CN209899671U - Self-fixing artificial vertebral body for anterior cervical approach - Google Patents

Abstract

The utility model discloses a self-fixing artificial centrum for anterior cervical approach, belonging to the technical field of medical prosthesis manufacture. The self-fixing device is composed of an integrated cone component and is mainly characterized by comprising an upper end cambered surface, a lower end inclined surface, an end surface sawtooth structure, an end surface micropore structure, a side wall diamond hole, a rear wall micropore structure, a front wall cambered surface structure, a rear wall cambered surface structure and a self-fixing screw hole structure of the front wall. The utility model discloses under the prerequisite that remains postoperative backbone segment stability, having got rid of the use of traditional anterior cervical way titanium board, should break through and effectively reduced the complexity of anterior cervical vertebra centrum secondary excision fusion art, shortened the operating time, reduced the amount of bleeding in the book, optimized the biomechanics conduction mode of anterior cervical way implantation apparatus, avoided a plurality of complications that anterior cervical way steel sheet leads to. Through the utility model discloses above design utility model, this anterior cervical way is from fixing artifical centrum and can effectively reduce a great deal of complication of traditional titanium cage, improves anterior cervical way centrum and amputates the prognosis that fuses the postoperative patient entirely.

Description

Self-fixing artificial vertebral body for anterior cervical approach

[ technical field ] A method for producing a semiconductor device

The utility model belongs to the technical field of medical false body manufacturing, a carry out false body transplantation after cervical vertebra centrum and adjacent intervertebral disc pathological change excision is related to.

[ background of the invention ]

With the improvement of the living standard and the change of the living style of modern people, the incidence of cervical spondylosis is gradually increased. Neck pain has become one of the main causes of clinical visits, and the number of patients visiting cervical spine problems accounts for 1.5% of all diseases. The anterior cervical vertebral body secondary total resection fusion is one of the most common surgical methods for treating cervical spondylosis, and is widely applied to cervical degenerative disease, trauma, tumor and other diseases.

At present, the most common instrument in the anterior cervical vertebral body secondary total resection fusion is a titanium cage combined with an anterior cervical steel plate, and the method is proved to provide sufficient stability for reconstructing cervical vertebral segments after operation, thereby promoting fusion, preventing the titanium cage from shifting or collapsing and being widely adopted by spinal surgeons. However, this method still has a number of disadvantages: the installation of the anterior steel plate makes the operation form become complicated, prolongs the operation time and increases the amount of bleeding; the compression of the anterior steel plate on the adjacent tissues can cause the injury of the esophagus and the trachea, dysphagia and accelerate the degenerative change of the adjacent segments; the traditional titanium cage is a simple cylindrical structure, the two ends of the traditional titanium cage are trimmed by relying on experience of an operator in the operation, the end face of the trimmed titanium cage cannot be attached to an end plate, sharp protrusions exist in small contact areas, and finally the end plate structure is damaged, so that the titanium cage sinks, and the stability of postoperative cervical vertebrae is damaged. The complications can seriously affect the postoperative rehabilitation and life safety of patients and need to be solved urgently.

At present, no effective and simple method or technique for solving the problems caused by the steel plate for the anterior cervical spine exists.

[ Utility model ] content

The utility model aims to solve the defects of the traditional titanium cage titanium plate and provide a self-fixing artificial cervical vertebra with simple structure and adaptive anatomical form.

In order to achieve the above purpose, the utility model adopts the following technical scheme to realize:

an artificial vertebra body capable of self-fixing in the anterior cervical approach comprises a hollow vertebra body part, wherein the upper end, the front wall, the rear wall, the front side angle and the rear side wall of the vertebra body part are all arc surface structures, and the lower end of the vertebra body part is not provided with an inclined surface structure; the upper end surface and the lower end surface of the vertebral body part are both provided with sawteeth, and the top ends of the two side walls and the rear wall of the upper end surface and the lower end surface are both provided with microporous structures; the side wall of the vertebral body component is provided with a diamond window hole, and the front wall is provided with a screw hole for self-fixing.

The utility model discloses further improvement lies in:

the cone component is an integrated structure formed by 3D printing of titanium alloy and is fixedly installed through screws; the thicknesses of the front wall, the rear wall, the left side wall and the right side wall of the vertebral body part are both 2mm, the left diameter and the right diameter are both 13-16 mm, and the front diameter and the rear diameter are both 12 mm.

The centrum part is a square with four corners in cross section and arc angles at the front and the back, the radian radius of the front wall is 15mm, the radian radius of the back wall is 33mm, the radian radii of the front two sides are 2mm, and the radian radii of the back two sides are 3 mm;

the front wall and the rear wall of the vertebral body component are respectively provided with a radian protruding forwards, and the radians are matched with the front radians and the rear radians of the second completely removed vertebral body, so that the front end of the implanted vertebral body component cannot exceed the connecting line of the front wall and the rear wall of the upper vertebral body and the lower vertebral body, and the front tissue structure and the rear tissue structure of the cervical vertebra cannot be pressed; fillets for preventing stress concentration are formed at the junctions of the front side wall, the rear side wall, the left side wall and the right side wall of the vertebral body component; the upper end and the lower end of the vertebral body component are both opened, and a containing cavity for implanting the bone graft is reserved in the vertebral body component.

The anterior wall of the vertebral body member is provided with four screw holes.

The four screw holes are symmetrically arranged up and down, the screw holes on two sides of the central axis are distributed by taking the central axis as a symmetrical line, and included angles between all the screw holes and the cross section surface are consistent and are all 40 degrees +/-10 degrees; the diameters of the main body parts of the four screw holes are all 3.5-4 mm; the four screw holes are all arranged as countersunk holes and are provided with threads, and the screws and the vertebral body component are self-locked; the diameters of the nut parts of the four screw holes are all 5mm, and the heights of the nut parts are 1 mm; and a wrapping structure with the thickness of 1mm is arranged around the four screw holes.

The rear wall of the cone component is embedded with a layer of cellular micropore structure, the cellular micropore structure is formed by a rhombohedral hexahedral unit cell array, the size is 1 multiplied by 8 multiplied by 13.5mm, the aperture size is 400 mu m, and the porosity is about 65%; all the holes in the cellular micropore structure are communicated with each other, so that blood vessels and soft tissues can grow in.

The upper end of the vertebral body part is of an arc surface structure, the arc surface structure is arranged on an inclined plane forming an included angle of 9 degrees with the cross section, and the radian radius of the arc surface on the sagittal plane is 10-18 degrees.

The lower end of the vertebral body component is of an inclined plane structure and forms an angle of 10-15 degrees with the cross section.

The sawtooth includes upper end sawtooth structure and lower extreme sawtooth structure, and the degree of depth of sawtooth is 0.7 ~ 1.0 mm.

The microporous structure includes an upper end microporous structure and a lower end microporous structure.

The diamond window hole is composed of a plurality of diamond holes, and the area of the diamond holes accounts for more than 50% of the total area of the side wall of the vertebral body part.

Compared with the prior art, the utility model discloses following beneficial effect has:

the utility model discloses the anatomical feature of cervical vertebra is combined from fixed artificial centrum to the anterior cervical way, and upper and lower adjacent centrum endplate is hugged closely to upper end cambered surface and lower extreme inclined plane, satisfies anatomical form adaptation. The zigzag structure increases the friction between the vertebral body and the end plate and effectively prevents the vertebral body from shifting. The microporous structures on the upper end surface and the lower end surface increase the contact area with the end plates to prevent sinking, provide bone ingrowth space and promote early stability. The side wall is provided with large diamond holes, which is beneficial to promoting bone fusion. Screw holes are arranged on the front wall, and allow the vertebral body to be self-fixed through the screws.

Further, the utility model discloses the screw that the centrum antetheca set up makes the art person can be with screw with artifical centrum snap-on in end plate from top to bottom, and no longer need additionally use anterior cervical way steel sheet to avoid the anterior cervical way steel sheet to lead to a great deal of complication, and can provide sufficient postoperative stability for the segment section of rebuilding. Meanwhile, the fixing mode changes the force supporting mode of the traditional titanium cage titanium plate and mainly takes a force transmission mode as a main mode, so that the stress of a screw-vertebral body interface can be effectively reduced, the loosening probability of screws is reduced, the stress of transplanted bones is properly increased, the generation of bones is promoted, and the fusion is promoted.

Further, the utility model discloses the shared lateral wall proportion in rhombus hole of centrum lateral wall is big, and these large tracts of land rhombus holes are favorable to the internal bone grafting of vertebra and the remaining bony part of inferior full cutting centrum to fully contact, guarantee around the centrum inside the blood supply gets into artifical centrum, sufficient blood supply and good bony contact are the important prerequisite that bone growth fuses, and this design can effectively improve postoperative fusion rate and fuse speed.

Further, the utility model discloses the upper end cambered surface and the bottom inclined plane structure of centrum form through the anatomical structure data design of terminal plate about gathering normal people cervical vertebra centrum, and this design makes the last lower extreme and the adjacent centrum terminal plate of artifical centrum closely laminate to increased area of contact, prevented the emergence of the stress concentration phenomenon that traditional titanium cage extensively exists, can effectively reduce the centrum and sink the probability of emergence.

Further, the utility model discloses sawtooth structure of lower extreme has increased the frictional force between terminal surface and the end plate about the artificial centrum, and the artificial vertebra that has significantly reduced is like the possibility that shifts, deviate from before or after to reduced cervical vertebra the place ahead structure like esophagus, trachea, rear structure like the impaired possibility of spinal cord.

Further, the utility model discloses the cellular structure of lower extreme forms according to mechanical analysis structural design on the centrum, and this cellular structure can greatly increase the area of contact of centrum terminal surface and end plate under the prerequisite of guaranteeing centrum intensity, has reduced the actual elastic modulus of artifical centrum, for bone tissue grows into and provides the space, has reduced stress and has sheltered from, promotes the integration of bone-artifical centrum, increases postoperative cervical vertebra structural stability.

Further, the utility model discloses microporous structure on the wall provides the attachment point for the adhesion of rear soft tissue, has increased the stability of the early artifical centrum of postoperative.

[ description of the drawings ]

FIG. 1 is a front isometric view;

FIG. 2 is a rear isometric view;

FIG. 3 is a front view;

FIG. 4 is a rear view;

FIG. 5 is a top view;

fig. 6 is a schematic view of the self-fixing cervical vertebra artificial vertebral body book.

Wherein: 1-a vertebral body component; 4-front wall cambered surface structure; 5-rear wall arc surface structure; 6-front side angle cambered surface structure; 7-rear side wall cambered surface structure; 8 a-upper end sawtooth structure; 8 b-a lower end sawtooth structure; 9 a-upper end microporous structure; 9 b-lower end microporous structure; 10-rear wall microporous structure; 11-diamond fenestrations; 12-screw hole.

[ detailed description ] embodiments

In order to make the technical solution of the present invention better understood, the technical solution of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts shall belong to the protection scope of the present invention.

It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

The present invention will be described in further detail with reference to the accompanying drawings:

referring to fig. 1, fig. 2 and fig. 3, the utility model discloses a way artificial centrum of neck self-fixing, the centrum part 1 and the screw that the integrated structure that forms are printed by titanium alloy 3D constitute, centrum part 1 includes upper end arc structure, lower extreme inclined plane structure, antetheca arc structure 4, back wall arc structure 5, place ahead side angle arc structure 6, rear side wall arc structure 7, upper end sawtooth structure 8a, lower extreme sawtooth structure 8b, upper end micropore structure 9a, lower extreme micropore structure 9b, back wall micropore structure 10, the self-fixing of lateral wall rhombus fenestra 11 and antetheca is with screw 12.

The thickness of the front and back wall, the left and right side walls of the vertebral body component 1 is 2mm, so that the contact area of the end face of the vertebral body component 1 and the end plates is increased, and enough supporting strength is provided. The left diameter and the right diameter of the vertebral body component 1 are 13-16 mm, so that the resection amount of the surgical vertebral body is reduced as much as possible on the premise of thorough decompression of a vertebral canal, the bony structure is reserved as much as possible, and postoperative fusion is facilitated. The anterior-posterior diameter of the vertebral body component 1 is 12mm and is matched with the anterior-posterior diameter of the cervical vertebral body of a human body. The front wall and the back wall of the vertebral body component 1 are respectively provided with a radian protruding forwards, and the radian is matched with the front radian and the back radian of a secondary completely-removed vertebral body, so that the front end of the implanted vertebral body component 1 cannot exceed the connecting line of the front wall and the back wall of the upper vertebral body and the lower vertebral body, and the front tissue structure and the back tissue structure of the cervical vertebra cannot be pressed. The junction of the front and rear and left and right side walls of the vertebral body member 1 is rounded to prevent stress concentration caused by too sharp a junction angle. Enough opening area is reserved at the upper end and the lower end of the vertebral body part 1, and a containing cavity with enough volume is reserved in the vertebral body, so that the implantation of bone graft is facilitated.

The anterior wall of the vertebral body member 1 is provided with four screw holes 12, two at each of the upper and lower ends. Screw holes on two sides of the central axis are distributed by taking the central axis as a symmetrical line, and included angles between all the screw holes and the cross section surface are consistent and are all 40 degrees +/-10 degrees. The angle is designed by combining with the anatomy structure of the cervical vertebra of a normal person, so that the screw can be smoothly implanted into the vertebra through the upper end plate and the lower end plate through the screw hole, and the screw cannot penetrate out of the cortex on the opposite side of the vertebra under the condition that the screw with the universal length is used. The diameters of the main body parts of all the screw holes 12 are 3.5-4 mm, the size not only allows the use of a cortical nail with a larger diameter to ensure the fixing strength, but also can keep enough thickness of the side wall of the screw hole on the vertebral body component 1 with a smaller relative size to ensure the supporting strength of the vertebral body component 1. All screw holes 12 are countersunk and provided with threads to allow the screw to self-lock with the vertebral body member 1, ensuring stability of the implanted member. The diameter of the nut part of the screw hole 12 is 5mm, the height is 1mm, and the part is arranged below the front wall of the vertebral body part 1, so that the top end of the nut is completely sunk into the nut part of the screw hole after the screw is screwed in, and does not protrude out of the front wall of the vertebral body part 1, the structural definition of zero incisura is completely realized, and the compression and the damage to the front structure of the cervical vertebra are prevented. And a wrapping structure with the thickness of 1mm is arranged around the screw hole 12, so that the stability and the integrity of the structure of the screw hole 12 are ensured.

The back wall of the vertebral body component 1 is embedded with a layer of cellular micropore structure 10, the structure is formed by a rhombohedral hexahedral unit cell array, the aperture size is 400 mu m, the porosity is about 65%, all holes in the structure are mutually communicated, the ingrowth of blood vessels and soft tissues is allowed, the stability of the artificial vertebral body can be improved after the soft tissues are infiltrated, and even if no fusion or false joints occur, the vertebral body can not be completely dissociated and fall off to damage spinal cords and anterior tissue structures in the vertebral tube.

The upper end of the vertebral body component 1 is of an arc surface structure, the arc surface structure 2 is established on an inclined plane forming an included angle of 9 degrees with the cross section, and the radian radius of the arc surface on the sagittal plane is 10-18 degrees. The end face of the traditional titanium cage is a sharp bulge, and the contact between the end face and an end plate is not considered, so that the titanium cage sinks. The utility model discloses a sagittal plane cambered surface structure makes the terminal surface of artifical centrum agree with closely with the endplate, has greatly increased area of contact, has reduced sunken incidence. The lower end of the vertebral body component 1 is an inclined plane structure 3, and an angle of 10-15 degrees is formed between the lower end and the cross section. The inclined surface increases the contact area between the lower end surface of the vertebral body component 1 and the end plate and reduces the sinking incidence.

Sawteeth are designed on the upper end surface and the lower end surface of the vertebral body component 1, and the depth of the sawteeth is about 0.7-1.0 mm. The sawteeth can effectively increase the friction between the upper end surface and the lower end surface of the vertebral body component 1 and the end plate, and prevent the vertebral body component 1 from generating accumulative small slippage in the movement process of cervical vertebra to induce the dislocation of the vertebral body component 1.

The top ends of the two side walls and the back wall of the upper end surface and the lower end surface of the vertebral body part 1 are provided with micropore structures. According to finite element mechanics analysis, the microporous structure is arranged in the region with the minimum stress of the vertebral body component 1, under the condition of ensuring the strength of the vertebral body component 1, an elastic modulus adaptation region and a bone growing space are provided for the fusion of bones and the vertebral body component, the fusion is facilitated, the appearance of dislocation of a false joint and the vertebral body component is prevented, and the stability of the cervical vertebra after the operation is improved.

The side wall of the vertebral body component 1 is a diamond window hole 11 structure, the size of the diamond hole structure is not strictly limited, but on the premise of ensuring the strength of the vertebral body component 1, the area of the diamond hole is more than 50% of the total area of the side wall of the vertebral body component 1, so that sufficient blood supply of the transplanted bone and contact with the surrounding bony tissues are effectively ensured to promote the growth and fusion of the bone.

The utility model discloses a way is from fixed artificial centrum before the neck, when using:

accomplish the complete excision of pathological change centrum, the adjacent endplate is handled from top to bottom, struts upper and lower centrum with the spreader, and the autogenous bone that will excise or the xenogeneic bone that is prepared fill centrum part 1 inside from the upper and lower end opening of centrum part 1, hold centrum part 1 with the hemostatic forceps and put into the centrum position of excision, slowly loosen the spreader, adjust centrum part 1 until putting to correct position: x-ray during operation shows that the upper end cambered surface sawtooth structure 9a of the vertebral body component 1 is completely attached to the upper end plate, the lower end inclined surface sawtooth structure 9b of the vertebral body component 1 is completely attached to the lower end plate, and the front wall of the vertebral body component 1 does not exceed the connecting line of the upper and lower adjacent front walls of the vertebral body. And (3) loosening the spreader, drilling holes in the directions of the four screw holes 12 on the front wall of the vertebral body component 1 by using a medical bone drill, and then screwing four screws with the diameters of 3.5mm in the drilling direction to ensure that the top end surfaces of the screws do not exceed the front wall of the vertebral body component 1, and checking whether the positions of the screws are accurate or not by X-ray. Then the subsequent routine operation after the anterior cervical vertebral body total resection fusion is completed.

The utility model discloses still have the advantage:

the utility model discloses under the prerequisite that remains postoperative backbone segment stability, having got rid of the use of traditional anterior cervical way titanium board, should break through and effectively reduced the complexity of anterior cervical vertebra centrum secondary excision fusion art, shortened the operating time, reduced the amount of bleeding in the book, optimized the biomechanics conduction mode of anterior cervical way implantation apparatus, avoided a plurality of complications that anterior cervical way steel sheet leads to. The utility model discloses greatly optimized the anatomy form of artificial centrum upper and lower terminal surface, made its and adjacent endplate anatomy form adaptation more. The anatomical adaptation optimization increases the contact area between the artificial vertebral body and the end plate, thereby effectively reducing the stress concentration of the end plate and avoiding the structural damage of the end plate and the consequent subsidence of the artificial vertebral body caused by overlarge stress. The utility model discloses combine together the advantage of 3D printing technique microporous structure and traditional titanium cage, artifical centrum lateral wall still opens the macropore, has remain traditional titanium cage titanium net transplant bone and the abundant contact of inferior resection centrum remaining bony part, is favorable to accelerating the bony fusion. The 3D printing microporous structure is used on the end face of the artificial vertebral body, so that the local elastic modulus of the artificial vertebral body is improved, and the fusion of the artificial vertebral body and the bone is promoted. Through the utility model discloses above design utility model, this anterior cervical way is from fixing artifical centrum and can effectively reduce a great deal of complication of traditional titanium cage, improves anterior cervical way centrum and amputates the prognosis that fuses the postoperative patient entirely.

The above contents are only for explaining the technical idea of the present invention, and the protection scope of the present invention cannot be limited thereby, and any modification made on the basis of the technical solution according to the technical idea of the present invention all fall within the protection scope of the claims of the present invention.

Claims (10)

1. The artificial vertebra body capable of self-fixing in the anterior cervical path is characterized by comprising a hollow vertebra body part (1), wherein the upper end, the front wall, the rear wall, the front side angle and the rear side wall of the vertebra body part (1) are all arc-surface structures, and the lower end of the vertebra body part is not provided with an inclined surface structure; the upper end surface and the lower end surface of the vertebral body component (1) are both provided with sawteeth, and the top ends of the two side walls and the rear wall of the upper end surface and the lower end surface are both provided with microporous structures; the side wall of the vertebral body component (1) is provided with a diamond window hole (11), and the front wall is provided with a screw hole (12) for self-fixing.

2. The anterior cervical self-fixing artificial vertebral body according to claim 1, wherein the vertebral body component (1) is an integrated structure formed by 3D printing of titanium alloy and is fixedly installed through screws; the thickness of the front and back wall and the left and right side walls of the vertebral body component (1) is 2mm, the left and right diameters are 13-16 mm, and the front and back diameters are 12 mm.

3. The self-fixing artificial vertebral body for the anterior cervical approach according to claim 1 or 2, characterized in that the vertebral body part (1) is a square with four corners and arc angles at the front and back, the front wall arc radius is 15mm, the back wall arc radius is 33mm, the front two side angle arc radius is 2mm, the back two side angle arc radius is 3 mm;

the front wall and the rear wall of the vertebral body component (1) are respectively provided with a radian protruding forwards, and the radian is matched with the front radian and the rear radian of a secondary completely-cut vertebral body, so that the front end of the implanted vertebral body component (1) cannot exceed a connecting line of the front wall and the rear wall of the upper vertebral body and the lower vertebral body, and the front tissue structure and the rear tissue structure of the cervical vertebra cannot be pressed; fillets for preventing stress concentration are formed at the junctions of the front side wall, the rear side wall, the left side wall and the right side wall of the vertebral body component (1); the upper end and the lower end of the vertebral body component (1) are both opened, and a containing cavity for transplanting bone is reserved in the vertebral body component.

4. An anterior cervical self-fixating artificial vertebral body according to claim 1 or 2, characterized in that the anterior wall of the vertebral body part (1) is provided with four screw holes (12).

5. The cervical anterior self-fixating artificial vertebral body according to claim 4, wherein four screw holes (12) are arranged vertically symmetrically, the screw holes on both sides of the central axis are distributed with the central axis as a symmetry line, and the included angles of all the screw holes and the cross-sectional surface are consistent and are all 40 ° ± 10 °; the diameters of the main body parts of the four screw holes (12) are all 3.5-4 mm; the four screw holes (12) are all arranged as countersunk holes and are provided with threads, and the screws are self-locked with the vertebral body component (1); the diameters of the nut parts of the four screw holes (12) are all 5mm, and the heights of the nut parts are 1 mm; and a wrapping structure with the thickness of 1mm is arranged around the four screw holes (12).

6. The cervical self-anchoring artificial vertebral body according to claim 1 or 2, characterized in that the posterior wall of the vertebral body part (1) is embedded with a layer of cellular structure (10), the cellular structure (10) being formed by an array of rhombohedral unit cells having dimensions of 1 x 8 x 13.5mm, a pore size of 400 μm and a porosity of about 65%; all the holes in the honeycomb microporous structure (10) are communicated with each other, so that blood vessels and soft tissues can grow in.

7. The cervical anterior self-fixing artificial vertebral body according to claim 1 or 2, wherein the upper end of the vertebral body component (1) is an arc-shaped structure (2), the arc-shaped structure (2) is arranged on an inclined plane forming an included angle of 9 degrees with the cross section, and the arc radius of the arc-shaped surface in a sagittal plane is 10-18 degrees; the lower end of the vertebral body component (1) is an inclined plane structure (3) which forms an angle of 10-15 degrees with the cross section.

8. The anterior cervical self-fixating artificial vertebral body according to claim 1 or 2, wherein the serrations comprise an upper end serration structure (8a) and a lower end serration structure (8b), and the depth of the serrations is 0.7-1.0 mm.

9. An anterior cervical self-fixating artificial vertebral body according to claim 1 or 2, wherein the cellular structure comprises an upper end cellular structure (9a) and a lower end cellular structure (9 b).

10. An anterior cervical self-fixating artificial vertebral body according to claim 1 or 2, wherein the diamond-shaped fenestration (11) is formed by a plurality of diamond-shaped holes, the area of the diamond-shaped holes occupying more than 50% of the total area of the side wall of the vertebral body part (1).

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