CN102727329B - Artificial cervical intervertebral disc - Google Patents
Artificial cervical intervertebral disc Download PDFInfo
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- CN102727329B CN102727329B CN201210217748.8A CN201210217748A CN102727329B CN 102727329 B CN102727329 B CN 102727329B CN 201210217748 A CN201210217748 A CN 201210217748A CN 102727329 B CN102727329 B CN 102727329B
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- 238000005452 bending Methods 0.000 claims description 7
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 5
- 230000009471 action Effects 0.000 claims description 5
- 210000000988 bone and bone Anatomy 0.000 claims description 5
- 230000009977 dual effect Effects 0.000 claims description 5
- 230000005484 gravity Effects 0.000 claims description 5
- 229910052588 hydroxylapatite Inorganic materials 0.000 claims description 5
- XYJRXVWERLGGKC-UHFFFAOYSA-D pentacalcium;hydroxide;triphosphate Chemical compound [OH-].[Ca+2].[Ca+2].[Ca+2].[Ca+2].[Ca+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O XYJRXVWERLGGKC-UHFFFAOYSA-D 0.000 claims description 5
- 230000035479 physiological effects, processes and functions Effects 0.000 claims description 5
- 238000004088 simulation Methods 0.000 claims description 5
- 238000005507 spraying Methods 0.000 claims description 5
- 229910052719 titanium Inorganic materials 0.000 claims description 5
- 239000010936 titanium Substances 0.000 claims description 5
- 230000006978 adaptation Effects 0.000 claims description 3
- 230000006870 function Effects 0.000 abstract description 8
- 238000000034 method Methods 0.000 abstract description 3
- 230000008569 process Effects 0.000 abstract description 3
- 230000007659 motor function Effects 0.000 abstract description 2
- 238000010276 construction Methods 0.000 abstract 1
- 230000035790 physiological processes and functions Effects 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 3
- 230000008676 import Effects 0.000 description 2
- 208000003618 Intervertebral Disc Displacement Diseases 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000006837 decompression Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000007943 implant Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 231100000915 pathological change Toxicity 0.000 description 1
- 230000036285 pathological change Effects 0.000 description 1
- 230000001766 physiological effect Effects 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2/44—Joints for the spine, e.g. vertebrae, spinal discs
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
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- Health & Medical Sciences (AREA)
- Orthopedic Medicine & Surgery (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Cardiology (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Transplantation (AREA)
- Neurology (AREA)
- Vascular Medicine (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Prostheses (AREA)
Abstract
The invention relates to an artificial cervical intervertebral disc, which comprises an upper bottom plate, a lower bottom plate and a nucleus pulposus arranged between the upper bottom plate and the lower bottom plate, wherein the nucleus pulposus consists of an upper nucleus pulposus and a lower nucleus pulposus; the upper nucleus pulposus is provided with a convex cylinder; the lower nucleus pulposus is used for allowing an arc-shaped dovetail groove to be nested with the convex cylinder; the upper nucleus pulposus and the lower nucleus pulposus are mutually buckled; the upper bottom plate and the upper nucleus pulposus are cooperated and rotate around a coronal axis so as to simulate the fore flexion and back extension function of the cervical intervertebral disc; the upper bottom plate and the upper nucleus pulposus are permitted to generate front and back relative micro translation; the upper nucleus pulposus and the lower nucleus pulposus are cooperated, can rotate around the rotation axis of the self convex cylinder of the upper nucleus pulposus and also can perform revolution around the rotary track of the arc-shaped dovetail groove of the lower nucleus pulposus; the lower nucleus pulposus and the lower bottom plate are cooperated, and rotate around a sagittal axis to bear motor functions of left and right lateral curvature; and the lower bottom plate and the lower nucleus pulposus are permitted to generate left and right relative micro translation. According to the cervical intervertebral disc prosthesis disclosed by the invention, different construction members of the cervical intervertebral disc prosthesis are permitted to mutually move, and a rotation center in the moving process is coincident with the rotation center of cervical spine segmental physiological movement, so that the natural physiological state of the cervical vertebra can be furthest restored.
Description
Technical field
The present invention relates to a kind of prosthese of implant into body, particularly a kind of for replacing in cervical vertebra the intervertebral disc that pathological changes occurs, with to cervical vertebral space decompression, maintain cervical vertebral space height and recover the cervical artificial disc of its normal physiological activity function.
Background technology
CN 201010003132.1 discloses " a kind of artificial cervical intervertebral disc ", it is simple that its object is to provide a kind of structure, adopt Trinitarian structure, make this prosthese have rotation, bend and stretch, translation three-dimensional six-freedom degree space operation scope, meet the cervical vertebra motor function of human normal, solve in-problem artificial cervical intervertebral disc in prior art.This technical scheme comprises: upper soleplate, lower soleplate and the anti abrasive vertebral pulp be located between soleplate and lower soleplate, described vertebral pulp comprises circular intermediate, be located at the soleplate stopper upper and lower with the annular of intermediate concentric in the middle part of intermediate circumferential side wall radial direction, be located at the built-in ball-and-socket joint of intermediate inside, be provided with in the upper and lower two vertebral pulp all-moving surface centers of intermediate the stop head import communicated with built-in ball-and-socket joint; The medial surface of upper soleplate is provided with arcuate groove in circle, is provided with upper pillar stand in the center of upper arcuate groove, the outer end of upper pillar stand is provided with stop head; The medial surface of lower soleplate is provided with circular arc lower groove, is provided with lower pillar stand in the center of arc lower groove, the outer end of lower pillar stand is provided with lower stop head; The stop head import activity that upper stop head and lower stop head are each passed through on upper and lower two vertebral pulp all-moving surface centers snaps in built-in ball-and-socket joint; The lateral surface of upper soleplate and lower soleplate is respectively equipped with several anti-dislocation fixed teeth.Its weak point is: the position that cervical intervertebral disk produces its vertebral pulp in the process of relative motion at cervical vertebral segment is variable, and namely it can provide instantaneous variable center of rotation.But the center of rotation of above-mentioned prosthese is but fixing, thus do not meet human body makes vertebral pulp position changeable requirement as live body face.
Summary of the invention
The object of this invention is to provide a kind of prosthese allows its different component to move each other, and the center of rotation in motor process is consistent with the center of rotation of cervical vertebral segment physiological movement, to recover the cervical intervertebral disk prosthesis of the natural physiological status of cervical vertebra to greatest extent.
Technical solution of the present invention is described cervical artificial disc, the vertebral pulp comprising upper plate, lower shoe and be located between upper plate and lower shoe, its special character is: the lower vertebral pulp of the arc dovetail groove that described vertebral pulp is nested with supplying described projection by the upper vertebral pulp of the band projection mutually snapped together is formed; Described upper plate coordinates with described upper vertebral pulp, rotates around frontal axis, the anterior flexion and rear stretching function of simulation cervical intervertebral disk, and allows relative micro-translation of upper plate and upper vertebral pulp generation fore-and-aft direction; Described upper vertebral pulp coordinates with described lower vertebral pulp, both can rotate around the rotating shaft of self projection of upper vertebral pulp, can revolve round the sun around the rotational trajectory of the arc dovetail groove of described lower vertebral pulp again, instantaneous variable vertical axis revolving axle is consistent with the physiological status of cervical intervertebral disk, restriction prosthese is deviate from from vertical axial; Described lower vertebral pulp coordinates with described lower shoe, rotates around sagittal axis, bears the motion function of left and right lateral bending, and allows lower shoe and lower vertebral pulp that relative micro-translation in left and right direction occurs; The initial top rake of the cervical artificial disc be consistent with the physiological feature of cervical intervertebral disk 5 °; Described upper plate, described lower shoe can coordinate with the upper vertebral pulp of differing heights series, lower vertebral pulp, with the anatomical features of satisfied different ethnic group cervical intervertebral disk.
As preferably: described upper vertebral pulp is parallel with frontal axis and be positioned at the upper arc convex of the next vertebral body by rotating shaft, lower plane, upwards arcwall face longitudinal edge is vertically recessed respectively coordinates the arc shaped wing short slot deviate from from vertical axial to limit prosthese with the arc track of the arcuate groove adaptation of upper plate from lower plane for dual side-edge, lower plane is positioned at central part projection and overlaps with the physiology center of rotation of cervical intervertebral disk and coordinate the projection deviate from from vertical axial to limit prosthese to form with lower vertebral pulp arc dovetail groove, the arc shaped wing short slot that the forward and backward two ends of described upper vertebral pulp are arranged coordinates to deviate from from vertical axial to limit prosthese with the arc track at the described forward and backward two ends of upper plate arcuate groove.
As preferably: on described upper vertebral pulp, the radius of arc convex is equal to or slightly less than the radius of upper plate arcuate groove.
As preferably: described lower vertebral pulp by upper plane, rotating shaft is parallel with sagittal axis and be positioned at the arc lower face of upper vertebral body, arc dovetail groove that the radially recessed center of rotation in upper plane central position is positioned at spinal column rear pillar, biend form from the recessed short slot forming arc shaped wing of the downward arcwall face of upper plane respectively.
As preferably: the radius in described lower vertebral pulp arc lower face is equal to or slightly less than the radius of lower shoe arc groove.
As preferably: described upper plate by plate body, the recessed rotating shaft of plate body lower surface parallel with frontal axis and be positioned at the arcuate groove of the next vertebral body, the left and right two ends of arcuate groove respectively the recessed left and right two ends keeping supplying vertebral pulp arrange short slot with arc shaped wing coordinate and form with the arcuate serrated face set by the rear end of the arcuate serrated face set by the front end limiting arc track that prosthese deviates from from vertical axial, plate body upper surface, plate body upper surface, plane in the middle of upper plate upper surface.
As preferably: the serrated face sawtooth direction in arcuate serrated face, described front end backwards, and the serrated face sawtooth direction of described rear end arc serrated face forward, coordinate with the lower surface of the upper vertebral body of cervical vertebra, under the action of gravity of incidence, the upper surface serrated face of upper plate and the lower surface of upper vertebral body form self-locking, location.
As preferably: the surface spraying of described plane urgees that bone is grown into, fixing titanium valve and hydroxyapatite.
As preferably: described lower shoe by plate body, the recessed rotating shaft of plate body upper surface parallel with sagittal axis and be positioned at the arc groove of upper vertebral body, projection vertically and the forward and backward two ends of lower vertebral pulp arrange arc shaped wing that short slot forms and coordinate and form with the pawl limiting buckle that prosthese deviates from from vertical axial, the projection of plate body lower surface some the two ends horizontal edge radially of longitudinal edge vertically recessed arc track, arc groove respectively of arc groove respectively.
Another technical solution of the present invention is described cervical artificial disc, the vertebral pulp comprising upper plate, lower shoe and be located between upper plate and lower shoe, its special character is: the lower vertebral pulp of the arc dovetail groove that described vertebral pulp is nested with supplying described projection by the upper vertebral pulp of the band projection mutually snapped together is formed; Described upper plate coordinates with described upper vertebral pulp, rotates around frontal axis, the anterior flexion and rear stretching function of simulation cervical intervertebral disk, and allows relative micro-translation of upper plate and upper vertebral pulp generation fore-and-aft direction; Described upper vertebral pulp coordinates with described lower vertebral pulp, both can rotate around the rotating shaft of self projection of upper vertebral pulp, can revolve round the sun around the rotational trajectory of the arc dovetail groove of described lower vertebral pulp again, instantaneous variable vertical axis revolving axle is consistent with the physiological status of cervical intervertebral disk, restriction prosthese is deviate from from vertical axial; Described lower vertebral pulp coordinates with described lower shoe, rotates around sagittal axis, bears the motion function of left and right lateral bending; The initial top rake of the cervical artificial disc be consistent with the physiological feature of cervical intervertebral disk 5 °; Described upper plate, described lower shoe can coordinate with the upper vertebral pulp of differing heights series, lower vertebral pulp, with the anatomical features of satisfied different ethnic group cervical intervertebral disk; Described upper vertebral pulp by rotating shaft parallel with frontal axis and be positioned at the upper arc convex of the next vertebral body, platform that lower plane is formed forms, from lower plane, upwards the recessed short slot with arc shaped wing of arcwall face, lower plane are positioned at the round platform that central part projection overlaps with the physiology center of rotation of cervical intervertebral disk and form dual side-edge; The arc shaped wing short slot that the forward and backward two ends of described upper vertebral pulp are arranged coordinates with the arc track at the described forward and backward two ends of upper plate concave groove, and restriction prosthese is deviate from from vertical axial; The radius of the upper arc convex of described upper vertebral pulp platform is equal to or slightly less than the radius of upper plate arcuate groove; Described lower vertebral pulp by upper plane, rotating shaft is parallel with sagittal axis and be positioned at the arc lower face of upper vertebral body, arc dovetail groove that the radially recessed center of rotation in upper plane central position is positioned at spinal column rear pillar, biend form from the recessed short slot forming arc shaped wing of the downward arcwall face of upper plane respectively; The radius in described lower vertebral pulp arc lower face is equal to or slightly less than the radius of lower shoe arc groove; By plate body, the recessed rotating shaft of plate body lower surface, and the plane that be positioned at the arcuate groove of the next vertebral body, the arcuate serrated face forward and backward two ends set by of plate body upper surface, upper plate upper surface in the middle of parallel with frontal axis forms described upper plate; The serrated face sawtooth direction in arcuate serrated face, described front end backwards, and the serrated face sawtooth direction of described rear end arc serrated face forward, coordinate with the lower surface of the upper vertebral body of cervical vertebra, under the action of gravity of incidence, the upper surface serrated face of upper plate and the lower surface of upper vertebral body form self-locking, location; The surface spraying of described plane urgees that bone is grown into, fixing titanium valve and hydroxyapatite; Described lower shoe by plate body, the recessed rotating shaft of plate body upper surface parallel with sagittal axis and be positioned at the arc groove of upper vertebral body, projection vertically and the forward and backward two ends of lower vertebral pulp arrange arc shaped wing that short slot forms and coordinate and form with the pawl limiting buckle that prosthese deviates from from vertical axial, the projection of plate body lower surface some the two ends horizontal edge radially of longitudinal edge vertically recessed arc track, arc groove respectively of arc groove respectively.
Compared with prior art, advantage of the present invention:
1, temporary fixed mode adopts: the contact surface of upper plate and upper vertebral body lower surface establishes arcuate serrated face, the contact surface of lower shoe and the next vertebral body upper surface establishes some pawls, while reaching stable fixing, reduce the damage to vertebral body to greatest extent, prevent the long term of cervical intervertebral disk prosthesis from sinking, binodal the section even requirement of multi-segmental cervical intervertebral disk displacement can be competent at.
2, three orthogonal rotary freedoms of rotating shaft are provided, and bend and stretch at cervical vertebra, lateral bending, rotation state under the instantaneous centre of rotation meeting nature physiological status can be provided, and three articular surfaces all allow trickle translation, recover the natural physiological status of human cervical spine to greatest extent.
Accompanying drawing explanation
Fig. 1 is the STRUCTURE DECOMPOSITION schematic diagram of cervical artificial disc of the present invention.
Fig. 2 is the Standard schematic diagram of cervical artificial disc of the present invention.
Fig. 3 is the structural profile view of cervical artificial disc of the present invention.
Fig. 4 is the structural representation of upper plate of the present invention.
Fig. 5 is the side view of Fig. 4.
Fig. 6 is the sectional view of Fig. 4.
Fig. 7 is the structural representation of lower shoe of the present invention.
Fig. 8 is the side view of Fig. 7.
Fig. 9 is the sectional view of Fig. 7.
Figure 10 is the structural representation of vertebral pulp in the present invention.
Figure 11 is the side view of Figure 10.
Figure 12 is the sectional view of Figure 10.
Figure 13 is the structural representation of vertebral pulp under the present invention.
Figure 14 is the side view of Figure 13.
Figure 15 is the sectional view of Figure 13.
Figure 16 is the schematic diagram of human body coordinate axes.
Primary clustering symbol description:
Upper plate 1, plate body 11, arcuate groove 12, arc track 121, arcuate serrated face, front end 13, rear end arc serrated face 14, plane 15, lower shoe 2, plate body 21, arc groove 22, L shape arc track 23, buckle 221, pawl 24, vertebral pulp 3, upper vertebral pulp 31, projection 311, upper arc convex 312, lower plane 313, arc shaped wing short slot 314, lower vertebral pulp 32, upper plane 321, arc dovetail groove 3211, arc lower face 322, short slot 323, arc shaped wing 3231.
Detailed description of the invention
The present invention is further detailed in conjunction with the accompanying drawings below:
Refer to shown in Fig. 1, Fig. 2, Fig. 3, Figure 16, described cervical artificial disc, the vertebral pulp 3 comprising upper plate 1, lower shoe 2 and be located between upper plate 1 and lower shoe 2, the lower vertebral pulp 32 of the arc dovetail groove 3211 that described vertebral pulp is nested with supplying described projection 311 by the upper vertebral pulp 31 of the band projection 311 mutually snapped together is formed; Described upper plate 1 coordinates with described upper vertebral pulp 31, rotates around frontal axis, the anterior flexion and rear stretching function of simulation cervical intervertebral disk, and allows upper plate 1, with upper vertebral pulp 31, relative micro-translation of fore-and-aft direction occurs; Described upper vertebral pulp 31 coordinates with described lower vertebral pulp 31, both can rotate around the rotating shaft of self projection 311 of upper vertebral pulp 31, can revolve round the sun around the rotational trajectory of the arc dovetail groove 3211 of described lower vertebral pulp 32 again, instantaneous variable vertical axis revolving axle is consistent with the physiological status of cervical intervertebral disk, and restriction prosthese is deviate from from vertical axial; Described lower vertebral pulp 32 coordinates with described lower shoe 2, rotates around sagittal axis, bears the motion function of left and right lateral bending, and allows lower shoe 2 and lower vertebral pulp 32 that relative micro-translation in left and right direction occurs; The initial top rake of the cervical artificial disc be consistent with the physiological feature of cervical intervertebral disk 5 °; Described upper plate 1, described lower shoe 2 can coordinate with the upper vertebral pulp 31 of differing heights series, lower vertebral pulp 32, with the anatomical features of satisfied different ethnic group cervical intervertebral disk.
Refer to shown in Fig. 4, Fig. 5, Fig. 6, Figure 16, described upper plate 1 by plate body 11, the recessed rotating shaft of plate body lower surface parallel with frontal axis and be positioned at the arcuate groove 12 of the next vertebral body (not shown), the left and right two ends of arcuate groove 12 respectively the recessed left and right two ends keeping supplying vertebral pulp 31 arrange short slot 314 with arc shaped wing coordinate and form with the arcuate serrated face 14 set by the rear end of the arcuate serrated face 13 set by the front end limiting arc track 121 that prosthese deviates from from vertical axial, plate body 11 upper surface, plate body 11 upper surface, plane 15 in the middle of upper plate 11 upper surface.The serrated face sawtooth direction in arcuate serrated face, described front end 13 backwards, and the serrated face sawtooth direction of described rear end arc serrated face 14 forward, coordinate with the lower surface of the upper vertebral body (not shown) of cervical vertebra, under the action of gravity of incidence, the upper surface serrated face of upper plate 1 and the lower surface of upper vertebral body (not shown) form self-locking, location.The surface spraying of described plane 15 urgees that bone is grown into, fixing titanium valve and hydroxyapatite.
Refer to shown in Fig. 7, Fig. 8, Fig. 9, Figure 16, described lower shoe 2 by plate body 21, the recessed rotating shaft of plate body upper surface parallel with sagittal axis and be positioned at the arc groove 22 of upper vertebral body (not shown), projection vertically and the forward and backward two ends of lower vertebral pulp 32 arrange arc shaped wing that short slot forms and coordinate and form with the pawl 24 limiting buckle 221 that prosthese deviates from from vertical axial, the projection of plate body 21 lower surface some the two ends horizontal edge radially of longitudinal edge vertically recessed arc track 23, arc groove 22 respectively of arc groove 22 respectively.
Refer to Figure 10, Figure 11, Figure 12, shown in Figure 16, described upper vertebral pulp 31 is parallel with frontal axis and be positioned at the upper arc convex 312 of the next vertebral body (not shown) by rotating shaft, lower plane 313, dual side-edge is from the lower plane 313 upwards arcwall face 312 longitudinal edge vertically recessed arc shaped wing short slot 314 coordinating to limit prosthese with the arc track 121 of arcuate groove 12 adaptation of upper plate 1 and deviate from from vertical axial respectively, lower plane 313 is positioned at central part projection and overlaps with the physiology center of rotation of cervical intervertebral disk and coordinate to limit the projection 311 that prosthese deviates from from vertical axial with lower vertebral pulp 32 arc dovetail groove 3211 and form, the arc shaped wing short slot 314 of the forward and backward two ends setting of described upper vertebral pulp 31 coordinates to limit prosthese with the arc track 121 at the described forward and backward two ends of upper plate arcuate groove 12 and deviates from from vertical axial.On described upper vertebral pulp 31, the radius of arc convex 312 is equal to or slightly less than the radius of upper plate arcuate groove 12.
Refer to shown in Figure 13, Figure 14, Figure 15, Figure 16, described lower vertebral pulp 32 by upper plane 321, rotating shaft parallel with sagittal axis and be positioned at the arc lower face 322 of upper vertebral body (not shown), arc dovetail groove 3211 that the radially recessed center of rotation of upper plane 321 central part is positioned at spinal column rear pillar (not shown), biend respectively from upper plane 321 downwards the recessed short slot 323 forming arc shaped wing 3231 of arcwall face 322 form.The radius in described lower vertebral pulp arc lower face 322 is equal to or slightly less than the radius of lower shoe arc groove 22.The projection 311 of upper vertebral pulp 31 lower surface coordinates with the arc dovetail groove 3211 of lower vertebral pulp 32 upper surface, and restriction prosthese is deviate from from vertical axial.
Operation principle: the present invention adopts above-mentioned four components, i.e. upper plate 1, upper vertebral pulp 31, lower vertebral pulp 32, lower shoe 2, linked by three articular surfaces and become a metastable cervical intervertebral disk prosthesis, wherein the rotating shaft of articular surface that formed with upper vertebral pulp 31 of upper plate 1 is parallel with frontal axis and be positioned at the next vertebral body, the rotating shaft of the articular surface that upper vertebral pulp 31 and lower vertebral pulp 32 are formed and vertical axis and be positioned at spinal column rear pillar, the rotating shaft of the articular surface that lower shoe 2 is formed with lower vertebral pulp 32 is parallel with sagittal axis and be positioned at upper vertebral body, this cervical artificial disc is bent and stretched at cervical vertebra, lateral bending, the instantaneous centre of rotation meeting nature physiological status can be provided under rotation status, recover the natural physiological status of human cervical spine to greatest extent.
The foregoing is only preferred embodiment of the present invention, all equalizations done according to the claims in the present invention scope change and modify, and all should belong to the covering scope of the claims in the present invention.
Claims (10)
1. a cervical artificial disc, the vertebral pulp comprising upper plate, lower shoe and be located between upper plate and lower shoe, is characterized in that: the lower vertebral pulp of the arc dovetail groove that described vertebral pulp is nested with supplying described projection by the upper vertebral pulp of the band projection mutually snapped together is formed; Described upper plate coordinates with described upper vertebral pulp, rotates around frontal axis, the anterior flexion and rear stretching function of simulation cervical intervertebral disk, and allows relative micro-translation of upper plate and upper vertebral pulp generation fore-and-aft direction; Described upper vertebral pulp coordinates with described lower vertebral pulp, both can rotate around the rotating shaft of self projection of upper vertebral pulp, can revolve round the sun around the rotational trajectory of the arc dovetail groove of described lower vertebral pulp again, instantaneous variable vertical axis revolving axle is consistent with the physiological status of cervical intervertebral disk, restriction prosthese is deviate from from vertical axial; Described lower vertebral pulp coordinates with described lower shoe, rotates around sagittal axis, bears the motion function of left and right lateral bending, and allows lower shoe and lower vertebral pulp that relative micro-translation in left and right direction occurs; The initial top rake of the cervical artificial disc be consistent with the physiological feature of cervical intervertebral disk 5 °; Described upper plate, described lower shoe can coordinate with the upper vertebral pulp of differing heights series, lower vertebral pulp, with the anatomical features of satisfied different ethnic group cervical intervertebral disk.
2. cervical artificial disc according to claim 1, is characterized in that: described upper vertebral pulp by rotating shaft parallel with frontal axis and be positioned at the upper arc convex of the next vertebral body, lower plane, from lower plane, upwards arc convex longitudinal edge vertically recessedly respectively to coordinate with to limit arc shaped wing short slot that prosthese deviates from from vertical axial dual side-edge with the arc track of the arcuate groove adaptation of upper plate, lower plane is positioned at central part projection and overlaps with the physiology center of rotation of cervical intervertebral disk and to coordinate the projection deviate from from vertical axial to limit prosthese to form with lower vertebral pulp arc dovetail groove; The recessed arc shaped wing short slot of described upper vertebral pulp longitudinal edge vertically coordinates with the arc track of described upper plate arcuate groove to deviate from from vertical axial to limit prosthese.
3. cervical artificial disc according to claim 2, is characterized in that: on described upper vertebral pulp, the radius of arc convex is equal to or slightly less than the radius of upper plate arcuate groove.
4. cervical artificial disc according to claim 1, is characterized in that: described lower vertebral pulp by upper plane, rotating shaft is parallel with sagittal axis and be positioned at the arc lower face of upper vertebral body, arc dovetail groove that the radially recessed center of rotation in upper plane central position is positioned at spinal column rear pillar, biend vertically form from the radial recessed short slot forming arc shaped wing of the downward arcwall face of upper plane respectively.
5. cervical artificial disc according to claim 4, is characterized in that: the radius in described lower vertebral pulp arc lower face is equal to or slightly less than the radius of lower shoe arc groove.
6. cervical artificial disc according to claim 1, is characterized in that: described upper plate by plate body, the recessed rotating shaft of plate body lower surface parallel with frontal axis and be positioned at the arcuate groove of the next vertebral body, arcuate groove longitudinal edge vertically respectively the recessed recessed arc shaped wing short slot of vertebral pulp longitudinal edge vertically of keeping supplying coordinate and form with the arcuate serrated face set by the rear end of the arcuate serrated face set by the front end limiting arc track that prosthese deviates from from vertical axial, plate body upper surface, plate body upper surface, plane in the middle of upper plate upper surface.
7. cervical artificial disc according to claim 6, it is characterized in that: the serrated face sawtooth direction in arcuate serrated face, described front end backwards, and the serrated face sawtooth direction of described rear end arc serrated face forward, coordinate with the lower surface of the upper vertebral body of cervical vertebra, under the action of gravity of incidence, the upper surface serrated face of upper plate and the lower surface of upper vertebral body form self-locking, location.
8. cervical artificial disc according to claim 6, is characterized in that: the surface spraying of described plane urgees that bone is grown into, fixing titanium valve and hydroxyapatite.
9. cervical artificial disc according to claim 1, is characterized in that: described lower shoe by plate body, the recessed rotating shaft of plate body upper surface parallel with sagittal axis and be positioned at the arc groove of upper vertebral body, projection vertically and the forward and backward two ends of lower vertebral pulp arrange arc shaped wing that short slot forms and coordinate and form with the pawl limiting buckle that prosthese deviates from from vertical axial, the projection of plate body lower surface some the two ends horizontal edge radially of longitudinal edge vertically recessed arc track, arc groove respectively of arc groove respectively.
10. a cervical artificial disc, the vertebral pulp comprising upper plate, lower shoe and be located between upper plate and lower shoe, is characterized in that: the lower vertebral pulp of the arc dovetail groove that described vertebral pulp is nested with supplying described projection by the upper vertebral pulp of the band projection mutually snapped together is formed; Described upper plate coordinates with described upper vertebral pulp, rotates around frontal axis, the anterior flexion and rear stretching function of simulation cervical intervertebral disk, and allows relative micro-translation of upper plate and upper vertebral pulp generation fore-and-aft direction; Described upper vertebral pulp coordinates with described lower vertebral pulp, both can rotate around the rotating shaft of self projection of upper vertebral pulp, can revolve round the sun around the rotational trajectory of the arc dovetail groove of described lower vertebral pulp again, instantaneous variable vertical axis revolving axle is consistent with the physiological status of cervical intervertebral disk, restriction prosthese is deviate from from vertical axial; Described lower vertebral pulp coordinates with described lower shoe, rotates around sagittal axis, bears the motion function of left and right lateral bending; The initial top rake of the cervical artificial disc be consistent with the physiological feature of cervical intervertebral disk 5 °; Described upper plate, described lower shoe can coordinate with the upper vertebral pulp of differing heights series, lower vertebral pulp, with the anatomical features of satisfied different ethnic group cervical intervertebral disk;
Described upper vertebral pulp by rotating shaft parallel with frontal axis and be positioned at the upper arc convex of the next vertebral body, lower plane, dual side-edge be positioned at from the lower plane arc shaped wing short slot that upwards arc convex longitudinal edge is vertically recessed respectively, lower plane the projection that central part projection overlaps with the physiology center of rotation of cervical intervertebral disk and form; The recessed arc shaped wing short slot of described upper vertebral pulp longitudinal edge vertically coordinates with the arc track of upper plate arcuate groove, and restriction prosthese is deviate from from vertical axial;
On described upper vertebral pulp, the radius of arc convex is equal to or slightly less than the radius of upper plate arcuate groove;
Described lower vertebral pulp by upper plane, rotating shaft is parallel with sagittal axis and be positioned at the arc lower face of upper vertebral body, arc dovetail groove that the radially recessed center of rotation in upper plane central position is positioned at spinal column rear pillar, biend vertically form from the radial recessed short slot forming arc shaped wing of the downward arcwall face of upper plane respectively;
The radius in described lower vertebral pulp arc lower face is equal to or slightly less than the radius of lower shoe arc groove;
By plate body, the recessed rotating shaft of plate body lower surface, and the plane that be positioned at the arcuate groove of the next vertebral body, the arcuate serrated face forward and backward two ends set by of plate body upper surface, upper plate upper surface in the middle of parallel with frontal axis forms described upper plate;
The serrated face sawtooth direction in arcuate serrated face, described front end backwards, and the serrated face sawtooth direction of described rear end arc serrated face forward, coordinate with the lower surface of the upper vertebral body of cervical vertebra, under the action of gravity of incidence, the upper surface serrated face of upper plate and the lower surface of upper vertebral body form self-locking, location;
The surface spraying of described plane urgees that bone is grown into, fixing titanium valve and hydroxyapatite;
Described lower shoe by plate body, the recessed rotating shaft of plate body upper surface parallel with sagittal axis and be positioned at the arc groove of upper vertebral body, projection vertically and the forward and backward two ends of lower vertebral pulp arrange arc shaped wing that short slot forms and coordinate and form with the pawl limiting buckle that prosthese deviates from from vertical axial, the projection of plate body lower surface some the two ends horizontal edge radially of longitudinal edge vertically recessed arc track, arc groove respectively of arc groove respectively.
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| CN201210217748.8A CN102727329B (en) | 2012-06-28 | 2012-06-28 | Artificial cervical intervertebral disc |
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| CN201210217748.8A CN102727329B (en) | 2012-06-28 | 2012-06-28 | Artificial cervical intervertebral disc |
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| CN102727329B true CN102727329B (en) | 2015-01-07 |
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| CN105213073B (en) * | 2015-10-21 | 2017-07-07 | 重庆医科大学附属第二医院 | Rear artificial atlanto-odontoid joint |
| CN112085833B (en) * | 2020-08-24 | 2022-09-06 | 南昌大学第一附属医院 | Analysis method for cone beam CT and image fusion combined in-vivo three-dimensional motion of cervical vertebra |
| CN113143548B (en) * | 2021-03-22 | 2023-09-22 | 上海交通大学医学院附属第九人民医院 | Artificial intervertebral disc tissue, construction method, preparation method, computer readable storage medium and equipment |
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| WO2004002291A2 (en) * | 2002-06-26 | 2004-01-08 | Nuvasive, Inc. | Total disc replacement system and related methods |
| DE602004022471D1 (en) * | 2004-09-08 | 2009-09-17 | Synthes | UNIVERSAL DISC PROSTHESIS |
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| US6517580B1 (en) * | 2000-03-03 | 2003-02-11 | Scient'x Societe A Responsabilite Limited | Disk prosthesis for cervical vertebrae |
| CN1720873A (en) * | 2001-05-04 | 2006-01-18 | Ldr医学公司 | Intervertebral disc prosthesis and fitting tools |
| CN1697633A (en) * | 2002-03-30 | 2005-11-16 | 无限整形外科有限公司 | Intervertebral device and method of use |
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| CN102727329A (en) | 2012-10-17 |
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