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The anatomic pelvic parameter "incidence" – the angle between the line perpendicular to the middle of the sacral plate and the line joining the middle of the sacral plate to the center of the bicoxo-femoral axis – has been shown to be strongly correlated with the sacral slope and lumbar...
A first-generation implant for non-rigid stabilization of lumbar segments was developed in 1986. It included a titanium interspinous blocker and an artificial ligament made of dacron. Following an initial observational study in 1988 and a prospective controlled study from 1988 to 1993, more than...
The health of an intervertebral disc is based on a complicated interplay between physiology and biomechanics. The nucleus pulposus must remain well hydrated, and the surrounding anulus fibrosus must be competent in order for the disc to function properly. If either of these components fail, the...
The apparent clinical success of spinal stabilization methods that restrict rather than abolish movement in relieving mechanical back pain indicates that the concept of the aetiology of back pain should be reviewed. Further understanding of how degeneration affects disc biomechanics, and an...
The PDN prosthetic disc-nucleus device has been in use for 6 years, both in clinical trials and through commercial sale. Surgical and clinical data for the device have been collected and analyzed to help determine the strengths and limitations of the implant. The shape of the device has been...
Over the last 10 years, patient-oriented evaluations using questionnaires have become an important aspect of clinical spinal outcome studies. Any questionnaire must be translated and culturally adapted in order to be used with different language groups, and the translated version must then be...
Graf ligamentoplasty is seen as a means of stabilising and reducing the mobility of one or more severely symptomatic motion segments associated with degenerative disc disease. It is a less invasive procedure than fusion and appears to have a similar or slightly better success rate. Some studies...
In a large number of low-back pain patients, the pain is related to disc herniation or prolapse of the nucleus pulposus. Although the pathogenesis is still the topic of debate, the nucleus seems to play an important role not only in the progression of low-back pain, but also in its treatment....
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