away from the bottom of the reset sleeve 230, the baffle 232 is designed to be more fit with the first fusion device 120 and is beneficial to the conduction of the striking force on the rotary handle 250, after the reset sleeve 230 is connected with the fusion fixing device 100, the other end of the baffle 232 protrudes out of the edge of the first fusion device 120, the bottom of the reset sleeve 230 is provided with a concave tangent plane 234, the tangent plane 234 is positioned on two opposite sides of the reset sleeve 230, the tangent plane 234 is positioned on two sides of the baffle 232, the concave tangent plane 234 can prevent the reset sleeve 230 from being blocked by screws in the first fixing hole 124 on the first fusion device 120, the bottom of the baffle 232 is provided with a fixing protrusion 235, the fixing protrusions 235 are also located outside the edge of the first cage 120; the reset cross hook rod 240 is movably sleeved on the holding inner rod 220, the reset cross hook rod 240 is positioned above the reset sleeve 230, a second internal thread 241 matched with the first external thread 221 is arranged on the contact surface of the reset cross hook rod 240 and the holding inner rod 220, a blocking hook piece 242 is arranged on the reset cross hook rod 240, and the bottom of the blocking hook piece 242 is fixed on the upper surface of the reset cross hook rod 240;
The pulling reset pliers 300 of the embodiment further include a clamping portion, a first handheld portion 330, a second handheld portion 340, and a fastening portion 350, where the first conductive portion 310 is connected to the first handheld portion 330, the second conductive portion 320 is connected to the second handheld portion 340, a connection portion between the first conductive portion 310 and the first handheld portion 330 is hinged to a connection portion between the second conductive portion 320 and the second handheld portion 340, the first conductive portion 310 is an arc structure recessed away from the second conductive portion 320, the second conductive portion 320 is an arc structure recessed away from the first conductive portion 310, the clamping portion includes a first clamping rod 360 and a second clamping rod 370, the first clamping portion is disposed opposite to the second clamping portion, the first clamping rod 360 is connected to the first conductive portion 310, the second clamping rod 370 is connected to the second conductive portion 320, one end of the fastening portion 350 is located on the second handheld portion 340, the other end of the fastening portion 350 passes through the first handheld portion 330, a plurality of first fasteners 351 are disposed on the fastening portion 350, a plurality of second fasteners 351 are disposed at corresponding positions on the first handheld portion 330, and the first fasteners are matched with the second fasteners 351;
the mold tester 400 of this embodiment includes a handle 410, a conductive rod 420 and a mold testing head 430, wherein the handle 410 is connected with one end of the conductive rod 420, the mold testing head 430 is connected with the other end of the conductive rod 420, the mold testing head 430 has at least a first side 431, a second side 432 and a third side 433, the first side 431 is opposite to the second side 432, the first side 431 is higher than the second side 432, the first side 431 is connected with the second side 432, the connection part of the first side 431 and the second side 432 adopts a convex arc smooth transition, the first side 431 and the second side 432 are both connected with the third side 433, the third side 433 is connected with the conductive rod 420, the third side 433 is provided with a third blocking plate 434, the third blocking plate 434 protrudes towards the second side 432, and the handle 410 of the mold testing head 430 is provided with a non-slip protrusion 121;
The embodiment also discloses a method for using the anterior atlantoaxial lateral mass joint reduction fusion cage system, which comprises the following steps:
the fusion fixing device 100 is connected to the holding and repositioning device 200 through the first connecting portion 110 and the second connecting portion 210;
the fusion fixing device 100 is driven to be placed between the atlas and the axial through the holding restorer 200 at the front side of the oral cavity;
pulling the reduction forceps 300 through the anterior aspect of the mouth to clamp the cortex on both sides of the dentate or stump of the dentate process of the dentate cone;
the rotating handle 250 of the holding restorer 200 is rotated reversely, the holding inner rod 220 is rotated reversely, and as the holding inner rod 220 is in threaded connection with the reset sleeve 230 and the reset cross hook rod 240, the reset cross hook rod 240 can be driven upwards by the reversely rotating inner rod 220, the lifting reset pliers 300 are hooked by the reset cross hook rod 240, the lifting reset pliers 300 are driven to move forwards and upwards through the force conduction of the reset cross hook rod 240, and the lifting reset pliers 300 are driven to reset forwards and upwards through the clamping part and then lifting the pivot; meanwhile, when the holding inner rod 220 is reversely rotated, the internal and external screw threads between the holding inner rod 220 and the reset sleeve 230 are hinged to act on the reset sleeve 230 in a reaction way, so that the reset sleeve 230 is pushed to be backwards and downwards, then the blocking piece 232 at the bottom of the reset sleeve 230 is contacted with the front of the atlas lateral mass, and the atlas is pushed to be backwards and downwards reset further.
The advantages and principles of this embodiment are as follows:
1. as shown in fig. 2, the fusion fixture 100 is connected to the holding and restoring apparatus 200, the fusion fixture 100 is placed between the atlas and the epistrophus through the holding and restoring apparatus 200 through the oral cavity, and simultaneously, the bottom of the lifting and restoring forceps 300 clamps the epistrophus dentate process or the cortex on both sides of the epistrophus stump through the oral cavity, after the holding inner rod 220 of the holding and restoring apparatus 200 is rotated reversely, the holding inner rod 220 of the holding and restoring apparatus 200 moves upwards, the holding inner rod 220 drives the restoring cross hook rod 240 to move upwards in the moving process, the restoring cross hook rod 240 hooks the first conducting part 310 or the second conducting part 320 of the lifting and restoring forceps 300, the lifting and restoring forceps 300 is driven to restore the epistrophus forward through the clamping part thereof, and simultaneously, the lifting and restoring forceps 300 applies a reaction force to the holding and restoring apparatus 200 through the restoring cross hook rod 240 in the moving process of the holding and restoring apparatus 200, the internal and external screw threads of the holding inner rod 220 and the reset sleeve 230 are twisted to react on the reset sleeve 230, so that the bottom baffle 232 of the reset sleeve 230 holding the reset device 200 pushes the atlas lateral block backward to reset the atlas, then the matching screw is screwed into the first fixing hole 124 of the front side plate of the fusion fixing device 100, the fusion fixing device 100 is fixed with the atlas and the axis, and then the lifting reset forceps 300 and the holding reset device 200 are taken out, the system can be used for treating the upper cervical vertebra diseases such as atlantoaxial dislocation and skull base depression by only making an operation incision on the front side of a human body through an opening, the system is used for the atlantoaxial dislocation and skull base depression operation, has simple operation, avoids making two operation incisions on the front side and the back side of the human body, and changes the body position under the extremely unstable state in the operation, to increase the likelihood of high paraplegia and even death caused by spinal cord injury.
2. The first fusion device 120 of the fusion fixing device 100 is formed by 3D printing, the first cavity on the first fusion device 120 is used for being implanted into a human body autologous bone or allogeneic bone, and after the first fusion device 120 is implanted into a human body, the human body autologous bone or allogeneic bone and the atlantoaxial lateral mass joint form osseous fusion, so that the fusion stability of the first fusion device 120 and the atlantoaxial lateral mass joint is improved; the upper and lower surfaces of the first cage 120 are provided with anti-slip protrusions 121, which prevent the first cage 120 from being displaced or dislocated with the atlantoaxial lateral mass joint after the first cage 120 is implanted with the atlantoaxial lateral mass joint.
3. The first fixing hole 124 on the first cage 120 extends obliquely upward from the front side of the front side plate 122 to the rear side of the front side plate 122, and the inner diameter of the first fixing hole 124 is gradually narrowed in the extending process, and is provided with internal threads, and the first cage 120 and the atlas can be fixed into a whole by driving the locking screw into the first fixing hole 124, and the screw can be prevented from being screwed into the fusion cage too deeply or from being loosened backward.
4. The inner holding rod 220 of the holding and resetting device 200 is provided with a rotating handle 250, the inner holding rod 220 can be rotationally held by rotating the rotating handle 250, the resetting sleeve 230 is movably sleeved on the inner holding rod 220, the first external thread 221 on the inner holding rod 220 is matched with the first internal thread 231 on the resetting sleeve 230, the resetting transverse hook rod 240 is positioned on the inner holding rod 220 and above the resetting sleeve 230, the inner holding rod 220 is rotated reversely, the inner holding rod 220 moves upwards to drive the resetting transverse hook rod 240 to move upwards, the resetting transverse hook rod 240 hooks the lifting and resetting pliers 300 in the upward moving process, the lifting and resetting pliers 300 are driven to move upwards, and the lifting and resetting pliers lift the pivot in the upward moving process and reset the pivot.
5. The reset transverse hook rod 240 is provided with a blocking hook piece 242, and the blocking hook piece 242 hooks the lifting reset pliers 300 in the moving process of the reset transverse hook rod 240, so that the lifting reset pliers 300 are driven to move.
6. The bottom of the reset sleeve 230 is provided with the baffle plate 232, the bottom of the baffle plate 232 is provided with the fixing protrusion 235, when the reset device 200 is held and pressed to the state that the front side plate 122 of the first fusion device 120 is in the same level with the cortical bone in front of the atlas lateral mass, the baffle plate 232 at the bottom of the reset sleeve 230 is contacted with the cortical bone in front of the atlas lateral mass, when the rotating handle 250 holding the inner rod 220 is pressed again, the first fusion device 120 can be limited to be placed too deeply due to the baffle plate 232 at the bottom of the reset sleeve 230, and the fixing protrusion 235 at the bottom of the baffle plate 232 can be nailed into the cortical bone in front of the atlas lateral mass to play a temporary anti-skid and fixing role.
7. The first clamping portion and the second clamping portion of the lifting and resetting forceps 300 are used for clamping both sides of dentate process or tooth process stumps of the dentate process, lifting and resetting the dentate process, meanwhile, the first clamping portion and the second clamping portion can avoid cervical spinal marrow damage caused by slipping out of hand when lifting and pulling the dentate process, the design of the first conducting portion 310 and the second conducting portion 320 can avoid the shielding of the visual field above the oral cavity operation field during operation, and the clamping portion 350 on the lifting and resetting forceps 300 can prevent the first handheld portion 330 and the second handheld portion 340 from loosening.
8. Before the fusion fixing device 100 is put into a human body, the mold testers 400 with different sizes can be firstly put between the atlas and the axis, the most suitable mold testers 400 are selected, then the first fusion device 120 with the proper size is selected according to the size of the mold testers 400, the first fusion device 120 placed between the atlas and the axis is prevented from being unsuitable in size, and meanwhile, the mold testers 400 with different sizes can gradually prop open the atlantoaxial lateral mass joint gap after the atlantoaxial gap is loosened and reset, so that the effects of further loosening and resetting are achieved.
9. The joint of the first side 431 and the second side 432 of the mold testing head 430 of the mold testing device 400 adopts convex arc smooth transition, so that the mold testing device 400 is convenient to drive into the atlantoaxial lateral mass joint, the third baffle on the mold testing device 400 can prevent the mold testing head 430 from being driven into too deep to damage the cervical spinal cord, and simultaneously the mold testing device 400 can skid and dial by taking the third baffle as a fulcrum through the handle 410 and the conducting rod 420, so that the atlantoaxial is further reset.
Second embodiment:
the description is given with reference to fig. 1 to 8:
the embodiment discloses a reduction fusion device system for a lateral mass joint of an atlantoaxial via an anterior approach, which comprises a fusion fixing device 100, a holding reduction device 200, a lifting reduction forceps 300 and a mold testing device 400, wherein the holding reduction device 200, the lifting reduction forceps 300 and the mold testing device 400 of the embodiment are the same as those of the first embodiment, and are not described in detail herein, the fusion fixing device 100 comprises a first fusion device 120 and a first bone plate 140, the first fusion device 120 is the same as that of the first embodiment, as shown in fig. 9 and 10, the shape of the first bone plate 140 of the embodiment is matched with that of the lower bone surface of the lateral mass and the atlas axial, the first bone plate 140 is fixed with a front side plate 122 of the first fusion device 120 and is positioned below the first fusion device 120, the first bone plate 140 comprises a first side edge 141 and a second side edge 142, the first side edge 141 and the second side edge 142 are both in a curved arc structure, the first side 141 and the second side 142 are connected in an arc smooth transition manner at the end far away from the first fusion device 120, a second fixing hole 143 and a third fixing hole 144 penetrating through the front surface and the rear surface of the first bone plate 140 are arranged in the longitudinal direction of the first bone plate 140, the second fixing hole 143 is positioned above the third fixing hole 144, wherein the inner side of the second fixing hole 143 is a smooth arc surface, the inner diameter of the second fixing hole 143 is gradually narrowed in the direction from the front surface to the rear surface of the first bone plate 140, an internal thread is arranged in the third fixing hole 144, a first blocking plate 145 is arranged between the second fixing hole 143 and the third fixing hole 144, the first blocking plate 145 is hinged with the first bone plate 140 in a rotating manner, the longest distance between the two opposite sides of the first blocking plate 145 is larger than the shortest distance between the second fixing hole 143 and the third fixing hole 144, by rotating the first blocking plate 145, opposite ends of the first blocking plate 145 are disposed above the second and third fixing holes 143 and 144, so that the screws in the second and third fixing holes 143 and 144 can be prevented from being loosened;
After the fusion and fixation device 100 of the present embodiment is implanted into a human body, the first fusion cage 120 and the atlas are fixed into a whole by driving self-tapping and self-locking screws into the two first fixing holes 124; the surfaces of the atlantoaxial vertebral body and the lateral mass are hard cortical bone, cancellous bone is arranged in the atlantoaxial vertebral body and the lateral mass, and screws with cancellous bone threads in front and cortical bone threads in the rear third can be nailed into the two first fixing holes 124, the internal threads in the two first fixing holes 124 are matched with the cortical bone threads, and the first fusion device 120 and the atlantoaxial are fixed into a whole after the screws are nailed; then, screws are driven into the second fixing holes 143 and the third fixing holes 144 of the first fusion device 120, so that the first bone plate 140 is fixed with the pivoxil;
the advantages of this embodiment are as follows:
1. the first bone plate 140 is positioned below the first fusion device 120 and connected with the first fusion device 120, and screws are nailed into the second fixing holes 143 and the third fixing holes 143 of the first bone plate 140, so that the first bone plate 140 can be fixed with the dentate vertebra, the purpose of integrally fixing the first fusion device 120 with the atlas and the dentate vertebra is achieved, and the first blocking plate 145 between the second fixing holes 143 and the third fixing holes 144 is used for blocking the screws in the second fixing holes 143 and the third fixing holes 144 and preventing the screws in the second fixing holes 143 and the third fixing holes 144 from falling off;
2. The inside of the second fixing hole 143 is a smooth arc surface, the inside diameter of the second fixing hole 143 is gradually narrowed from the front surface to the rear surface of the first bone fracture plate 140, after the lag screw is implanted in the second fixing hole 143, the screw needle inserting direction can be adjusted to a certain extent according to the running of the pivot cone and the vertebral artery, the screw inserting operation is convenient, the screw inserting safety is ensured, the possibility of damaging the cervical spinal cord and the vertebral artery is reduced, on the other hand, the inside diameter of the second fixing hole 143 is gradually narrowed in the process of screwing the screw, and the inside of the second fixing hole 143 is a smooth arc surface, after the screw is placed in the second fixing hole 143, the screw is limited in the second fixing hole 143, the screw cannot be continuously inserted into the pivot cone in the horizontal direction, and the pivot cone can be pulled forward to be closely attached to the bone fracture plate in the opposite direction if the screw is continuously screwed, so that the effect of further resetting is achieved.
Third embodiment:
the description is given with reference to fig. 1 to 8:
the embodiment discloses a fusion device system for reducing a lateral mass joint of an atlantoaxial anterior canal through the mouth, which comprises a fusion fixing device 100, a holding and resetting device 200, a lifting and resetting clamp 300 and a mold testing device 400, wherein the holding and resetting device 200, the lifting and resetting clamp 300 and the mold testing device 400 of the embodiment are the same as those of the first embodiment, and the description is omitted herein, the fusion fixing device 100 of the embodiment comprises a first fusion device 120 and a third bone plate 150, and the structure of the first fusion device 120 is the same as that of the first embodiment, except that: as shown in fig. 11, the first fusion device 120 and the third bone plate 150 of the present embodiment are of a split structure, the third bone plate 150 is located at the front side of the first fusion device 120, the third bone plate 150 is of a zigzag structure, at least a fifth fixing hole 151, a sixth fixing hole 152 and a seventh fixing hole 153 penetrating the third bone plate 150 from front to back are provided on the third bone plate 150, the fifth fixing hole 151 is located at the upper portion of the third bone plate 150, the sixth fixing hole 152 and the seventh fixing hole 153 are located at the lower portion of the third bone plate 150, the inner side of the sixth fixing hole 152 is a smooth arc surface, and the inner diameter of the sixth fixing hole 152 is gradually narrowed in the direction from the front side to the rear side of the third bone plate 150, and a second blocking plate is provided between the sixth fixing hole 152 and the seventh fixing hole 153;
The advantages of this embodiment are as follows:
1. when the oral cavity of a patient is narrow, the skull base deformity and the atlantoaxial dislocation are serious and cannot be recovered perfectly, and the first fusion device 120 and the bone plate are connected and then the integrated fusion device is difficult to put due to serious local anatomical structure deformation or other reasons, the first fusion device 120 and the third bone plate 150 are designed to be split, the first fusion device 120 is small in size, the visual field barrier is small during the placement, the placement is convenient, the third bone plate 150 is placed after the first fusion device 120 is placed into a human body, and the third bone plate 150 is fixed with the atlas and the axis;
2. the third bone plate 150 is in a Z-shaped structure, and the Z-shaped structure is designed according to the characteristics of the anatomical structure in front of the atlantoaxial, so that the third bone plate 150 is better fixed with the atlantoaxial and the axial, and the fixed third bone plate 150 is closer to the bone surface;
an inner thread which is inclined outwards and upwards is arranged in a fifth fixing hole 151 at the upper part of the third bone plate 150, a locking screw is arranged in the fifth fixing hole 151 to fix the third bone plate 150 and the atlas, and the locking screw is hinged with the inner thread, so that the screw can be prevented from loosening; the inner diameter of the sixth fixing hole 152 is gradually narrowed, the inner side of the sixth fixing hole 152 is a smooth arc surface, when the screw is inserted into the sixth fixing hole 152, the entering direction of the screw can be adjusted, the screw insertion operation is facilitated, in the process of screwing the screw, as the inner diameter of the sixth fixing hole 152 is gradually narrowed, when the tail of the screw is contacted with the sixth fixing hole 152, the screw cannot continuously enter deeply into the pivot, if the screw is continuously screwed, the pivot can be pulled forward to cling to the bone plate in the opposite direction, the effect of further resetting is achieved, and after the locking screw is inserted into the seventh fixing hole 153, the third bone plate 150 can be further fixed with the pivot.
3. A second blocking plate between the sixth fixing hole 152 and the seventh fixing hole 153 for blocking the screws in the sixth fixing hole 152 and the seventh fixing hole 153 and preventing the screws in the sixth fixing hole 152 and the seventh fixing hole 153 from falling off;
the foregoing is merely exemplary embodiments of the present invention, and is not intended to limit the scope of the present invention; any substitutions and modifications made without departing from the spirit of the invention are within the scope of the invention.
Claims (7)
1. The fusion device system for reducing the atlantoaxial lateral mass joint through the anterior canal is characterized by comprising a fusion fixing device, a holding restorer and a lifting restorer, wherein a first connecting part is arranged on the fusion fixing device, a second connecting part is arranged on the holding restorer, the fusion fixing device is connected with the holding restorer through the first connecting part and the second connecting part, the lifting restorer at least comprises a first conducting part and a second conducting part, and the holding restorer is positioned between the first conducting part and the second conducting part;
the holding restorer comprises a holding inner rod, a resetting sleeve and a resetting transverse hook rod, wherein the resetting sleeve is movably sleeved on the holding inner rod, the resetting transverse hook rod is movably arranged on the holding inner rod, the resetting transverse hook rod is positioned above the resetting sleeve, a rotary handle is fixed at the top of the holding inner rod, a first external thread is arranged on the upper part of the holding inner rod, a first internal thread matched with the first external thread is arranged at a corresponding position on the resetting sleeve, a second internal thread matched with the first external thread is arranged on a contact surface of the resetting transverse hook rod and the holding inner rod, and the second connecting part is positioned at the bottom of the holding inner rod;
A baffle plate is arranged on the reset sleeve, one end of the baffle plate is connected with the bottom of the reset sleeve, the other end of the baffle plate extends obliquely upwards away from the bottom of the reset sleeve, and a fixing protrusion is arranged at the bottom of the baffle plate; the reset transverse hook rod is provided with a blocking hook piece, and the bottom of the blocking hook piece is fixed on the upper surface of the reset transverse hook rod;
the holding restorer can put the fusion fixing device between the atlas and the epistropheus through the oral cavity, simultaneously the bottom of the lifting restoring forceps can clamp the epistropheus dentate process or the cortex on two sides of the epistropheus stump through the oral cavity, after the holding restorer holds the inner rod through reverse rotation, the holding restorer holds the inner rod to move upwards, the holding restorer holds the inner rod to drive the reset transverse hook rod to move upwards in the moving process, the reset transverse hook rod hooks the first conducting part or the second conducting part of the lifting restoring forceps, the lifting restoring forceps is driven to lift the epistropheus forwards and upwards through the clamping part of the lifting restoring forceps, and simultaneously in the moving process of the holding restorer driving the lifting restoring forceps, the lifting restoring forceps applies a reaction force to the holding restorer through the reset transverse hook rod, and the inner and outer threads of the holding restorer are hinged to the restoring sleeve, so that the bottom baffle of the restoring sleeve of the holding the restorer pushes the atlas to push the atlas backwards, and the atlas is restored.
2. The reduction fusion device system of the anterior atlantoaxial lateral mass joint of claim 1, wherein the fusion fixing device comprises a first fusion device, a first cavity penetrating up and down is arranged on the first fusion device, anti-slip protrusions are arranged on the upper surface and the lower surface of the first fusion device, the first fusion device is provided with a front side plate and a rear side plate, the lower side edge of the front side plate is inclined towards the direction of the rear side plate relative to the upper side edge of the front side plate, a first fixing hole penetrating through the front side plate is arranged on the front side plate, the first fixing hole extends obliquely upwards from the front side of the front side plate to the rear side of the front side plate, the inner diameter of the first fixing hole is gradually narrowed in the extending process, an inner thread is arranged in the first fixing hole, and the first connecting part is positioned on the front side plate.
3. The anterior atlantoaxial lateral mass joint reduction cage system according to claim 2, wherein the fusion fixation device further comprises a first bone plate, the first bone plate is connected with the anterior plate of the first fusion cage and is located below the first fusion cage, the first bone plate is provided with at least a second fixation hole and a third fixation hole penetrating through the anterior surface and the posterior surface of the first bone plate, a first blocking plate is arranged between the second fixation hole and the third fixation hole, the first blocking plate is rotationally hinged with the first bone plate, the inner side of the second fixation hole is a smooth arc surface, and the inner diameter of the second fixation hole gradually narrows from the anterior surface to the posterior surface of the first bone plate.
4. The anterior atlantoaxial lateral mass joint reduction cage system of claim 2, wherein the fusion fixture further comprises a second bone plate, the second bone plate is connected to the anterior plate of the first cage and is located below the first cage, and the second bone plate is provided with a fourth fixation hole penetrating the anterior and posterior surfaces of the second bone plate.
5. The reduction fusion device system of the anterior atlantoaxial lateral mass joint of claim 2, wherein the fusion fixing device further comprises a third bone plate, the third bone plate is located at the front side of the first fusion device, the first fusion device and the third bone plate are of a split type structure, the third bone plate is of a Z-shaped structure, at least a fifth fixing hole, a sixth fixing hole and a seventh fixing hole which penetrate through the third bone plate from front to back are arranged on the third bone plate, the fifth fixing hole is located at the upper portion of the third bone plate, the sixth fixing hole and the seventh fixing hole are located at the lower portion of the third bone plate, the inner side of the sixth fixing hole is of a smooth arc surface, the inner diameter of the sixth fixing hole is gradually narrowed in the direction from the front side to the rear side of the third bone plate, and a second blocking plate is arranged between the sixth fixing hole and the seventh fixing hole.
6. The anterior atlantoaxial lateral mass joint reduction fusion cage system according to any one of claims 1-5, wherein the pulling reduction forceps further comprises a first hand-held portion, a second hand-held portion and a clamping portion, the first conducting portion is connected with the first hand-held portion, the second conducting portion is connected with the second hand-held portion, the connection of the first conducting portion and the first hand-held portion is hinged with the connection of the second conducting portion and the second hand-held portion, the first conducting portion is of an arc-shaped structure which is recessed towards a direction away from the second conducting portion, the second conducting portion is of an arc-shaped structure which is recessed towards a direction away from the first conducting portion, the clamping portion comprises a first clamping rod and a second clamping rod, the first clamping rod is connected with the first conducting portion, the second clamping rod is connected with the second clamping portion, one end of the first clamping portion is located on the second hand-held portion, the other end of the clamping portion penetrates through the clamping portion, a plurality of clamping portions are arranged on the first clamping portion and the second clamping portion are provided with a plurality of corresponding clamping portions.
7. The reduction fusion device system of any one of claims 1 to 5, further comprising a mold testing device, wherein the mold testing device comprises a handle, a conductive rod and a mold testing head, the handle is connected with one end of the conductive rod, the mold testing head is connected with the other end of the conductive rod, the mold testing head is provided with at least a first side surface, a second side surface and a third side surface, the first side surface is opposite to the second side surface, the first side surface is higher than the second side surface, the first side surface is connected with the second side surface, the connection part of the first side surface and the second side surface adopts convex arc-shaped transition, the first side surface and the second side surface are both connected with the third side surface, the third side surface is connected with the conductive rod, a third blocking plate is arranged on the third side surface, and the third blocking plate protrudes towards the second side surface.
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| CN201910188603.1A CN109771106B (en) | 2019-03-13 | 2019-03-13 | Anterior atlantoaxial lateral mass joint reduction fusion cage system and application method thereof |
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| CN111714165B (en) * | 2020-05-08 | 2022-03-04 | 四川大学华西医院 | Cervical anterior small joint twistlock opening and resetting device |
| CN114587551B (en) * | 2022-03-03 | 2023-08-22 | 浙江德康医疗器械有限公司 | Internal fixing system for cervical vertebra lateral bending orthopedic cervical vertebra front path steel plate |
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