CN210130976U - Non-fusion cervical intervertebral disc prosthesis - Google Patents
Non-fusion cervical intervertebral disc prosthesis Download PDFInfo
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- CN210130976U CN210130976U CN201920518170.7U CN201920518170U CN210130976U CN 210130976 U CN210130976 U CN 210130976U CN 201920518170 U CN201920518170 U CN 201920518170U CN 210130976 U CN210130976 U CN 210130976U
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- end plate
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- disc prosthesis
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- cervical disc
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Abstract
The utility model relates to a non-fusion cervical disc prosthesis, including upper end plate, lower end plate, the lower end plate is the not confined casing of an upper end, be provided with spherical chamber in the casing, be provided with the ball-type nucleus pulposus of being made by metal rubber in the spherical chamber, the vertical cross guide rail of installing in casing inner bottom middle part, the pot head is established on the guide rail under the ball-type nucleus pulposus, the upper end plate is located lower end plate top, the upper end plate downside is provided with C type loop bar, C type loop bar cover is at ball-type nucleus pulposus surface, spherical intracavity portion left and right sides middle part is provided with the arc breach that steps down to C type loop bar both ends, this prosthesis simple structure, and reasonable design, the unable dual requirement of satisfying cervical vertebra biomechanics to elasticity and motion function simultaneously of prosthesis commonly used in having solved.
Description
Technical Field
The utility model relates to a non-fusion cervical intervertebral disc prosthesis, which belongs to the field of medical appliances.
Background
The artificial intervertebral disc prosthesis used clinically at present is mainly a combined prosthesis. The first is the combination of metal structure and metal structure, but the elastic modulus of metal material is far higher than that of cortical bone, which easily causes the artificial intervertebral disc and adjacent vertebral body to have too large stress, resulting in the prosthesis sinking, loosening or prolapsing, and the rigid connection between metal and metal can not play the role of vibration damping and buffering, thus losing the main function of vibration damping and buffering of lumbar intervertebral disc. But because of the fatigue resistance, high strength and good biocompatibility of metal materials, the metal materials are still used for manufacturing artificial joint materials. The second one is the combination of metal structure and polymer structure, because the polymer has the characteristic of low elastic modulus, the lumbar intervertebral disc prosthesis can be ensured to have good buffering and vibration damping effects, the biomechanical performance of the lumbar intervertebral disc can be better simulated, and the lumbar intervertebral disc prosthesis is widely used. However, the polymer has low strength and poor wear resistance, so that the service life of the prosthesis is limited, and particles generated by abrasion have certain toxicity and can trigger local or systemic reactions.
Disclosure of Invention
The utility model provides a non-fusion cervical intervertebral disc prosthesis.
The utility model provides a scheme that technical problem adopted is, a non-fusion cervical intervertebral disc prosthesis, including upper end plate, lower end plate, the lower end plate is the not confined casing of an upper end, is provided with spherical chamber in the casing, is provided with the ball-type nucleus pulposus of being made by metal rubber in the spherical intracavity, and the vertical cross guide rail of installing in casing inner bottom middle part, the end cover is established on the guide rail under the ball-type nucleus pulposus, and the upper end plate is located the lower end plate top, and the upper end plate downside is provided with C type loop bar, and C type loop bar cover is at ball-type nucleus pulposus surface, and spherical intracavity portion left and right sides middle part is provided with the arc breach that steps down.
Further, the casing includes left casing, right casing, and casing inner bottom middle part sets up the cross heavy groove that is used for holding cross guide rail lower tip, and both ends lower part is provided with the location jack about the cross heavy groove, and the convex part or the fixed pin that carry out the grafting with the location jack are installed to the cross guide rail lower extreme left and right sides.
Furthermore, the lower ends of the side where the left shell and the right shell are spliced with each other are correspondingly provided with a pin hole and a positioning pin respectively.
Furthermore, the pin hole and the positioning pin are symmetrically arranged in front and back.
Further, both ends longitudinal symmetry is provided with bolt hole A around the left casing, and both ends longitudinal symmetry is provided with bolt hole B around the right casing, and bolt hole A and bolt hole B one-to-one set up, and left casing, right casing concatenation back, through wearing bolt hole A and with this bolt hole A for bolt hole B's fixing bolt connection locking, fixing bolt end is through fixation nut locking.
Furthermore, the left side and the right side of the upper side surface of the upper end plate and the left side and the right side of the lower side surface of the lower end plate are both provided with inverted teeth along the transverse direction.
Furthermore, the inverted teeth are triangular prism-shaped.
Furthermore, metal rubber layers are arranged on the upper side face of the upper end plate and the lower side face of the lower end plate, and strip holes for yielding the inverted teeth are formed in the metal rubber layers.
Furthermore, the outer surface of the metal rubber layer is sprayed with bioactive materials or osteoinductive materials.
Compared with the prior art, the utility model discloses following beneficial effect has: simple structure, reasonable in design has solved the unable dual requirement of satisfying cervical vertebra biomechanics to elasticity and motion function simultaneously of false body commonly used among the current artifical cervical intervertebral disc replacement technique, adopts the metal rubber material as false body nucleus pulposus, when keeping the wear-resisting corrosion-resistant characteristic of metal, has good antifatigue strength in addition, maintains the support rigidity of false body to a certain extent, has higher stability.
Drawings
The following describes the present invention with reference to the accompanying drawings.
FIG. 1 is a schematic view of the structure of a prosthesis;
FIG. 2 is a structural cross-sectional view of the prosthesis;
FIG. 3 is an exploded view of the structure of the prosthesis;
FIG. 4 is a schematic view of the upper endplate;
FIG. 5 is a schematic view of the left housing structure of the inferior endplate;
FIG. 6 is a schematic view of the right housing of the inferior endplate;
FIG. 7 is a schematic view of a spherical nucleus pulposus;
fig. 8 is a schematic structural view of a cross-shaped guide rail.
In the figure:
1-upper end plate; 2-lower end plate; 201-left shell; 202-right housing; 3-a metal rubber layer; 4-chamfering; 5-spherical cavity; 6-arc notch; 7-C type loop bar; 8-spherical nucleus pulposus; 9-cross guide rail; 10-fixing the bolt; 11-a fixing nut; 12-bolt hole A; 13-bolt hole B; 14-screw holes; 15-the left half of the cross-shaped sinking groove; 16-a positioning jack; 17-right half of the cross-shaped sink; 18-a locating pin; 19-pin holes; 20-a cross-shaped chute; 21-convex part.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and the following detailed description.
As shown in figures 1-8, a non-fusion cervical intervertebral disc prosthesis comprises an upper end plate and a lower end plate which are made of cobalt-chromium-molybdenum alloy materials, wherein the lower end plate is a shell with an unsealed upper end, a spherical cavity is arranged in the shell, a spherical nucleus pulposus made of metal rubber is arranged in the spherical cavity, the spherical nucleus pulposus is wrapped in the spherical cavity to prevent the spherical nucleus pulposus from falling off, a cross-shaped guide rail is vertically arranged in the middle of an inner bottom of the shell, the lower end of the spherical nucleus pulpis sleeved on the guide rail, the lower end surface of the spherical nucleus pulpis a horizontal plane, the diameter of the horizontal plane is smaller than that of the spherical nucleus pulpis, a cross-shaped sliding groove is vertically arranged in the middle of the lower end of the spherical nucleus pulpis matched with the cross-shaped guide rail through the cross-shaped sliding groove, gaps of 1mm are, the C-shaped sleeve rod is sleeved on the outer surface of the spherical nucleus pulposus, the middle parts of the left side and the right side in the spherical cavity are provided with arc notches for abdicating two ends of the C-shaped sleeve rod, the end parts of the C-shaped sleeve rod are wrapped by the arc notches to prevent the C-shaped sleeve rod from being disengaged, the upper end plate forms a spherical socket joint with the upper surface of the spherical nucleus pulposus through the C-shaped sleeve rod to realize multi-working-condition motion of the prosthesis, and when the C-shaped sleeve rod of the upper end plate freely moves relative to the spherical nucleus pulposus under six working conditions of left rotation, right rotation, forward bending, backward stretching, left bending and right bending, the spherical nucleus pulposus parallelly moves along the sagittal diameter and transverse diameter directions of the lower end plate to form a semi.
In this embodiment, the arc-shaped notch can limit the rotation angle of the ball-and-socket joint, limit the rotation mobility of the prosthesis within the design range, and simultaneously limit the mobility of the anterior flexion and the posterior extension, but limit the mobility of the left lateral bending and the right lateral bending of the prosthesis, and the mobility of the lateral bending of the cervical vertebra can realize the lateral bending with a small radian through the spherical nucleus pulposus.
In this embodiment, the spherical nucleus pulposus is made of elastic porous material metal rubber, which is a novel homogeneous elastic porous material, and is made by sequentially arranging metal wires with certain mass, stretching and spiral shape in a punching or rolling die through a special process and performing a punch forming method. The metal wire can be medical titanium alloy metal wire, the elastic modulus of the metal wire is close to that of the intervertebral disc, the metal wire has good biocompatibility, and when the spherical nucleus pulposus is loaded, the metal wire can play a role in damping and buffering. The rubber-like material has elasticity and damping performance while maintaining the good fatigue strength and corrosion resistance of metal. And the rigidity of the spherical nucleus pulposus can well ensure that the intervertebral disc prosthesis well maintains the height of the vertebral body. Meanwhile, the metal rubber material has the characteristics of metal, the wear resistance, the fatigue life and the rigidity are excellent, and the service life of the prosthesis can be ensured for a long time.
In this embodiment, the casing includes left casing, right casing, and casing inner bottom middle part sets up the cross heavy groove that is used for holding cross guide rail lower tip, and both ends lower part is provided with the location jack about the cross heavy groove, and the convex part or the fixed pin that carry out the grafting with the location jack are installed to cross guide rail lower extreme left and right sides.
In this embodiment, the lower ends of the sides where the left and right housings are spliced with each other are respectively and correspondingly provided with a pin hole and a positioning pin.
In this embodiment, pinhole, locating pin all front and back symmetry set up two.
In this embodiment, both ends longitudinal symmetry is provided with bolt hole A around the left casing, and both ends longitudinal symmetry is provided with bolt hole B around the right casing, and bolt hole A and bolt hole B one-to-one set up, and left casing, right casing concatenation back, through wearing to establish bolt hole A and with the bolt hole B's of bolt hole A for the fixing bolt connection locking, the fixing bolt end is locked through fixation nut.
In this embodiment, the left and right sides of the upper end plate upper side and the left and right sides of the lower end plate lower side are both provided with inverted teeth along the transverse direction, and the inverted teeth are used for being connected with vertebral body vertebrae.
In the present embodiment, the inverted teeth are triangular prism-shaped.
In this embodiment, porous metal rubber layers are respectively installed on the upper side surface of the upper end plate and the lower side surface of the lower end plate, a strip hole for abdicating the inverted tooth is formed in each metal rubber layer, a plurality of screw holes are respectively formed in the upper side surface of the upper end plate and the lower side surface of the lower end plate, and the metal rubber layers are locked with the upper surface of the upper end plate and the lower surface of the lower end plate through screws in threaded fit with the screw holes.
In the embodiment, the outer surface of the metal rubber layer is sprayed with a bioactive material or an osteoinductive material, so that the growth of bones is induced conveniently, the prosthesis is connected with the upper vertebral body and the lower vertebral body more tightly, the growth and attachment of bone tissues in the future are facilitated, and the prosthesis is prevented from falling off.
The above-mentioned preferred embodiments, further detailed description of the objects, technical solutions and advantages of the present invention, it should be understood that the above-mentioned are only preferred embodiments of the present invention, and should not be construed as limiting the present invention, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included within the scope of the present invention.
Claims (9)
1. A non-fusion cervical disc prosthesis, comprising: including upper end plate, lower end plate, the lower end plate is a not closed casing in upper end, is provided with spherical chamber in the casing, is provided with the spherical nucleus pulposus of being made by metal rubber in the spherical chamber, and the vertical cross guide rail of installing in casing inner bottom middle part, the lower pot head of spherical nucleus pulposus establish on the guide rail, and the upper end plate is located the lower end plate top, and the upper end plate downside is provided with C type loop bar, and C type loop bar cover is at spherical nucleus pulposus surface, and the inside left and right sides middle part in spherical chamber is provided with the arc breach that steps down C type loop bar both ends.
2. The non-fused cervical disc prosthesis as recited in claim 1, wherein: the casing includes left casing, right casing, and casing inner bottom middle part sets up the cross heavy groove that is used for holding cross guide rail lower tip, and both ends lower part is provided with the location jack about the cross heavy groove, and the convex part or the fixed pin that carry out the grafting with the location jack are installed to the cross guide rail lower extreme left and right sides.
3. The non-fused cervical disc prosthesis as recited in claim 1, wherein: the lower ends of the side where the left shell and the right shell are spliced with each other are correspondingly provided with a pin hole and a positioning pin respectively.
4. The non-fused cervical disc prosthesis as recited in claim 3, wherein: the pin hole and the positioning pin are symmetrically arranged in front and back.
5. The non-fusion cervical disc prosthesis of claim 2 or 3, wherein: both ends longitudinal symmetry is provided with bolt hole A around the left casing, and both ends longitudinal symmetry is provided with bolt hole B around the right casing, and bolt hole A and bolt hole B one-to-one set up, and left casing, right casing concatenation back, through wearing to establish bolt hole A and with this bolt hole A for bolt hole B's fixing bolt connect the locking, fixing bolt end is through fixation nut locking.
6. The non-fused cervical disc prosthesis as recited in claim 1, wherein: the left side and the right side of the upper side surface of the upper end plate and the left side and the right side of the lower side surface of the lower end plate are both provided with inverted teeth along the transverse direction.
7. The non-fused cervical disc prosthesis as recited in claim 6, wherein: the inverted teeth are triangular prism shaped.
8. The non-fused cervical disc prosthesis as recited in claim 1, wherein: the upper side face of the upper end plate and the lower side face of the lower end plate are both provided with metal rubber layers, and the metal rubber layers are provided with strip holes for yielding the inverted teeth.
9. The non-fused cervical disc prosthesis as recited in claim 8, wherein: the outer surface of the metal rubber layer is sprayed with bioactive materials or osteoinductive materials.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920518170.7U CN210130976U (en) | 2019-04-17 | 2019-04-17 | Non-fusion cervical intervertebral disc prosthesis |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920518170.7U CN210130976U (en) | 2019-04-17 | 2019-04-17 | Non-fusion cervical intervertebral disc prosthesis |
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| CN210130976U true CN210130976U (en) | 2020-03-10 |
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| CN201920518170.7U Active CN210130976U (en) | 2019-04-17 | 2019-04-17 | Non-fusion cervical intervertebral disc prosthesis |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110025408A (en) * | 2019-04-17 | 2019-07-19 | 福州大学 | Non-fused cervical intervertebral disk prosthesis and its assembly method |
| CN117084832A (en) * | 2023-10-16 | 2023-11-21 | 北京爱康宜诚医疗器材有限公司 | Spinal facet joint prosthesis |
-
2019
- 2019-04-17 CN CN201920518170.7U patent/CN210130976U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110025408A (en) * | 2019-04-17 | 2019-07-19 | 福州大学 | Non-fused cervical intervertebral disk prosthesis and its assembly method |
| CN117084832A (en) * | 2023-10-16 | 2023-11-21 | 北京爱康宜诚医疗器材有限公司 | Spinal facet joint prosthesis |
| CN117084832B (en) * | 2023-10-16 | 2023-12-26 | 北京爱康宜诚医疗器材有限公司 | Spinal facet joint prosthesis |
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