CN115054351B - Vertebral body supporting nail - Google Patents
Vertebral body supporting nail Download PDFInfo
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- CN115054351B CN115054351B CN202210719398.9A CN202210719398A CN115054351B CN 115054351 B CN115054351 B CN 115054351B CN 202210719398 A CN202210719398 A CN 202210719398A CN 115054351 B CN115054351 B CN 115054351B
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- barrel
- cap
- inner core
- outer sleeve
- nail
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- 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
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- 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
- A61B17/7074—Tools specially adapted for spinal fixation operations other than for bone removal or filler handling
-
- 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
- A61B17/88—Osteosynthesis instruments; Methods or means for implanting or extracting internal or external fixation devices
- A61B17/8866—Osteosynthesis instruments; Methods or means for implanting or extracting internal or external fixation devices for gripping or pushing bones, e.g. approximators
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- 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
- A61B2017/564—Methods for bone or joint treatment
Abstract
The invention discloses a vertebral body expanding support nail which comprises a nail body and a nail cap, wherein the nail body comprises an inner core, an outer sleeve and an expanding ball, the inner core is in threaded connection with the outer sleeve, the upper end and the lower end of the inner core extend out of the outer sleeve, the lower end of the inner core is provided with a conical nail head, the expanding ball is sleeved on the inner core between the conical nail head and the lower end of the outer sleeve, the nail cap comprises an upper nail cap and a pressurizing cap, the upper nail cap is of a cylindrical structure, the lower end of a cylindrical cavity of the upper nail cap is connected with the upper end of the outer sleeve, the upper end of the inner core extends to the upper end of the cylindrical cavity of the upper nail cap, the upper end of the inner core is in clamping sliding connection with the pressurizing cap, and the pressurizing cap is in clamping sliding connection with the upper nail cap. The purpose is to provide a centrum struts supporting nail, it can prop up the subsidence bone piece from the inside of fracture centrum, makes fracture centrum well reset, reduces the emergence of long-term complication.
Description
Technical Field
The invention relates to the field of medical appliances, in particular to a vertebral body supporting nail.
Background
For the patient with the burst fracture of the lumbar vertebra, the fixation and reduction mechanism of the pedicle screw rod system is to reduce the fracture vertebral body through indirect traction, the periphery of the fracture vertebral body can be effectively reduced by traction of the fibrous ring of the intervertebral disc, but the central bone block of the front middle column cannot be pulled for reduction, a central part collapse defect is formed, the reduction is insufficient, meanwhile, a cavity is formed in the vertebral body after the reduction, the front support is insufficient, the high-stage vertebral body can be further lost, even the degeneration of the intervertebral disc of the adjacent segment is caused, the backward protrusion deformity is even heavy, the residual lumbago and backache occur to some patients, and even the internal fixation fails.
Disclosure of Invention
The invention aims to solve the technical problem of providing a vertebral body supporting nail which can support collapsed bone blocks from the inside of a fractured vertebral body, so that the fractured vertebral body is well reset, and the occurrence of long-term complications is reduced.
The invention discloses a vertebral body expanding support nail, which comprises a nail body and a nail cap, wherein the nail body comprises an inner core, an outer sleeve and an expanding ball, the inner core is in threaded connection with the outer sleeve, the upper end and the lower end of the inner core extend out of the outer sleeve, the lower end of the inner core is provided with a conical nail head, the expanding ball is sleeved on the inner core between the conical nail head and the lower end of the outer sleeve, the nail cap comprises an upper nail cap and a pressing cap, the upper nail cap is of a cylindrical structure, the lower end of a cylindrical cavity of the upper nail cap is connected with the upper end of the outer sleeve, the upper end of the inner core extends to the upper end of a cylindrical cavity of the upper nail cap, the upper end of the inner core is in clamping sliding connection with a pressing cap, the pressing cap is in sliding connection with the upper nail cap in a clamping manner, the pressing cap can slide along the axial direction of the inner core and the upper nail cap, when the pressing cap slides upwards along the axial direction of the upper nail cap and is in sliding connection with the upper nail cap, the pressing cap is kept in sliding connection with the clamping and the pressing cap is still in sliding connection with the pressing cap, and when the pressing cap moves close to the lower end of the outer sleeve.
The invention relates to a vertebral body expanding support nail, wherein an upper lantern ring and a lower lantern ring are sleeved on an inner core between a conical nail head and the lower end of an outer sleeve, the upper lantern ring is propped against the lower end of the outer sleeve, the lower lantern ring is propped against the upper end of the conical nail head, a plurality of expanding sheets are fixedly connected between the upper lantern ring and the lower lantern ring, the expanding sheets are circumferentially arranged along the circumferential direction of the inner core, and when the conical nail head moves close to the lower end of the outer sleeve, the expanding sheets can be convexly deformed in the direction far away from the inner core.
The invention discloses a vertebral body expanding support nail, wherein two first support lugs are fixedly connected to an upper nail cap, and two second support lugs are fixedly connected to a pressurizing cap.
The invention discloses a cone-shaped supporting nail, wherein the upper nail cap comprises an upper cylinder body and a lower cylinder body which are integrally formed, the inner cylinder diameter of the upper cylinder body is larger than that of the lower cylinder body, the upper end of an outer sleeve is of a hollow prismatic structure, the lower part of a cylinder cavity of the lower cylinder body is of a prismatic shape matched with the upper end of the outer sleeve, a first clamping table is arranged on the upper part of the cylinder cavity of the lower cylinder body, the lower part of the cylinder cavity of the lower cylinder body is sleeved on the upper end of the outer sleeve, the upper end of the outer sleeve abuts against the first clamping table, and the upper end of an inner core penetrates through the cylinder cavity of the lower cylinder body and then extends into the cylinder cavity of the upper cylinder body.
The invention discloses a cone-shaped supporting nail, wherein the upper nail cap comprises an upper cylinder body and a lower cylinder body which are integrally formed, the inner cylinder diameter of the upper cylinder body is larger than that of the lower cylinder body, a sliding block is arranged on the outer side wall of the upper end of an outer sleeve, a sliding groove which is axially arranged is arranged at the lower part of a cylinder cavity of the lower cylinder body, a first clamping table is arranged at the upper part of the cylinder cavity of the lower cylinder body, the lower part of the cylinder cavity of the lower cylinder body is sleeved at the upper end of the outer sleeve, the sliding block is positioned in the sliding groove, the upper end of the outer sleeve is propped against the first clamping table, and the upper end of an inner core penetrates through the cylinder cavity of the lower cylinder body and then extends into the cylinder cavity of the upper cylinder body.
The invention discloses a cone-shaped supporting nail, wherein the upper nail cap comprises an upper cylinder body and a lower cylinder body which are integrally formed, the inner cylinder diameter of the upper cylinder body is larger than that of the lower cylinder body, an axially arranged sliding groove is formed in the outer side wall of the upper end of an outer sleeve, a sliding block is arranged at the lower part of a cylinder cavity of the lower cylinder body, a first clamping table is arranged at the upper part of the cylinder cavity of the lower cylinder body, the lower part of the cylinder cavity of the lower cylinder body is sleeved at the upper end of the outer sleeve, the sliding block is positioned in the sliding groove, the upper end of the outer sleeve abuts against the first clamping table, and the upper end of an inner core penetrates through the cylinder cavity of the lower cylinder body and then extends into the cylinder cavity of the upper cylinder body.
The invention discloses a cone body supporting nail, wherein a second clamping table is arranged on the outer cylinder wall of an outer sleeve, and the lower end of a lower cylinder body is propped against the second clamping table.
The invention relates to a cone body expanding support nail, wherein the upper end of an inner core is of a prismatic structure, a pressurizing cap is of a cylindrical structure, a cylindrical cavity of the pressurizing cap is of a prismatic shape matched with the upper end of the inner core, the pressurizing cap is sleeved at the upper end of the inner core, a clamping block is fixedly arranged on the outer cylinder wall of the pressurizing cap, an axially arranged clamping groove is arranged on the inner cylinder wall of the upper cylinder body, the clamping block is positioned in the clamping groove, the clamping block can slide along the clamping groove, and when the pressurizing cap slides upwards along the axial direction of the upper nail cap to enable the clamping block to be separated from the clamping groove, the pressurizing cap is still sleeved at the upper end of the inner core.
The invention discloses a cone body expanding support nail, wherein an axially arranged protruding block is arranged on the outer side wall of the upper end of an inner core, an axially arranged groove is arranged in a cylinder cavity of a pressurizing cap, the pressurizing cap is sleeved at the upper end of the inner core, the protruding block is positioned in the groove and can slide along the groove, a clamping block is fixedly arranged on the outer cylinder wall of the pressurizing cap, an axially arranged clamping groove is arranged on the inner cylinder wall of the upper cylinder body, the clamping block is positioned in the clamping groove, the clamping block can slide along the clamping groove, and when the pressurizing cap slides upwards along the axial direction of the upper nail cap to enable the clamping block to be separated from the clamping groove, the pressurizing cap is still sleeved at the upper end of the inner core and the protruding block is positioned in the groove.
The invention discloses a cone body expanding support nail, wherein an axially arranged groove is formed in the outer side wall of the upper end of an inner core, an axially arranged protruding block is arranged in a cylinder cavity of a pressurizing cap, the pressurizing cap is sleeved at the upper end of the inner core, the protruding block is positioned in the groove and can slide along the groove, a clamping block is fixedly arranged on the outer cylinder wall of the pressurizing cap, an axially arranged clamping groove is formed in the inner cylinder wall of the upper cylinder body, the clamping block is positioned in the clamping groove, the clamping block can slide along the clamping groove, and when the pressurizing cap slides upwards along the axial direction of the upper nail cap to enable the clamping block to be separated from the clamping groove, the pressurizing cap is still sleeved at the upper end of the inner core and the protruding block is positioned in the groove.
The invention is characterized in that when the invention is used, the conical nail head is aligned with the fracture cone, then the upper nail cap is rotated to screw the lower end of the nail body into the fracture cone, in the process, the nail body and the nail cap rotate as a whole, namely, the nail body and the nail cap, the parts of the nail body and the parts of the nail cap do not rotate relatively, then the pressing cap slides upwards along the axial direction of the upper nail cap, so that the pressing cap and the upper nail cap are in clamping sliding connection, at the moment, the pressing cap still keeps the clamping sliding connection with the inner core, then the upper nail cap and the outer sleeve are kept motionless, the pressing cap is rotated to drive the inner core to rotate, and because the inner core and the outer sleeve are in threaded connection, the inner core can move upwards relative to the outer sleeve, so that the conical nail head moves upwards to be close to the lower end of the outer sleeve, the expanding ball is expanded, the expanding ball can expand the bone blocks of the fracture cone, and then the outer sleeve and the inner core outside the fracture cone are cut. Therefore, the invention can prop open the collapsed bone blocks from the inside of the fractured vertebral body, so that the fractured vertebral body is well reset, and the occurrence of long-term complications is reduced.
The invention is further described below with reference to the accompanying drawings.
Drawings
FIG. 1 is a front view of a vertebral body distraction support pin of the present invention;
FIG. 2 is a front cross-sectional view of the vertebral body distraction support pin of the present invention;
FIG. 3 is a front view of the inner core of the present invention;
FIG. 4 is a top view of FIG. 3;
FIG. 5 is a front view of an outer sleeve of the present invention;
FIG. 6 is a front cross-sectional view of an outer sleeve of the present invention;
FIG. 7 is a top view of FIG. 5;
FIG. 8 is a front view of a distracting ball of the present invention (the distracting ball is in a contracted state);
FIG. 9 is a front view of a distracting ball of the present invention (the distracting ball is in a distracted state);
FIG. 10 is a top view of FIG. 9;
FIG. 11 is a front cross-sectional view of a distracting ball of the present invention (the distracting ball being distracted);
FIG. 12 is a front view of the upper nut of the present invention;
FIG. 13 is a front cross-sectional view of the upper nut of the present invention;
FIG. 14 is a top view of the upper nut of the present invention;
FIG. 15 is a bottom view of the upper nut of the present invention;
FIG. 16 is a front view of the pressurized cap of the present invention;
FIG. 17 is a front cross-sectional view of the pressurized cap of the present invention;
FIG. 18 is a left side view (and also a right side view) of the pressurized cap of the present invention;
FIG. 19 is a top view of the pressurized cap of the present invention;
FIG. 20 is a bottom view of the pressurized cap of the present invention;
FIG. 21 is a further front view of the inner core of the present invention;
FIG. 22 is a top view of FIG. 21;
FIG. 23 is a further front cross-sectional view of the pressurized cap of the present invention;
FIG. 24 is a further top view of the pressurized cap of the present invention;
FIG. 25 is a further front view of the outer sleeve of the present invention;
FIG. 26 is a top view of FIG. 25;
FIG. 27 is a further front cross-sectional view of the upper nut of the present invention;
FIG. 28 is a further bottom view of the upper nut of the present invention;
FIG. 29 is a view of a first embodiment of the use of the vertebral body distraction support pin of the present invention;
FIG. 30 is a second view of the use of the vertebral body distraction support pin of the present invention;
FIG. 31 is a top view of the inventive vertebral body distraction support pin of FIG. 29;
FIG. 32 is a top view of the inventive vertebral body distraction support pin of FIG. 30.
Detailed Description
As shown in fig. 1 and combined with fig. 2-32, the vertebral body expanding support nail comprises a nail body and a nail cap, wherein the nail body comprises an inner core 13, an outer sleeve 6 and an expanding ball 10, the inner core 13 is connected with the outer sleeve 6 in a threaded mode, the upper end 14 and the lower end of the inner core 13 extend out of the outer sleeve 6, a conical nail head 11 is arranged at the lower end of the inner core 13, the expanding ball 10 is sleeved on the inner core 13 between the conical nail head 11 and the lower end of the outer sleeve 6, the nail cap comprises an upper nail cap 4 and a pressing cap 12, the upper nail cap 4 is of a cylindrical structure, the lower end of a cylindrical cavity of the upper nail cap 4 is connected with the upper end 16 of the outer sleeve 6, the upper end 14 of the inner core 13 extends to the upper end of the cylindrical cavity of the upper nail cap 4, a pressing cap 12 is connected in a clamping sliding mode, the pressing cap 12 is connected between the pressing cap 12 and the upper nail cap 4 in a clamping sliding mode, the pressing cap 12 can slide along the axial direction of the inner core 13 and the upper nail cap 4, and the pressing cap 12 is kept close to the upper nail cap 4 in an expanding mode when the pressing cap is connected with the upper nail cap 4 in an axial direction, and the pressing cap is still connected with the upper nail cap 10 in a sliding mode when the pressing cap is in a sliding mode, and the pressing cap is kept close to the upper end of the pressing cap 12 is connected with the upper sliding cap 11 in a sliding mode.
As shown in fig. 29, 30, 31 and 32, when the invention is used, the conical nail head 11 is aligned with the fracture cone 22, then the upper nail cap 4 is rotated to screw the lower end of the nail body into the fracture cone 22, in the process, the nail body and the nail cap rotate as a whole, namely, the nail body and the nail cap, the parts of the nail body and the parts of the nail cap do not rotate relatively, then the pressing cap 12 is slid upwards along the axial direction of the upper nail cap 4, so that the pressing cap 12 and the upper nail cap 4 are in clamping sliding connection, at the moment, the pressing cap 12 still keeps clamping sliding connection with the inner core 13, then the upper nail cap 4 and the outer sleeve 6 are kept still, the pressing cap 12 is rotated, the pressing cap 12 drives the inner core 13 to rotate, and because of the threaded connection between the inner core 13 and the outer sleeve 6, the inner core 13 can move upwards relative to the outer sleeve 6, and then the conical nail head 11 moves upwards to be close to the lower end of the outer sleeve 6, so that the expanding ball 10 is expanded, and the expanding ball 10 in the expanding state can jack the fracture cone 22 to the fracture cone, and then the outer sleeve of the fracture cone 22 is collapsed, and the outer sleeve 6 can be obtained. Therefore, the invention can open the collapsed bone blocks from the inside of the fractured vertebral body 22, so that the fractured vertebral body 22 is well reset, and the occurrence of long-term complications is reduced.
As shown in fig. 8-11, in combination with fig. 29-32, the expanding ball 10 comprises an upper sleeve ring 7 and a lower sleeve ring 9, the upper sleeve ring 7 and the lower sleeve ring 9 are sleeved on an inner core 13 between the conical nail head 11 and the lower end of the outer sleeve 6, the upper sleeve ring 7 is propped against the lower end of the outer sleeve 6, the lower sleeve ring 9 is propped against the upper end of the conical nail head 11, a plurality of expanding pieces 8 are fixedly connected between the upper sleeve ring 7 and the lower sleeve ring 9, a plurality of expanding pieces 8 are circumferentially arranged along the circumferential direction of the inner core 13, and when the conical nail head 11 moves close to the lower end of the outer sleeve 6, the expanding pieces 8 can be convexly deformed in a direction away from the inner core 13, namely expanded.
As shown in fig. 1, 2 and 29-32, and in combination with fig. 12-20, two first lugs 5 are fixedly connected to the upper nut 4, and two second lugs 1 are fixedly connected to the pressing cap 12. The two first lugs 5 are respectively and fixedly connected to the two opposite sides of the upper nail cap 4, and the two second lugs 1 are respectively and fixedly connected to the two opposite sides of the pressurizing cap 12. By providing lugs, the upper nut 4 and the compression cap 12 can be easily rotated.
As shown in fig. 2, 29-32, and in combination with fig. 12-15, the upper nut 4 includes an integrally formed upper cylinder 2 and lower cylinder 3, the inner cylinder diameter of the upper cylinder 2 is larger than the inner cylinder diameter of the lower cylinder 3, and the outer cylinder diameter of the upper cylinder 2 is also larger than the outer cylinder diameter of the lower cylinder 3. The two first lugs 5 are respectively and fixedly connected to the two opposite sides of the lower cylinder 3. Referring to fig. 5, 6 and 7, the upper end 16 of the outer sleeve 6 is of a hollow prismatic structure, the lower part of the barrel cavity of the lower barrel 3 is of a prismatic shape matched with the upper end 16 of the outer sleeve 6, a first clamping table 20 is arranged on the upper part of the barrel cavity of the lower barrel 3, the lower part of the barrel cavity of the lower barrel 3 is sleeved on the upper end 16 of the outer sleeve 6, the upper end 16 of the outer sleeve 6 abuts against the first clamping table 20, and the upper end 14 of the inner core 13 extends into the barrel cavity of the upper barrel 2 after penetrating through the barrel cavity of the lower barrel 3.
In this embodiment, the upper end 16 of the outer sleeve 6 has a hollow triangular prism structure, and the lower part of the barrel cavity of the lower barrel 3 is also triangular prism-shaped. As for the first chuck 20, it is formed by: the upper part of the cylinder cavity of the lower cylinder 3 is cylindrical, and the aperture of the cylindrical cylinder cavity is smaller than that of the lower Fang Sanleng cylindrical cylinder cavity, so that the first clamping table 20 is formed between the upper part and the lower part of the cylinder cavity of the lower cylinder 3, namely, the first clamping table 20 is formed on the upper part of the cylinder cavity of the lower cylinder 3.
In addition to the above-described manner of connecting the lower cylinder 3 with the outer sleeve 6, it may also be connected by: as shown in fig. 25, and in combination with fig. 26-28, the outer side wall of the upper end 16 of the outer sleeve 6 is provided with a sliding block 51, the lower part of the barrel cavity of the lower barrel 3 is provided with an axially arranged sliding groove 52, and after the lower part of the barrel cavity of the lower barrel 3 is sleeved on the upper end 16 of the outer sleeve 6, the sliding block 51 is positioned in the sliding groove 52. Of course, the positions of the sliding block 51 and the sliding groove 52 may be exchanged, that is, the outer side wall of the upper end 16 of the outer sleeve 6 is provided with the sliding groove 52 axially arranged, the sliding block 51 is arranged at the lower part of the barrel cavity of the lower barrel 3, and after the lower part of the barrel cavity of the lower barrel 3 is sleeved at the upper end 16 of the outer sleeve 6, the sliding block 51 is positioned in the sliding groove 52.
After the lower part of the barrel cavity of the lower barrel 3 is sleeved at the upper end 16 of the outer sleeve 6, the lower barrel 3 and the upper end 16 of the outer sleeve 6 can be in interference fit or clearance fit, and because the two fit modes can ensure that the upper nut 4 and the outer sleeve 6 rotate together or do not rotate, namely, when the upper nut 4 rotates, the upper nut 4 can drive the outer sleeve 6 to synchronously rotate, and when the upper nut 4 does not rotate, the outer sleeve 6 does not rotate.
As shown in fig. 2, 29-32 and in combination with fig. 5, 6 and 7, the outer wall of the outer sleeve 6 is provided with a second clamping table 17, and the lower end of the lower cylinder 3 abuts against the second clamping table 17, so that the lower cylinder 3 is more tightly matched with the outer sleeve 6. The second card 17 is formed by: regardless of how the upper end 16 of the outer sleeve 6 is connected to the lower cylinder 3, a second clamping seat 17 is formed between the upper end and the lower end as long as the upper end 16 of the outer sleeve 6 has a smaller outer diameter than the lower end, and as shown in fig. 5, 6 and 7, the outer diameters of three sides of the hollow triangular prism structure at the upper end of the outer sleeve 6 are smaller than the outer diameter of the lower end of the outer sleeve 6, so that the second clamping seat 17 is formed between the upper end and the lower end of the outer sleeve 6.
As shown in fig. 2, 29-32, and in combination with fig. 3, 4, 13, 14, 16-20, the upper end 14 of the inner core 13 is of a prismatic structure, the pressure cap 12 is of a cylindrical structure, the cylindrical cavity of the pressure cap 12 is of a prismatic shape matched with the upper end 14 of the inner core 13, the pressure cap 12 is sleeved at the upper end 14 of the inner core 13, a clamping block 21 is fixedly arranged on the outer cylinder wall of the pressure cap 12, an axially arranged clamping groove 19 is arranged on the inner cylinder wall of the upper cylinder 2, the clamping block 21 is positioned in the clamping groove 19, the clamping block 21 can slide along the clamping groove 19, and when the pressure cap 12 slides upwards along the axial direction of the upper nail cap 4 to enable the clamping block 21 to be separated from the clamping groove 19, the pressure cap 12 is still sleeved at the upper end 14 of the inner core 13.
In this embodiment, the upper end 14 of the inner core 13 has a triangular prism structure, and the cylindrical cavity of the pressing cap 12 is triangular prism shape, so that after the pressing cap 12 is sleeved on the upper end 14 of the inner core 13, the pressing cap 12 is in a clamping sliding connection, that is, the pressing cap 12 can slide up and down along the axial direction of the inner core 13, but the pressing cap 12 cannot rotate circumferentially relative to the inner core 13, but only when the pressing cap 12 rotates, it drives the inner core 13 to synchronously rotate together, and when the pressing cap 12 does not rotate, the inner core 13 does not rotate.
The pressurizing cap 12 and the upper nut 4 are connected in a clamping sliding manner through the clamping block 21 and the clamping groove 19, namely, the pressurizing cap 12 can slide up and down along the axial direction of the upper nut 4, and at the moment, the clamping block 21 slides up and down along the clamping groove 19, but due to the limiting effect of the clamping block 21 and the clamping groove 19, the pressurizing cap 12 cannot rotate circumferentially relative to the upper nut 4, but only synchronously rotates, namely, when the upper nut 4 rotates, the pressurizing cap 12 is driven to synchronously rotate together. When the pressing cap 12 slides upwards along the axial direction of the upper nut 4 to enable the clamping block 21 to be separated from the clamping groove 19, the clamping sliding connection between the pressing cap 12 and the upper nut 4 is released, at this time, the pressing cap 12 is still sleeved at the upper end 14 of the inner core 13, namely, the clamping sliding connection is still kept between the pressing cap 12 and the upper nut, the pressing cap 12 is rotated at this time, the pressing cap 12 can drive the inner core 13 to rotate together relative to the upper nut 4, and for convenience in operation, the clamping block 21 can slide against the upper end face of the upper cylinder 2 when the pressing cap 12 is rotated (as shown in fig. 30). Because the upper nut 4 and the outer sleeve 6 keep synchronous rotation or do not rotate, and the inner core 13 and the outer sleeve 6 are in threaded connection, when the pressing cap 12 drives the inner core 13 to rotate relative to the upper nut 4, the inner core 13 also rotates relative to the outer sleeve 6, so that the inner core 13 can move upwards relative to the outer sleeve 6, the conical nail head 11 at the lower end of the inner core 13 moves close to the lower end of the outer sleeve 6, the upper lantern ring 7 and the lower lantern ring 9 of the expanding ball 10 are further extruded, the two lantern rings move close to each other, and the expanding piece 8 is convexly deformed in a direction away from the inner core 13, namely in an expanding state, as shown in fig. 30.
As shown in fig. 3 and 6, the outer side wall of the conical head 11 is provided with a screw thread, so that the conical head 11 can be conveniently screwed into the fracture cone 22. The outer wall of the core body between the two ends of the inner core 13 is also provided with an external thread 15, the inner wall of the outer sleeve 6 is provided with an internal thread 18, the inner core 13 and the outer sleeve 6 are in threaded connection through the external thread 15 and the internal thread 18, when the inner core 13 rotates relative to the outer sleeve 6, the inner core 13 can move upwards or downwards relative to the outer sleeve 6, and in the embodiment, in order to enable the conical pin head 11 to move close to the lower end of the outer sleeve 6, the expanding ball 10 is in an expanding state, and only the inner core 13 can move upwards relative to the outer sleeve 6.
Of course, the snap-fit sliding connection between the pressing cap 12 and the upper end of the inner core 13 can also be achieved by: as shown in fig. 21 and in combination with fig. 22-24, the outer side wall of the upper end 14 of the inner core 13 is provided with an axially arranged protrusion 49, the barrel cavity of the pressing cap 12 is provided with an axially arranged groove 50, when the pressing cap 12 is sleeved on the upper end 14 of the inner core 13, the protrusion 49 is positioned in the groove 50, the protrusion 49 can slide along the groove 50, and when the pressing cap 12 slides upwards along the axial direction of the upper nut 4 to separate the clamping block 21 from the clamping groove 19, the pressing cap 12 is still sleeved on the upper end 14 of the inner core 13 and the protrusion 49 is positioned in the groove 50. Of course, the positions of the protruding blocks 49 and the grooves 50 may be exchanged, that is, the outer side wall of the upper end 14 of the inner core 13 is provided with the axially arranged grooves 50, and the barrel cavity of the pressurizing cap 12 is provided with the axially arranged protruding blocks 49. Under the limiting action of the protruding block 49 and the groove 50, the pressing cap 12 can slide up and down along the axial direction of the inner core 13, in the process, the protruding block 49 also slides up and down along the groove 50, but the pressing cap 12 cannot rotate circumferentially relative to the inner core 13, when the pressing cap 12 rotates, the pressing cap 12 drives the inner core 13 to synchronously rotate, and when the pressing cap 12 does not rotate, the inner core 13 cannot rotate.
29-32, when the invention is used, the conical pin head 11 is aligned with the fractured cone 22, then the upper pin cap 4 is rotated through the first supporting lug 5, the lower end of the pin body is screwed into the fractured cone 22, in the process, the pin body and the pin cap rotate as a whole, namely, the pin body and the pin cap, the parts of the pin body and the parts of the pin cap do not rotate relatively, then the pressure cap 12 is slid upwards along the axial direction of the upper pin cap 4, the clamping sliding connection between the pressure cap 12 and the upper pin cap 4 is released (namely, the clamping block 21 is separated from the clamping groove 19), at the moment, the pressure cap 12 still keeps the clamping sliding connection with the inner core 13, then the upper pin cap 4 and the outer sleeve 6 are kept motionless, and the pressure cap 12 drives the inner core 13 to rotate through the rotation of the second supporting lug 1, and because the inner core 13 and the outer sleeve 6 are in threaded connection, the inner core 13 can move upwards relative to the outer sleeve 6, and then the conical pin head 11 moves upwards to be close to the lower end of the outer sleeve 6, so that the expansion ball 10 is expanded, and the bone 22 in the fractured cone 10 is expanded, and the fractured cone 22 is collapsed. After completion of the reduction operation, the distracting ball 10 and portions of the inner core 13 and outer sleeve 6 remain within the fractured vertebral body 22 and are no longer removed. The distracting ball 10 within the fractured vertebral body 22 can remain distracted due to the threaded connection between the inner core 13 and the outer sleeve 6 remaining on the fractured vertebral body 22. Therefore, the invention can open the collapsed bone blocks from the inside of the fractured vertebral body 22, so that the fractured vertebral body 22 is well reset, and the occurrence of long-term complications is reduced.
The invention can realize inward expansion of the compressed cone after the vertebral injury is nailed, so that the cone is better in reduction, the anterior approach is supported, the occurrence of long-term internal fixation failure is greatly avoided, and simultaneously, the materials of the expansion ball 10, the inner core 13 and the outer sleeve 6 are titanium alloy or tantalum metal, the compatibility with bones is better, and better bone healing and bone ingrowth are realized.
It should be noted that, the positional or positional relationship indicated by the terms such as "center", "upper", "lower", "front", "rear", "left", "right", "middle", etc. are based on the positional or positional relationship shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or element referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "connected," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
The above examples are only illustrative of the preferred embodiments of the present invention and are not intended to limit the scope of the present invention, and various modifications and improvements made by those skilled in the art to the technical solution of the present invention should fall within the scope of protection defined by the claims of the present invention without departing from the spirit of the present invention.
Claims (10)
1. A centrum struts support nail which characterized in that: including nail body and nut, the nail body includes inner core, outer sleeve and struts the ball, inner core threaded connection is in the outer sleeve, the upper end and the lower extreme of inner core all extend to outside the outer sleeve, the lower extreme of inner core is equipped with the toper pin head, the cover is equipped with struts the ball on the inner core between toper pin head and the outer sleeve lower extreme, the nut includes upper nut and pressurization cap, the upper nut is tubular structure, the section of thick bamboo chamber lower extreme of upper nut is connected in the upper end of outer sleeve, the upper end of inner core extends to the section of thick bamboo chamber upper end of upper nut, the upper end block sliding connection of inner core has the pressurization cap, be block sliding connection between pressurization cap and the upper nut, the pressurization cap can be along the axial slip of inner core and upper nut, when the axial upward slip of upper nut and upper nut release block sliding connection, the pressurization cap still keeps block sliding connection with the inner core, when the lower extreme that the toper outer sleeve is close to struts the ball.
2. The vertebral body distraction support pin of claim 1, wherein: the expanding ball comprises an upper sleeve ring and a lower sleeve ring, the upper sleeve ring and the lower sleeve ring are sleeved on an inner core between the conical nail head and the lower end of the outer sleeve, the upper sleeve ring is propped against the lower end of the outer sleeve, the lower sleeve ring is propped against the upper end of the conical nail head, a plurality of expanding pieces are fixedly connected between the upper sleeve ring and the lower sleeve ring, the expanding pieces are circumferentially arranged along the inner core, and when the conical nail head moves close to the lower end of the outer sleeve, the expanding pieces can be convexly deformed in a direction away from the inner core.
3. The vertebral body distraction support pin of claim 2, wherein: the upper nail cap is fixedly connected with two first lugs, and the pressurizing cap is fixedly connected with two second lugs.
4. A vertebral body distraction support pin according to claim 3, characterized in that: the upper nail cap comprises an upper barrel and a lower barrel which are integrally formed, the inner barrel diameter of the upper barrel is larger than that of the lower barrel, the upper end of the outer sleeve is of a hollow prismatic structure, the lower part of the barrel cavity of the lower barrel is of a prismatic shape matched with the upper end of the outer sleeve, a first clamping table is arranged on the upper part of the barrel cavity of the lower barrel, the lower part of the barrel cavity of the lower barrel is sleeved at the upper end of the outer sleeve, the upper end of the outer sleeve abuts against the first clamping table, and the upper end of the inner core penetrates through the barrel cavity of the lower barrel and then extends into the barrel cavity of the upper barrel.
5. A vertebral body distraction support pin according to claim 3, characterized in that: the upper nail cap comprises an upper barrel and a lower barrel which are integrally formed, the inner barrel diameter of the upper barrel is larger than that of the lower barrel, a sliding block is arranged on the outer side wall of the upper end of the outer sleeve, an axially arranged sliding groove is arranged at the lower portion of a barrel cavity of the lower barrel, a first clamping table is arranged at the upper portion of the barrel cavity of the lower barrel, the lower portion of the barrel cavity of the lower barrel is sleeved at the upper end of the outer sleeve, the sliding block is located in the sliding groove, the upper end of the outer sleeve abuts against the first clamping table, and the upper end of the inner core penetrates through the barrel cavity of the lower barrel and then extends into the barrel cavity of the upper barrel.
6. A vertebral body distraction support pin according to claim 3, characterized in that: the upper nail cap comprises an upper barrel and a lower barrel which are integrally formed, the inner barrel diameter of the upper barrel is larger than that of the lower barrel, an axially arranged sliding groove is formed in the outer side wall of the upper end of the outer sleeve, a sliding block is arranged at the lower portion of a barrel cavity of the lower barrel, a first clamping table is arranged at the upper portion of the barrel cavity of the lower barrel, the lower portion of the barrel cavity of the lower barrel is sleeved at the upper end of the outer sleeve, the sliding block is located in the sliding groove, the upper end of the outer sleeve abuts against the first clamping table, and the upper end of the inner core penetrates through the barrel cavity of the lower barrel and then extends into the barrel cavity of the upper barrel.
7. The vertebral body distraction support pin of claim 4, 5 or 6, wherein: the outer tube wall of the outer sleeve is provided with a second clamping table, and the lower end of the lower tube body is propped against the second clamping table.
8. The vertebral body distraction support pin of claim 7, wherein: the upper end of inner core is prismatic structure, the pressure cap is tubular structure, the section of thick bamboo chamber of pressure cap is with the upper end assorted prismatic of inner core, the pressure cap suit is in the upper end of inner core, the fixed fixture block that is equipped with on the outer section of thick bamboo wall of pressure cap, be equipped with the draw-in groove of axial arrangement on the inner wall of last barrel, the fixture block is located the draw-in groove, the fixture block can slide along the draw-in groove, the pressure cap makes the fixture block break away from the draw-in groove along the axial upward slip of last nail cap when, the pressure cap still suit is in the upper end of inner core.
9. The vertebral body distraction support pin of claim 7, wherein: the utility model discloses a press cap, including inner core, pressing cap, upper end lateral wall, pressing cap, clamping block, upper end lateral wall and lug, be equipped with the lug of axial arrangement on the upper end lateral wall of inner core, the barrel intracavity of pressing cap is equipped with the recess of axial arrangement, pressing cap suit is in the upper end of inner core, the lug is located the recess, the lug is equipped with the fixture block on the outer wall of pressing cap, be equipped with the draw-in groove of axial arrangement on the inner wall of last barrel, the fixture block is located the draw-in groove, the fixture block can slide along the draw-in groove, pressing cap makes the fixture block break away from the draw-in groove along the axial upward slip of last nut, pressing cap still suit is in the upper end of inner core and the lug is located the recess.
10. The vertebral body distraction support pin of claim 7, wherein: the upper end lateral wall of inner core is last to be equipped with the recess of axial arrangement, the section of thick bamboo intracavity of pressurization cap is equipped with the lug of axial arrangement, the pressurization cap suit is in the upper end of inner core, the lug is located the recess, the lug can follow the recess and slide, the fixed fixture block that is equipped with on the outer section of thick bamboo wall of pressurization cap, be equipped with the draw-in groove of axial arrangement on the inner wall of last barrel, the fixture block is located the draw-in groove, the fixture block can follow the draw-in groove and slide, the pressurization cap is when upwards slided along the axial of last nail cap and make the fixture block break away from the draw-in groove, the pressurization cap still overlaps the upper end of dress at the inner core and the lug is located the recess.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210719398.9A CN115054351B (en) | 2022-06-23 | 2022-06-23 | Vertebral body supporting nail |
| PCT/CN2022/117182 WO2023245877A1 (en) | 2022-06-23 | 2022-09-06 | Vertebra support nail |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210719398.9A CN115054351B (en) | 2022-06-23 | 2022-06-23 | Vertebral body supporting nail |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115054351A CN115054351A (en) | 2022-09-16 |
| CN115054351B true CN115054351B (en) | 2023-05-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210719398.9A Active CN115054351B (en) | 2022-06-23 | 2022-06-23 | Vertebral body supporting nail |
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| CN (1) | CN115054351B (en) |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2442741B1 (en) * | 2009-06-17 | 2014-11-05 | Trinity Orthopedics, LLC | Expanding intervertebral device and methods of use |
| TWI503097B (en) * | 2012-10-23 | 2015-10-11 | Spirit Spine Holdings Corp Inc | Bone fixation device |
| CN205572249U (en) * | 2016-05-03 | 2016-09-14 | 石家庄启腾机械制造有限公司 | Screw rod locking device |
| CN207613859U (en) * | 2017-05-25 | 2018-07-17 | 熊鹰 | A kind of casing type pressure peg |
| JP7217498B2 (en) * | 2018-09-27 | 2023-02-03 | 株式会社NejiLaw | Male threaded body with cap, male threaded body and cap |
| CN211325518U (en) * | 2019-10-30 | 2020-08-25 | 赵凯 | Scalable expander |
| CN211924999U (en) * | 2020-04-05 | 2020-11-13 | 江苏华杰不锈钢制品有限公司 | Bolt with adjustable length |
| CN112220546A (en) * | 2020-10-30 | 2021-01-15 | 宁波华科润生物科技有限公司 | Can strut percutaneous bone cement pedicle of vertebral arch nail |
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| CN115054351A (en) | 2022-09-16 |
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