Archives of orthopaedic and trauma surgery
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Man-made bone implant materials as substitutes for autogenic spongiosa transplantation are reviewed, specifically materials made from collagen. The intra- and extracellular biosynthesis of collagen is described. Manufacture, properties and indications of sterile Collagen-fleece, a well proven surgical biomaterial prepared from porcine collagen, is presented. Further research led to the development of a new bone-replacement material called Collapat.
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Arch Orthop Trauma Surg · Jan 1991
ReviewCircumferential fusion of the lumbar and lumbosacral spine.
Seventy-four patients with circumferential fusion of the lumbosacral spine have been assessed after a mean follow up of 49.8 months. For the ventral procedure, an anterior interbody fusion with tricortical iliac bone graft was performed. The additional dorsal fusion was according to various techniques with mainly transpedicular internal fixation. ⋯ The results favour the technique of a combined anterior/posterior approach for fusion of the lumbosacral spine in patients with instability and deformity of all three columns, such as fractures and spondylolisthesis of more than 50%. Optimal stability with satisfactory reduction of the deformity may be achieved. The one-stage operation proved to be superior, with less complications and a shorter hospital stay.
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Arch Orthop Trauma Surg · Jan 1991
ReviewTen-year results of tibial osteotomy for medial gonarthrosis. The influence of overcorrection.
The results in relation to the correction achieved 1 year after surgery of a series of tibial osteotomies in 50 patients (52 knees) are presented with a total observation time of 10 years. Mean age at the time of osteotomy was 56 years. ⋯ One out of 34 overcorrected knees recurred in varus. Five knees were revised by knee arthroplasty or reosteotomy one of which was overcorrected.
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Arch Orthop Trauma Surg · Jan 1991
Review Case ReportsNonunion of a comminuted intra-articular wrist fracture after external fixation. A case report and review of the literature.
Nonunion is a very rare complication of a comminuted intra-articular wrist fracture treated by external fixation. The authors describe the likely reasons and the after-care, in order to avoid this complication.
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Arch Orthop Trauma Surg · Jan 1991
ReviewSystemic effects of implanted prostheses made of cobalt-chromium alloys.
Systemic effects of Co-Cr alloy/polyethylene hip joint prostheses were investigated using instrumental neutron activation to determine the concentrations of up to 16 elements. First, in a prospective study whole blood and serum taken from 10 patients from 1 day before to 90 days after implantation were analyzed. Secondly, in a retrospective study whole blood and serum from 23 patients who had had prostheses in place for up to 18 years were analyzed. ⋯ The analyses of tissues from the vicinity of the implants in the two deceased implant patients showed strong local effects of Co, Cr, Zr, and Hf, the latter two elements originating from the X-ray contrast media in the bone cement. The analyses of organs revealed significant Co and Cr enrichment in several tissues and organs. Consequently, it can be seen that implant corrosion is not an occurrence of merely local significance, but one that affects the trace element status of the entire organism.