WO2006066465A1 - A fusion implant for lumbal intervertebral columns - Google Patents

Abstract

A fusion implant for lumbal inter-vertebral columns has a body (4) which is made from fresh and healthy mammiferous bones. The body has a shape of frustum. On the two conical side of the body are arranged projecting teeth (1). On the two planar sides of the body are made two or more through holes (3). There is a lengthwise groove (2) on the end of each planar side of the body towards the upper underside.

Description

 Lumbar interbody fusion cage

Technical field

 The invention belongs to the technical field of medical bone tools.

Background technique

 In orthopedic medical practice, the instability of the spine occurs after removal of the lumbar disc herniation, or the degenerative lumbar disc disease is unstable, or the ΐ", π" spine slippage, etc., often placed between the vertebral bodies made of metal material The internal fixation bracket - Cage for treatment. For example, TFC and BAK, which were popular several years ago, have small bearing surfaces, which cause complications such as sinking and slippage after filling the bone, and are inconvenient to install. Recently, the contact Fusion Cage (such as TELAMON, OIC- Titaniunu OIC- Peek) has been popular. ) replaced. However, both the former and the latter, all of these internal fixations are almost foreign bodies of metal frame structure, and the polymer of the polymer has a faster degradation of 0IC-PEEK, and the frame is filled with bone graft, so it is considered to be not ideal. .

Summary of the invention

 It is an object of the present invention to provide a fixation cage that acts both as a support fixture between the vertebral bodies and as a bone graft between the vertebral bodies.

 The technical solution of the present invention is a lumbar interbody fusion cage, see Fig. 1-2, having a body 4, which is made of fresh and healthy mammalian bones, and is made of fresh and healthy mammalian bones. The body 4 has a vertebral shape, and the convex surfaces 1 are respectively disposed on the two sides of the main body 4. The two sides of the main body 4 have two or more through holes 3, and the two sides of the main body 4 have a strip-shaped recess 2 at one end of the upper bottom surface. .

The lumbar interbody fusion cage of the present invention is taken from a fresh and healthy mammal The bone is machined into a vertebral shape as described above, see Figure 1. The section is in the shape of a 'work' shape, see Figure 2. The front end of the body of the cage is smooth and streamlined, so that the implant resistance can be reduced to avoid nerve damage. The convex surfaces on the two sides of the body are respectively distributed with the convex teeth 1 and can be engaged with the upper and lower end plates. The finished lumbar interbody fusion cage can be used after sterilization. The lumbar interbody fusion cage has greater mechanical strength and can be used for support fixation and fusion between the posterior lumbar vertebrae. The bone connector made of bone material has non-toxic, non-carcinogenic and non-allergic reactions, has good compatibility with human tissues, can slowly absorb and fuse, and is convenient to install with special tools, so it can be considered as an ideal. L1~S 1 posterior interbody fusion cage.

 When the finished product of the present invention is put into medical use, the following manner can be followed. After the disc is removed, the cartilage surface of the vertebral body is cleaned, and the cage 2 is clamped by a special cage clamping clamp, and the cage is transversely fed into the intervertebral space. Note that the position is appropriate, and then rotate 90" to make the fusion force The beam supports and closely contacts the endplate of the vertebral body, and exits the clamping jaw. The structure of the cage with the convex teeth of the cone makes the friction increase and close tightly, so it does not withdraw with the holder. The function of the through hole on the cage It is convenient for the autologous bone to grow in the future to facilitate bone fusion.

 It should be noted that a lumbar interbody fixation fracturing machine comprising both the same and xenogeneic bones should fall within the scope of the present invention.

 The invention adopts bone tissue as a material, has no immunogenicity, has high compressive strength, has high mechanical properties and image compatibility, and is suitable for support fixation and fusion between the posterior lumbar vertebrae.

 The invention is convenient to take materials, safe and reliable in quality, and easy to install and apply. The replacement of metallic materials with biological materials is in line with the physiological needs of human body.

Claims

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic structural view of a lumbar interbody fusion cage according to the present invention. Figure 2 is a cross-sectional view taken along line A-A of Figure 1; In the above figure 1-2, a convex tooth 2 - a groove 3 - a through hole 4 - a body embodiment 1 : This example uses bovine bone skeleton tissue as a material, plane and milling to make a height of 25 mm, the bottom surface The length is 14 flat, the upper base is 10 inches long, and the platform body 4 is 10 mm thick. The groove diameter is Φ 6ΜΙΙ. The cross section at the groove is in the shape of an I-shape. The two sides of the facet are respectively milled into a facet with a convex tooth 1, and the convex teeth 1 are evenly arranged, and then two through holes 3 are formed in the plane of the body 4, and the diameter L is Φ 5ιηιη. Example 2: This example uses porcine bone and bone tissue as the material, which is made by planing and milling to make a height of 20 hidden, the lower bottom surface is 9 brains, the upper bottom surface is 7 inches long, and the thickness of the 7 mm-sized vertebra-shaped body 4 is the groove groove diameter Φ. 1⁄2ηι. The cross section at the groove is in the shape of an I-shape. The two sides of the facet are respectively milled into a facet with a convex tooth 1, and the convex teeth 1 are evenly arranged, and then two through holes 3 are formed in the plane of the body 4, and the aperture Φ 3 ΙΉΠΙ. The thus constructed lumbar interbody fusion cage of the present invention has been proved to have a good overall effect, reliable quality, safety and practicability, and remarkable curative effect. Rights request  A lumbar interbody fusion cage having a body (4), wherein the body (4) is made of fresh and healthy mammalian bones, and the body is made of fresh and healthy mammalian bones (4) In the shape of a vertebral table, the convex surfaces (1) are respectively distributed on the two sides of the body (4), and two or more through holes (3) are formed on the two sides of the body (4), and the planes on both sides of the body (4) face the upper bottom surface A strip groove (2) is opened at one end.