CN218636157U - Movable artifical cervical vertebra of integral type - Google Patents

Abstract

The utility model relates to a movable artifical cervical vertebra of integral type, including a centrum part (1), two movable parts (2) and two imitative end plate parts (3), centrum part (1) upper end is equipped with horizontal type of falling T spout structure (4), the lower extreme is equipped with first horizontal T type spout structure (5), movable part (2) upper end is equipped with horizontal T type and inlays and insert structure (6), the lower extreme is equipped with horizontal type of falling T and inlays and inserts structure (7), imitative end plate part (3) one end is equipped with the horizontal T type spout structure (8) of second, be equipped with circular cone type bur structure (9) on the other end terminal surface, the upper end and the lower extreme of centrum part (1) are connected with one of them movable part (2) respectively, two movable parts (2) are connected with one imitative end plate part (3) respectively. The cervical vertebra auxiliary total resection device can effectively recover the intervertebral space height and the motion function of the corresponding segment after the cervical vertebra secondary total resection, delay the degeneration of the adjacent segment, and simultaneously can avoid the problems of the collapse, the looseness and the like of the implant.

Description

Movable artifical cervical vertebra of integral type

Technical Field

The utility model belongs to the technical field of medical false body, a artifical cervical vertebra is related to, the movable artifical cervical vertebra of concretely relates to integral type.

Background

The cervical secondary total resection and fusion has been widely developed clinically, and the operation is suitable for patients with cervical posterior longitudinal ligament ossification, patients with spinal cervical spondylosis, patients with primary tumor or metastatic tumor of vertebral body, patients with tumor in vertebral canal in front of spinal cord, and the like, wherein the intervertebral disc of continuous two segments is protruded and prolapsed to the back of vertebral body. When the operation is carried out, firstly, the pathological change vertebral body is exposed and the part of the pathological change vertebral body in the bilateral uncinate vertebral joints is cut off, secondly, the upper intervertebral disc, the lower intervertebral disc and other pathological changes causing the compression of the spinal cord are cut off, and finally, bone blocks or titanium cages are implanted into the pressure reduction grooves, and the upper vertebral body and the lower vertebral body are uniformly fixed through a plurality of front fixing screws, so that the structure forms an integral unit, and a stable biomechanical environment is provided for the later recovery of the spinal cord and the nerve function.

Although the cervical vertebrae subtotal resection and fusion has become mature, clinical follow-up shows that the activity of the cervical vertebrae is reduced after patients receive the surgery, degenerative changes of the upper and lower adjacent segments of the fusion segment are accelerated, and the like. The main reason for this is the loss of cervical space activity caused by fusion (Virk SS, niedermeier S, yu E, khan SN. Adjacent segment disease. Orthopedics. Aug 2014, 37 (8): 547-55.

In addition, because the cervical vertebra secondary total resection fusion adopts the autologous bone grafting block or the titanium cage, a great part of postoperative patients have the bone grafting block or the titanium cage to sink, and further the fixing screw is loosened and even broken, thereby causing the operation failure.

Scholars at home and abroad try to avoid serious complications caused by the sinking of the internal implant after the secondary total resection by researching and developing a novel personalized titanium cage. 3D printing personalized artificial cervical vertebra can reconstruct the height of the vertebral body and the effective area contacted with the upper and lower adjacent vertebral bodies is obviously increased (Liyuwei, wanghaojiao, try Wei, li Cheng.A comparative study on treating the fracture of the cervical vertebra by 3D printing the artificial cervical vertebra and titanium mesh implantation internal fixation [ J ]. China trauma orthopedics journal, 2018,20 (8): 705-711), and meanwhile, the personalized 3D printing artificial cervical vertebra also has successful application in effectively reconstructing the intervertebral height and the supporting function of a cervical vertebral body tumor patient (Yang W, jiang L, liu X, et al.

Then, the artificial vertebral body is continuously improved by people, metal materials, novel composite materials and the like with better compatibility with human tissues gradually appear, the fixing mode is developed from the original steel plate or nail rod auxiliary fusion fixing to the current pure self-locking artificial vertebral body implantation fusion fixing, and the surface of the artificial vertebral body is subjected to bioactive material coating treatment so as to achieve the purpose of better fusion with surrounding bony structures. Meanwhile, the early pure supporting type is developed into the expansible fixing type artificial vertebral body, and the height-adjustable artificial vertebral body suitable for different crowds is also provided.

Although the artificial vertebral body has made great progress in individualization, the artificial vertebral body is still limited in cervical fusion from the aspect of the art, and the dilemma of increasing the pressure load and the motion load of adjacent segments after fusion is not overcome. Successful application of artificial cervical intervertebral discs suggests that intervertebral mobility can be effectively preserved by non-fusion implants, which largely solves a series of problems caused by increased activity of adjacent segments after single-gap intervertebral fusion (Parish JM, asher AM, scientific D.adjacencies-Segment Disease followingspinal arthroplasty. Neurosurgery Clinics of North america. Oct2021;32 (4): 505-510). However, the artificial cervical intervertebral disc is only suitable for the operation without influencing the integrity of the vertebral body, and the problem of how to effectively prevent the disintegration of the adjacent segments after the secondary total resection of the cervical vertebra cannot be effectively solved all the time.

In conclusion, the prior art can not avoid the defect of the loss of the motion function after the cervical vertebra sub-total resection decompression fusion and the problem of the accelerated degeneration of the adjacent segments.

Therefore, in order to effectively recover the intervertebral space height and the motion function of the corresponding segment after the secondary total cervical spondylotomy and delay the degeneration of the adjacent segment, and simultaneously avoid the problems of collapse, looseness and the like of the implant, an integrated movable artificial cervical vertebra is urgently needed to be designed.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome the shortcoming that exists among the prior art, provide a movable artifical cervical vertebra of integral type, it can effectively resume intervertebral space height and corresponding festival section motion function, the emergence of delaying neighbouring festival section degeneration of cervical vertebra time total resection back, can avoid the implant to sink simultaneously, not hard up scheduling problem.

In order to achieve the above object, the present invention provides the following technical solutions:

the utility model provides an integral type movable artificial cervical vertebra, its includes a centrum part, two movable parts and two imitative terminal plate parts, its characterized in that, the upper end of centrum part is equipped with horizontal T type spout structure, and the lower extreme is equipped with first horizontal T type spout structure, the upper end of movable part is equipped with horizontal T type and inlays the structure of inserting, and the lower extreme is equipped with horizontal T type and inlays the structure of inserting, the terminal surface that imitative terminal plate part was equipped with second horizontal T type spout structure, the other end is equipped with conical thorn structure, the horizontal T type spout structure of centrum part and the horizontal T type of one of them movable part inlay the structure and form to inlay and insert the connection, first horizontal T type spout structure and the horizontal T type of another movable part and inlay the structure and form to inlay and insert the connection with the horizontal T type spout structure of the second of one imitative terminal plate part, the inverted T type of another movable part inlays the structure and inserts the structure and forms to inlay the connection with the second horizontal T type of another imitative terminal plate part and inserts.

Preferably, the centrum part is a cubic cage-shaped structure, the left side surface and the right side surface of the centrum part are completely communicated, and a plurality of circular hole hollow structures are arranged on the front side surface and the rear side surface of the centrum part.

Preferably, the upper end of the vertebral body component is provided with three parallel-arranged transverse inverted-T-shaped sliding groove structures, and the lower end of the vertebral body component is provided with three parallel-arranged first transverse T-shaped sliding groove structures.

Preferably, the movable component is provided with three parallel transverse T-shaped embedding structures at the upper end and three parallel transverse inverted T-shaped embedding structures at the lower end.

Preferably, one end of the simulated endplate part is provided with three second transverse T-shaped sliding groove structures which are arranged in parallel, and the end face of the other end of the simulated endplate part is provided with three conical spike structures.

Preferably, the three conical spike structures are arranged in an isosceles triangle.

Preferably, the movable component is made of elastic silicone rubber, the vertebral body component and the dummy endplate component are made of metal tantalum, and the surface of the vertebral body component and the dummy endplate component is provided with a hydroxyapatite coating with the thickness of 30 μm.

Preferably, the vertebral body component has a length of 12mm, a width of 12mm and a height of 11mm, the movable component has a length of 12mm, a width of 12mm and a height of 4mm, and the dummy endplate component has a length of 12mm, a width of 12mm and a height of 3mm.

Preferably, the depth of the transverse inverted T-shaped sliding groove structure, the depth of the first transverse T-shaped sliding groove structure and the depth of the second transverse T-shaped sliding groove structure are both 2mm, the length of the transverse T-shaped sliding groove structure is 12mm, and the height of the transverse T-shaped inserting structure and the height of the transverse inverted T-shaped inserting structure are both 2mm and the length of the transverse T-shaped inserting structure are both 12mm.

Preferably, the height of the conical-shaped spike structure is 2mm.

Compared with the prior art, the utility model discloses a movable artifical cervical vertebra of integral type has one or more in following beneficial technological effect:

1. it can form a stable whole through a plurality of inlays and inserts the connection and rebuilds the effective height of cervical vertebra and keep original intervertebral segmental motion function after the inferior total resection of cervical vertebra body to adjacent segmental stress when can reducing the cervical vertebra activity, reduce adjacent segmental intervertebral disc and joint suddenly intra-articular pressure, effectively reduce the load of adjacent intervertebral disc, and then the adjacent segmental degeneration that the fusion technique caused after the inferior total resection of effective prevention.

2. The bone grafting device can realize stable and good osseous fusion through the bone grafting and the hydroxyapatite coating on the surface of the bone grafting and the vertebral body after secondary complete resection.

3. After the operation is adopted, the operation difficulty is small, the wound is small, and the popularization is convenient.

4. Long-term postoperative stability can be achieved due to the presence of its bayonet connection.

Drawings

Fig. 1 is an isometric view of the integrated movable artificial cervical spine of the present invention.

Fig. 2 is a front view of the movable artificial cervical vertebra of the utility model.

Fig. 3 is a schematic side view of the movable artificial cervical vertebra of the present invention.

Fig. 4 is an isometric view of the vertebral body components of the integrated movable artificial cervical spine of the present invention.

Fig. 5 is a front view schematically showing the vertebral body component of the integrated movable artificial cervical vertebra of the present invention.

Fig. 6 is a schematic side view of the vertebral body component of the integrated movable artificial cervical vertebra of the present invention.

Fig. 7 is an isometric view of the movable components of the integrated movable artificial cervical spine of the present invention.

Fig. 8 is a side view of the movable components of the integrated movable artificial cervical spine of the present invention.

Fig. 9 is an isometric view of the simulated endplate components of the integrated movable artificial cervical spine of the present invention.

Fig. 10 is a schematic side view of the simulated endplate components of the integrated movable artificial cervical spine of the present invention.

Fig. 11 is a schematic front view of the simulated end plate component of the integrated movable artificial cervical vertebra of the utility model.

Wherein: 1 is a vertebral body component; 2 is a movable member; 3 is a simulated endplate component; 4, a transverse inverted T-shaped sliding groove structure; 5 is a first transverse T-shaped sliding groove structure; 6 is a transverse T-shaped inserting structure; 7 is a transverse inverted T-shaped inserting structure; 8 is a second transverse T-shaped sliding chute structure; 9 is a cone-shaped spike structure; 10 is a hollow structure with a round hole.

Detailed Description

The present invention is further described with reference to the following drawings and examples, which are not intended to limit the scope of the present invention.

In the present invention, terms indicating orientations, such as "upper", "lower", "left", "right", "front", "rear", and the like, are used for convenience of description in conjunction with the drawings, and are not intended to limit the contents of the present invention.

For effectively resume intervertebral space height and corresponding festival section motion function, the emergence of delaying neighbouring festival section degeneration of cervical vertebra secondary total cut postoperative, avoid the implant to sink simultaneously, not hard up scheduling problem, the utility model provides a movable artifical cervical vertebra of integral type.

As shown in figures 1-3, the integrated movable artificial cervical spine of the present invention comprises a vertebral body component 1, two movable components 2 and two endplate imitating components 3.

As shown in fig. 4-6, the upper end of the vertebral body component 1 is provided with a transverse inverted T-shaped sliding groove structure 4, and the lower end is provided with a first transverse T-shaped sliding groove structure 5.

As shown in fig. 7 and 8, the movable member 2 is provided with a transverse T-shaped insertion structure 6 at the upper end and a transverse inverted T-shaped insertion structure 7 at the lower end.

As shown in fig. 9-11, one end of the simulated endplate member 3 is provided with a second transverse T-shaped sliding groove structure 8, and the end surface of the other end is provided with a conical spike structure 9.

As shown in fig. 1 to 3, the transverse inverted-T chute structure 4 of the vertebral body part 1 forms a plug-in connection with the transverse inverted-T plug-in structure 7 of one of the movable parts 2, and the first transverse T-chute structure 5 forms a plug-in connection with the transverse T-plug-in structure 6 of the other movable part 2. Thereby, it is possible to attach the one movable part 2 to the upper end of the vertebral body part 1 and the other movable part 2 to the lower end of the vertebral body part 1.

At the same time, the transverse T-shaped latching means 6 of the one movable part 2 forms a latching connection with the second transverse T-shaped slotted guide means 8 of the one dummy end plate part 3. The inverted T-shaped latching means 7 of the further movable part 2 forms a latching connection with the second transverse T-shaped slotted guide means 8 of the further dummy end plate part 3. It is thereby possible to connect the one dummy plate component 3 to the upper end of the one movable component 2 and the other dummy plate component 3 to the lower end of the other movable component 2.

Therefore, in the present invention, the vertebral body component 1, the two movable components 2 and the two endplate imitating components 3 can be connected by inserting to form an integrated movable artificial cervical vertebra.

In the present invention, as shown in fig. 4-6, the vertebral body member 1 is a cubic cage-shaped structure, the left and right side surfaces thereof are completely through, and the front and rear side surfaces are provided with a plurality of circular hole hollow structures 10. Thus, autologous bone particles may be implanted within the vertebral body member 1 and made to facilitate bone integration with the body's own bony structure.

And, preferably, the anterior and posterior wall thicknesses of the vertebral body member 1 are both 1mm.

More preferably, the movable member 2 is made of elastic silicone rubber. The vertebral body component 1 and the simulated endplate component 3 are made of metal tantalum, and the surfaces of the vertebral body component and the simulated endplate component are provided with hydroxyapatite coatings with the thickness of 30 mu m. Thereby enabling the movable component 2 to flex, rotate, flex, etc. relative to the vertebral body component 1 and the simulated endplate component 3.

The utility model discloses in, because the surface and the internal surface of centrum part 1 all are equipped with the better hydroxyapatite coating of biocompatibility, like this, after implanting the human body, make can form good osseointegration between centrum part 1's interface and the bony structure, thereby make centrum part 1 forms stable structure with the cervical vertebra body of once excising the remainder entirely, and then obtains good biomechanics stability.

Furthermore, in the present invention, the three conical spike structures 9 are arranged in an isosceles triangle. Preferably, the height of the conical-shaped spike structure 9 is 2mm.

Wherein, after implanting, imitate on the end plate part 3 conical thorn structure 9 is inconsistent with the end plate of adjacent centrum from top to bottom, and after vertical extrusion conical thorn structure 9 pricks into about closing on in the centrum, makes the utility model discloses a movable artificial cervical vertebra can be in the decompression inslot after once cutting completely at the time of crooking and stretching, the side is bent, rotatory stable existence.

Preferably, the vertebral body member 1 is 12mm long, 12mm wide and 11mm high. The movable member 2 had a length of 12mm, a width of 12mm and a height of 4mm. The length of the simulated endplate part 3 is 12mm, the width is 12mm, and the height is 3mm. The size of the movable artificial cervical vertebrae are such that the movable artificial cervical vertebrae formed by the inserted connection can be well implanted into the square decompression groove of the patient who has cervical vertebrae subtotal resection.

Furthermore, in the present invention, preferably, the upper end of the vertebral body component 1 is provided with three parallel arrangements of the transverse inverted T-shaped sliding groove structure 4, and the lower end is provided with three parallel arrangements of the first transverse T-shaped sliding groove structure 5.

The movable member 2 has three parallel T-shaped fitting structures 6 at the upper end thereof and three parallel inverted T-shaped fitting structures 7 at the lower end thereof.

Moreover, one end of the end plate imitating component 3 is provided with three second transverse T-shaped sliding groove structures 8 which are arranged in parallel, and the end face of the other end is provided with three conical spike structures 9.

Thereby, a stronger connection between the vertebral body component 1 and the movable component 2 and a stronger connection between the movable component and the dummy plate component 3 is achieved.

More preferably, the depth of the transverse inverted T-shaped sliding groove structure 4, the first transverse T-shaped sliding groove structure 5 and the second transverse T-shaped sliding groove structure 8 is 2mm, the length of the transverse inverted T-shaped sliding groove structure is 12mm, and the interval between the adjacent transverse inverted T-shaped sliding groove structure 4, the adjacent transverse T-shaped sliding groove structure 5 and the adjacent transverse T-shaped sliding groove structure 8 is 1mm.

Moreover, the height of the transverse T-shaped embedding structure 6 and the transverse inverted T-shaped embedding structure 7 is 2mm, the length of the transverse T-shaped embedding structure is 12mm, and the transverse T-shaped embedding structure 6 and the transverse inverted T-shaped embedding structure 7 are adjacent, and the interval between the transverse T-shaped embedding structure 6 and the transverse inverted T-shaped embedding structure 7 is 1mm.

The sizes enable the vertebral body component 1 and the movable component 2 and the movable component and the dummy plate component 3 to be mutually embedded to form more stable embedded connection.

The utility model discloses a movable artifical cervical vertebra of integral type passes through the supporting function of cervical vertebra can effectively be rebuild to the matched stack of centrum part 1, movable part 2 and imitative endplate part 3 after the cervical vertebra is complete excision entirely. And the movable component 2 can keep the mobility of the corresponding intervertebral space through self deformation in the processes of flexion, extension, rotation and lateral bending of the cervical vertebra. Meanwhile, the function of intervertebral motion is kept through the self deformation of the movable part 2, so that the design of the ball-and-socket joint of the existing movable artificial cervical vertebra is completely avoided, and a series of problems of friction interface, surface treatment and the like caused by the ball-and-socket joint are avoided. Therefore, the movable artificial cervical vertebra of integral type of the utility model has the characteristics of recovering the physiological function of the original cervical vertebra, and has the advantages of reducing the pressure in the intervertebral disc of the adjacent segment and delaying the degeneration of the adjacent segment.

The utility model discloses a movable artifical cervical vertebra of integral type is applicable to the case that the anterior cervical way centrum was once cut entirely, for example: patients with cervical posterior longitudinal ligament ossification, patients with myelocervical spondylosis with continuous double-segment intervertebral disc protrusion and prolapse to the back of the vertebral body, patients with primary tumor or metastatic tumor of the vertebral body, patients with intraductal tumor in front of the spinal cord, and the like. In addition, other types of cervical vertebra diseases which cause serious degeneration of adjacent segments after the first-stage cervical vertebra fusion can also be used.

The following description of the embodiments of the present system for discectomy, corpectomy and total body replacement is provided as follows:

1. the patient who is about to do cervical vertebra sub-total resection is examined with preoperative blood routine, urine routine, feces routine, liver and kidney function, electrolyte, blood coagulation, electrocardiogram and the like, and the contraindication of the operation is eliminated.

2. After the patient is satisfied with the static inhalation and general anesthesia, the patient is in the supine position, the shoulders are raised, the neck is tilted backwards, and the soft gasket is placed on the occiput.

3. Adopting a longitudinal incision or a transverse incision in front of the neck, wherein the incision length is about 5cm; and blunt separation is carried out by the index finger in the gap between the carotid sheath and the trachea and esophagus until reaching the bone surface; the incision is then further completed with a retractor after the anterior fascia incision to expose the operative field.

4. After the diseased centrum is determined under the fluoroscopy machine, the centrum distraction nails are implanted in the adjacent upper and lower centrum, and the distracter is sleeved into the upper and lower distraction nails to distract the centrum towards the upper and lower ends.

5. After the position of the upper intervertebral space and the lower intervertebral space is determined, the annulus fibrosus is carefully incised by using a sharp knife, and the intervertebral disc tissue is gradually and completely removed by using nucleus pulposus forceps and a nerve stripper; and gradually biting and removing the pathological vertebral body by using rongeur to directly reach the posterior longitudinal ligament, performing incision on the posterior longitudinal ligament by using a sharp knife in cooperation with a nerve dissector, and gradually and completely biting the posterior longitudinal ligament by using vertebral plate rongeur to realize complete decompression on the spinal cord so as to finally form a square decompression groove with the depth of 13mm, the width of 12mm and the height of 28 mm.

6. And polishing the upper and lower vertebral end plates in the pressure reduction groove by using a grinding drill to enable the upper and lower vertebral end plates to be smooth, and finally stabilizing the height of the pressure reduction groove to be 30-32mm.

7. Two imitated end plate components 3, two movable components 2 and a vertebral body component 1 are assembled into an integrated movable artificial cervical vertebra in vitro according to the mode of figures 1-3, and the bitten vertebral body bone tissue or the iliac blocks taken from the body are bitten and crushed into particles and implanted into the vertebral body component 1.

8. And further expanding the upper and lower vertebral bodies, and implanting the integrated movable artificial cervical vertebra into the pressure reduction groove.

9. Observing under the perspective machine after loosening the upper and lower distraction screws, the utility model discloses a satisfactory back flushing wound of position of movable artificial cervical vertebra of integral type places the drainage, and the successive layer sews up subcutaneous fascia cutaneous tissue.

10. Routine postoperative care, 3 days after operation, the patient can go down the bed and move the neck normally.

Therefore, after the integrated movable artificial cervical vertebra is adopted, the operation difficulty is smaller, the wound is small, and the popularization is convenient.

The above embodiments of the present invention are merely examples for clearly illustrating the present invention and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. It is not exhaustive here for all embodiments. All obvious changes or variations led out by the technical scheme of the utility model are still in the protection scope of the utility model.

Claims (10)

1. The utility model provides a movable artifical cervical vertebra of integral type, its includes a centrum part (1), two movable parts (2) and two imitative terminal plate parts (3), its characterized in that, the upper end of centrum part (1) is equipped with horizontal type of falling T spout structure (4), the lower extreme is equipped with first horizontal type of T spout structure (5), the upper end of movable part (2) is equipped with horizontal T type and inlays and insert structure (6), the lower extreme is equipped with horizontal type of falling T and inlays and insert structure (7), the one end of imitative terminal plate part (3) is equipped with the horizontal type of T spout structure (8) of second, is equipped with conical type spinous process structure (9) on the terminal surface of the other end, the horizontal type of falling T spout structure (4) of centrum part (1) and the horizontal type of falling T type of movable part (2) inlay and insert structure (7) and form to inlay and insert structure (6) and insert and be connected, first horizontal type of T type of movable part (5) and another movable part (2) inlay and insert structure (6) and form to inlay and insert and be connected, the horizontal type of the horizontal T type of movable part (2) inlay terminal plate (6) and insert structure (3) and form to inlay another movable part (3) and insert structure and inlay another horizontal type of movable part (8) and insert the imitative terminal plate part and insert structure and insert the horizontal type of movable part (2) and insert structure and insert the horizontal type of movable part (8) and insert structure and inlay the imitative terminal plate (8) and insert the movable part (2) and insert the horizontal type of movable part (2) and insert the movable part (8) and be connected.

2. The integrated movable artificial cervical vertebra according to claim 1, wherein the vertebral body part (1) is a cubic cage-like structure with the left and right sides completely through, and the front and rear sides are provided with a plurality of round hole hollowed-out structures (10).

3. The integrated movable artificial cervical vertebra according to claim 2, characterized in that the upper end of the vertebral body component (1) is provided with three parallel arranged transverse inverted T-shaped chute structures (4), and the lower end is provided with three parallel arranged first transverse T-shaped chute structures (5).

4. The integrated movable artificial cervical vertebra according to claim 3, wherein the movable part (2) is provided with three parallel arranged transverse T-shaped embedding structures (6) at the upper end and three parallel arranged transverse inverted T-shaped embedding structures (7) at the lower end.

5. The integrated movable artificial cervical vertebra according to claim 4, wherein one end of the simulated endplate component (3) is provided with three second transverse T-shaped sliding groove structures (8) which are arranged in parallel, and the end surface of the other end is provided with three conical spike structures (9).

6. The integrated movable artificial cervical vertebra according to claim 5, characterized in that said three conical spinous structures (9) are arranged in an isosceles triangle.

7. An integrated movable artificial cervical vertebra according to any of claims 1-6, characterized in that the movable part (2) is made of elastic silicone rubber, the vertebral body part (1) and the dummy endplate part (3) are made of metallic tantalum and their surface is provided with a hydroxyapatite coating with a thickness of 30 μm.

8. The integrated movable artificial cervical vertebra according to claim 7, wherein the vertebral body component (1) has a length of 12mm, a width of 12mm and a height of 11mm, the movable component (2) has a length of 12mm, a width of 12mm and a height of 4mm, and the endplate imitating component (3) has a length of 12mm, a width of 12mm and a height of 3mm.

9. The integrated movable artificial cervical vertebra according to claim 8, wherein the depth of the transverse inverted T-shaped sliding groove structure (4), the depth of the first transverse T-shaped sliding groove structure (5) and the depth of the second transverse T-shaped sliding groove structure (8) are 2mm, the length of the transverse T-shaped sliding groove structure is 12mm, and the height of the transverse T-shaped inserting structure (6) and the length of the transverse inverted T-shaped inserting structure (7) are 2mm and the length of the transverse T-shaped inserting structure is 12mm.

10. The integrated movable artificial cervical vertebra according to claim 9, wherein the height of the conical-type spinous process structure (9) is 2mm.

Images