CN205626206U - Bionical anticreep position goat lumbar vertebrae junctional complex - Google Patents

Abstract

The utility model discloses a bionic anti-dislocation goat lumbar vertebra connection complex, which comprises a vertebral body part and an intervertebral disc part. The vertebral body part is composed of a K-shaped geometric body similar to the lumbar vertebra of a goat. The interior of the geometric body is hollowed out. There are circular grooves and rectangular through grooves on the side, and annular grooves on the upper and lower ends. The inner wall of the groove is a large hemispherical structure. The intervertebral disc component includes a bottom plate, an arc-shaped side plate and a cylindrical protrusion, the arc-shaped side plate is provided with screw holes, and the end of the cylindrical protrusion is a nearly hemispherical shell structure with two arc-shaped protrusions. The proximal hemispherical shell structure and the large hemispherical structure cooperate to form a ball-and-socket joint. The articular surface is polished, and there is a hydroxyapatite coating in the complex that contacts the bone surface. The utility model can not only replace the vertebral body and adjacent intervertebral discs removed during the operation, but also retain the functions of rotation, flexion and extension of the intervertebral discs. The ball and socket joint structure is equipped with an anti-off device, which not only ensures postoperative stability, but also retains The mobility of the lumbar spine is closer to the physiological state of goats.

Description

Bionic anti-dislocation goat lumbar connection complex

technical field

The utility model belongs to the technical field of medical prosthesis manufacturing, in particular to a bionic dislocation-preventing goat lumbar connection complex for prosthesis transplantation after goat lumbar vertebral body and adjacent intervertebral disc resection, and which can retain the lumbar activity function.

Background technique

Goats belong to the class Mammalia, and generally have 6-7 lumbar vertebral bodies. Compared with human lumbar vertebrae, the vertebral bodies are longer, but the coronal and sagittal diameters are smaller. The bodies are also connected by intervertebral discs, thus ensuring the movement functions of the vertebral bodies such as rotation, flexion and extension. Although goats cannot walk upright like humans, some scholars have found that the force of the lumbar vertebrae is similar to that of the human lumbar spine due to the action of the paravertebral muscles. In vivo and in vitro experiments for safety assessment.

Lumbar tuberculosis, tumors, and old fractures often lead to serious complications such as scoliosis and spinal cord compression, which are a type of disease that seriously threatens human health. At present, the above-mentioned diseases are usually treated with titanium cage bone graft fusion combined with screw rod internal fixation after debridement. Because this operation can obtain immediate and long-term stability, it is widely used by spine surgeons. However, this operation usually fuses at least three adjacent vertebral bodies, and the fused vertebral body loses its normal activity function, resulting in stress concentration and increased range of motion of the unfused segment, which can lead to adjacent intervertebral disc degeneration, secondary spinal stenosis, Facet joint degeneration, acquired spondylolisthesis, instability and other serious complications. In addition, some scholars have found in long-term follow-up that patients undergoing titanium cage bone graft fusion may have complications such as titanium cage subsidence, and those with severe conditions require reoperation. In order to overcome the above defects, research on artificial vertebral bodies and artificial intervertebral discs has been receiving much attention, and great progress has been made so far, but there are still complications such as difficulty in retaining the physiological functions of the spine or causing spinal instability.

In order to solve the above problems, domestic professors He Xijing and Lei Wei focused on the research of artificial vertebral body and intervertebral disc system for the first time. At present, gratifying achievements have been made in the cervical spine. The bionic atlantoaxial prosthesis and the artificial vertebral body of the lower cervical spine and The intervertebral disc complex has achieved satisfactory results in goat in vivo and in vitro studies. However, due to the complex anatomical structure and physiological functions of the lumbar spine, it is difficult to apply the artificial vertebral body and intervertebral disc complex of the cervical spine to the lumbar spine. The lumbar complex must meet the following three points: 1. Ensure the immediate and long-term stability of the spine after implantation. 2. Preserve the motor function of the adjacent vertebral body. 3. Meet the load-bearing function of the normal spine. But artificial prosthesis, artificial intervertebral disc and artificial vertebral body and intervertebral disc system of lower cervical vertebra are all difficult to accomplish at present. In order to solve this problem, the applicant designed an artificial lumbar spine and intervertebral disc connection complex. In order to evaluate its safety, it is necessary to conduct in vivo and in vitro studies in goats. However, due to the difference between the anatomy of the goat lumbar spine and the human body, the connection complex cannot be directly used in goats. , so according to the anatomical characteristics of the goat lumbar spine, a bionic anti-off goat lumbar complex is designed, and the literature at home and abroad is consulted. This design is still the first case.

Contents of the invention

The purpose of the utility model is to fully absorb the advantages of the current artificial intervertebral disc and artificial vertebral body, learn from each other and integrate the anatomical characteristics of the goat lumbar vertebra to provide a bionic anti-dislocation goat lumbar connection complex.

In order to achieve the above object, the utility model adopts the following technical solutions:

The goat lumbar connection complex includes vertebral body parts and intervertebral disc parts arranged at both ends of the vertebral body parts, the vertebral body parts include a K-shaped geometry, and the intervertebral disc parts include bottom plates corresponding to the end plates and side shapes of the lumbar vertebral body respectively and an arc-shaped side plate, the arc-shaped side plate is arranged on the bottom plate, and the bottom plate of the intervertebral disc component is connected with the corresponding side end surface of the K-shaped geometric body through a ball joint.

The edge of the bottom plate is composed of an elliptical arc segment and a line segment connected to the two ends of the elliptical arc segment. The connection between the elliptical arc segment and the line segment is smoothed. The arc-shaped side plate is arranged on the elliptical arc segment of the edge of the bottom plate, the arc-shaped side plate is inclined inward and forms an angle of 60-70 degrees with the bottom plate, and the arc-shaped side plate is provided with screw holes .

The two screw holes are not on the same horizontal plane.

The bottom plate is provided with conical denticulations and cylindrical protrusions, the conical denticulations and the arc-shaped side plates are located on the same side surface of the bottom plate, and the conical denticulations are distributed on the bottom plate at intervals along elliptical lines, The cylindrical protrusion is located on the other side surface of the bottom plate, and the center line of the cylindrical protrusion coincides with the plane center of the bottom plate.

The side of the K-shaped geometry includes a rectangular plane extending along the coronal plane and a saddle-shaped curved surface connected to the rectangular plane, a cavity is arranged in the K-shaped geometry, and several A circular groove and a rectangular through groove communicating with the cavity, the two end faces of the K-shaped geometric body are provided with a circular groove, and the groove is provided with a ball used as a ball joint joint head , there is a gap between the ball and the groove.

The circular grooves are randomly distributed on the side of the K-shaped geometric body, the rectangular through grooves run along the sagittal plane and the coronal plane respectively and are symmetrically distributed on the K-shaped geometric body with respect to the middle horizontal plane, and the height of the sphere is Out of the corresponding side end surface of the K-shaped geometric body, a spherical shell for use as a socket of a ball-and-socket joint is provided in the gap to cooperate with the sphere, and the spherical shell is connected to the cylindrical protrusion provided on the bottom plate .

Two arc-shaped protrusions are arranged on the edge of the opening of the spherical shell. The two arc-shaped protrusions are opposite and distributed symmetrically with respect to the median sagittal plane. Two notches are arranged on the wall surface of the groove. The positions of the two notches are opposite and distributed symmetrically with respect to the coronal plane, and the distance between the outer walls of the two arc-shaped protrusions is less than or equal to the distance between the two notches, and the distance is greater than the diameter of the opening of the groove.

Both the vertebral body part and the intervertebral disc part are integrally formed.

The goat lumbar connection complex is made of medical titanium alloy, and the side surfaces of the vertebral body parts and the surfaces of the intervertebral disc parts that are in direct contact with the bone surface are all provided with hydroxyapatite coating.

The articular surface of the ball and socket joint is polished.

The beneficial effects of the utility model are reflected in:

The bionic anti-dislocation goat lumbar connection complex described in the utility model fully considers the anatomical characteristics of the goat lumbar vertebrae. The vertebral body parts adopt a K-shaped geometric body, and the bottom plate and arc-shaped side plates on the intervertebral disc parts are closely combined with the adjacent vertebral bodies, effectively reducing contact. The stress concentration on the surface meets the load-bearing function of the normal lumbar spine. Due to the existence of the ball and socket joint, the rotation, flexion and extension functions of the intervertebral disc are preserved, which is closer to the physiological state. The utility model can be used for the safety evaluation of the artificial lumbar vertebrae and the intervertebral disc connection complex.

The further technical effect that the utility model obtains is as follows:

1. The ball-and-socket joint made of titanium alloy not only makes the center of activity exactly in the center of the intervertebral space, avoiding potential complications caused by misalignment of the center of activity, but also retains the rotation, lateral bending, forward flexion and back extension of the vertebral body The function is closer to the physiological state. The utility model can replace the vertebral body and adjacent intervertebral discs removed in goat lumbar surgery, and the ball-and-socket joint structure is provided with an anti-off device, which not only ensures postoperative stability, but also retains the mobility of the lumbar spine. It is closer to the physiological state of goats.

2. The shape of the bottom plate of the intervertebral disc component of the present invention is similar to that of the front part of the goat lumbar endplate. The bottom plate is provided with a conical tooth process, which makes the combination of the bottom plate and the endplate more tightly and firmly. The arc-shaped side plate fits closely with the side of the vertebral body, which increases the contact area and effectively avoids stress concentration. The cylindrical protrusions on the bottom plate can well withstand the transverse shear force generated by flexion and extension, avoiding deformation and breaking and other adverse events.

3. The side of the vertebral body part of the utility model is provided with randomly distributed small circular grooves, which are beneficial to the attachment of surrounding tissues and the ingrowth of residual bone. The cavity inside the K-shaped geometry and the rectangular through groove can accommodate more Implanted into the bone, which is more conducive to the fusion with the surrounding tissue and ensures long-term postoperative stability.

4. The inner and outer sides of the spherical shell, the surface of the sphere and the outer wall of the groove in the utility model are all polished, which effectively reduces the friction of the articular surface. The apatite coating is more conducive to the fusion with the surrounding tissue, ensuring mobility and stability.

5. The curved side plate of the utility model is provided with two screw holes that are not on the same horizontal plane. Through implantation of screws in different directions, the curved side plate is firmly fixed on the adjacent vertebral body, reducing loosening and prolapse risks of.

Description of drawings

Fig. 1 is the front view of the utility model;

Fig. 2 is the rear view of the utility model;

Fig. 3 is a side view of the utility model;

Fig. 4 is the bottom view of the utility model;

Fig. 5 is the sagittal section view of the utility model;

Fig. 6 is the front view of vertebral body part;

Fig. 7 is the sagittal section view of vertebral body part;

Figure 8 is an isometric view of a vertebral body component;

Fig. 9 is the bottom view of vertebral body parts;

Figure 10 is a rear view of an intervertebral disc component;

Figure 11 and Figure 12 are schematic diagrams of the parameters of the vertebral body parts;

Figure 13 and Figure 14 are schematic diagrams of the parameters of the intervertebral disc components;

In the figure: 1 is the K-shaped geometry, 2 is the bottom plate, 3 is the curved side plate, 4 is the ball joint, 6 is the elliptical arc segment, 7 is the line segment, 8 is the smooth treatment, 9 is the screw hole, 10 is the conical shape Tooth process, 11 is a cylindrical protrusion, 12 is a cavity, 13 is a circular groove, 14 is a rectangular through groove, 15 is an end face, 16 is an annular groove, 17 is a large hemispherical structure, 18 is a gap, 19 is a spherical shell, 20 is an arc-shaped protrusion, 21 is an opening of an annular groove on the end face of a K-shaped geometric body, and 22 is a screw.

detailed description

The utility model is described in detail below in conjunction with accompanying drawing and embodiment.

Referring to FIGS. 1 to 10 , the bionic anti-dislocation goat lumbar connection complex of the present invention includes vertebral body parts, intervertebral disc parts and screws 22 .

The vertebral body part is composed of a K-shaped geometric body 1 in the shape of a goat lumbar vertebra. A cavity 12 is formed inside the K-shaped geometric body 1, and small circular grooves 13 are randomly distributed on the side, and two rectangular through grooves with opposite openings running along the sagittal plane 14 and two opposite rectangular through grooves 14 running along the coronal plane, the rectangular through grooves 14 are symmetrically distributed along the middle horizontal plane of the K-shaped geometric body 1, and the upper and lower ends 15 of the K-shaped geometric body 1 are provided with annular grooves 16, and the annular grooves The inner wall of 16 is a large hemispherical structure 17, the top of the large hemispherical structure 17 is higher than the end face 15 of the K-shaped geometry, and the outer wall of the annular groove 16 is provided with two gaps 18 symmetrically distributed about the coronal plane.

The intervertebral disc component comprises a base plate 2 corresponding to the shape of the end plate of the lumbar vertebral body and an arc-shaped side plate 3 corresponding to the side shape of the lumbar vertebral body. The line segment 7 connected to the two ends of the elliptical arc segment is composed of a rounded end point. The elliptical arc segment 6 is symmetrical to the major axis of the corresponding ellipse. The extension length of the side plate 3 is less than or equal to a quarter ellipse, and the bottom plate 2 is provided with a conical tooth process 10 and a cylindrical protrusion 11, and the conical tooth process 10 and the arc-shaped side plate 3 are located on the same side surface of the bottom plate 2 , the conical denticles 10 are evenly distributed on the bottom plate 2 along the elliptical line, and the cylindrical protrusions 11 are located on the surface of the bottom plate 2 away from the adjacent lumbar endplate, and its center line coincides with the center of the plane of the bottom plate 2. The cylindrical protrusions The end of 11 is connected to the proximal hemispherical shell 19, and the edge opening of the proximal hemispherical shell 19 is connected to two arc-shaped protrusions 20, the two arc-shaped protrusions 20 are opposite and distributed symmetrically about the median sagittal plane, and the two arc-shaped protrusions 20 The distance between the outer wall surfaces is less than or equal to the distance between the two notches 18 and greater than the outer diameter of the annular groove at the opening of the end face of the K-shaped geometric body. The two arc-shaped protrusions 20 can be put into the annular groove 16 through the two gaps 18. After entering, the arc-shaped protrusions 20 will be kept away from the gap 18 by rotating, thereby preventing the spherical shell 19 from coming out of the annular groove 16, not only forming a ball socket joint 4, and ensure the stability of the ball joint 4. The curved side plate 3 is provided with two screw holes 9 that are not on the same horizontal plane, and the curved side plate 3 is firmly fixed on the adjacent vertebral body by screws 22 . The structure of the spherical shell 19 in the connection complex cooperates with the large hemispherical structure 17 to form a ball-and-socket joint 4. The ball-and-socket joint 4 ensures the functions of rotation, lateral bending, flexion, and dorsiflexion of the adjacent vertebral body after operation. The screw 22 They are respectively located in the screw holes 9.

It can be seen from FIG. 5 and FIG. 7 that the annular groove 16 is the gap for placing the spherical shell 19 , and the outer diameter of the opening of the annular groove on the end face of the K-shaped geometric body is smaller than the distance between the outer walls of the arc-shaped protrusions 20 .

The vertebral body parts and intervertebral disc parts are all made of medical titanium alloy, and the surface in direct contact with the bone surface is coated with hydroxyapatite, which is more conducive to the fusion with the surrounding tissues and ensures postoperative stability. The inner and outer surfaces of the spherical shell 19 and the inner and outer walls of the annular groove 16 are all polished, which can effectively reduce the friction of the contact surface (articular surface).

Referring to Figures 6 to 9, the K-shaped geometric body of the vertebral body has a body height of 40±3mm, a median sagittal diameter of the middle horizontal plane of 10±1mm, and a posterior coronal diameter of 14±2mm. Smooth curves are used for connection, and the connection is rounded and rounded with a radius of R1 = 1mm. The median sagittal diameter of the horizontal plane 10mm away from the middle horizontal plane is 13±1mm, and the posterior coronal diameter is 18±2mm. The endpoints connecting the front arc and the rear line segment are connected by a smooth curve, and the joint is rounded with a radius of R2=2mm. deal with. The median sagittal diameter of the horizontal plane 15-20mm away from the middle horizontal plane is 15±1mm, and the posterior coronal diameter is 22±2mm. The endpoints connecting the front arc and the rear line segment are connected by a smooth curve, and the connection is a circle with a radius of R3=3mm. The corners are rounded, and the rear edges of the above-mentioned horizontal planes are located on the same coronal plane. The upper and lower sides of the K-shaped geometric body 1 are hollowed out at a distance of 2 to 3 mm from the middle horizontal plane, so that the side wall thickness is 2 to 3 mm, and the openings of the four rectangular through-slots 14 on the side are 4 mm × 6 mm, and the small round slots 13 are randomly distributed on the side. The depth is 1mm and the radius is 1mm.

Referring to Fig. 11 and Fig. 12, the diameter of the large hemispherical structure 17 D2=10mm, the distance between the top of the large hemispherical structure 17 and the end face 15 of the K-shaped geometry is H1=2mm, the width of the annular groove 16 W2=1.5mm, the annular groove Groove is in the opening 21 outer diameter D3=11mm of K-shaped geometry end face, the gap 18 spacing D1=13mm on the outer wall of annular groove 16, width W=6.2mm, depth H2=3mm, gap 18 bottoms are apart from annular groove 16 bottoms End H3=2mm, K-shaped geometric body 1 internally hollowed out distance W1=3～5mm, K-shaped geometric body end surface 15 rear coronal diameter is W3=22±2mm.

Referring to Fig. 13 and Fig. 14, the thickness of the intervertebral disc component bottom plate 2 and arc side plate 3 is H6 = 1.5mm, the radius of the minor axis of the elliptical arc segment 6 on the edge of the base plate 2 is 13 mm, the radius of the major axis is 15 mm, and the radius of the elliptical arc segment 6 and the line segment The joints of 7 are rounded and smoothed with a radius of R4=2mm. The arc-shaped side plate 3 is 12mm high and forms an angle of 60-70 degrees with the bottom plate 2. The cylindrical protrusion 11 has a radius of 4mm and a height of H4=1mm. The end is connected with the spherical shell 19, the thickness of the spherical shell 19 is W5=1.3mm, the height of the spherical shell 19 from the edge of the opening is H5=2mm, the distance between the outer wall of the arc-shaped protrusion 20 is W4=12.8mm, and the arc-shaped protrusion width W6= 6mm.

The thickness of the hydroxyapatite coating is 20 μm.

The above parameters can be changed appropriately according to the difference in the size of goat lumbar vertebrae.

The assembly relationship of the bionic anti-dislocation goat lumbar vertebra connection complex described in the utility model is as follows: the spherical shell 19 and the arc-shaped protrusion 20 structure at the end of the cylindrical protrusion 11 on the bottom plate 2 and the large hemispherical structure 17 and the annular structure on the vertebral body parts. The groove 16 constitutes the ball-and-socket joint, and each contact surface of the ball-and-socket joint is highly polished to ensure less friction and wear of the joint during movement. On the vertebral body. The shape of the bottom plate 2 of the intervertebral disc component is similar to that of the goat lumbar vertebral endplate. The conical odontoid process 10 makes the connection between the bottom plate 2 and the adjacent endplate more firm, and the curved side plate 3 increases the contact area with the adjacent vertebral body, effectively reducing the stress Concentrate, so as to meet the load-bearing function of the lumbar spine. The interior of the vertebral body is hollowed out, which can accommodate more bone grafts. The side is provided with rectangular through-slots 14 and randomly distributed small circular slots 13, which is more conducive to the attachment and growth of surrounding tissues and ensures long-term postoperative stability. . The anti-falling ball and socket joint not only ensures the stability of the intervertebral disc after implantation, prevents the separation of the intervertebral disc and the vertebral body, but also retains the functions of rotation, lateral bending, forward flexion and dorsiflexion between the vertebrae, which is more in line with the physiological state of goats .

In a word, the bionic anti-dislocation goat lumbar connection complex of the present invention includes vertebral body parts, intervertebral disc parts and screws. The vertebral parts are composed of a "K"-shaped geometric body similar to the lumbar vertebra of a goat. The interior of the geometric body is hollowed out. There are small round grooves and rectangular through grooves on the side, and annular grooves on the upper and lower ends. The inner wall of the groove is a large hemispherical structure. , There are two small gaps on the front and back of the outer wall. The intervertebral disc component is composed of a base plate, an arc-shaped side plate and a cylindrical protrusion. The base plate is provided with a conical tooth process, and the arc-shaped side plate is provided with two screw holes that are not on the same level. The end of the cylindrical protrusion has two A nearly hemispherical shell structure with arc-shaped protrusions. The proximal hemispherical shell structure on the intervertebral disc component in the connection complex cooperates with the large hemispherical structure on the vertebral body component to form an anti-falling ball-and-socket joint. The articular surface is polished, and there is hydroxyapatite in the complex that contacts the bone surface coating. The utility model can not only replace the vertebral body and adjacent intervertebral discs removed in goat lumbar surgery, but also retains the functions of rotation, flexion and extension of the intervertebral discs, and the whole structure is equipped with an anti-off device, which not only ensures postoperative stability, but also retains the intervertebral disc. The mobility of the lumbar spine is improved, which is closer to the physiological state of goats in bionics, and can be used as a safety evaluation model for human prostheses.

Claims (10)

1. a bionical anti-dislocation goat lumbar vertebra junctional complex, it is characterized in that: this goat lumbar vertebra junctional complex includes vertebral body parts and is arranged at the disc components at vertebral body parts two ends, described vertebral body parts include K font solid (1), described disc components includes base plate (2) corresponding with the soleplate of lumbar vertebra and side view and arc side plate (3) respectively, described arc side plate (3) is arranged on described base plate (2), it is connected by ball-and-socket joint (4) between base plate (2) and the respective side end face of K font solid (1) of described disc components.

A kind of bionical anti-dislocation goat lumbar vertebra junctional complex, it is characterized in that: the line segment (7) that the edge of described base plate (2) is connected by oval segmental arc (6) and the two ends with this ellipse segmental arc (6) forms, described oval segmental arc (6) and the round and smooth process in junction of line segment (7), described oval segmental arc (6) is with corresponding oval long axial symmetry, described arc side plate (3) is arranged in the oval segmental arc (6) at described base plate (2) edge, described arc side plate (3) slopes inwardly and with described base plate (2) in 60～70 degree of angles, screw (9) it is provided with on described arc side plate (3).

A kind of bionical anti-dislocation goat lumbar vertebra junctional complex, it is characterised in that: described screw (9) is two, and two screws (9) are not in same level.

A kind of bionical anti-dislocation goat lumbar vertebra junctional complex, it is characterized in that: on described base plate (2), be provided with coniform tooth prominent (10) and cylindrical protrusion (11), coniform tooth prominent (10) and described arc side plate (3) are positioned at the surface, the same side of described base plate (2), coniform tooth prominent (10) is spaced apart on described base plate (2) along ellipse, cylindrical protrusion (11) is positioned on the opposite side surface of described base plate (2), the centrage of cylindrical protrusion (11) overlaps with described base plate (2) planar central.

A kind of bionical anti-dislocation goat lumbar vertebra junctional complex, it is characterized in that: the side of described K font solid (1) includes the rectangle plane extended along coronalplane and the saddle curved surface being connected with described rectangle plane, it is provided with cavity (12) in described K font solid (1), several circular grooves (13) and the rectangle through slot (14) connected with described cavity (12) it is provided with on the side of described K font solid (1), being provided with opening on two end faces of described K font solid (1) is circular groove, it is provided with in described groove for the spheroid as ball-and-socket joint ball and socket joint, gap is left between described spheroid and described groove.

A kind of bionical anti-dislocation goat lumbar vertebra junctional complex, it is characterized in that: described circular groove (13) is randomly distributed on the side of described K font solid (1), described rectangle through slot (14) along sagittal plane and the traveling of coronalplane direction and is distributed on described K font solid (1) about by-level face respectively symmetrically, described spheroid exceeds described K font solid (1) respective side end face, be provided with in described gap coordinate with described spheroid for as the glenoid spherical shell of ball-and-socket joint (19), described spherical shell (19) is connected with the cylindrical protrusion (11) being arranged on described base plate (2).

A kind of bionical anti-dislocation goat lumbar vertebra junctional complex, it is characterized in that: at the edge of opening of described spherical shell (19), be provided with two arc-shaped protrusions (20), said two arc-shaped protrusions (20) position is relative, and it is symmetrical about median sagittal plane, two breach (18) it are provided with on the wall of described groove, two breach (18) positions are relative and symmetrical about coronalplane, being smaller than or equal to the distance between said two breach (18) of the outside wall surface of two arc-shaped protrusions (20), and more than the diameter at described slot opening.

A kind of bionical anti-dislocation goat lumbar vertebra junctional complex, it is characterised in that: described vertebral body parts and disc components all use one-body molded.

A kind of bionical anti-dislocation goat lumbar vertebra junctional complex, it is characterized in that: described goat lumbar vertebra junctional complex uses medical titanium alloy material, and the surface that the side of described vertebral body parts and disc components directly contact with surface of bone is provided with hydroxyapatite coating layer.

A kind of bionical anti-dislocation goat lumbar vertebra junctional complex, it is characterised in that: the articular surface of described ball-and-socket joint uses polishing.