CN103800101A - Dislocation prevention type non-fusion artificial cervical vertebra and intervertebral disc system - Google Patents
Dislocation prevention type non-fusion artificial cervical vertebra and intervertebral disc system Download PDFInfo
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- CN103800101A CN103800101A CN201410072192.7A CN201410072192A CN103800101A CN 103800101 A CN103800101 A CN 103800101A CN 201410072192 A CN201410072192 A CN 201410072192A CN 103800101 A CN103800101 A CN 103800101A
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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
-
- 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 invention discloses a dislocation prevention type non-fusion artificial cervical vertebra and intervertebral disc system comprising a vertebra body component and two end plate components, wherein the end plate components are connected to the upper end and the lower end of the vertebra body component respectively through a dome joint structure and L-type dislocation prevention structures on the front side and the rear side. End plate fixing screws are arranged on the two end plate components respectively. After corpectomy, the system can play a role in supporting at once, the motion function of the normal cervical vertebra is replaced through own interbody connecting parts, stress of the cervical vertebra can be dispersed in the motion process, internal stress of adjacent segment intervertebral discs and zygapophyseal joints can be reduced, and degeneration, which is caused by fusion, of the adjacent segments can be effectively prevented. In addition, stable bony fusion can be achieved through bone grafting and a hydroxyapatite coating on the surface of the system. The operation difficulty is small, trauma is small, and the system is convenient to popularize. Due to the fact that the dislocation prevention positions of the system are arranged, long-period stability can be achieved after the operation.
Description
Technical field
The invention belongs to medical prosthesis manufacturing technology field, relate to a kind of artificial cervical and intervertebral disc system, the non-fusion artificial cervical of especially a kind of anti-dislocation formula and intervertebral disc system.
Background technology
Cervical vertebral body time full excision decompression and fusion (anterior cervical corpectomy with fusion, ACCF) is that treatment cervical spondylosis, fracture of cervical vertebral body companion spinal compression person or Old joint fracture dislocation merge the more conventional modus operandis such as incomplete spinal cord injury at present.This art formula takes premenstrual road to appear corresponding vertebral body and intervertebral disc; lay respectively vertebral body nail adjacent upper and lower 2 vertebral bodys of vertebral body of intending excision; excision two ends pathological interspinal dish; then at large portion vertebral body and the posterior longitudinal ligament of this vertebra of bilateral uncovertebral joint (Luschka's joint) inner row Subtotal vertebrectomy; fully decompression in the situation that spinal cord and nerve root obtain protection; be implanted into bone graft piece (autologous/allosome) or the titanium cage (filling spongy bone) of appropriate length at relief groove, select suitable anterior approach steel plate to fix and upper hypocentrum.The advantage of this art formula is to obtain immediate postoperative stability, and for the recovery of function of nervous system provides stable biomechanics environment, a large amount of clinical researches have confirmed that it has good operative effect.But long-term follow-up investigation is found the problems such as some patients were postoperatively exists bone graft piece to absorb to subside, become flexible, come off, the sinking of titanium cage.Biomechanics Research shows, the corresponding vertebral body unit motion of post-fusion afunction, and neighbouring section intervertebral disc is interior, zygapophysial joints internal pressure increases and stress transfer.On iconography, some patients were shows as degeneration of intervertebral disc or outstanding, intervertebral altitude loss, contiguous vertebral body or the formation of little joint hyperosteogeny, spinal column sequence variation, segmental unstability or slippage, can there is spinal canal stenosis in severe patient, cause spinal compression, causes serious nervous symptoms.Hilibrand etc. have reported the long term follow-up of 374 examples because of cervical spondylosis row Anterior cervical fusion art, and personal attendant visits 21 years, find that Adjacent segment disease occurs that the Annual occurence rate of symptom is 2.9%, within postoperative 10 years, have 25.6% case to occur Adjacent segment disease.（Hilibrand?AS,Carlson?GD,Palumbo?MA,et?al.Radiculopathy?and?myelopathy?at?segments?adjacent?to?the?site?of?a?previous?anterior?cervical?arthrodesis[J].Journal?of?Bone?and?Joint?Surgery-American?Volume,1999,81A(4):519-528.）
For effectively avoiding implant the problem such as to subside, become flexible, there is scholar to start the stability that implantable artificial vertebral body maintained or rebuild spinal column in some patients were, to obtain biomechanics environment steady in a long-term.Hamdi in 1969 be first reported in Lumber Vertebra Tumors patient implantable artificial vertebral body (Hamdi FA.Prosthesis for an excised lumbar vertebra:a preliminary report[J] .Canadian Medical Association Journal, 1969,100 (12): 576.).Subsequently people are updated artificial vertebral body, engender the metal material better with the tissue compatibility, advanced composite material (ACM) etc., fixed form also fixedly develops into current simple self-locking artificial vertebral body implantation by original steel plate or the auxiliary fusion of nail rod and merges fixing, and bio-active material coating processing is carried out in artificial vertebral body surface, to reach and the more good object merging of surrounding bone knot, develop into and can strut fixed pattern artificial vertebral body by early stage simple support type simultaneously, now also there is the artificial vertebral body of the adjustable height that is applicable to different crowd.Observe and find for artificial vertebral body Clinical Follow-up, prosthese can obtain good stability, spinal column sequence, vertebral height etc. after implanting.Lv Chaoliang, Song Yueming etc. are to the lower fracture-dislocation of cervical spine patient Hang Qian of 84 examples road Subtotal vertebrectomy, spinal canal decompression, with n-HA/PA66 vertebral body support body supports bone grafting, steel plate screw internal fixation treatment, schedule to last 6-24 month follow up a case by regular visits to and find all patient's bone-graft fusion of Image examinations showed, cervical vertebra sequence, vertebra ask that the position of height, cervical stability and supporter maintains well, and supporter is without sinking, being shifted.(Lv Chaoliang, Song Yueming, Liu Hao etc. the application [J] of nanometer hydroxyapatite/polyamide 66 vertebral body supporter in lower fracture-dislocation of cervical spine anterior approach is rebuild. Chinese surgical magazine, 2012,50 (4): 338-341.)
But above-mentioned artificial vertebral body is not broken through this limitation of Adjacent segment degeneration due to fusion.The movable technique for fixing of spinal column appear at the problem that has solved post-fusion Adjacent segment degeneration in theory.Do exercises function and biomechanical characterization that it can keep spinal column, can also recover disc height and spinal column sequence.Cervical artificial disc replacement extensive use at home and abroad at present, a large amount of clinical observation discovery cervical artificial disc replacement therapy cervical vertebra condition of disease are obtained promising result.The operative indication of putting due to cervical artificial disc limits to: single segmental or binodal section prolapse of cervical intervertebral disc compressing spinal cord or nerve root, the cervical spinal fusion of other types still cannot be substituted by cervical artificial disc replacement as cervical vertebral body excises decompression and fusion entirely.
In sum, currently available technology can not avoid loss of motor function after the full excision of cervical vertebral body time decompression and fusion drawback and due to the problem accelerated of Adjacent segment degeneration.
For having efficient recovery disc height and corresponding segmentation movement function, delay the generation of Adjacent segment degeneration, avoid implant the problem such as to subside, become flexible simultaneously, we have designed a kind of new anti-dislocation formula artificial cervical and intervertebral disc system.
Summary of the invention
The object of the invention is to overcome the shortcoming of above-mentioned prior art, the non-fusion artificial cervical of a kind of anti-dislocation formula and intervertebral disc system are provided, this system possesses the support function of artificial vertebral body and the non-fusion feature of artificial intervertebral disk simultaneously, between vertebral body and intervertebral disc, realize both anticreep bit functions by special construction, this system can obtain the postoperative vertebral body of anterior approach time and entirely cut the Initial stability after prosthetic replacement, makes its activeness bionical with normal cervical vertebrae height.
The object of the invention is to be achieved through the following technical solutions:
The non-fusion artificial cervical of this anti-dislocation formula and intervertebral disc system, comprise vertebral body parts and be connected in respectively two soleplate parts of vertebral body parts upper and lower side by dome articulation structure and front and back side L-type anticreep bit architecture; On described two soleplate parts, be respectively equipped with soleplate hold-down screw;
Described vertebral body parts top and bottom are provided with circular glenoid fossa, and both ends are provided with annular groove, and before and after both ends, side is provided with arc flat board forward, backward; Described vertebral body parts side is provided with some left and right through hole;
Described dome articulation structure comprises the circular glenoid fossa that the dome articular surface being arranged on soleplate parts and the top and bottom that are arranged on vertebral body parts and described dome articular surface adapt, and this dome articulation structure wraps in dome articular surface in circular glenoid fossa;
Described L-type anticreep bit architecture comprise be arranged on side before and after soleplate parts L-type structure, be arranged on vertebral body ends annular groove, be arranged on the arc flat board of side before and after vertebral body ends, this L-type anticreep bit architecture matches L-type structure with annular groove, the dull and stereotyped restriction of arc L-type structure is moved at the relative vertebral body parts of soleplate parts, prevents that soleplate parts and vertebral body parts from dislocating.
Further, above-mentioned soleplate parts comprise plectane, and below plectane, middle part is provided with cylinder and dome articular surface structure, is provided with broached-tooth design above plectane; The forward and backward side of described plectane bottom is provided with L-type anticreep bit architecture, and the front side on described plectane top is provided with vertical arc plate structure, and described vertical arc plate structure is fixed two pieces of soleplate parts hold-down screws by threaded screw in two; Described soleplate hold-down screw and described plectane are 20 ° of angles.
Further, on the above plectane, there is broached-tooth design; The height of described broached-tooth design is 1mm in center, successively decreases to surrounding.
Further, the surface of the above broached-tooth design is provided with biology hydroxyapatite coating layer, and described hydroxyapatite coating layer thickness is 20 μ m.
Further, to be provided with through the thickness of plasma oxidation technical finesse be the biology hydroxyapatite coating layer of 20 μ m in the left and right side of the above vertebral body parts.
Further, the front end of the above soleplate hold-down screw is tip, and described soleplate hold-down screw rear end is nut, and the nearly nut end of this soleplate hold-down screw is most advanced and sophisticated thicker than near.
The present invention has following beneficial effect:
The present invention can at once bring into play supporting role after cervical vertebral body subtotal ectomy, and by carrying the motor function of the alternative normal cervical vertebra in intervertebral coupling part, stress can disperse cervical vertebra moving time, reduce neighbouring section intervertebral disc and zygapophysial joints internal pressure, effectively prevent the Adjacent segment degeneration due to fusion.In addition, can realize bone by the hydroxyapatite coating layer on bone grafting and native system surface merges and can it stablize.Operating difficulty is less, and wound is little, is convenient to promote.Due to the existence of the anti-roll off device of native system, can obtain postoperative long-term stability.
Accompanying drawing explanation
Fig. 1 is overall structure schematic diagram of the present invention;
Fig. 2 is vertebral body modular construction schematic diagram of the present invention;
Fig. 3 is the top view of Fig. 2;
Fig. 4 is the profile of Fig. 3;
Fig. 5 is soleplate structural representation of the present invention;
Fig. 6 is the top view of Fig. 5;
Fig. 7 is the front view of Fig. 5;
Fig. 8 is the axis side view that waits of Fig. 5;
Wherein: 1 is vertebral body parts; 2 is soleplate parts; 3 is soleplate hold-down screw; 4 is circular groove structure; 5 is arc flat board; 6 is left and right through hole; 7 is circular glenoid fossa; 8 is plectane; 9 is dome articular surface; 10 is L-type anticreep bit architecture; 11 is vertical arc plate structure; 12 is broached-tooth design; 13 is screw.
The specific embodiment
Below in conjunction with accompanying drawing, the present invention is described in further detail:
Referring to Fig. 1, the non-fusion artificial cervical of anti-dislocation formula of the present invention and intervertebral disc system, comprise vertebral body parts 1 and be connected in respectively two soleplate parts 2 of vertebral body parts 1 upper and lower side by dome articulation structure; Be provided with some through holes 6 in vertebral body component side walls; On two soleplate parts 2, be respectively equipped with soleplate parts hold-down screw 3.Be described in detail forming each parts of the present invention below in conjunction with accompanying drawing:
As shown in Figure 1, Figure 2, Figure 3, Figure 4, vertebral body parts 1 are provided with the circular glenoid fossa structure 7 of top and bottom, the circular groove structure 4 at two ends, some left and right through hole structure 6 at middle part.
In most preferred embodiment of the present invention: respectively there is the circular glenoid fossa structure 7 that the degree of depth matching with soleplate parts 2 bottom dome articular surfaces is 2.5mm vertebral body parts 1 top and bottom, three-dimensionally see, this circle glenoid fossa structure is that diameter is lower 2.5/20 part of the spheroid of 20mm, this structure encases soleplate parts 2 bottom dome articular surfaces 9, forms with it dome joint; Respectively there is a circular groove structure 4 at vertebral body parts 1 two ends, and this structure has respectively forward in the forward and backward side in close vertebral body top and bottom, rearwardly projecting arc flat board 5; Vertebral body parts 1 middle part, left and right side is provided with some left and right through hole 6; Left and right side and all through hole inner surfacies are frosted spline structure, and there is hydroxyapatite coating layer on surface, merge to realize good bone, obtain good stability and enabling capabilities.
Referring to Fig. 1, Fig. 5, Fig. 6, the circular glenoid fossa 7 adapting with dome articular surface 9 that the above dome articulation structure comprises the dome articular surface 9 on soleplate parts 2 and is arranged on vertebral body parts 1 end.Dome articular surface 9 cooperatively interacts with circular glenoid fossa 7, realizes the movable function that intervertebral connects all directions.
In most preferred embodiment of the present invention: dome articular surface is connected with the column structure matching by 2/20 of the ball of diameter 20mm.This dome articular surface 9 matches with the circular glenoid fossa 7 of the upper and lower side of vertebral body respectively.Upper and lower circular glenoid fossa 7 is side and dome articular surface 9 fit like a glove (being that diameter is 20mm) all around.Such intervertebral is connected with large-scale contact area, guarantees that this prosthese can play stable supporting role in spinal column axis under stress condition, the friction that can alleviate articular surface simultaneously; This dome articulation structure can be realized the proper motion of vertebral body.Existing artificial vertebral body has support function but does not possess motor function clinically at present, and artificial intervertebral disk motor function is only applicable to the reservation of intervertebral space motion and does not possess support function.Therefore, the intervertebral that forms by the dome joint of unique design connects the support function that can realize artificial vertebral body, can retain again the motor function of intervertebral space, thus slow down because of post-fusion stress increase due to the progress of Adjacent segment degeneration.
As shown in Fig. 5, Fig. 6, Fig. 7, Fig. 8, soleplate parts 2 comprise plectane 8, there is vertical fixing dome articular surface 9 in the lower central of plectane 8, the front and back side of plectane 8 respectively has a L-type anticreep bit architecture, on plectane 8 top, front side arc plate structures 11 straight up, has both direction and plectane 8 interior threaded screw 13 to be at an angle fixed with two soleplate hold-down screws 3; Plectane 8 is provided with broached-tooth design 12 above.
In most preferred embodiment of the present invention: the annular groove 4 of the L-type anticreep bit architecture of soleplate parts 2 and vertebral body parts 1 end, the arc dull and stereotyped 5 of front and back, two ends side form restrictive associations.L-type structure 10 embeds in groove structure 4, and arc slab construction 5 is surrounded by L-type structure 10, while preventing this system soleplate and vertebral body relative motion, dislocates.When after vertebral body parts implantation, needs of patients carries out the exercise of cervical region activeness in early days, but merge because vertebral body parts not yet form stable bone with surrounding tissue, this L-type anticreep bit architecture just can limit because the over-activity of vertebral body parts forms dislocation, avoids the risk of compression of spinal cord.
The line place of keeping to the side in the middle of the arc straight up of the front side of plectane 8 has two in order to the fixing screw 13 of screw, and these two screws 13 are interior threaded, coordinate with soleplate hold-down screw 3.Soleplate parts screw 3 of the present invention is tapping screws, and its rear end is nut, and the near-end nut end of this soleplate hold-down screw 3 is slightly thicker than its nearly tip end.Soleplate hold-down screw 3 can be 20 ° of angular direction with plectane and implant corresponding vertebral body, soleplate hold-down screw 3 matches with interior threaded screw 13, due to the female thread structure of screw 13, coordinate longer soleplate parts screw 3, can obtain larger hold, realize soleplate closely fixing with contiguous vertebral body.
The top of plectane 8 is broached-tooth design 12, height is 1mm in center, and successively decrease to surrounding, more adapt to the anatomic form of the upper and lower soleplate of contiguous vertebral body, can realize contiguous vertebral body and better coordinate, there is the biology hydroxyapatite coating layer that utilizes plasma oxidation technical finesse and form on described broached-tooth design 12 surfaces, coating layer thickness approximately 20 μ m, all upper surface processing, can accelerate the early stage fusion of soleplate structure and contiguous vertebral body, are conducive to realize biologic fusion and long-term stablizing.
In sum, the non-fusion artificial cervical of anti-dislocation formula of the present invention and intervertebral disc system are applicable to the inferior disease of entirely cutting art data of front road cervical vertebral body, for example: adjacent two segment prolapse of cervical intervertebral disc, vertebral tumor, tuberculosis of spine, impaired body of cervical vertebra bursting fracture, the compression fracture etc. of non-function of nervous system.In addition, also can use native system for the other types cervical spondylosis that cervical artificial disc is postoperatively overhauled, the postoperative Adjacent segment degeneration of Cervical Fusion is serious.Below with regard to disc removal, vertebral body time entirely cut, native system replacement illustrates the specific embodiment in operation:
To possessing the conventional preoperative inspection of patient's row of this art formula indication, parallel pass on trachea and esophagus, bed urinate, defecation exercise; Get patient's dorsal position, both shoulders pad is with soft pillow, and head and neck nature is stretched to layback, nape placement sandbag or cork pillow, and rear pillow part pad is with soft head circle, and a both sides little sandbag of each placement prevents from rotating in art; Adopt anterior approach transverse incision, incision length is generally 3～5cm; Accurately determine carotid sheath and neck internal organs sheath, do passivity with first finger along the gap having separated and loosen, then separate and arrive at vertebral body and intervertebral disc front portion to deep gently; With drag hook, by trachea, esophagus tractive to the midline, carotid sheath is tractive slightly to the right, can arrive at vertebral body and intervertebral disc anterior diastema; After mentioning prevertebral fascia with long forceps, successively cut off, then this layer of fascia of longitudinal dissociation, expands gradually and exposes vertebral body and intervertebral space up and down; On sick vertebra, the next vertebral body central authorities are screwed into respectively dilator screw, are inserted in dilator strutting on screw, and two ends strut up and down; Determine the upper and lower intervertebral disc of corresponding vertebral body, cut fibrous ring with sharp knife, nucleus pulposus clamp takes out broken disc tissue; Sting frontal cortex bone and the most of spongy bone except anterior vertebral with three joint rongeurs.While approaching vertebral body trailing edge, suspend, first with curet, intervertebral disc and soleplate are all struck off, isolate the gap between vertebral body trailing edge and posterior longitudinal ligament with nerve dissector, stretch into slim impact type rongeur and progressively cortical bone after vertebral body is stung and removed, now form a rectangular relief groove; Carefully relief groove base is expanded, thoroughly excision causes pressure thing, completes decompression; Assemble in vitro this system, the dome articular surface of upper and lower soleplate parts is put to the circular groove of vertebral body parts upper and lower surface along vertebral body side respectively, and half-twist, make the arc straight up of soleplate parts be positioned at front side, obtained vertebral body sclerotin is bitten into pieces in some bone graftings hole of implanting the perforation of vertebral body parts side; Adjust the height that struts of vertebrae strutting device, make the height of cervical vertebra front pillar recover normal, native system is put to relief groove, and make upper and lower soleplate and contiguous vertebral body be affixed below and above with; Being 20 ° of angles with contiguous vertebral body upper and lower surface respectively implants upper and lower 4 pieces of screws and fixes upper and lower soleplate with contiguous upper hypocentrum; Unclamp vertebrae strutting device, make native system closely chimeric, and under X-ray machine, have an X-rayed errorless afterflush wound, place drain, layer-by-layer suture.Postoperative routine care, postoperative 1 day can normal activity cervical region.
Claims (6)
1. the non-fusion artificial cervical of anti-dislocation formula and intervertebral disc system, it is characterized in that, comprise vertebral body parts (1) and be connected in respectively two soleplate parts (2) of vertebral body parts (1) upper and lower side by dome articulation structure and front and back side L-type anticreep bit architecture; On described two soleplate parts (2), be respectively equipped with soleplate hold-down screw (3);
Described vertebral body parts (1) top and bottom are provided with circular glenoid fossa (7), and both ends are provided with annular groove (4), and before and after both ends, side is provided with arc flat board (5) forward, backward; Described vertebral body parts (1) side is provided with some left and right through holes (6);
Described dome articulation structure comprises the circular glenoid fossa (7) that the dome articular surface (9) being arranged on soleplate parts (2) and the top and bottom that are arranged on vertebral body parts (1) and described dome articular surface (9) adapt, and this dome articulation structure wraps in dome articular surface (9) in circular glenoid fossa (7);
Described L-type anticreep bit architecture comprise be arranged on side before and after soleplate parts (2) L-type structure (10), be arranged on vertebral body parts (1) end annular groove (4), be arranged on the arc flat board (5) of side before and after vertebral body parts (1) end, this L-type anticreep bit architecture matches L-type structure (10) with annular groove (4), arc flat board (5) restriction L-type structure (10) soleplate parts (2) relatively vertebral body parts (1) move, prevent that soleplate parts (2) and vertebral body parts (1) from dislocating.
2. the non-fusion artificial cervical of anti-dislocation formula according to claim 1 and intervertebral disc system, it is characterized in that, soleplate parts (2) comprise plectane (8), and below plectane (8), middle part is provided with cylinder and dome articular surface structure (9), and plectane (8) is provided with broached-tooth design (12) above; The forward and backward side of described plectane (8) bottom is provided with L-type anticreep bit architecture (10), the front side on described plectane (8) top is provided with vertical arc plate structure (11), and described vertical arc plate structure (11) is fixed two pieces of soleplate parts hold-down screws (3) by threaded screw (13) in two; Described soleplate hold-down screw (3) is 20 ° of angles with described plectane (8).
3. the non-fusion artificial cervical of anti-dislocation formula according to claim 2 and intervertebral disc system, is characterized in that, has broached-tooth design (12) on described plectane (8); The height of described broached-tooth design (12) is 1mm in center, successively decreases to surrounding.
4. the non-fusion artificial cervical of anti-dislocation formula according to claim 3 and intervertebral disc system, is characterized in that, the surface of described broached-tooth design (12) is provided with biology hydroxyapatite coating layer, and described hydroxyapatite coating layer thickness is 20 μ m.
5. the non-fusion artificial cervical of anti-dislocation formula according to claim 1 and intervertebral disc system, is characterized in that, it is the biology hydroxyapatite coating layer of 20 μ m that the left and right side of described vertebral body parts (1) is provided with through the thickness of plasma oxidation technical finesse.
6. the non-fusion artificial cervical of anti-dislocation formula according to claim 1 and intervertebral disc system, it is characterized in that, the front end of described soleplate hold-down screw (3) is tip, and described soleplate hold-down screw (3) rear end is nut, and the nearly nut end of this soleplate hold-down screw (3) is most advanced and sophisticated thicker than near.
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