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STUDY DESIGN Prospective randomized study. OBJECTIVES.: To compare the results of the combined anterior-posterior surgery (Group A) with posterior "short-segment" transpedicular fixation (SSTF) (Group B) in mid-lumbar burst fractures. SUMMARY OF BACKGROUND DATA There are no comparative randomized clinical studies on the outcome following operative(More)
BACKGROUND Authors of recent studies have reported early periprosthetic osteolysis in patients who have been treated with a contemporary metal-on-metal total hip arthroplasty and have suggested that metal hypersensitivity associated with an immunologic response to metal may be of etiologic importance. We evaluated the results and histologic findings in(More)
Delayed complications following lumbar spine fusion may occur amongst which is adjacent segment degeneration (ASD). Although interspinous implants have been successfully used in spinal stenosis to authors’ knowledge such implants have not been previously used to reduce ASD in instrumented lumbar fusion. This prospective controlled study was designed to(More)
This is a prospective comparative histological study on blood supply between lumbar herniated discs and postmortem retrieved ones. The aim of this study is to observe the evolution of disc degeneration in relation to its blood supply changes. Disc vascularization is present early in life, but the nucleus pulposus becomes avascular after adolescence.(More)
STUDY DESIGN A prospective study conducted on several roentgenographic parameters of the standing sagittal profile of the spine in an asymptomatic Greek population. OBJECTIVES To perform segmental analysis of the sagittal plane alignment of the normal thoracic, lumbar, and lumbosacral spines and to compare the findings with those derived from similar(More)
STUDY DESIGN Prospective consecutive series. OBJECTIVE To evaluate the outcomes of the treatment of acute thoracolumbar burst fractures by transpedicular balloon kyphoplasty with calcium phosphate cement and posterior instrumented fusion. SUMMARY OF BACKGROUND DATA In the surgical treatment of thoracolumbar fractures, the major problem after posterior(More)
STUDY DESIGN Prospective comparative randomized clinical and radiologic study. OBJECTIVE This study was conducted to compare the short-term effects of rigid versus semirigid and dynamic instrumentation on the global and segmental lumbar spine profile, subjective evaluation of the result, and the associated complications. BACKGROUND DATA Lumbar spine(More)
To assess the adaptive bone changes in adult human hips after insertion of cemented or uncemented acetabular and femoral components for total hip arthroplasty, a retrospective clinical study using dual energy xray densitometry was conducted. A consecutive homogeneous group of 52 female patients with an average age of 61 years was operated on for unilateral(More)
STUDY DESIGN Prospective controlled cohort study of 27 adult osteoporotic patients who underwent kyphoplasty for fresh osteoporotic spinal fractures. OBJECTIVES To define the evolution of vertebral bone mineral density (BMD) at kyphoplasty and adjacent levels along with sagittal spinal alignment to contribute to the etiology of adjacent vertebral(More)
STUDY DESIGN A retrospective study was conducted of patients with untreated adult-type idiopathic lumbar scoliosis. OBJECTIVES To construct a mathematical formula that provides accurate progression of an idiopathic adult lumbar scoliosis using initial roentgenographic parameters. SUMMARY OF BACKGROUND DATA Osteoporosis, lateral spondylolisthesis of(More)