CN106333771A - Simple artificial cervical intervertebral prosthesis - Google Patents

Abstract

The present invention relates to a simple artificial cervical intervertebral disc, comprising: an upper plate, a middle backing plate, and a lower plate. The upper end surface of the upper plate is designed with upper positioning ribs and upper positioning teeth, the lower end surface of the upper plate is a circular cavity, the top surface of the circular cavity is a convex spherical design, and the middle pad is disc-shaped. The upper end surface of the pad is designed as a concave spherical surface, which can disperse the external force. The lower end surface of the intermediate pad is designed as a concave spherical or flat surface, and the intermediate pad is made of ceramic materials or other materials; the upper end surface of the lower end plate A circular encirclement is designed, and the effect of the encirclement is to make the position of the middle backing plate within the scope of the encirclement, and the inner bottom surface of the encirclement is a convex spherical design or plane design. The lower end surface of the lower plate is designed with lower positioning ribs and lower positioning teeth, and the upper end surface of the upper plate and the lower end surface of the lower plate can be coated. The upper plate and the lower plate are made of polyether ether ketone or other materials.

Description

Simple Artificial Cervical Disc

technical field

The invention relates to an artificial cervical intervertebral disc, in particular to a simple artificial cervical intervertebral disc.

Background technique

The artificial cervical intervertebral discs currently used in clinical practice are complex in design and structure, and almost all consider mechanical issues one-sidedly. These designs ignore that the human body is a complex internal environment that combines multiple functions and multiple factors, such as patents CN105105890A, CN 103417313 B Such as the artificial intervertebral discs that have been disclosed, the size and structure of these designs are relatively complicated, and many problems such as wear, heat generation, and shedding may occur when the human body is active, and these designs combine the intermediate parts that cooperate with the upper endplate and the lower endplate. The shape of the upper surface is designed as a convex spherical shape, and the middle part is the most critical part of the mechanical action. When the human body is active, when the force from the upper segment of the vertebral body acts on the middle part, the direction of the force is towards the middle part. The central direction is concentrated, and the function of the human intervertebral disc is to disperse and eliminate the external force, which is just the opposite of the physiological function of the human intervertebral disc. These design the outer surface of the middle part into a convex spherical shape, which makes the middle part direct the external force to the center The structural form with concentrated parts, in clinical application, the intermediate parts may be deformed or broken due to long-term stress, which brings great risks to patients and puts patients in long-term safety hazards.

Technical solutions

The purpose of the present invention is to overcome the above shortcomings and deficiencies, and to design a kind of artificial cervical intervertebral disc with simple structure and suitable for human physiological anatomy, which is convenient to use in the operation process and suitable for various human physiological anatomies.

The technical scheme of the present invention is realized like this: it is made up of upper plate, middle backing plate, lower plate. The upper plate is made of polyether ether ketone material, and other materials can also be used. The upper end surface of the upper plate is designed with upper positioning ribs. The function of the upper positioning ribs is to fix the position of the upper plate after it contacts with the upper vertebral body of the human body. The upper surface of the upper end surface and the upper surface of the positioning rib are designed with upper positioning teeth, and the upper surface of the upper plate can be coated. The purpose of the coating is to coat the upper end surface with a material that is compatible with human bone growth; the lower end surface of the upper plate is round Shaped inner cavity, the top surface of the circular inner cavity is a convex spherical design, and the surface of the cylindrical inner cavity is smooth, which is to cooperate with the upper end surface of the middle pad; the middle pad is a disc-shaped middle pad The upper end surface and the lower end surface can be designed as a concave spherical surface at the same time or the upper end surface is designed as a concave spherical surface and the lower end surface is designed as a plane. The concave design of this end surface can disperse the external force. The intermediate pad is made of ceramic material or other materials; The upper end surface of the plate is designed with a circular encirclement, and the effect of the encirclement is to make the position of the intermediate pad be within the scope of the encirclement, and the inner bottom surface of the encirclement is a convex spherical design or planar design. The lower end surface of the lower final plate is designed with lower positioning ribs. The function of the lower positioning ribs is to fix the position of the lower plate after it contacts the lower vertebral body of the human body. Both the upper end surface of the lower plate and the upper surface of the positioning ribs are designed with lower positioning teeth. The lower plate is made of polyether ether ketone material, and other materials can also be used. The upper surface of the lower end plate can be coated. The purpose of the coating is to coat the lower end surface with a material that is compatible with human bone growth.

When in use, the upper part of the middle backing plate is put into the circular cavity on the lower end surface of the upper plate, so that the upper end surface of the middle backing plate and the top surface of the cylindrical cavity form a smooth concave-convex spherical surface. According to the principle of mechanics, this can make the human body When the external force transmitted from the vertebral body to the upper endplate reaches the upper surface of the concave liner, it passes through the convex and concave spherical surface matching structure, so that the external force is naturally dispersed to the surroundings. The relative movement between the upper plate and the middle backing plate, and between the middle backing plate and the lower plate can be carried out in six directions including up and down, front and back, left and right. Obviously, the simple design of the present invention solves the problem of stress, and enables the patient's neck to move in 6 directions, such as up and down, front and back, left and right, and at the same time adapts to the physiological and anatomical structure of the human body, and chooses different sizes for different races. and people of different ages.

Description of drawings

Fig. 1 is the three-dimensional exterior view of preferred embodiment among the present invention, among the figure: upper plate (1), upper positioning rib (1a), upper positioning tooth (1b), middle backing plate (2), lower plate (3), The lower positioning rib (3a), the lower positioning tooth (3b), and the surrounding ring (3c).

Fig. 2 is the assembled sectional view of preferred embodiment among the present invention

Fig. 3 is the upper plate (1) bottom view of preferred embodiment in the present invention

Fig. 4 is the lower plate (3) bottom view of preferred embodiment in the present invention

Fig. 5 is the sectional view of the middle pad (2) of the preferred embodiment in the present invention

specific implementation plan

Referring to Fig. 1, the upper end surface on the upper plate (1) has upper positioning ribs (1a), and the effect of the upper positioning ribs (1a) is to fix the position of the upper plate (1) after contacting with the upper vertebral body of the human body. The upper end surface of (1) and the upper surface of the upper positioning rib (1a) are all designed with sharp-toothed upper positioning teeth (1b). These upper positioning teeth (1b) are to increase the connection between the upper plate (1) and the upper segment of the human spine relatively fixed, the lower end surface of the upper plate (1) is provided with a circular inner cavity, the top surface of the circular inner cavity is a convex spherical design, the surface of the circular inner cavity is smooth, and the upper end surface of the upper plate (1) can be painted The purpose of the coating is to coat the upper end with a material that is compatible with human bone growth. The middle pad (2) is disc-shaped, and the middle pad (2) is made of ceramics or other materials. The upper end surface and the lower end surface of the middle pad (2) can be designed as smooth concave spherical The lower end surface of the smooth concave spherical surface is designed as a plane. The upper end surface of lower plate (3) is designed with circular encirclement (3c), and the effect of encirclement (3c) is to limit the movement of intermediate pad (2) within a certain range, and the inner bottom surface of encirclement (3c) circle is Convex spherical design or planar design, the inner surface of the ring (3c) is smooth, the lower end surface of the lower plate (3) is designed with a lower positioning rib (3a), the lower end surface of the lower plate (3) and the lower positioning rib (3a) the surface is all designed with tine-shaped lower positioning teeth (3b), these lower positioning teeth (3b) are in order to increase the relative fixation between the lower plate (3) and the lower segment of the human spine, the lower end surface of the lower plate (3) It can be coated, and the purpose of the coating is to coat the lower end surface with a material with good compatibility with human bone growth. The upper plate (1) and the lower plate (3) are made of polyether ether ketone or other materials.

When in use, the upper part of the middle pad (2) is put into the circular inner cavity of the lower end surface of the upper plate (1), and the top surface of the circular inner cavity of the upper plate (1) is in contact with the upper end surface of the middle pad (2) , forming a smooth convex-concave spherical surface. According to the principle of mechanics, when the external force transmitted from the upper vertebral body of the human body to the upper plate (1) reaches the upper surface of the middle pad (2), it passes through the convex and concave spherical surface. Cooperate to disperse the external force to the surroundings, and play the role of dispersing and relieving the external force. At the same time, because the matching part is a smooth convex-concave spherical design, the relative movement between the upper plate (1) and the middle pad (2) can be up and down, front and rear, Carry out in 6 directions such as left and right; The lower end face of middle backing plate (2) is put in the circular enclosure (3c) of the upper end face of lower plate (3), makes the lower end face of middle backing plate (2) and circular The inner bottom surface of the enclosure (3c) forms a smooth concave-convex spherical fit or a smooth plane fit, which is that the relative movement of the lower plate (3) and the middle pad (2) can be carried out in 6 directions such as up and down, front and back, left and right. Obviously, the simple design of the present invention not only solves the problem of stress, but also enables the patient's neck to move in six directions, such as up and down, front and back, left and right, etc., and at the same time adapts to the physiological and anatomical structure of the human body. People of different races and ages.

Claims (8)

1. easy cervical artificial disc, it includes upper plate (1), middle disc (2), lower plate (3), the upper end of middle disc (2) Face is concave spherical design.

2. according to the easy cervical artificial disc described in claim 1 it is characterised in that: on upper plate, (1) has upper positioning bar (1a), upper positioning tooth (1b).

3. according to the easy cervical artificial disc described in claim 1 it is characterised in that: there is circle the lower surface of upper plate (1) Inner chamber, the top surface of round cavity is convex spherical.

4. according to the easy cervical artificial disc described in claim 1 it is characterised in that: the lower surface of middle disc (2) is Concave sphere or planar design.

5. according to the easy cervical artificial disc described in claim 1 it is characterised in that: upper plate (1) is joined with middle disc (2) Conjunction face is the cooperation of convex spherical and concave spherical face.

6. according to the easy cervical artificial disc described in claim 3 it is characterised in that: lower plate (3) is joined with middle disc (2) Conjunction face be fovea superior spherical with the cooperation of convex spherical or plane and plane cooperation.

7. according to the easy cervical artificial disc described in claim 1 it is characterised in that: there is lower positioning lower plate (3) lower surface Muscle (3a), lower positioning tooth (3b).

8. according to the easy cervical artificial disc described in claim 1 it is characterised in that: there is enclosure the upper surface of lower plate (3) (3c), the inner bottom surface of enclosure (3c) is convex spherical or plane.