CN213098542U - Artificial vertebral body implanted by vertical pressurization - Google Patents
Artificial vertebral body implanted by vertical pressurization Download PDFInfo
- Publication number
- CN213098542U CN213098542U CN202021502724.3U CN202021502724U CN213098542U CN 213098542 U CN213098542 U CN 213098542U CN 202021502724 U CN202021502724 U CN 202021502724U CN 213098542 U CN213098542 U CN 213098542U
- Authority
- CN
- China
- Prior art keywords
- vertebral body
- bone grafting
- driving
- grafting screw
- screw
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Prostheses (AREA)
Abstract
The utility model provides an artificial vertebral body implanted by vertical pressurization, which comprises a vertebral body, a bone grafting screw, a driving part and a transition part, wherein a holding cavity is arranged in the vertebral body, a plurality of conical bulges are arranged on one end surface of the vertebral body, a penetrating hole communicated with the holding cavity is arranged on the other end surface, the transition part and the bone grafting screw are arranged in the holding cavity, the pointed end of the bone grafting screw is arranged towards the penetrating hole, the driving part is provided with a control end and a driving end, the driving end penetrates through the side wall of the vertebral body and is connected with the transition part in a transmission way, the upper end of the transition part is provided with a driving part, the driving part is matched with the driving end of the driving part, the lower end of the transition part is provided with a slideway arranged along the length direction of the bone grafting screw, the nut end of the bone grafting screw is connected with the slideway in a sliding way, and, the driving component drives the bone grafting screw to coaxially rotate through the transition component, and the elastic pressurizing component pushes the bone grafting screw to slide along the vertical direction.
Description
Technical Field
The utility model relates to the technical field of medical prosthesis, in particular to an artificial vertebral body implanted by vertical pressurization.
Background
In the treatment of human spinal disorders, vertebrectomy has to be performed due to spinal tumors, tuberculosis and severe fractures, often resulting in vertebral body destruction, possibly leading to spinal nerve damage. The stability of the spine needs to be reconstructed after the vertebral body is removed, and the artificial vertebral body replacement provides an ideal method for treating the diseases. Since the first report of vertebral body tumor resection and prosthesis replacement in the last 60 years of the last century, artificial vertebral bodies have been widely used clinically as an effective vertebral body substitute.
However, clinical application and a series of biomechanical tests show that the traditional artificial vertebral body has some problems to be solved in some aspects, in particular, the stability in the aspect of axial rotation after operation is not enough, and the early bonding strength with the upper vertebral body and the lower vertebral body is low, so that the implant is easy to shift and even fall out. In order to ensure that the bone quantity of the central bone grafting hole causes the design areas of the upper and lower end plates of the artificial vertebral body to be reduced, and the supporting force is insufficient, so that the artificial vertebral body sinks into the end plates of the upper and lower vertebral bodies to finally lose the ideal height.
In order to reduce the influence of the above problems, one has to additionally implement an anterior or posterior nail plate or rod fixation system while implanting the artificial vertebral body in order to improve the stability in the early and bone fusion stages. In the prior art, either anterior or posterior nail plate or rod fixation systems are typically attached to the artificial vertebral body by transverse screws. The joint of the transverse screw and the artificial vertebral body is matched with the threaded hole through external threads. Found in clinical and biomechanics test, after a period of use, the cooperation of above-mentioned external screw thread and screw hole is stable inadequately, appears the condition that the screw thread is deviate from easily, and the bone grafting screw transversely implants the human body after, owing to receive the gravity principle, can produce great shearing force, causes the screw very easily by the rupture, and then leads to the aversion of artifical centrum main part to deviate from even.
SUMMERY OF THE UTILITY MODEL
The utility model provides an artificial vertebral body implanted by vertical pressurization, which is used for solving the technical problem provided by the prior art.
The embodiment of the utility model provides an artificial vertebral body implanted by vertical pressurization, which comprises a vertebral body, a bone grafting screw, a driving part and a transition part, wherein the interior of the vertebral body is provided with a holding cavity, one end face of the vertebral body is provided with a plurality of conical protrusions, the other end face is provided with a penetrating hole communicated with the holding cavity, the transition part and the bone grafting screw are arranged in the holding cavity, the tip end of the bone grafting screw faces the penetrating hole, the driving part is provided with a control end and a driving end, the driving end penetrates through the side wall of the vertebral body and is in transmission connection with the transition part, the upper end of the transition part forms a driving part, the driving part is matched with the driving end of the driving part, the lower end of the transition part forms a slide way arranged along the length direction of the bone grafting screw, the nut end of the bone grafting screw is in sliding connection with the slide way, and an elastic pressurizing part which is vertically compressed is arranged between the bone grafting screw and the transition part, the driving part drives the bone grafting screw to coaxially rotate through the transition part, and the elastic pressurizing part pushes the bone grafting screw to slide along the vertical direction.
Preferably, the control end of the driving part is arranged along the radial direction of the central axis of the vertebral body, the driving end of the driving part is a first helical gear coaxially and fixedly arranged with the control end, the upper end of the transition part is a second helical gear meshed and connected with the first helical gear, the central axes of the first helical gear and the second helical gear are mutually perpendicular, and the second helical gear and the bone grafting screw are coaxially arranged.
Preferably, the lower end of the transition part is a guide part, a vertical guide groove is formed in the guide part, a radial protruding limiting part is arranged on a nut of the bone grafting screw, and the protruding limiting part is correspondingly embedded in the guide groove.
Preferably, a plurality of longitudinal guide grooves are circumferentially distributed on the guide part, a plurality of radial protruding limiting parts are circumferentially arranged on a nut of the bone grafting screw, and the protruding limiting parts are correspondingly nested in the guide grooves one to one.
Preferably, a coaxial connecting rod is arranged between the control end and the driving end of the driving part, the diameter of the control end is larger than that of the connecting rod, and the end face of the control end is embedded in the side wall of the vertebral body.
Preferably, a polygonal inner groove is formed in the center of the end face of the control end of the driving part, and the polygonal inner groove and the control end are coaxially arranged.
Preferably, the diameter of the penetrating hole is larger than the diameter of a stud of the bone grafting screw and smaller than the diameter of a nut of the bone grafting screw.
Preferably, the elastic pressurizing member is a spring.
The utility model relates to a vertical pressurization implanted artificial vertebral body, which is characterized in that a bone grafting screw is implanted into the vertebral body, a through hole is arranged at the tip part of the bone grafting screw, then the force vertical to the length direction of the vertebral body is converted into the force vertical to the bone grafting screw by a driving part, and the bone grafting screw is pushed to rotate and move out from the interior of the vertebral body along the vertical direction and is vertically nailed into the artificial vertebral body; artifical centrum adopts the mode of will planting the bone screw and squeeze into along human vertebra axis perpendicularly, does not increase other outstanding structures in the vertebra body, has avoided the foreign matter sense of prosthetic implantation and horizontal or slant to squeeze into the problem that the bone screw that plants that the bone screw appears easily is easily broken and deviate from, simultaneously elasticity pressure boost part provides vertical ascending pressure for planting the bone screw, for the power that the bone screw provides the vertical nail and goes into, guarantees to plant bone screw vertical rotation and follows closely in human backbone.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
The technical solution of the present invention is further described in detail by the accompanying drawings and examples.
Drawings
The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention, and together with the description serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 is an external structural view of an artificial vertebral body implanted with vertical pressurization according to embodiment 1 of the present invention;
FIG. 2 is a cross-sectional view taken along A-A of FIG. 1;
fig. 3 is an exploded view of an artificial vertebral body implanted with vertical pressurization according to embodiment 1 of the present invention.
Detailed Description
The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are presented herein only to illustrate and explain the present invention, and not to limit the present invention.
The embodiment of the utility model provides an artificial vertebral body implanted by vertical pressurization, the artificial vertebral body comprises a vertebral body 1, a bone grafting screw 2, a driving part 3 and a transition part 4, a holding cavity 101 is arranged in the vertebral body 1, a plurality of conical protrusions 111 are arranged on one end face of the vertebral body 1, a penetrating hole communicated with the holding cavity 101 is arranged on the other end face of the vertebral body 1, the transition part 4 and the bone grafting screw 2 are arranged in the holding cavity 101, the tip end of the bone grafting screw 2 faces the penetrating hole, the driving part 3 is provided with a control end 31 and a driving end 32, the driving end 32 penetrates through the side wall of the vertebral body 1 and is in transmission connection with the transition part 4, the upper end of the transition part 4 forms a driving part which is matched with the driving end 32 of the driving part 3, the lower end of the transition part 4 forms a slideway arranged along the length direction of the bone grafting screw 2, the nut end of bone grafting screw 2 with slide sliding connection, just be equipped with between bone grafting screw 2 and the transition part 4 by the elastic pressurization part 6 of vertical compression, driving part 3 passes through transition part 4 drives the coaxial rotation of bone grafting screw 2, elastic pressurization part 6 promotes bone grafting screw 2 and slides along vertical direction.
A bone grafting screw 2 is implanted into the vertebral body 1, a through hole is formed in the tip of the bone grafting screw 2, then a force perpendicular to the length direction of the vertebral body 1 is converted into a force perpendicular to the bone grafting screw 2 by a driving part 3, and the bone grafting screw 2 is pushed to rotate and move out from the interior of the vertebral body 1 along the vertical direction and is vertically nailed into the artificial vertebral body; artifical centrum adopts the mode of will planting bone screw 2 and squeezing into perpendicularly along human vertebra axis, does not increase other outstanding structures in the vertebra body, has avoided the foreign matter sense of prosthetic implantation and horizontal or slant to squeeze into the problem that bone screw 2 easily appears of planting bone screw 2 easily breaks and deviates from, simultaneously elasticity pressure boost part 6 provides the ascending pressure of vertical side for planting bone screw 2, for planting bone screw 2 provides the power of nailing perpendicularly, guarantees to plant bone screw 2 vertical rotation and nails into human backbone.
Example 1
To facilitate the disassembly and assembly of the medical device, the vertebral body 1 may be divided into a plurality of disassembly and assembly modules, as shown in figures 1 and 3, the vertebral body 1 comprises a vertebral body upper part 11 and a vertebral body lower part 12, a plurality of conical protrusions 111 are arranged on the upper end surface of the vertebral body upper part 11, the vertebral body lower part 12 is a hollow cylindrical part, the two sides of the connecting part extend upwards to form connecting parts 121 symmetrically, the upper part 11 of the vertebral body can be just embedded between the two connecting parts 121, the connecting parts 121 and the upper part 11 of the vertebral body are both provided with screw holes with the same diameter correspondingly, the lower vertebral body part 12 is fixedly connected with the upper vertebral body part 11 through the connecting part 121 and the screw hole on the upper vertebral body part 11 simultaneously by the screw 5, and combined to form an accommodating cavity 101 inside the vertebral body 1, the upper end of the cavity is arranged in a closed way, the lower end of the cavity is arranged in an open way to form a through hole, the diameter of the through hole is larger than the diameter of the stud of the bone grafting screw 2 and smaller than the diameter of the nut of the bone grafting screw 2.
The doctor applies force through the control end 31 of the driving part 3, and the driving end 32 transmits power to the bone grafting screw 2, and the power transmission mode between the driving part 3 and the bone grafting screw 2 can adopt a combined structure of various force transmissions in the prior art, such as the force transmission between a worm and a thread. However, in order to facilitate the transmission of force and the precision of control, the embodiment of the present invention provides the structure shown in fig. 2 and 3; the driving part 3 is provided with a control end 31 and a driving end 32, the control end 31 and the driving end 32 are coaxially and fixedly connected through a connecting rod, the control end 31 is arranged along the radial direction of the central shaft of the vertebral body 1 through the connecting rod, the diameter of the control end 31 is larger than that of the connecting rod, the end face of the control end 31 is embedded in the side wall of the vertebral body 1, the center of the end face is provided with a polygonal inner groove 301, and the polygonal inner groove 301 and the control end 31 are coaxially arranged. The polygonal recess is preferably hexagonal and the surgeon can use a hex screw to control the drive member 3.
The driving end 32 penetrates through the side wall of the vertebral body 1 and is in transmission connection with the transition part 4, namely the driving end 32 is matched with a driving part arranged at the upper end of the transition part 4 to drive the bone grafting screw 2 to rotate coaxially, as shown in fig. 2 and 3, the driving end 32 is a first helical gear coaxially and fixedly arranged with the connecting rod, the upper end 41 of the transition part 4 is a second helical gear meshed and connected with the first helical gear, the central axes of the first helical gear and the second helical gear are mutually perpendicular, the second helical gear, the bone grafting screw 2 and the vertebral body 1 are coaxially arranged, and the first helical gear and the second helical gear are mutually perpendicular and meshed and connected, so that the radial rotation of the driving part 3 is converted into axial rotation.
The lower end 42 of the transition part 4 forms a slideway arranged along the length direction of the bone grafting screw 2, and the nut end of the bone grafting screw 2 is connected with the slideway in a sliding way. As shown in fig. 2 and 3, the lower end 42 of the transition part 4 is a guiding cylinder, a plurality of longitudinal guiding grooves 421 are circumferentially distributed on the cylinder wall of the guiding cylinder, a plurality of radial protruding limiting parts 21 are circumferentially arranged on the nut of the bone grafting screw 2, the protruding limiting parts 21 are correspondingly embedded in the guiding grooves 421, and the bone grafting screw 2 is embedded in the guiding cylinder through the matching of the protruding limiting parts 21 and the guiding grooves 421.
Elasticity pressure boost parts 6 set up between the guide part of bone grafting screw 2 and transition part 4, specifically as shown in fig. 2 and fig. 3, the compression of elasticity pressure boost parts 6 sets up between the nut of bone grafting screw 2 and the bobbin base of guide cylinder, elasticity pressure boost parts 6 provides the ascending pressure of vertical side for bone grafting screw 2, for bone grafting screw 2 provides the power of nailing into perpendicularly, guarantees that bone grafting screw 2 vertical rotation nail goes into in the human backbone. Preferably, the elastic pressurizing member 6 is a spring.
When a doctor implants the artificial vertebral body into the spine of a patient, the conical protrusion 111 at the upper end of the artificial vertebral body is vertically upwards nailed into the upper spine of the patient, then the doctor clamps the hexagonal screw into the hexagonal groove of the driving part 3, the driving part 3 is rotated by the hexagonal screw, the first helical gear of the driving part 3 drives the second helical gear of the transition part 4, the radial rotation is converted into the axial rotation, the lower end of the transition part 4 drives the bone grafting screw 2 to axially rotate, the bone grafting screw 2 moves downwards along the longitudinal guide groove 421 under the action of gravity and screw thread, thereby the lower end of the vertebral body 1 is vertically downwards nailed into the lower spine of the patient through the penetrating hole, the artificial vertebral body is vertically nailed into the spine of the patient, the problem that the bone grafting screw 2 which is easy to break and deviate from when the bone grafting screw 2 is horizontally or obliquely nailed into the spine of the, and the bone grafting screw 2 is vertically driven along the central axis of the vertebra of the human body, other structures protruding out of the vertebra body are not added, and the foreign body sensation of prosthesis implantation is avoided.
It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit and scope of the invention, including other drive and transmission means, such as pneumatics, chains, etc. Thus, if such modifications and variations of the present invention fall within the scope of the claims and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (8)
1. An artificial vertebral body implanted by vertical pressurization is characterized in that the artificial vertebral body comprises a vertebral body, a bone grafting screw, a driving part and a transition part, an accommodating cavity is arranged in the vertebral body, a plurality of conical protrusions are arranged on one end face of the vertebral body, a penetrating hole communicated with the accommodating cavity is formed in the other end face of the vertebral body, the transition part and the bone grafting screw are arranged in the accommodating cavity, the tip end of the bone grafting screw faces the penetrating hole, the driving part is provided with a control end and a driving end, the driving end penetrates through the side wall of the vertebral body and is in transmission connection with the transition part, a driving part is formed at the upper end of the transition part and is matched with the driving end of the driving part, a slide way arranged along the length direction of the bone grafting screw is formed at the lower end of the transition part, and the nut end of the bone grafting screw is in sliding connection with the slide way, and an elastic pressurizing part which is vertically compressed is arranged between the bone grafting screw and the transition part, the driving part drives the bone grafting screw to coaxially rotate through the transition part, and the elastic pressurizing part pushes the bone grafting screw to slide along the vertical direction.
2. The artificial vertebral body for vertical pressurization implantation according to claim 1, wherein the control end of the driving member is disposed along the radial direction of the central axis of the vertebral body, the driving end is a first bevel gear coaxially and fixedly disposed with the control end, the upper end of the transition member is a second bevel gear engaged with the first bevel gear, the central axes of the first bevel gear and the second bevel gear are perpendicular to each other, and the second bevel gear is coaxially disposed with the bone grafting screw.
3. The artificial vertebral body for vertical pressurization implantation according to claim 1, wherein the lower end of the transition component is a guide portion, a vertical guide groove is formed on the guide portion, a radial protrusion limiting portion is formed on a nut of the bone grafting screw, and the protrusion limiting portion is correspondingly nested in the guide groove.
4. The artificial vertebral body implanted under the action of vertical pressurization according to claim 3, wherein a plurality of longitudinal guide grooves are circumferentially distributed on the guide part, a plurality of radial protruding limiting parts are circumferentially arranged on a nut of the bone grafting screw, and the protruding limiting parts are correspondingly nested in the guide grooves one by one.
5. The artificial vertebral body for vertical pressurization implantation according to claim 1, wherein a coaxial connecting rod is arranged between the control end and the driving end of the driving part, the diameter of the control end is larger than that of the connecting rod, and the end surface of the control end is embedded in the side wall of the vertebral body.
6. The artificial vertebral body for vertical pressurization implant of claim 5, wherein the end face of the control end of the driving part is centrally provided with a polygonal inner groove, and the polygonal inner groove is coaxially arranged with the control end.
7. The artificial vertebral body for vertical pressurization implantation according to claim 1, wherein the diameter of the penetration hole is larger than the stud diameter of the bone screw and smaller than the nut diameter of the bone screw.
8. The artificial vertebral body of claim 1 wherein the resilient biasing member is a spring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021502724.3U CN213098542U (en) | 2020-07-27 | 2020-07-27 | Artificial vertebral body implanted by vertical pressurization |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021502724.3U CN213098542U (en) | 2020-07-27 | 2020-07-27 | Artificial vertebral body implanted by vertical pressurization |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213098542U true CN213098542U (en) | 2021-05-04 |
Family
ID=75679997
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021502724.3U Active CN213098542U (en) | 2020-07-27 | 2020-07-27 | Artificial vertebral body implanted by vertical pressurization |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213098542U (en) |
-
2020
- 2020-07-27 CN CN202021502724.3U patent/CN213098542U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US11653962B2 (en) | Apparatus for immobilization and fusion of a synovial joint | |
| US10363144B2 (en) | Expandable spinal implant | |
| CN102470007B (en) | Expandable fixation assemblies | |
| US7901409B2 (en) | Intramedullar devices and methods to reduce and/or fix damaged bone | |
| US8808379B2 (en) | Spinal motion preservation devices and methods of use | |
| CN105073043A (en) | Devices and methods for bone anchoring | |
| US9675384B2 (en) | Spinal stabilization system | |
| JP2011515193A (en) | Foldable devices placed on the spine and methods related thereto | |
| CN103156679A (en) | Bone graft fixation systems | |
| CN202386760U (en) | Interbody fusion cage | |
| CN213098542U (en) | Artificial vertebral body implanted by vertical pressurization | |
| KR20230043926A (en) | Expandable Implant, Implant System, Kit of Parts for Assembly of Expandable Implant, and Method for Placing the Implant in Bone | |
| CN106308916B (en) | Artificial vertebral body fixed system | |
| CN101460107A (en) | Locking device for a bone stabilization system | |
| CN111839831A (en) | Vertically implanted artificial vertebral body | |
| CN107106212B (en) | Bone screw | |
| CN102488574A (en) | Interbody fusion cage | |
| KR20110005353A (en) | Implant fixture with bone cutting knife | |
| CN1436518A (en) | Interverterbral fusion implement | |
| CN107865715B (en) | Variable volume interbody fusion cage and implant device therefor | |
| WO2002045592A2 (en) | Implant retaining device | |
| CN210408682U (en) | Combined lumbar interbody fusion cage | |
| KR200496422Y1 (en) | Supporting member and supporting member assembly for implantation into or between subject’s bones, and template plug and tamper corresponding to the same | |
| CN111603280B (en) | Vertebral body prosthesis | |
| CN211934247U (en) | Support and assembly for implanting individual bone, guide template pushing member and tamping rod |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |