CN103565561B - Artificial lumbar intervertebral disc - Google Patents
Artificial lumbar intervertebral disc Download PDFInfo
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- CN103565561B CN103565561B CN201310443476.8A CN201310443476A CN103565561B CN 103565561 B CN103565561 B CN 103565561B CN 201310443476 A CN201310443476 A CN 201310443476A CN 103565561 B CN103565561 B CN 103565561B
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- panel
- damping
- top panel
- lower panel
- middle panel
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Classifications
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2/44—Joints for the spine, e.g. vertebrae, spinal discs
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
Abstract
The present invention relates to the artificial prosthesis of the lumbar intervertebral disc of a kind of alternative degeneration.The artificial prosthesis of this lumbar intervertebral disc is made up of top panel, middle panel, rotating shaft ball, damping damping, lower panel；The rotating shaft ball being connected with articulated manner it is provided with in the containing cavity of molding between top panel, middle panel and lower panel；The bulb of this rotating shaft ball is installed with in the ball-and-socket of plate and middle panel forming herein above slidably, and the axle portion of rotating shaft ball is screwed onto in the screw that lower panel is offered, so that top panel can rotate by lower panel relatively；The gap and the arcuate gap that make the relative lower panel of top panel make banking motion it is provided with between middle panel and damping damp and between the concave surface of the convex surface of middle panel and damping damping.
Description
Technical field
The present invention relates to a kind of orthopaedics implantation instrument, particularly to the artificial prosthesis of the lumbar intervertebral disc of a kind of alternative degeneration.
Background technology
Human body lumbar vertebra structural defence intraspinal spinal cord and nerve root, gives trunk stability and motility simultaneously, is the load-carrying members wanted of body weight for humans, and the stress of lumbar vertebra is conducted through " three joint associations " to carry out, including the articular process that intervertebral disc and rear are paired.Intervertebral disc is made up of fibrous ring, vertebral pulp, terminal plate of vertebral body, be human body maximum depletion of blood fortune tissue, tissue regeneration and repair ability are limited, cause that intervertebral disc degeneration is difficult to self and reverses, when the water content of vertebral pulp reduces, elastic and anti-load-bearing capacity goes down significantly, is easy for developing into the intervertebral disc of degeneration.Epidemiological study finds, in linear relation to the incidence rate of geratic period intervertebral disc degeneration and age from adolescence, and old degeneration of intervertebral disc nearly reaches " saturated " state.
For Symptomatic degenerative disc regression patient, as invalid through strict expectant treatment, operative treatment just should be taked.Traditional therapeutic method of surgery is lumbar spinal fusion, and conventional has the decompression operation based on vertebral plate and adopt the fusion method of pedicle screw.The method alleviates lumbar intervertebral disc source property pain, but long-term results shows that many patients recurrence occur in several years after surgery, and re-treatm ent rate is higher.Additionally, fusion makes the activeness permanent loss of operated level, adjacent segment mobility strengthens and causes that regression is accelerated, and changes the original biomechanical environment of spinal column.
Now, another selection scheme for the treatment of Degenerative disc disease is implantable artificial intervertebral disk prosthesis, the method has some potential advantages relative to fusion, including effective alleviating pain, avoid adjacent segment to get involved, can also multi-segmental displacement, it is provided that a kind of in theory can the method for the original biomechanics state of preservation spinal.Current artificial lumbar disc prostheses both domestic and external has multiple design, it is possible to is divided into multi-part and integral type prosthese two kinds, introduces individually below.
Existing artificial lumbar disc prostheses is mostly multi-part prosthese, it is the utilizing works section of learning to do and reaches the motor function of intervertebral disc, mainly by ball-and-socket joint imitate intervertebral disc anteflexion, after stretch, the motion of left and right lateral bending and left rotation and right rotation six-freedom degree, fix typically via metal endplate and upper and lower vertebral body, directly constitute ball-and-socket joint (such as Maverick) between two metal endplate or in the middle of two metals, place polyethylene vertebral pulp composition " sandwich structure " (such as ProDisc, SBCharit é, Mobidisc).The structure of this multi-part design is more ripe with material technology, but the coupled motions that intervertebral disc is complicated cannot be imitated by this design, it is impossible to complete compression and the separation/turgor movement of similar physiology intervertebral disc.
The replacement operation that multi-part prosthese is carried out adopts front to expose vertebral body through peritoneum approach or peritoneum posterior approach mostly, the method wound is big, both the misery of patient had been added, extend again post-operative recovery time, what is more important, as revision procedure need to be carried out, art occur massive hemorrhage or having a big risk of embolic complications are approximately 6 times of initial surgery.Therefore, it is achieved lateral approach or Anteroposterior aproach implant prosthese, or carry out minimal invasive operation, it is one of main points of artificial lumbar disc studying new construction now.And, the integrated design of prosthese, it is also possible to simplify equipment list so that the learning curve of lumbar intervertebral disc implant surgery is tended towards stability by doctor, reduces technical error when implanting.
Existing integration prosthese mainly has FlexiCore prosthese, employing all-metal designs, two soleplates connect and set up axial-rotation and other motor functions by central authorities' ball-and-socket joint, prosthese ball-and-socket joint before passing doctor has assembled simultaneously, tension load structure is possible to prevent separation and the dislocation on load surface, and prosthese can carry out multi-angle operation according to the custom of doctor and insert.But the elastic modelling quantity that the design of the all-metal of this prosthese makes prosthese is bigger, easily produce stress-shielding effect, owing to this prosthese lacks load absorbency after inserting human body, adjacent intervertebral disc must be born by extra load, even result in the premature degradation of adjacent disc, the unit area loading that metal brings is relatively big, has the risk occurring prosthese to be absorbed in vertebra after inserting, and the Follow-up After of this prosthese has no extensive report.
Existing prosthetic designs is mostly multicomponent structure, adopts front road through the outer approach of peritoneum or peritoneum, and wound is big, and operation risk is big.Adopting the prosthese such as FlexiCore of integrated design, owing to adopting all-metal construction, elastic modelling quantity is far longer than the elastic modelling quantity of cortical bone, there is stress shielding and prosthese subsides risk.
Summary of the invention
It is an object of the invention to overcome above-mentioned weak point of the prior art, a kind of metal material and macromolecular material is provided to combine the integrated prosthese made, except allowing spinal surgery doctor to implant prosthese from different perspectives according to custom, it is also possible to effectively avoid the artificial lumbar intervertebral disc that the prosthese load caused in human body is excessive, stress shielding, prosthese subside equivalent risk.
The technical solution of the present invention is described artificial lumbar intervertebral disc, and it is characterized in that and is made up of top panel, middle panel, rotating shaft ball, damping damping, lower panel；The rotating shaft ball being connected with articulated manner it is provided with in the containing cavity of molding between top panel, middle panel and lower panel；The bulb of this rotating shaft ball is installed with in the ball-and-socket of plate and middle panel forming herein above slidably, and the axle portion of rotating shaft ball is screwed onto in the screw that lower panel is offered, so that top panel can rotate by lower panel relatively；The gap and the arcuate gap that make the relative lower panel of top panel make banking motion it is provided with between middle panel and damping damp and between the concave surface of the convex surface of middle panel and damping damping.
As preferably: the surface that top panel, lower panel contact with vertebral body is respectively provided with central dome-shaped projection；Top panel and middle panel and damping damping and lower panel are connected each through bolt or select the connection of other component: groove is with spring connecting mechanism, lead convex tail and corresponding recessed bindiny mechanism, snap fastener, bonding agent, ultrasonic bonding, screw, joinery and its construction.
As preferably: central dome-shaped projection is selected following a kind of with the molding mode of panel:
(1) this central dome-shaped projection is one-body molded with panel；
(2) the wire mesh grid that this central dome-shaped projection and panel are combined as a whole, described wire mesh grid makes deformation process when implanting human body, to be suitable for the concave surface of upper vertebral body, hypocentrum；
(3) the porous convex metallic body that this central dome-shaped projection and panel are combined as a whole, to promote that osseous tissue is grown into.
As preferably: being provided with the central top panel of dome-shaped projection and the surface of lower panel, to be provided with mean for the tooth that the label of Radiolucent and several and vertebral body initially fix prominent；It is provided with top panel surface and lower panel surface spraying biological activity or the bone induction material of central dome-shaped projection.
As preferably: described biological activity or bone induction material are selected: coating that titanium coating, hydroxyapatite coating layer, titanium and calcium phosphate are made, calcium silicates coating, tantalum coating one；Or, adopt embossed surface, corrugated surface to stop the relative sliding on the surface of top panel and the surface of lower panel with upper vertebral body, hypocentrum soleplate.
As preferably: the arcuate section between the joint that ball-and-socket is formed, middle panel convex surface and damping damping concave surface, the position of set angle of being separated by is equipped with the detent mechanism that restriction artificial lumbar intervertebral disc excessively rotates；That is: the bulb of rotating shaft ball arranges relative projection and recessed with the ball-and-socket place of top panel, middle panel, or, adopt embossing, groove, acid etching, be sintered in the globule on surface, be etched in the texture on surface so that panel can not continue after rotating to this position to rotate；The joint that ball-and-socket is formed, middle panel convex surface contact the surface of arcuate section with damping damping, are provided with importing tissue fluid to lubricate prosthetic surface, it is ensured that the groove of fluidity of motion.
As preferably: the concave surface that the convex surface of described middle panel damps with damping tapers on the side, rotation and inclination for artificial lumbar intervertebral disc produce more " play "；The marginal portion that middle panel is relative with damping damping is provided with angular aperture, and the edge that this angular aperture is the relative damping damping concave inclination of middle panel convex surface and/or level slip is formed；This angular aperture is arranged in middle panel or damping damping, or both has；So, the anglec of rotation can be increased when artificial lumbar intervertebral disc completes laterally to rotate, gap-closing occur in middle panel convex surface and the terminal contact process of damping damping concave surface, stops and rotate.
As preferably: following a kind of material selected respectively by top panel, middle panel, lower panel and rotating shaft ball:
Metal group material: titanium alloy, zircaloy, tantalum alloy；Preferred: vitallium；
Ceramic-like materials: aluminium oxide, zirconium oxide；
Following a kind of material is selected in damping damping:
Ultra-high molecular weight polyethylene (UHMWPE), polymethyl methacrylate (PMMA), polyether-ether-ketone (PEEK)；Preferred: polyurethane.
As preferably: adapt to cartilage endplate and developed gradually the top panel of ovalisation state, middle panel, lower panel by kidney shape, select following a kind of shape: ellipse, oval, kidney shape, round rectangle, D-shaped.
Another technical solution of the present invention is described artificial lumbar intervertebral disc, and it is characterized in that and is made up of top panel, middle panel, rotating shaft ball, damping damping, lower panel；The rotating shaft ball being connected with articulated manner it is provided with in the containing cavity of molding between top panel, middle panel and lower panel；The bulb of this rotating shaft ball is installed with in the ball-and-socket of plate and middle panel forming herein above slidably, and the axle portion of rotating shaft ball is screwed onto in the screw that lower panel is offered, so that top panel can rotate by lower panel relatively；The gap and the arcuate gap that make the relative lower panel of top panel make banking motion it is provided with between middle panel and damping damp and between the concave surface of the convex surface of middle panel and damping damping；The surface that top panel, lower panel contact with vertebral body is respectively provided with central dome-shaped projection；Top panel and middle panel and damping damping and lower panel are connected each through bolt or select removably mode connected mode: groove is with spring connecting mechanism, lead convex tail and corresponding recessed bindiny mechanism, snap fastener, bonding agent, ultrasonic bonding, screw, joinery and its construction；The dome-shaped projection of central authorities is selected following a kind of with the molding mode of panel:
(1) this central dome-shaped projection is one-body molded with panel；
(2) the wire mesh grid that this central dome-shaped projection and panel are combined as a whole, described wire mesh grid makes deformation process when implanting human body, to be suitable for the concave surface of upper vertebral body, hypocentrum；
(3) the porous convex metallic body that this central dome-shaped projection and panel are combined as a whole, to promote that osseous tissue is grown into；
Being provided with the central top panel of dome-shaped projection and the surface of lower panel, to be provided with mean for the tooth that the label of Radiolucent and several and vertebral body initially fix prominent；It is provided with top panel surface and lower panel surface spraying biological activity or the bone induction material of central dome-shaped projection；Described biological activity or bone induction material are selected: coating that titanium coating, hydroxyapatite coating layer, titanium and calcium phosphate are made, calcium silicates coating, tantalum coating one；Or, adopt embossed surface, corrugated surface to stop the relative sliding on the surface of top panel and the surface of lower panel with upper vertebral body, hypocentrum soleplate；
Arcuate section between the joint that ball-and-socket is formed, middle panel convex surface and damping damping concave surface, the position of set angle of being separated by is equipped with the detent mechanism that restriction artificial lumbar intervertebral disc transition excessively rotates；That is: the bulb of rotating shaft ball arranges relative projection and recessed with the ball-and-socket place of top panel, middle panel, or, adopt embossing, groove, acid etching, be sintered in the globule on surface, be etched in the texture on surface so that panel can not continue after rotating to this position to rotate；The joint that ball-and-socket is formed, middle panel convex surface contact the surface of arcuate section with damping damping, are provided with importing tissue fluid to lubricate prosthetic surface, it is ensured that the groove of fluidity of motion；
The concave surface that the convex surface of described middle panel damps with damping tapers on the side, and rotation and inclination for artificial lumbar intervertebral disc produce more " play "；The marginal portion that middle panel is relative with damping damping is provided with angular aperture, and the edge that this angular aperture is the relative damping damping concave inclination of middle panel convex surface and/or level slip is formed；This angular aperture is arranged in middle panel or damping damping, or both has；So, the anglec of rotation can be increased when artificial lumbar intervertebral disc completes laterally to rotate, gap-closing occur in middle panel convex surface and the terminal contact process of damping damping concave surface, stops and rotate；
Following a kind of material selected respectively by top panel, middle panel, lower panel and rotating shaft ball:
Metal group material: titanium alloy, zircaloy, tantalum alloy；Preferred: vitallium；
Ceramic-like materials: aluminium oxide, zirconium oxide；
Following a kind of material is selected in described damping damping；
Ultra-high molecular weight polyethylene (UHMWPE), polymethyl methacrylate (PMMA), polyether-ether-ketone (PEEK)；Preferred: polyurethane；
Adapt to cartilage endplate developed gradually the top panel of ovalisation state, middle panel, lower panel by kidney shape, select following a kind of shape: ellipse, oval, kidney shape, round rectangle, D-shaped.
Compared with prior art, the present invention has good effect as described below:
The artificial lumbar intervertebral disc of the present invention is integral type prosthese, it is possible to maximizing and reduce implantation instrument inventory, make doctor easy and simple to handle, learning curve slows down significantly, also can implant prosthese from different perspectives according to doctor's custom.Owing to this artificial lumbar intervertebral disc have employed the mode of metal material and macromolecular material combination; the deficiency that elastic modelling quantity is big and quality is big that this artificial lumbar intervertebral disc material overcomes all-metal prosthese; avoid stress shielding; reduce the danger that artificial lumbar intervertebral disc sink; additionally; macromolecular material can absorption portion load, adjacent segment intervertebral disc is played a protective role.
Accompanying drawing explanation
Fig. 1 is the STRUCTURE DECOMPOSITION schematic diagram of artificial lumbar intervertebral disc of the present invention.
Fig. 2 is the Standard profile of artificial lumbar intervertebral disc of the present invention.
Fig. 3 is the Facad structure axonometric chart of artificial lumbar intervertebral disc top panel of the present invention.
Fig. 4 is the inverse layer structure axonometric chart of artificial lumbar intervertebral disc top panel of the present invention.
Fig. 5 is the Facad structure axonometric chart of panel in artificial lumbar intervertebral disc of the present invention.
Fig. 6 is the inverse layer structure axonometric chart of panel in artificial lumbar intervertebral disc of the present invention.
Fig. 7 is the Facad structure axonometric chart of artificial lumbar intervertebral disc damping of the present invention damping.
Fig. 8 is the inverse layer structure axonometric chart of artificial lumbar intervertebral disc damping of the present invention damping.
Fig. 9 is the Facad structure axonometric chart of artificial lumbar intervertebral disc lower panel of the present invention.
Figure 10 is the inverse layer structure axonometric chart of artificial lumbar intervertebral disc lower panel of the present invention.
Detailed description of the invention
The present invention is further detailed in conjunction with the accompanying drawings below:
Referring to shown in Fig. 1, described artificial lumbar intervertebral disc is made up of top panel 1, middle panel 2, rotating shaft ball 3, damping damping 4, lower panel 5；The ball-and-socket 15 that tooth that on plate face between two screws 13 that the dome-shaped projection of central authorities 12 of the surface projection that top panel 1 is contacted with vertebral body by the top of ellipse 11, ellipse 11, the screw 13 all laid of periphery of centrally located dome-shaped projection 12, spacing are short, symmetrical projection and vertebral body are initially fixed is prominent 14, the bottom of ellipse 11 is recessed forms；Middle panel 2 by ellipse 21, the bottom projection of ellipse 21 convex surface 22, be positioned at screw 23 that the periphery of convex surface 22 all lays, ball-and-socket 24 that the middle thereof of ellipse 21 is offered forms；Damping damping 4 by the through concave surface 42 of shape at the bottom of the recessed central vault in the top of ellipse 41, ellipse 41, be positioned at the screw 44 that the periphery of the bottom perforated 43 of ellipse 41 all lays and form；The screw 55 that on plate face between two screws 53 that the dome-shaped projection of central authorities 52 of the surface projection that lower panel 5 is contacted with vertebral body by the bottom of ellipse 51, ellipse 51, the screw 53 all laid of periphery of centrally located dome-shaped projection 52, spacing are short, the tooth of symmetrical projection is prominent 54, the top of ellipse 51 is recessed forms.
It is provided with, in the ball-and-socket 15,24 of molding between top panel 1, middle panel 2 and lower panel 5, the rotating shaft ball 3 being connected with articulated manner；The bulb 31 of this rotating shaft ball 3 is installed with in the ball-and-socket 15,24 of plate 1 and the molding of middle panel 2 herein above slidably, and the axle portion 32 of rotating shaft ball 3 is screwed onto in the screw 55 that lower panel 5 is offered, thus, make top panel 1 relatively to rotate by lower panel 5；Middle panel 2 and damping damp between 4 and are provided with the gap 25 and the arcuate gap 26 that make the relative lower panel 5 of top panel 1 make banking motion between the concave surface 42 of the convex surface 22 of middle panel 2 and damping damping 4, wherein；Top panel 1 is connected by bolt 6 with middle panel 2；Damping damping 4 is connected by bolt 8 with lower panel 5.Top panel 1 damps 4 with middle panel 2 and damping and also can be selected for following detachably connected mode with lower panel 5: groove is with spring connecting mechanism, lead convex tail and corresponding recessed bindiny mechanism, snap fastener, bonding agent, ultrasonic bonding, screw, joinery and its construction.Ball-and-socket joint 15,24 between top panel 1 and middle panel 2 can be arranged on the centre of artificial lumbar intervertebral disc, the position of inclined human body veutro or human body dorsal part can also be arranged on, except the part of ball-and-socket joint 15,24 between top panel 1 and middle panel 2, middle panel 2 damps 4 parts contacted with damping should increase contact area as far as possible, so that load is delivered in lower panel 5 and lower vertebra uniformly.
In the present embodiment, the molding mode of the dome-shaped projection 12,52 of described central authorities and top panel 1, lower panel 5 is selected following a kind of:
(1) this central dome-shaped projection 12,52 and top panel 1, lower panel 5 are one-body molded；
(2) the wire mesh grid (not shown) that this central dome-shaped projection 12,52 and top panel 1, lower panel 5 are combined as a whole, described wire mesh grid makes deformation process when implanting human body, to be suitable for the concave surface of upper vertebral body, hypocentrum；
(3) the porous convex metallic body (not shown) that this central dome-shaped projection 12,52 and top panel 1, lower panel 5 are combined as a whole, promotes that osseous tissue is grown into.
In the present embodiment, arcuate section between the joint that ball-and-socket 15,24 is formed, middle panel convex surface 22 and damping damping concave surface 42, as being equipped with the detent mechanism (not shown) that restriction artificial lumbar intervertebral disc excessively rotates at the position of be separated by 180 ° or 90 °, 60 °；That is: the bulb 31 of rotating shaft ball 3 arranges relative projection and recessed (not shown) with ball-and-socket 15,24 place of top panel 1, middle panel 2, or, adopt embossing, groove, acid etching, be sintered in the globule on surface, be etched in the texture on surface so that panel can not continue after rotating to this position to rotate or rotate difficulty；The joint that ball-and-socket 15,24 is formed, middle panel convex surface 22 contact the surface in concave surface hole 2 with damping damping, are provided with importing tissue fluid, lubricate prosthetic surface, it is ensured that the groove (not shown) of fluidity of motion.
In the present embodiment, the surface of the top panel 1 and lower panel 5 that are provided with central dome-shaped projection 12,52 is provided with mean for the label (not shown) of Radiolucent.Owing to lumbar vertebra soleplate compressive resistance periphery is more than central authorities, rear portion is more than front portion, so the component that artificial lumbar intervertebral disc top panel 1, lower panel 5 are used for initially fixing with vertebral body is arranged on outside or rear portion, spinal disc prosthesis surface completes to fix with the initial of vertebral body by six teeth prominent 14,54, often three distributions of group, are distributed in left and right side, it is also possible to tooth prominent 14,54 is fixed on rear flank side, tooth prominent 14,54 can be continuously arranged, it is also possible to is spaced.Except tooth prominent 14,54, it is preferred that alternative structure includes the (not shown) such as Os Draconis, spike, hook, screw, hook.Be provided with the surface of top panel 1 of central dome-shaped projection 12,52 and the surface spraying biological activity of lower panel 5 or bone induction material, select: coating that titanium coating, hydroxyapatite coating layer, titanium and calcium phosphate are made, calcium silicates coating, tantalum coating one；Or, adopt embossed surface, corrugated surface to stop the relative sliding on the surface of top panel 1 and the surface of lower panel 5 with upper vertebral body, hypocentrum soleplate.
In the present embodiment, the ventrad and dorsad radius of curvature of the concave surface 42 of the convex surface 22 of middle panel 2 and damping damping 4 keeps the constant distance being derived from same circle, it is also possible to for having different radii but having two circles at identical midpoint.
In the present embodiment, two arch curved surfaces can also not keep constant distance mutually, and is laterally being oppositely arranged or it has the distance of increase between lateral.The convex surface 22 of middle panel 2 and corresponding damping damping concave surface 42 can taper on the side, to produce more " play " to the rotation of panel and inclination.The contact area of the concave surface 42 that the convex surface 22 of middle panel 2 damps 4 with damping can also increase, and this can improve the materials ' durability in articulation region.Middle panel 2 damps 4 relative marginal portions and is provided with angular aperture (not shown) with damping, and described angular aperture is tilted by damping damping concave surface 42 relative to adjacent middle panel convex surface 22 and/or edge that level is slided is formed；This angular aperture is arranged in middle panel 2 or damping damping 4, or both has；So, the anglec of rotation can be increased when artificial lumbar intervertebral disc completes laterally to rotate, gap-closing occur in middle panel convex surface 22 and the terminal contact process of damping damping concave surface 42, rotation could be stoped.
In the present embodiment, described top panel 1, middle panel 2, lower panel 5 and rotating shaft ball 3 are selected from set below material:
Metal group material: titanium alloy, zircaloy, tantalum alloy, it is preferable that vitallium；
Ceramic-like materials: aluminium oxide, zirconium oxide；
Described damping damping is selected from set below material:
Ultra-high molecular weight polyethylene (UHMWPE), polymethyl methacrylate (PMMA), polyether-ether-ketone (PEEK), it is preferable that polyurethane.
In the present embodiment, described top panel 1, middle panel 2, lower panel 5, adapt to cartilage endplate and developed into the form of ellipse by kidney shape gradually, select following a kind of shape: ellipse, oval, kidney shape, round rectangle, D-shaped.
In the present embodiment, the range scale of this artificial lumbar intervertebral disc is, width (transverse diameter) 28～45mm, length (radius vector) 24～35mm, height 7～17mm.This artificial lumbar intervertebral disc needs to substantially take up the interbody space after removing physiology intervertebral disc after inserting human body, " substantially taking up " it is meant that described dish occupies the surface area of at least about 50%, the perhaps at least about surface area of 80% or more.
The motion function of artificial lumbar intervertebral disc of the present invention is determined by following factor:
(1) the back of the body ventrad tilting procedure between middle panel 2 and the damping damping 4 of relative sliding, depends on ventrad and damps around the respective edges in ball-and-socket 15,24 articulation region and middle panel convex surface, damping dorsad height and the radius of curvature of 4 concave surfaces.
(2) it is provided with gap and angular aperture between middle panel 2 and damping damping 4, angular aperture is by being formed with the edge of the middle panel 2 of relative sliding with damping damping 4 inclination and/or level, wherein gap-closing occurs in the middle panel 2 of relative sliding with the terminal contact process of damping damping 4.
(3) the middle panel 2 of relative sliding and damping damping 4 rotation relative to rotating shaft 32 axle center, is respectively depending on the tolerance between bow action and this bow action degree, middle panel convex surface 22 and the damping damping concave surface 42 of middle panel convex surface 22 and corresponding damping damping concave surface 42.
The foregoing is only presently preferred embodiments 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 (5)
1. an artificial lumbar intervertebral disc, is made up of top panel, middle panel, rotating shaft ball, damping damping, lower panel；Top panel, between middle panel and lower panel, form containing cavity；The rotating shaft ball connected with articulated manner it is installed with in described containing cavity；The bulb of this rotating shaft ball is installed with in the ball-and-socket of plate and middle panel forming herein above slidably, and the axle portion of rotating shaft ball is screwed onto in the screw that lower panel is offered, so that top panel can rotate by lower panel relatively；Middle panel and damping are provided with the gap making the relative lower panel of top panel make banking motion between damping, be provided with the arcuate gap making the relative lower panel of top panel make banking motion in namely between convex surface and the concave surface that damping damps of panel；The surface that top panel, lower panel contact with vertebral body is respectively provided with central dome-shaped projection；Top panel and middle panel are bolted；Damping damping is connected also by bolt with lower panel；It is characterized in that, between described top panel and described middle panel and between damping damping and described lower panel, also can be selected for following detachably connected mode:
Groove and spring connecting mechanism, screw, the convex tail of guiding and corresponding recessed bindiny mechanism, snap fastener, bonding agent, ultrasonic bonding, joinery and its construction；
Described artificial lumbar intervertebral disc is provided with the top panel surface of central dome-shaped projection and the lower panel surface being provided with central dome-shaped projection, and to be equipped with the tooth that the label for Radiolucent and several and vertebral body initially fix prominent；The top panel surface being provided with central dome-shaped projection and the lower panel surface spraying biological activity being provided with central dome-shaped projection or bone induction material；Described biological activity or bone induction material are selected:
Coating that titanium coating, hydroxyapatite coating layer, titanium and calcium phosphate are made, calcium silicates coating, tantalum coating one；
Top panel surface configuration is embossed surface or corrugated surface, to stop the relative sliding on top panel surface and upper terminal plate of vertebral body；Lower panel surface is also configured as embossed surface or corrugated surface, the relative sliding on surface Yu hypocentrum soleplate to stop lower panel；The concave surface that the convex surface of described middle panel damps with damping tapers on the side, and rotation and inclination for artificial lumbar intervertebral disc produce more " play "；The marginal portion that middle panel is relative with damping damping is provided with angular aperture, the formation of this angular aperture: is damped, by middle panel convex surface and damping, the edge that between concave surface, inclination and/or level are slided and is formed；This angular aperture is arranged in middle panel or damping damping, or both has；So, the anglec of rotation can be increased when artificial lumbar intervertebral disc completes laterally to rotate, gap-closing occur in middle panel convex surface and the terminal contact process of damping damping concave surface, stops and rotate.
2. artificial lumbar intervertebral disc according to claim 1, it is characterized in that: the cross section between the joint that ball-and-socket is formed, middle panel convex surface and damping damping concave surface is arch portion, and the position of set angle of being separated by is equipped with the detent mechanism that restriction artificial lumbar intervertebral disc excessively rotates；That is: the bulb of rotating shaft ball arranges relative projection and recessed with the ball-and-socket place of top panel, middle panel, or, adopt embossing, groove, acid etching, be sintered in the globule on surface, be etched in the texture on surface so that panel can not continue to rotate after rotating to the position of this detent mechanism；The joint that ball-and-socket is formed, middle panel convex surface contact the surface of arcuate section with damping damping, are provided with importing tissue fluid to lubricate prosthetic surface, it is ensured that the groove of fluidity of motion.
3. artificial lumbar intervertebral disc according to claim 1 or claim 2, it is characterised in that: following a kind of material selected respectively by top panel, middle panel, lower panel and rotating shaft ball:
Metal group material: zircaloy, tantalum alloy；
Ceramic-like materials: aluminium oxide, zirconium oxide；
Following a kind of material is selected in damping damping:
Polymethyl methacrylate (PMMA), polyether-ether-ketone (PEEK).
4. artificial lumbar intervertebral disc according to claim 1 or claim 2, it is characterized in that: adapt to cartilage endplate and developed gradually the top panel of ovalisation state, middle panel, lower panel by kidney shape, select following a kind of shape: ellipse, oval, kidney shape, round rectangle, D-shaped.
5. an artificial lumbar intervertebral disc, it is characterised in that: it is made up of top panel, middle panel, rotating shaft ball, damping damping, lower panel；Top panel, between middle panel and lower panel, form containing cavity；The rotating shaft ball connected with articulated manner it is installed with in described containing cavity；The bulb of this rotating shaft ball is installed with in the ball-and-socket of plate and middle panel forming herein above slidably, and the axle portion of rotating shaft ball is screwed onto in the screw that lower panel is offered, so that top panel can rotate by lower panel relatively；Middle panel and damping are provided with the gap making the relative lower panel of top panel make banking motion between damping, be provided with the arcuate gap making the relative lower panel of top panel make banking motion in namely between convex surface and the concave surface that damping damps of panel；The surface that top panel, lower panel contact with vertebral body is respectively provided with central dome-shaped projection；Top panel and middle panel are bolted；Damping damping is connected also by bolt with lower panel；Following detachably connected mode is also can be selected for: groove is with spring connecting mechanism, lead convex tail and corresponding recessed bindiny mechanism, snap fastener, bonding agent, ultrasonic bonding, screw, joinery and its construction between described top panel with described middle panel and between damping damping and described lower panel；
The dome-shaped projection of central authorities is selected following a kind of with the molding mode of panel:
(1) this central dome-shaped projection is one-body molded with panel；
(2) the wire mesh grid that this central dome-shaped projection and panel are combined as a whole, described wire mesh grid makes deformation process when implanting human body, to be suitable for the concave surface of upper vertebral body, hypocentrum；
(3) the porous convex metallic body that this central dome-shaped projection and panel are combined as a whole, to promote that osseous tissue is grown into；
Being provided with the top panel surface of central dome-shaped projection and the lower panel surface being provided with central dome-shaped projection, to be equipped with the tooth that the label for Radiolucent and several and vertebral body initially fix prominent；The top panel surface being provided with central dome-shaped projection and the lower panel surface spraying biological activity being provided with central dome-shaped projection or bone induction material；Described biological activity or bone induction material are selected: coating that titanium coating, hydroxyapatite coating layer, titanium and calcium phosphate are made, calcium silicates coating, tantalum coating one；Top panel surface adopts embossed surface or corrugated surface, to stop the relative sliding on top panel surface and upper terminal plate of vertebral body；Lower panel surface is also configured as embossed surface or corrugated surface, the relative sliding on surface Yu hypocentrum soleplate to stop lower panel；
Cross section between the joint that ball-and-socket is formed, middle panel convex surface and damping damping concave surface is arch portion, and the position of set angle of being separated by is equipped with the detent mechanism that restriction artificial lumbar intervertebral disc transition rotates；That is: the bulb of rotating shaft ball arranges relative projection and recessed with the ball-and-socket place of top panel, middle panel, or, adopt embossing, groove, acid etching, be sintered in the globule on surface, be etched in the texture on surface so that panel can not continue to rotate after rotating to the position of this detent mechanism；The joint that ball-and-socket is formed, middle panel convex surface contact the surface of arcuate section with damping damping, are provided with importing tissue fluid to lubricate prosthetic surface, it is ensured that the groove of fluidity of motion；
The concave surface that the convex surface of described middle panel damps with damping tapers on the side, and rotation and inclination for artificial lumbar intervertebral disc produce more " play "；The marginal portion that middle panel is relative with damping damping is provided with angular aperture, the formation of this angular aperture: is damped, by middle panel convex surface and damping, the edge that between concave surface, inclination and/or level are slided and is formed；This angular aperture is arranged in middle panel or damping damping, or both has；So, the anglec of rotation can be increased when artificial lumbar intervertebral disc completes laterally to rotate, gap-closing occur in middle panel convex surface and the terminal contact process of damping damping concave surface, stops and rotate；
Following a kind of material selected respectively by top panel, middle panel, lower panel and rotating shaft ball:
Metal group material: titanium alloy, zircaloy, tantalum alloy, vitallium；
Ceramic-like materials: aluminium oxide, zirconium oxide；
Following a kind of material is selected in described damping damping；
Ultra-high molecular weight polyethylene (UHMWPE), polymethyl methacrylate (PMMA), polyether-ether-ketone (PEEK), polyurethane；
Adapt to cartilage endplate developed gradually the top panel of ovalisation state, middle panel, lower panel by kidney shape, select following a kind of shape: ellipse, oval, kidney shape, round rectangle, D-shaped.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310443476.8A CN103565561B (en) | 2013-09-26 | 2013-09-26 | Artificial lumbar intervertebral disc |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310443476.8A CN103565561B (en) | 2013-09-26 | 2013-09-26 | Artificial lumbar intervertebral disc |
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| CN103565561A CN103565561A (en) | 2014-02-12 |
| CN103565561B true CN103565561B (en) | 2016-07-06 |
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| CN201310443476.8A Expired - Fee Related CN103565561B (en) | 2013-09-26 | 2013-09-26 | Artificial lumbar intervertebral disc |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107822748A (en) * | 2017-09-30 | 2018-03-23 | 四川大学华西医院 | A kind of artificial intelligence Cervical zygapophyseal joint prosthese |
| CN108379665B (en) * | 2018-03-12 | 2020-11-03 | 四川大学 | Double-gradient artificial vertebral plate and preparation method thereof |
| CN110934669A (en) * | 2019-12-10 | 2020-03-31 | 佛山市逸合生物科技有限公司 | Intervertebral disc movable prosthesis |
| CN112972073B (en) * | 2021-04-20 | 2022-04-12 | 北京爱康宜诚医疗器材有限公司 | Vertebral body prosthesis |
| CN113403603A (en) * | 2021-06-18 | 2021-09-17 | 燕山大学 | Method for preparing tantalum coating on surface of zirconium alloy |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| DE8912648U1 (en) * | 1989-10-23 | 1990-11-22 | Mecron Medizinische Produkte Gmbh, 1000 Berlin, De | |
| US5893889A (en) * | 1997-06-20 | 1999-04-13 | Harrington; Michael | Artificial disc |
| US6989032B2 (en) * | 2001-07-16 | 2006-01-24 | Spinecore, Inc. | Artificial intervertebral disc |
| US20070276492A1 (en) * | 2006-05-09 | 2007-11-29 | Ranier Limited | Artificial spinal disc implant |
| WO2009036380A1 (en) * | 2007-09-12 | 2009-03-19 | Life Spine, Inc. | Spinal interbody device |
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