CN111281622A - Vertebral body replacement device - Google Patents
Vertebral body replacement device Download PDFInfo
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- CN111281622A CN111281622A CN202010225050.5A CN202010225050A CN111281622A CN 111281622 A CN111281622 A CN 111281622A CN 202010225050 A CN202010225050 A CN 202010225050A CN 111281622 A CN111281622 A CN 111281622A
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- seat
- supporting seat
- locking
- end cover
- adjusting sleeve
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- 238000006073 displacement reaction Methods 0.000 claims abstract description 31
- 210000000988 bone and bone Anatomy 0.000 claims description 41
- 239000011148 porous material Substances 0.000 claims description 5
- 230000001413 cellular effect Effects 0.000 claims description 3
- 230000015572 biosynthetic process Effects 0.000 claims description 2
- 238000003780 insertion Methods 0.000 description 8
- 230000037431 insertion Effects 0.000 description 8
- 238000001125 extrusion Methods 0.000 description 3
- 230000004927 fusion Effects 0.000 description 3
- 230000035876 healing Effects 0.000 description 3
- 239000000725 suspension Substances 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 230000002980 postoperative effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002513 implantation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 231100000915 pathological change Toxicity 0.000 description 1
- 230000036285 pathological change Effects 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
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Classifications
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2/44—Joints for the spine, e.g. vertebrae, spinal discs
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
- A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
- A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
- A61B17/70—Spinal positioners or stabilisers ; Bone stabilisers comprising fluid filler in an implant
- A61B17/7062—Devices acting on, attached to, or simulating the effect of, vertebral processes, vertebral facets or ribs ; Tools for such devices
- A61B17/7064—Devices acting on, attached to, or simulating the effect of, vertebral facets; Tools therefor
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
- A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
- A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
- A61B17/70—Spinal positioners or stabilisers ; Bone stabilisers comprising fluid filler in an implant
- A61B17/7094—Solid vertebral fillers; devices for inserting such fillers
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
- A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
- A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
- A61B17/70—Spinal positioners or stabilisers ; Bone stabilisers comprising fluid filler in an implant
- A61B17/7097—Stabilisers comprising fluid filler in an implant, e.g. balloon; devices for inserting or filling such implants
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2/44—Joints for the spine, e.g. vertebrae, spinal discs
- A61F2/4455—Joints for the spine, e.g. vertebrae, spinal discs for the fusion of spinal bodies, e.g. intervertebral fusion of adjacent spinal bodies, e.g. fusion cages
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- Health & Medical Sciences (AREA)
- Orthopedic Medicine & Surgery (AREA)
- Neurology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Surgery (AREA)
- General Health & Medical Sciences (AREA)
- Veterinary Medicine (AREA)
- Heart & Thoracic Surgery (AREA)
- Public Health (AREA)
- Animal Behavior & Ethology (AREA)
- Molecular Biology (AREA)
- Medical Informatics (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Cardiology (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Transplantation (AREA)
- Vascular Medicine (AREA)
- Prostheses (AREA)
Abstract
The invention relates to a vertebral body replacement device, which comprises a main body structure, wherein the main body structure comprises an upper supporting seat, a lower supporting seat, an upper end cover and a lower end cover, the upper supporting seat is in sliding fit with the lower supporting seat, the upper end cover is arranged at the end part of the upper supporting seat, the lower end cover is arranged at the end part of the lower supporting seat, and the vertebral body replacement device is characterized in that: the anti-displacement auxiliary structure comprises a plurality of support rods and a plurality of locking seats, the locking seats are used for being connected with the connecting rods, the support rods are arranged at the two ends of the upper end cover and the lower end cover respectively, each support rod is connected with the corresponding locking seat respectively, and the main body structure, the anti-displacement auxiliary structure and the connecting rods connected with the locking seats form an integrated structure. The invention can effectively prevent displacement.
Description
Technical Field
The invention relates to a replacement device, in particular to a vertebral body replacement device, and belongs to the technical field of medical instruments.
Background
The spine stability after excising the centrum can be destroyed undoubtedly, it is the prerequisite that maintains the normal biomechanics stability of backbone to rebuild the backbone structure function, the bone grafting that the centrum replacement device was applied to the centrum is rebuild and is fused, when the operation, for the fusion effect that improves bone healing and produce, fill autologous bone in the inner chamber of the major structure of product, the end cover at both ends offsets with the terminal surface of upper and lower centrum respectively on the major structure, make the fusion ware produce mechanics supporting role, the autogenous bone of implantation takes place bone healing and reaches the fusion between the centrum. Because the spine has certain physiological curvature, after the spine is implanted into the vertebral body replacement device, the vertebral body positioned at the upper position and the lower position of the vertebral body replacement device is extruded after being bent, so that the position of the replacement device can be displaced forwards and backwards in the extrusion process, once the displacement occurs, the operation can fail, and even pathological changes can be caused when the displacement is serious.
Disclosure of Invention
The purpose of the invention is: provides a vertebral body replacement device which can effectively prevent displacement.
In order to achieve the purpose, the technical scheme of the invention is as follows: the utility model provides a centrum replacement device, includes the major structure, the major structure includes supporting seat, under bracing seat, upper end cover and bottom end cover, go up supporting seat and under bracing seat sliding fit, the upper end cover is established at last supporting seat tip, and the tip at the under bracing seat is established to the bottom end cover, and its innovation point lies in:
the anti-displacement auxiliary structure comprises a plurality of support rods and a plurality of locking seats, the locking seats are used for being connected with the connecting rods, the support rods are arranged at the two ends of the upper end cover and the lower end cover respectively, each support rod is connected with the corresponding locking seat respectively, and the main body structure, the anti-displacement auxiliary structure and the connecting rods connected with the locking seats form an integrated structure.
In the technical scheme, the both ends of upper end cover are equipped with the engaging lug respectively, it has last bulb hole to go up the engaging lug, and the pore wall of going up the bulb hole is equipped with partial screw thread, the both ends of lower end cover are equipped with down the engaging lug respectively, the engaging lug has down the bulb hole down, and the pore wall of bulb hole is equipped with partial screw thread down, and the one end of every support rod all has the bulb portion, and the surface of bulb portion has the external screw thread, and the bulb portion of every support rod is established respectively in last bulb hole of engaging lug and the lower bulb hole of engaging lug down.
In the technical scheme, the locking seat is provided with the support rod jack, the connecting rod clamping groove and the locking hole which are mutually communicated, the other end of the support rod is provided with the flat surface, the other end of the support rod is inserted into the support rod jack, the flat surface of the support rod is abutted to the hole wall of the support rod jack, the connecting rod is clamped in the connecting rod clamping groove, the locking hole is internally provided with the locking cam, after the locking cam is rotated, the locking cam is abutted to one side face of the connecting rod, the other side face of the connecting rod is abutted to the support rod, and the support rod, the locking seat and the connecting rod are locked into a whole.
In the technical scheme, the locking cam comprises a threaded connector and a locking column which are integrated, the threaded connector is in threaded connection with the locking hole, the threaded connector is provided with a hexagon socket, the locking column is provided with an eccentric plane, and after the locking cam is rotated, the eccentric plane of the locking cam is abutted to one side face of the connecting rod.
In the technical scheme, the device also comprises a main body height adjusting mechanism, wherein the main body height adjusting mechanism comprises an adjusting sleeve and an anti-convolution mechanism for preventing the adjusting sleeve from circling, the adjusting sleeve is sleeved on the periphery of the end part of the lower supporting seat and positioned on the inner side of the upper end cover, the adjusting sleeve is in threaded connection with the upper supporting seat, and the upper supporting seat can move up and down relative to the lower supporting seat by rotating the adjusting sleeve; the anti-convolution mechanism comprises a locking nut, the upper portion of the lower supporting seat is provided with the locking nut in threaded connection with the adjusting sleeve at a position close to the adjusting sleeve, the adjusting sleeve is provided with a plurality of tooth grooves, the locking nut is rotated, and the end portion of the locking nut can be clamped in the tooth groove corresponding to the adjusting sleeve.
In the technical scheme, the inner wall of the adjusting sleeve is provided with an anti-falling groove, the end part of the lower supporting seat is provided with a boss, and the boss is arranged in the anti-falling groove of the adjusting sleeve.
In the above technical scheme, the main body height adjusting mechanism further comprises an adjusting sleeve limiting structure, the adjusting sleeve limiting structure comprises a limiting nut, the lower portion of the upper supporting seat is provided with the limiting nut, and the adjusting sleeve is rotated to be abutted against the limiting nut.
In the technical scheme, the upper end cover is provided with an upper connecting ring, an upper clamping ring and an upper bone grafting bin which are integrated or fixedly connected with each other and are sequentially arranged from top to bottom, the end surface of the upper connecting ring is provided with an upper anti-skidding surface and an anti-displacement upper tooth point, the anti-displacement upper tooth point is positioned on the inner side of the upper anti-skidding surface, the upper clamping ring is tightly matched with an inner hole of the upper supporting seat, the upper bone grafting bin is positioned in an inner cavity of the upper supporting seat, and the upper bone grafting bin is provided with upper long holes which are arranged in a honeycomb shape; the lower end cover has lower go-between, lower snap ring and the lower bone grafting storehouse that from top to bottom arranged in proper order of mutual as an organic whole or fixed connection, the terminal surface of go-between has down the antiskid face and prevents displacement down the prong, and prevents displacement down the prong and lie in the inboard of antiskid face down, the hole tight fit of snap ring and under bracing seat down, the bone grafting storehouse is located the inner chamber of under bracing seat down, and the bone grafting storehouse is equipped with down and is cellular lower growth slot hole of arranging down.
In the technical scheme, the last snap ring of upper end cover has two sets of openings that are symmetrical arrangement, is last flexure strip between the adjacent opening, go up the hole tight fit of flexure strip and last supporting seat, the lower snap ring of lower end cover has two sets of openings that are symmetrical arrangement, is lower flexure strip between the adjacent opening, the hole tight fit of lower flexure strip and lower carriage.
In the technical scheme, go up the supporting seat and have the connecting ring seat and be connected and evenly distributed's thread piece with last connecting ring seat, be the cartridge groove between the adjacent thread piece, the bottom suspension seat has lower connecting ring seat and is connected and evenly distributed's guide vane with lower connecting ring seat, is equipped with the guide way between the adjacent guide vane, go up the thread piece of supporting seat and the guide way sliding fit of bottom suspension seat, the guide vane of bottom suspension seat and the cartridge groove sliding fit of last supporting seat.
The invention has the positive effects that: after the vertebral body replacement device is adopted, the vertebral body replacement device also comprises a main body displacement-preventing auxiliary structure, wherein the main body displacement-preventing auxiliary structure comprises a plurality of supporting rods and a plurality of locking seats used for being connected with connecting rods, the two ends of the upper end cover and the lower end cover are respectively provided with the supporting rods, and each supporting rod is respectively connected with the corresponding locking seat, so that the main body structure, the main body displacement-preventing auxiliary structure and the connecting rods connected with the locking seats form an integrated structure, when the vertebral body replacement device is used, the main body structure is implanted between damaged vertebral bodies, the upper end cover and the lower end cover are respectively abutted against adjacent vertebral bodies, the locking seats are clamped on the connecting rods connected with pedicle screws, therefore, the main body structure is fixed by the main body displacement-preventing auxiliary structure and a traditional screw rod system to form an integrated frame type structure, and the main body structure is not displaced due to extrusion of the adjacent vertebral bodies, the defect of postoperative displacement of the traditional artificial vertebral body is overcome.
Drawings
FIG. 1 is a schematic view of the present invention assembled with a conventional nail and rod system;
FIG. 2 is a schematic structural diagram of an embodiment of the present invention;
FIG. 3 is a schematic perspective view of FIG. 2;
FIG. 4 is a perspective view of the locking socket of FIG. 2;
FIG. 5 is a schematic structural view of the support rod of FIG. 2;
FIG. 6 is a schematic view of the configuration of the locking cam of FIG. 2;
FIG. 7 is a schematic structural view of the body structure of FIG. 2;
FIG. 8 is a schematic sectional view A-A of FIG. 7;
FIG. 9 is a schematic perspective view of FIG. 7;
FIG. 10 is a perspective view of the upper support seat of FIG. 9;
FIG. 11 is a perspective view of the lower support base of FIG. 9;
FIG. 12 is a schematic view of the adjustment sleeve of FIG. 8;
FIG. 13 is a schematic structural view of the upper end cap of FIG. 9;
fig. 14 is a cross-sectional view of the upper attachable ear of fig. 13;
FIG. 15 is a schematic perspective view of FIG. 13;
fig. 16 is a schematic view of the structure of the lower end cap of fig. 9.
Detailed Description
The invention is further illustrated, but not limited, by the following examples in connection with the accompanying drawings.
As shown in fig. 1 to 16, a vertebral body replacement device comprises a main body structure 1, wherein the main body structure 1 comprises an upper supporting seat 11, a lower supporting seat 12, an upper end cover 13 and a lower end cover 14, the upper supporting seat 11 is in sliding fit with the lower supporting seat 12, the upper end cover 13 is arranged at the end of the upper supporting seat 11, the lower end cover 14 is arranged at the end of the lower supporting seat 12,
still prevent displacement auxiliary structure 3 including the main part, displacement auxiliary structure 3 is prevented to the main part includes a plurality of supporting rods 31 and a plurality of locking seat 32 that are used for being connected with the connective bar, the both ends of upper end cover 13 and lower end cover 14 are equipped with supporting rod 31 respectively, and every supporting rod 31 is connected with the locking seat 32 that corresponds respectively, makes the connective bar formation integral type structure that main part structure 1 and main part prevent displacement auxiliary structure 3 and be connected with locking seat 32.
As shown in fig. 3, 5, 13, 14, and 16, in order to adjust the support rods conveniently, two ends of the upper cover 13 are respectively provided with an upper engaging lug 131, the upper engaging lug 131 has an upper ball head inner hole 1311, a hole wall of the upper ball head inner hole 1311 is provided with a partial screw thread, two ends of the lower cover 14 are respectively provided with a lower engaging lug 141, the lower engaging lug 141 has a lower ball head inner hole 1411, a hole wall of the lower ball head inner hole 1411 is provided with a partial screw thread, one end of each support rod 31 has a ball head portion 311, a surface of the ball head portion 311 has an external screw thread, and the ball head portion 311 of each support rod 31 is respectively arranged in the upper ball head inner hole 1311 of the upper engaging lug 131 and the lower ball head inner hole 1 of the lower engaging lug. Half of the ball head hole of the connecting lug is provided with threads, and the other half of the ball head hole is a unthreaded hole, so that when the connecting lug is used, the ball head part 311 of the supporting rod 31 is screwed into the ball head inner hole of the connecting lug, and after the half of the ball head part 311 exceeds the half of the threads of the ball head hole, the ball head part can be ensured to rotate in any direction in the ball head hole, and the ball head part can be ensured not to fall off.
As shown in fig. 3, 4 and 6, the locking seat 32 has a support rod insertion hole 321, a connecting rod insertion groove 322 and a locking hole 323 which are mutually communicated, the other end of the support rod 31 has a flat surface 312, the other end of the support rod 31 is inserted into the support rod insertion hole 321, the flat surface 312 of the support rod 31 abuts against the hole wall of the support rod insertion hole 321, the connecting rod is clamped in the connecting rod insertion groove 322, a locking cam 33 is arranged in the locking hole 323, after the locking cam 33 is rotated, the locking cam 33 abuts against one side surface of the connecting rod, the other side surface of the connecting rod abuts against the support rod 31, and the support rod 31, the locking seat 32 and the connecting rod are locked into a whole. In order to make the structure more reasonable, be convenient for lock support rod and connective bar as an organic whole through the locking seat.
As shown in fig. 6, in order to lock the connecting rod and the supporting rod conveniently, the locking cam 33 includes a threaded connector 331 and a locking post 332 which are integrated with each other, the threaded connector 331 is in threaded connection with the locking hole 323, the threaded connector 331 has a hexagon socket 3311, the locking post 323 has an eccentric plane, and after the locking cam 33 is rotated, the eccentric plane of the locking cam 33 abuts against a side surface of the connecting rod. During the use, twist the instrument in the interior hexagonal hole and rotate the locking cam for threaded connection head and locking hole 323 threaded connection, until the eccentric plane of locking post 323 offsets with a side of connecting rod, and enable another side of connecting rod and support stick and offset, accomplish the locking of support rod and connecting rod.
As shown in fig. 7, 8, 9 and 10, in order to adjust the height of the main body conveniently, the invention further comprises a main body height adjusting mechanism 2, wherein the main body height adjusting mechanism 2 comprises an adjusting sleeve 21 and an anti-convolution mechanism for preventing the adjusting sleeve 21 from circling, the adjusting sleeve 21 is sleeved on the periphery of the end part of the lower supporting seat 12 and is positioned on the inner side of the upper end cover 13, the adjusting sleeve 21 is in threaded connection with the upper supporting seat 11, and the upper supporting seat 11 can move up and down relative to the lower supporting seat 12 by rotating the adjusting sleeve 21; the anti-convolution mechanism comprises a locking nut 22, the upper portion of the lower supporting seat 12 is provided with the locking nut 22 which is connected with the lower supporting seat through threads and is close to the adjusting sleeve 21, the adjusting sleeve 21 is provided with a plurality of tooth grooves 211, the locking nut 22 is rotated, the end portion of the locking nut 22 can be clamped in the tooth grooves 211 corresponding to the adjusting sleeve 21, the end portion of the locking nut 22 is provided with a limiting cylinder, the limiting cylinder is provided with a straight groove, the locking nut is screwed into the straight groove through a tool and is rotated, the limiting cylinder at the end portion of the locking nut 22 can be clamped in the tooth grooves corresponding to the adjusting sleeve 21, the adjusting sleeve 21 is positioned, and the adjusting sleeve can be effectively prevented from circling.
As shown in fig. 8, 11 and 12, in order to prevent the adjusting sleeve from falling off the lower support seat 12, an anti-falling groove 212 is provided on the inner wall of the adjusting sleeve 21, a boss 124 is provided at the end of the lower support seat 12, and the boss 124 is provided in the anti-falling groove 212 of the adjusting sleeve 21. Thus, the boss 124 of the lower support base 12 can be ensured to be always arranged in the anti-falling groove of the adjusting sleeve 21.
As shown in fig. 8 and 11, in order to limit the stroke of the adjusting sleeve, the main body height adjusting mechanism 2 further includes an adjusting sleeve limiting structure, the adjusting sleeve limiting structure includes a limiting nut 23, the limiting nut 23 is disposed at the lower portion of the upper support 11, and the adjusting sleeve 21 can be abutted against the limiting nut 23 by rotating. Therefore, when the upper support seat 11 moves upward relative to the lower support seat, the movable stroke is that the adjusting sleeve moves downward until the adjusting sleeve abuts against the limiting nut, so that the adjusting sleeve can be effectively prevented from falling off from the bottom of the lower support seat 12.
The main structure in the prior art comprises an upper supporting seat and a lower supporting seat, the main structure with matched size needs to be selected according to different positions of bone grafting, end covers with different sizes can be selected for vertebral body replacement at different positions, the main structure does not need to be changed, the manufacturing cost is reduced, the universality of the invention is wider, as shown in fig. 13, 14, 15 and 16, the upper end cover 13 is provided with an upper connecting ring 132, an upper clamping ring 133 and an upper bone grafting bin 134 which are mutually integrated or fixedly connected and are sequentially arranged from top to bottom, two ends of the upper connecting ring 132 are respectively provided with an upper connecting lug 131, the end surface of the upper connecting ring 132 is provided with an upper anti-skidding surface 135 and an upper anti-displacement tooth tip 136, the upper anti-displacement tooth tip 136 is positioned at the inner side of the upper skidding surface 135, the upper clamping ring 133 is tightly matched with an inner hole of the upper supporting seat 11, the upper bone grafting bin 134 is positioned in an inner cavity of the upper, the upper bone grafting bin 134 is provided with upper growth holes 137 which are arranged in a honeycomb shape; the lower end cover 14 has lower connecting ring 142, lower snap ring 143 and lower bone grafting storehouse 144 that from top to bottom arrange in proper order that each other is as an organic whole or fixed connection, the both ends of lower connecting ring 142 are equipped with engaging lug 141 down respectively, the terminal surface of lower connecting ring 142 has down non-skid surface 145 and prevents displacement down prong 146, and prevents displacement down prong 146 and be located the inboard of non-skid surface 145 down, snap ring 143 and the hole tight fit of lower support seat 12, bone grafting storehouse 144 is located the inner chamber of lower support seat 12 down, and bone grafting storehouse 144 is equipped with down and is cellular lower growth hole 147 who arranges. When the end cover is used, the proper end cover can be selected according to the bone grafting position, and the bone filling is supplemented into the bone grafting bin of the end cover according to the operation requirement, so that the situation that gaps exist between the implanted bone and the bone body of the end cover, the bone healing is influenced, and the bony growth is influenced is prevented. The end faces of the end covers are all inclined planes, and the inclined planes with different angles are selected according to actual needs. The upper end cover and the lower end cover are identical in structure.
As shown in fig. 13 and 16, in order to ensure that the snap ring of the end cap can be tightly tightened in the inner hole of the support seat to prevent falling off, the upper snap ring 133 of the upper end cap 13 has two sets of notches which are symmetrically arranged, an upper elastic sheet 138 is arranged between the adjacent notches, the upper elastic sheet 138 is tightly matched with the inner hole of the upper support seat 11, the lower snap ring 143 of the lower end cap 14 has two sets of notches which are symmetrically arranged, a lower elastic sheet 148 is arranged between the adjacent notches, and the lower elastic sheet 148 is tightly matched with the inner hole of the lower support seat 12. The periphery wall of the elastic sheet is provided with an arc-shaped bulge, and the arc-shaped bulge of the elastic sheet can be tightly tensioned in the inner hole of the supporting seat and tightly matched with the inner hole.
As shown in fig. 10 and 11, in order to make the main structure more reasonable, the upper support 11 and the lower support 12 are both cylindrical structures, the upper support 11 has an upper connection ring seat 111 and threaded pieces 112 connected with the upper connection ring seat 111 and uniformly distributed, an insertion groove 113 is formed between adjacent threaded pieces 112, the lower support 12 has a lower connection ring seat 121 and guide pieces 122 connected with the lower connection ring seat 121 and uniformly distributed, a guide groove 123 is formed between adjacent guide pieces 122, the threaded pieces 112 of the upper support 11 are in sliding fit with the guide groove 123 of the lower support 12, and the guide pieces 122 of the lower support 12 are in sliding fit with the insertion groove 113 of the upper support 11. The end of the guide piece 122 of the lower support seat 12 is provided with a boss 121. The insertion groove 113 is not only convenient to be matched with a guide sheet of the lower support seat, but also plays a role of a bone grafting window; the guide piece 122 is not only convenient to be matched with the inserting groove 113 of the upper supporting seat, but also provided with a bone filling hole on the guide piece 122, when the bone grafting instrument is implanted, the length of the main body structure of the bone grafting instrument is shortest, after the bone grafting instrument is implanted, the rotating sleeve is adjusted according to the damaged length between vertebral bodies, the upper supporting seat 11 moves relative to the lower supporting seat 12, so that the upper end cover and the lower end cover are abutted against the adjacent vertebral bodies without gaps, and bone grafting can be supplemented in the bone filling hole of the guide piece 122 of the upper supporting seat 11 and the lower supporting seat 12 according to the operation requirement, so that the situation that the bone grafting amount in the supporting seat is lack and gaps exist to influence the growth of subsequent.
When the invention is used, a main body structure 1 is implanted between damaged vertebral bodies in advance, the length of the main body structure 1 is adjusted according to the actual damaged length, namely, the adjusting sleeve 21 is rotated by a tool, the upper supporting seat 11 moves upwards relative to the lower supporting seat 12, after the length of the main body structure is adjusted, the locking nut 22 is rotated to enable the end part of the locking nut to be clamped in the tooth groove 211 corresponding to the adjusting sleeve 21, the adjusting sleeve 21 is positioned to prevent the complete set 21 from circling, bone grafting is secondarily supplemented into a bone grafting bin of an end cover according to the operation requirement to prevent gaps from being generated due to the lack of bone grafting amount in the supporting seat, the anti-slip end surfaces and the anti-displacement tooth tips of the upper end cover 13 and the lower end cover 14 are respectively abutted against the upper and lower adjacent vertebral body end surfaces to prevent the movement, after the main body structure is fixed, the two ends of the supporting rod are respectively connected with the locking seat 32 and the connecting lugs on the end cover, the connecting rod 4 connected with the pedicle, like this, prevent displacement auxiliary structure and tradition nail stick system with major structure utilization main part and fix, form integrative frame rack structure for the displacement that the major structure no longer caused because neighbouring centrum is crooked to its extrusion, the defect of traditional artifical centrum postoperative displacement has been solved.
In light of the foregoing description of the preferred embodiment of the present invention, many modifications and variations will be apparent to those skilled in the art without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.
Claims (10)
1. The utility model provides a centrum replacement device, includes major structure (1), major structure (1) includes supporting seat (11), lower supporting seat (12), upper end cover (13) and lower end cover (14), go up supporting seat (11) and lower supporting seat (12) sliding fit, establish at supporting seat (11) tip on upper end cover (13), the tip at lower supporting seat (12) is established in lower end cover (14), its characterized in that:
still prevent displacement auxiliary structure (3) including the main part, displacement auxiliary structure (3) are prevented including a plurality of support rods (31) and a plurality of locking seat (32) that are used for being connected with the connective bar to the main part, the both ends of upper end cover (13) and lower end cover (14) are equipped with support rod (31) respectively, and every support rod (31) are connected with locking seat (32) that correspond respectively, make main structure (1) and main part prevent displacement auxiliary structure (3) and with the connective bar formation integral type structure of being connected of locking seat (32).
2. The vertebral body replacement device of claim 1, wherein: both ends of upper end cover (13) are equipped with engaging lug (131) respectively, upper engaging lug (131) have last bulb hole (1311), and the pore wall of going up bulb hole (1311) is equipped with partial screw thread, the both ends of lower end cover (14) are equipped with engaging lug (141) down respectively, engaging lug (141) have down bulb hole (1411) down, and the pore wall of bulb hole (1411) down is equipped with partial screw thread, and the one end of every support rod (31) all has bulb portion (311), and the surface of bulb portion (311) has the external screw thread, and bulb portion (311) of every support rod (31) are established respectively in last bulb hole (1311) of upper engaging lug (131) and lower bulb hole (1411) of lower engaging lug (141).
3. The vertebral body replacement device of claim 1, wherein: locking seat (32) have supporting rod jack (321), connective bar draw-in groove (322) and the locking hole (323) that link up each other, the other end of supporting rod (31) has flat face (312), the other end of supporting rod (31) inserts in supporting rod jack (321), and the flat face (312) of supporting rod (31) offsets with the pore wall of supporting rod jack (321), and the connective bar card is in connective bar draw-in groove (322), be equipped with locking cam (33) in locking hole (323), rotate locking cam (33) after, locking cam (33) offset with a side of connective bar, another side of connective bar offsets with supporting rod (31), makes supporting rod (31), locking seat (32) and connective bar locking as an organic whole.
4. The vertebral body replacement device of claim 3, wherein: locking cam (33) are including threaded connection head (331) and locking post (332) as an organic whole each other, threaded connection head (331) and locking hole (323) threaded connection, and threaded connection head (331) have interior hexagonal hole (3311), locking post (323) have eccentric plane, rotate behind locking cam (33), the eccentric plane of locking cam (33) offsets with a side of connective bar.
5. The vertebral body replacement device of claim 1, wherein: the device is characterized by further comprising a main body height adjusting mechanism (2), wherein the main body height adjusting mechanism (2) comprises an adjusting sleeve (21) and an anti-convolution mechanism for preventing the adjusting sleeve (21) from circling round, the adjusting sleeve (21) is sleeved on the periphery of the end part of the lower supporting seat (12) and is positioned on the inner side of the upper end cover (13), the adjusting sleeve (21) is in threaded connection with the upper supporting seat (11), and the upper supporting seat (11) can move up and down relative to the lower supporting seat (12) by rotating the adjusting sleeve (21); the anti-convolution mechanism comprises a locking nut (22), the upper portion of the lower supporting seat (12) is provided with the locking nut (22) which is in threaded connection with the adjusting sleeve (21) in a position close to the adjusting sleeve (21), the adjusting sleeve (21) is provided with a plurality of tooth grooves (211), the locking nut (22) is rotated, and the end portion of the locking nut (22) can be clamped in the tooth groove (211) corresponding to the adjusting sleeve (21).
6. The vertebral body replacement device of claim 5, wherein: the inner wall of the adjusting sleeve (21) is provided with an anti-falling groove (212), the end part of the lower supporting seat (12) is provided with a boss (124), and the boss (124) is arranged in the anti-falling groove (212) of the adjusting sleeve (21).
7. The vertebral body replacement device of claim 5, wherein: the main body height adjusting mechanism (2) further comprises an adjusting sleeve limiting structure, the adjusting sleeve limiting structure comprises a limiting nut (23), the lower portion of the upper supporting seat (11) is provided with the limiting nut (23), and the adjusting sleeve (21) is rotated to be abutted against the limiting nut (23).
8. The vertebral body replacement device of claim 1, wherein: the upper end cover (13) is provided with an upper connecting ring (132), an upper clamping ring (133) and an upper bone grafting bin (134) which are integrated or fixedly connected and are sequentially arranged from top to bottom, the end face of the upper connecting ring (132) is provided with an upper anti-skidding surface (135) and an anti-displacement upper tooth tip (136), the anti-displacement upper tooth tip (136) is positioned on the inner side of the upper anti-skidding surface (135), the upper clamping ring (133) is tightly matched with an inner hole of the upper supporting seat (11), the upper bone grafting bin (134) is positioned in an inner cavity of the upper supporting seat (11), and the upper bone grafting bin (134) is provided with upper long holes (137) which are arranged in a honeycomb shape; lower end cover (14) have each other as an organic whole or fixed connection from top to bottom arrange in proper order down go up ring (142), snap ring (143) and plant bone storehouse (144) down, the terminal surface of go up ring (142) has down non-skid surface (145) and prevents displacement down prong (146), and prevents displacement down prong (146) and be located the inboard of non-skid surface (145) down, snap ring (143) and the hole tight fit of lower support seat (12) down, plant bone storehouse (144) down and be located the inner chamber of lower support seat (12), and plant bone storehouse (144) down and be equipped with down and grow slot hole (147) that are cellular arrangement.
9. The vertebral body replacement device of claim 8, wherein: last snap ring (133) of upper end cover (13) have two sets of openings that are symmetrical arrangement, be elastic sheet (138) between the adjacent opening, go up the hole tight fit of elastic sheet (138) and last supporting seat (11), lower snap ring (143) of lower end cover (14) have two sets of openings that are symmetrical arrangement, be lower elastic sheet (148) between the adjacent opening, the hole tight fit of lower elastic sheet (148) and lower supporting seat (12).
10. The vertebral body replacement device of claim 1, wherein: go up supporting seat (11) have connecting ring seat (111) and be connected and evenly distributed's screw thread piece (112) with last connecting ring seat (111), be cartridge groove (113) between adjacent screw thread piece (112), lower support seat (12) have lower connecting ring seat (121) and be connected and evenly distributed's guide vane (122) with lower connecting ring seat (121), are equipped with guide way (123) between adjacent guide vane (122), the guide way (123) sliding fit of screw thread piece (112) and lower support seat (12) of going up supporting seat (11), the guide vane (122) of lower support seat (12) and cartridge groove (113) sliding fit of going up supporting seat (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010225050.5A CN111281622A (en) | 2020-03-26 | 2020-03-26 | Vertebral body replacement device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010225050.5A CN111281622A (en) | 2020-03-26 | 2020-03-26 | Vertebral body replacement device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111281622A true CN111281622A (en) | 2020-06-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010225050.5A Pending CN111281622A (en) | 2020-03-26 | 2020-03-26 | Vertebral body replacement device |
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| CN (1) | CN111281622A (en) |
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| CN101631516A (en) * | 2007-03-13 | 2010-01-20 | 新特斯有限责任公司 | Adjustable intervertebral implant |
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