Methods and instruments for interbody fusion
A technology for driving tools and fusion devices, applied in the field of spinal anatomical implants, which can solve the problems of spinal imbalance, unacceptable, kyphotic deformation, etc.
Inactive Publication Date: 2008-10-15
SDGI集团有限公司
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Problems solved by technology
However, this method of over-reaming the posterior is generally not generally accepted due to the removal of the load-bearing bone in the spine and because it is generally difficult to ream the posterior portion of the lower lumbar region where the lordosis is greatest
In most cases where such implants are used, no effort is made to restore the lordotic arc, thus the cylindrical shape of the implant tends to induce kyphotic deformation as the vertebra stabilizes around the implant
This phenomenon throws the spine out of balance and often leads to reoperation
Method used
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[0032] In order to better understand the principles of the present invention, specific language will be used to describe the present invention with reference to several embodiments shown in the drawings. Nevertheless, it should be understood that this does not mean to limit the scope of the present invention. Those skilled in the art to which the present invention belongs will naturally anticipate the changes and further improvements of the device shown in the drawings, and the included therein Further application of the principles of the present invention.
[0033] Figures 2-5 illustrate an intracorporeal fusion device 10 according to one aspect of the present invention. The device consists of a rigid tapered body 11, which is preferably made of a biocompatible or inert material. For example, the main body 11 may be made of medical grade stainless steel or titanium, or other suitable materials with suitable strength characteristics. The device can also be made of a biocompatible ...
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The invention relates to a driving tool for embedding the body fusion device to the clearance between the adjacent vertebras. The fusion device is provided with a body which is provided with a cylinder outer surface cut by a flat side wall arranged relatively. The outer surface is provided with an outside thread. The tool comprises a lathy axle and a pair of corresponding clamps connected with one end of the axle through an articulated piece. The clamp is separated from each other. Every clamp is provided with a pair of inward surfaces contacting the flat side wall arranged relatively to the fusion device and a pair of outward surfaces coherent to the outer surface of the cylinder of the fusion device.
Description
[0001] This application was filed on March 26, 1996, with the application number 96105961.3 and the title of the invention as "in vivo fusion device and method for restoring the normal anatomical shape of the spine" as a divisional application. Technical field [0002] The present invention relates to an artificial implant used to be placed between the vertebrae in the void left after the injured intervertebral disc is taken out. Specifically, the present invention relates to an implant that can facilitate arthrodesis or spinal fusion between adjacent vertebrae while maintaining or restoring the normal spinal anatomy at a specific vertebral level. Background technique [0003] In the past few years, the amount of spinal surgery performed to eliminate factors that cause lower back pain has steadily increased. The most common situation is that the pain in the lower back is caused by injury or disease of the intervertebral disc between adjacent vertebrae. These discs may protrude or ...
Claims
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IPC IPC(8): A61F2/46A61B17/88A61B17/56A61B17/16A61B17/58A61B17/70A61FA61F2/00A61F2/28A61F2/30A61F2/44A61L27/00A61L27/22A61L31/04
CPCA61F2/442A61F2002/3085A61L31/047A61B17/8875A61F2220/0025A61F2002/3082A61F2002/30858A61F2310/00131A61F2230/0017A61F2/30744A61F2230/0004A61F2230/0067A61F2002/4641A61F2310/00095A61F2002/4475A61F2002/30874A61F2002/30143A61F2/4455A61F2002/30136A61B17/1671A61F2002/464A61F2002/30153A61F2002/30504A61L27/227A61F2002/30158A61F2002/3021A61F2002/30217A61F2310/00161A61F2310/00179A61F2002/30777A61F2002/448A61F2310/00017A61F2/4611A61F2/4637A61F2230/0019A61F2310/00023A61F2002/2835A61F2/446A61F2/30767A61F2230/0026A61F2002/30774A61F2310/00796A61F2002/30785A61F2002/305A61F2002/30593A61F2002/30873A61L2430/38
Inventor T·A·兹德布里克E·F·雷三世L·M·博伊德
Owner SDGI集团有限公司