الفهرس 
IntroductionOnly 14 pages are availabe for public view
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Abstract
Arthrodesis usually is considered as a salvage surgery for joint disease because it fails to maintain the normal function of the joint. One of the reasons why arthrodesis of the disc joint has lasted so long is that, because of the multisegmental structure of the anterior column, it does not have as big an impact on a person’s function as the arthrodesis of the hip or knee. In addition, when judging the long-term results of interbody fusion, it often is compared with another nonphysiologic procedure with poor long-term results, discectomy. It has been long realized that the better solution for treating anterior column instability caused by degenerative disc disease is to reestablish the joint space and function with prosthetic disc replacement, instead of interbody fusion. By reestablishing the normal mechanical properties of the affected joint, it can maintain the normal stress distribution on the adjacent segments and therefore not accelerate their degeneration. The most common joint arthroplasty is to replace the entire joint. For intervertebral discs, a total disc prosthesis will replace the entire disc, including nucleus, annulus, and end plate. Similar to any interbody fusion device, the disc prosthesis should provide immediate support and stability of the affected joint and longevity. Therefore, short-term fixation and long-term stability are important to the success of a disc prosthesis.