TWI724962B - Artificial intervertebral disc - Google Patents

Abstract

This creation is an artificial intervertebral disc, which is set between two adjacent vertebral body bones and includes a lower plate body, a movable part and an upper plate body. The lower plate body and the upper plate body are respectively against the two vertebral body bones. The plate body includes a lower plate, an outer lower hole with many lower holes, and two lower claws. The outer lower hole is formed at the bottom of the lower plate. The lower claw is set on the top of the lower plate and restricts the movable part. The upper plate is located The top of the movable part includes an upper plate, an outer upper hole with a plurality of upper holes, and two upper claws. The outer upper hole is formed on the top of the upper plate, and the upper claw is set at the bottom of the upper plate and limits the movable part. Creation of artificial intervertebral discs. The lower and upper plates slide on the movable parts to provide vertebral bone bending and rotation. The outer inferior foramen and outer superior foramen are used for vertebral bone growth and fixation of the artificial intervertebral disc, reducing the complexity of the operation .

Description

Artificial intervertebral disc

This creation is an artificial intervertebral disc, especially an artificial intervertebral disc that is easy to implement and can have a porous material for bone growth.

Modern people sit for a long time and have incorrect postures, leading to a herniated disc on the spine between the bones of two adjacent vertebral bodies. The herniated disc compresses the nerves, causing low back pain. The intervertebral disc is a fibrocartilage disc material that connects the bones of two adjacent vertebral bodies. The intervertebral disc includes an annulus fibrosus (annulus fibrosus) encircled in a circle and a nucleus pulposus (nucleus pulposus) located in the center of the annulus. It can support the two adjacent vertebral body bones. The nucleus pulposus is located in the center of the annulus fibrosus. The annulus fibrosus can maintain the stability of the nucleus pulposus. The nucleus pulposus is composed of water, proteoglycan and collagen, and has elasticity. When the two adjacent vertebral body bones are squeezed forward, backward or rotated, the nucleus pulposus and the fibrous annulus bear the pressure generated by the two adjacent vertebral bones to maintain the two phases. The stability of the adjacent vertebral body bones.

When modern people sit for a long time and the posture is incorrect, the intervertebral disc will be compressed by the bones of two adjacent vertebral bodies, the annulus fibrosis will be compressed and prolonged compression will produce bulging. If the bulging condition of the annulus fibrosus deteriorates, it will develop. The annulus fibrosus, showing the bulging state and the protruding state, have not yet ruptured. If the annulus is continuously compressed and torn, the annulus will not be able to restrict the nucleus pulposus and make the nucleus pulposus prolapse. Or more severely cause the nucleus pulposus to be free from the annulus fibrosus. If the annulus fibrosis is torn, it needs to be treated before the tearing condition has deteriorated. Otherwise, the annulus fibrosus is detached or free. Can use surgery to implant artificial intervertebral discs and supplemented with rehabilitation therapy.

If the annulus fibrosus is damaged or the intervertebral disc is degenerated, and an artificial intervertebral disc transplantation operation has to be performed, the traditional operation will be performed by fusion surgery. First, the damaged or degenerated intervertebral disc located between two adjacent vertebral bones is removed. Clear the space between the two adjacent vertebral body bones, and then implant an intervertebral body cage, and a plurality of fixing units are fixed behind the two vertebral body bones and are respectively located on both sides of the intervertebral body bracket, Each fixing unit includes a plurality of bone nails and a bone plate, the plurality of bone nails are respectively set on the two vertebral body bones, and the one bone plate is connected with the plurality of bone nails so that the two vertebral body bones are connected and fixed, which can promote the The bones of the two vertebral bodies are fused and can prevent the bones of the two vertebral bodies from moving excessively.

Although fusion surgery can provide stable support for the bones of the two vertebral bodies, it also makes the bones of the two vertebral bodies lose movement space, unable to bend forward and backward, bend left and right, and rotate. In order to solve the problem of the fusion surgery, the bones of the two vertebrae lose their mobility The existing artificial intervertebral disc is made of elastic polymer plastic. The artificial intervertebral disc includes a lower plate, a sphere and an upper plate. The bottom surface of the lower plate protrudes with a fin, and the top surface of the lower plate forms a concave part. , The sphere is provided in the recess, the upper plate is provided on the top of the sphere, the top surface of the upper plate forms a groove, the groove can accommodate the top of the sphere, the top surface of the upper plate protrudes a convex , The artificial intervertebral disc is transplanted into the emptied two adjacent vertebral body bones, and the two adjacent vertebral body bones will cut out a cavity in line with the fin part and the convex part, so that the fin part The protruding part can extend into the two adjacent vertebral body bones, thereby fixing the artificial intervertebral disc between the two vertebral body bones. The artificial intervertebral disc system has elastic polymer plastics, which can provide the human body activities. Elasticity allows movement between the bones of the two vertebral bodies.

However, the installation of the artificial intervertebral disc requires the two vertebral body bones to be cut out of the cavity, so that the artificial intervertebral disc can be fixed by the fin and the convex part, causing damage to the two vertebral body bones on the human body and increasing the The complexity of the transplantation operation of the artificial intervertebral disc. In addition, the material of the artificial intervertebral disc is polymer plastic. The movement of the two vertebral body bones will wear the artificial intervertebral disc, causing the sphere to be worn to produce fragmented plastic, and the plastic flows into the human blood. Causes a major blockage to the blood vessels of the human body, causing problems that are dangerous to the human body.

The main purpose of this creation is to provide an artificial intervertebral disc, so as to improve the problem of the loss of mobility of the two vertebral body bones caused by the existing fusion surgery, and to improve the existing artificial intervertebral disc that needs to be cut on the vertebral body bone, destroying the vertebral body bone and making the transplantation operation complicated The degree of improvement, and the improvement of the polymer plastics of the existing artificial intervertebral discs. The plastics that are broken due to abrasion are dangerous to the human body.

In order to achieve the purpose of the previous disclosure, the artificial intervertebral disc of this creation is set between two adjacent vertebral body bones and is a composite member made of metal and polymer materials. The artificial intervertebral disc of this creation includes: a lower plate body, the lower plate system resists Lives the bones of the vertebral body below, the lower plate includes a lower plate, an outer lower hole and two lower claws. The lower plate includes a lower base unit made of metal material and a lower covering unit made of polymer material , The lower cladding unit is wrapped and combined with the lower base unit, the outer lower hole is formed at the bottom of the lower base unit of the lower plate and is exposed to the lower cladding unit, and the outer lower hole has a plurality of lower holes , The two lower claws are arranged at intervals on the top of the lower cladding unit of the lower plate and extend upward, and the two lower claws are made of polymer material; a movable part, the movable part is arranged on the lower plate Between the two lower claws of the body, the movable part is located above the lower plate, and the movable part abuts against the two lower claws; and an upper plate body, the upper plate is arranged on the top of the movable part And against the upper vertebral body bone, the upper plate body includes an upper plate, an outer upper hole portion and two upper claw portions, the upper plate is located on the top of the movable part, the upper plate includes a metal material The upper basic unit and an upper cladding unit made of polymer material, the upper cladding unit is wrapped and combined with the upper basic unit, and the outer upper hole is formed on the top of the upper basic unit of the upper plate and is exposed to the The upper cladding unit, the outer upper hole portion has a plurality of upper holes, the two upper claws are arranged at intervals on the bottom of the upper cladding unit of the upper plate and extend downward, and the two upper claws are aggregated Material, the movable part is located between the two upper claws, the two upper claws and the two lower claws are staggered and both abut the movable part, and the two upper claws and the two lower claws are respectively Has an active space There are a plurality of movable spaces between the two lower claws and the upper plate and between the two upper claws and the lower plate

The artificial intervertebral disc of this creation can be rotated forward and backward, left and right, and relative rotation on the movable part through the lower plate body and the upper plate body, respectively, to provide the two adjacent vertebral body bones with forward and backward bending, left and right bending and Rotational activity, and the outer inferior hole and the outer superior hole can provide a good growth environment for the two vertebral body bones, allowing the two vertebral body bones to grow and extend into the lower hole of the outer inferior hole and the outer The upper hole of the upper hole, and then fix the artificial intervertebral disc between the two adjacent vertebral bones, saving the time of transplantation operation and reducing the complexity of the operation, and the artificial intervertebral disc made of metal and polymer composite, It can prevent the material from being worn into fragments and flowing into the blood vessels of the human body, improving the safety of use.

10: Lower board

11: Lower plate

111: Lower basic unit

112: Lower cladding unit

113: inner and lower hole

114: lower joint hole

12: Outer lower hole

13: Lower paw

14: Lower hole

20: Moving parts

30: Upper board body

31: Upper plate

311: Upper basic unit

312: Upper coating unit

313: inner upper hole

314: Upper Combination Hole

32: Outer upper hole

33: Upper claw

34: upper hole

35: Activity gap

36: Event space

37: Upper concave

40: vertebral bone

41: Nerve Bundle

Figure 1: A three-dimensional schematic diagram of a preferred embodiment of the artificial intervertebral disc of the present invention.

Figure 2: A schematic side view of a preferred embodiment of the artificial intervertebral disc of the present invention.

Figure 3: A schematic partial enlarged side sectional view of a preferred embodiment of the artificial intervertebral disc of the present invention.

Figure 4: A schematic top view of a preferred embodiment of the artificial intervertebral disc of the present invention.

Fig. 5: A schematic side view of the rotation state of a preferred embodiment of the artificial intervertebral disc of the present invention.

Fig. 6: A partial enlarged schematic side sectional view of the rotation state of a preferred embodiment of the artificial intervertebral disc of the present invention.

Fig. 7: A schematic side view of the installation state of a preferred embodiment of the artificial intervertebral disc of the present invention.

Fig. 8: A schematic top sectional view of the installation state of a preferred embodiment of the artificial intervertebral disc of the present invention.

Figure 9: A partial cross-sectional schematic diagram of the installation state of a preferred embodiment of the artificial intervertebral disc of the present invention.

As shown in Figure 1, Figure 2 and Figure 7, a preferred embodiment of the artificial intervertebral disc of the present invention is disclosed. As can be seen from the drawings, the artificial intervertebral disc of the present invention is arranged between two adjacent vertebral bones 40 and includes the following The plate body 10, a movable part 20 and an upper plate body 30, wherein the artificial intervertebral disc is a composite member made of metal material and polymer material.

As shown in Figure 1, Figure 2, Figure 7 and Figure 9, the lower plate body 10 is held against the vertebral bone 40 located below, and the lower plate body 10 includes a lower plate 11, an outer lower hole portion 12, and two lower plates. The claw portion 13, the lower plate 11 includes a lower base unit 111 made of a metal material and a lower covering unit 112 made of a polymer material. The lower covering unit 112 is wrapped and combined with the lower base unit 111, and the outer lower The hole 12 is formed at the bottom of the lower base unit 111 of the lower plate 11 and is exposed to the lower cladding unit 112, and the outer lower hole 12 is formed in the lower base unit 111 made of metal material, so the outer lower hole The portion 12 is also made of metal material. The outer lower hole portion 12 has a plurality of lower holes 14, and the two lower claw portions 13 are arranged at intervals on the top of the lower cladding unit 112 of the lower plate 11 and extend upward. And the two lower claws 13 are parts made of polymer material, wherein the surface of the two lower claws 13 is smooth.

As shown in Figures 2 and 3, the movable part 20 is disposed between the two lower claws 13 of the lower plate body 10, the movable part 20 is located above the lower plate 11, and the movable part 20 is in abutment The two lower claws 13, wherein the movable part 20 is a member made of polymer material and is a sphere, the lower plate body 10 is fastened to the bottom of the movable part 20 by the two lower claws 13 assembly, the The two lower claws 13 slide smoothly on the movable part 20.

As shown in Figures 2, 3, 7 and 9, the upper plate 30 is disposed on the top of the movable part 20 and abuts against the vertebral bone 40 located above, and the upper plate 30 includes an upper plate 31, An outer upper hole portion 32 and two upper claw portions 33. The upper plate 31 is located on the top of the movable part 20. The upper plate 31 includes an upper base unit 311 made of metal material and an upper package made of polymer material. Covering unit 312, the upper covering unit 312 is wrapped and combined with the upper base unit 311, the outer upper hole 32 is formed on the top of the upper base unit 311 of the upper plate 31 and exposed to the upper covering unit 312, and The outer upper hole 32 is formed in a metal material The upper base unit 311, so the outer upper hole portion 32 is also made of metal material, the outer upper hole portion 32 has a plurality of upper holes 34, the two upper claw portions 33 are arranged at intervals on the upper plate 31 The bottom of the upper cladding unit 312 extends downward, and the two upper claws 33 are parts made of polymer material, so that the movable part 20 is located between the two upper claws 33, and the two upper claws 33 and The two lower claws 13 are staggered and both abut the movable member 20. There is a movable gap 35 between the two lower claws 13 and the two upper claws 33. The two lower claws 13 and the upper plate 31 are separated from each other. There are a plurality of movable spaces 36 between the two upper claw portions 33 and the lower plate 11, wherein the surface of the two upper claw portions 33 is smooth, and the two upper claw portions 33 slide smoothly on the movable part 20 The upper plate 30 is fastened to the top of the movable member 20 by the two upper claws 33. As shown in FIG. 4, an upper recess 37 is formed on the rear side of the upper plate 31, and the upper plate 31 and the lower The outer contours of the plates 11 are the same.

In the above, the lower base unit 111 forms an inner lower hole portion 113 on the side opposite to the outer lower hole portion 12, the inner lower hole portion 113 has a plurality of lower coupling holes 114, and the lower covering unit 112 covers the inner lower hole portion 113. The lower hole portion 113 extends into the lower coupling hole 114. Through the configuration of the lower coupling hole 114, the bonding strength between the lower cladding unit 112 and the lower base unit 111 can be increased. The upper base unit 311 is An inner upper hole portion 313 is formed opposite to the outer upper hole portion 32. The inner upper hole portion 313 has a plurality of upper coupling holes 314. The upper covering unit 312 covers the inner upper hole portion 313 and extends into the inner upper hole portion 313. The upper bonding hole 314 also increases the bonding strength between the upper covering unit 312 and the upper base unit 311 through the configuration of the upper bonding hole 314. In addition, the lower base unit 111 and the upper base unit 311 can be blocked The polymer material prevents the polymer material from passing through the lower base unit 111 and the upper base unit 311, wherein the lower base unit 111 and the upper base unit 311 may be solid structures or porous structures with separation and blocking effects.

In the above, the polymer material used in the artificial intervertebral disc can be polyetherketoneketone (PAEK for short), and the PAEK series includes PEK (polyether ketone), PEEK (polyether ether ketone), and PEKK (polyether ketone ketone). , PEEKK (polyether ether ketone ketone), PEKEKK (polyether ketone ether ketone ketone), polyether ether ketone (polyetheretherketone, referred to as PEEK) in the PAEK series can be further selected, which is close to the sponge bone of the human body and can be anti-static.

As shown in Figures 3, 5, and 6, a preferred embodiment of the artificial intervertebral disc of the present invention is disclosed. The lower plate body 10 and the upper plate body 30 can be rotated back and forth, respectively. When the lower plate body 10 and the The upper plate 30 respectively rotates backward, and the upper claw 33 of the upper plate 30 at the rear side compresses one of the movable spaces 36 until the upper claw 33 at the rear touches the lower plate 11 of the lower plate 10 , The lower plate body 10 and the upper plate body 30 will stop rotating, which can provide the movement force of the two adjacent vertebral bones 40 to bend back and forth, and when the two upper claws 33 touch the lower plate 11 That is, the upper plate body 30 can be stopped from rotating, so as to prevent the lower plate body 10 and the upper plate body 30 from rotating and bending and not conforming to the bending of the human body. Similarly, it can be seen that when the lower plate body 10 and the upper plate body 30 When the plate body 30 can rotate left and right, the lower plate body 10 and the upper plate body 30 can provide the two adjacent vertebral body bones 40 with left and right bending activities. In addition, because the two lower claws 13 and the two The upper claw portion 33 slides smoothly on the movable member 20, and there is a movable gap 35 between the two upper claw portions 33 and the two lower claw portions 13, respectively, so that the lower plate body 10 can rotate relative to the upper plate body 30 The two upper claws 33 and the two lower claws 13 provide the rotation of the two adjacent vertebral body skeletons 40, so that the two vertebral body skeletons 40 can maintain the mobility of forward bending, backward bending, left and right bending, and rotation. .

As shown in Fig. 2, Fig. 7 and Fig. 8, a preferred embodiment of the artificial intervertebral disc of the present invention is disclosed. After the two adjacent vertebral bones 40 are emptied, the artificial intervertebral disc of the present invention can be used directly. The artificial intervertebral disc is implanted between the two adjacent vertebral body bones 40, the outer inferior hole portion 12 of the lower plate body 10 is in contact with the lower vertebral body bone 40, and the outer upper hole portion 32 of the upper plate body 30 In contact with the upper vertebral body 40, the outer inferior hole portion 12 and the outer upper hole portion 32 can provide appropriate friction, and the two vertebral body bones 40 will grow and extend into the lower outer inferior hole portion 12. The hole 14 and the upper hole 34 of the outer upper hole portion 32, the outer lower hole portion 12 and the outer upper hole portion 32 provide a better bone growth environment, and the two vertebral body bones 40 grow into the outer lower hole portion 12 And the upper outer hole 32, and then fix the artificial intervertebral disc between the two adjacent vertebral body bones 40. Compared with cutting a suitable buckle groove on the two vertebral body bones 40, the artificial intervertebral disc is created by this invention. Intervertebral discs can save more time and save complicated surgical steps, reducing the complexity of transplantation operations.

In addition, as shown in Figure 1, Figure 7 and Figure 8, because the artificial intervertebral disc is a composite member made of metal and polymer materials, it can prevent the material from being worn into fragments and flowing into the blood vessels of the human body, improving the safety of use The artificial intervertebral disc composed of a composite of metal and polymer materials, cooperates with the plurality of inferior holes 14 of the outer inferior hole portion 12 and the plurality of upper holes 34 of the outer superior hole portion 32, which can cushion the two adjacent vertebrae The upper and lower vertical impacts received by the body skeleton 40, the lower plate 11 is transplanted on the vertebral body skeleton 40, and the upper concave portion 37 of the upper plate 31 can avoid the nerve bundle 41 on the back side of the vertebral body skeleton 40, so as not to compress the nerve bundle 41 causes the symptoms of lower back pain, and the surfaces of the two lower claws 13 and the two upper claws 33 are smooth, the two lower claws 13 and the two upper claws 33 slide smoothly on the movable part 20, and then Moreover, the movable member 20 is a sphere, and the movable space of the lower plate body 10 and the upper plate body 30 is increased, which can improve the flexibility and mobility of use.

In addition, the lower hole portion provides a lower hole and the upper hole portion provides an upper hole to form a part of the blood of the parent bone, which helps autogenous bone growth. In addition, the artificial intervertebral disc can adjust the elasticity coefficient by changing the thickness and length, and the metal The difference in elastic coefficient between the different materials of the material and the polymer material can cause easy separation. The lower coupling hole 114 provided by the inner lower hole portion 113 and the upper coupling hole 314 of the inner upper hole portion 313 can be effectively increased. The bonding strength is not easy to detach.

To sum up, the artificial intervertebral disc of the present creation can be rotated back and forth, left and right, and relative to each other on the movable part 20 through the lower plate body 10 and the upper plate body 30, so as to provide the two adjacent vertebral body bones. 40 forward and backward bending, left and right bending and rotation, and the outer lower hole portion 12 and the outer upper hole portion 32 can provide proper friction, and provide a good growth environment for the two vertebral body bones 40, so that the outer lower hole portion 12 and the outer upper hole portion 32 can provide a good growth environment for the two vertebral body bones 40. The two vertebral body bones 40 grow and extend into the lower hole 14 of the outer lower hole portion 12 and the upper hole 34 of the outer upper hole portion 32, thereby fixing the artificial intervertebral disc between the two adjacent vertebral body bones 40, saving The time of the transplantation operation and the reduction of the complexity of the operation. In addition, the artificial intervertebral disc made of a composite of metal and polymer materials can prevent the material from being worn into fragments and flowing into the blood vessels of the human body, thereby improving the safety of use.

10: Lower board

11: Lower plate

12: Outer lower hole

13: Lower paw

14: Lower hole

20: Moving parts

30: Upper board body

31: Upper plate

32: Outer upper hole

33: Upper claw

34: upper hole

35: Activity gap

Claims (9)

An artificial intervertebral disc, which is arranged between two adjacent vertebral body bones and is a composite member made of metal and polymer materials. The artificial intervertebral disc includes a lower plate body, and the lower plate system resists the vertebral body located below A bone, the lower plate body includes a lower plate, an outer lower hole portion and two lower claw portions, the lower plate includes a lower basic unit made of metal material and a lower covering unit made of polymer material, the lower covering unit The outer lower hole is formed on the bottom of the lower basic unit of the lower plate and exposed to the lower cladding unit, the outer lower hole is made of metal material, and the outer lower hole is made of metal material. It has a plurality of lower holes, the two lower claws are arranged at intervals on the top of the lower cladding unit of the lower plate and extend upward, and the two lower claws are parts made of polymer material; a movable piece , The movable part is arranged between the two lower claws of the lower plate, the movable part is located above the lower plate, and the movable part abuts against the two lower claws; and an upper plate, the upper The plate body is arranged on the top of the movable part and resists the vertebral bones located above. The upper plate body includes an upper plate, an outer upper hole part and two upper claw parts. The upper plate is located on the top of the movable part. The upper plate includes an upper basic unit made of metal material and an upper cladding unit made of polymer material. The upper cladding unit is wrapped and combined with the upper basic unit, and the outer upper hole is formed in the upper plate. The top of the upper basic unit is exposed to the upper cladding unit, the outer upper hole is made of metal material, the outer upper hole has a plurality of upper holes, and the two upper claws are arranged on the upper plate at intervals The bottom of the upper covering unit extends downward, and the two upper claws are parts made of polymer material, so that the movable part is located between the two upper claws, the two upper claws and the two lower claws The two upper claws and the two lower claws respectively have a movable gap, between the two lower claws and the upper plate, and between the two upper claws and the lower plate. There are multiple activity spaces in between. The artificial intervertebral disc according to claim 1, wherein the lower base unit forms an inner lower hole portion on a side opposite to the outer lower hole portion, the inner lower hole portion has a plurality of lower coupling holes, and the lower cover sheet The element wraps the inner and lower hole and extends into the lower coupling hole. The upper base unit forms an inner upper hole on a side opposite to the outer upper hole, and the inner upper hole has a plurality of upper coupling holes. The upper covering unit covers the inner upper hole and extends into the upper combining hole. The artificial intervertebral disc according to claim 1, wherein the movable part is a member made of polymer material and is a sphere, the lower plate system is fastened to the bottom of the movable part by the two lower jaws, and the upper plate The system is fastened on the top of the movable part with the two upper claws. The artificial intervertebral disc according to claim 2, wherein the movable part is a member made of polymer material and is a sphere, the lower plate system is fastened to the bottom of the movable part by the two lower jaws, and the upper plate The system is fastened on the top of the movable part with the two upper claws. The artificial intervertebral disc according to any one of claims 1 to 4, wherein the surfaces of the two lower claws and the two upper claws are smooth, and the two lower claws and the two upper claws slide smoothly on the movable Pieces. The artificial intervertebral disc according to any one of claims 1 to 4, wherein an upper recess is formed on the back side of the upper plate, and the outer contour of the upper plate and the lower plate are the same. The artificial intervertebral disc according to claim 5, wherein an upper recess is formed on the back side of the upper plate, and the outer contour of the upper plate and the lower plate are the same. The artificial intervertebral disc according to any one of claims 1 to 4, wherein the polymer material used in the artificial intervertebral disc is polyaryletherketone. The artificial intervertebral disc according to claim 8, wherein the polymer material used in the artificial intervertebral disc is polyetheretherketone.

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