Archives of orthopaedic and trauma surgery
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A case is reported of spontaneous rupture of the biceps femoris muscle, a hitherto undescribed condition. A characteristic history is discussed and a new clinical sign described.
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The spontaneous degeneration of the human rotator cuff seems to have mechanical and nutritive causes. Until now it was not known whether other species without an acromion had a vascularization of the rotator tendons which is similar to that of man. ⋯ Most important is the fact that the supraspinatus tendon shows an area of hypovascularity close to its insertion. Thus, the dog may be used for experimental purposes relating to the rotator cuff.
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Arch Orthop Trauma Surg · Jan 1990
Comparative StudyComparison between straight- and curved-stem Müller femoral prostheses. 5- to 10-year results of 545 total hip replacements.
Between 1977 and 1982, 545 cemented femoral prostheses were implanted, in combination with a noncoated cementless polyethylene acetabular component (RM cup). Three hundred and eighty-one straight-stem and 76 curved-stem Müller femoral components were implanted, as well as 88 collared components with a 130-mm stem and a 130 degrees neck-shaft angle, derived from a long-stem steel prosthesis. Survivorship analysis of revisions for aseptic loosening at 10 years revealed 97% straight-stem survival, 91.6% curved-stem survival, and 88.3% 130 degrees stem survival. "Survival" curves were also constructed for radiological loosening, and the survival rates (patients without radiological evidence of loosening) were 69.8%, 78.8%, and 63.1% respectively at 10 years. ⋯ This resulted in less calcar resorption, but there was a higher rate of stem loosening. Acetabular loosening and associated wear products appear to be responsible for calcar resorption, and stress shielding of the calcar appears to be of minor importance in the pathogenesis of aseptic stem loosening. Better cementing techniques have improved survivorship of the curved-stem prosthesis, and early fears of high rates of radiological loosening with the straight stem have not been substantiated.
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Arch Orthop Trauma Surg · Jan 1990
Quantitative and functional restorations and alterations of peripheral lymphocytes in patients with autologous spleen implantation.
To reduce the risk of severe infections in splenectomized patients, new methods for splenic preservation or heterotopic autologous spleen implantation have been established. In the latter case, the immunological and functional benefits are still under discussion. In this study we compared immunological parameters in 16 splenectomized patients with and without heterotopic autologous spleen implantation with a nonsplenectomized control group. ⋯ The latter results support the findings of elevated serum IgA levels in this group. The mitogenic-induced proliferation with PHA, ConA, PWM, and OKT3 was not clearly different within the tested groups. The results may indicate a benefit of autologous spleen implantation in regard to the humoral immune response.
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Arch Orthop Trauma Surg · Jan 1990
Open fractures of the femur treated by the pin-in-plaster technique. Contribution to the art and practice of trauma surgery in the Third World.
In order to cope with the frequent lack of adequate and sufficient external fixator systems in Third World countries, the pin-in-plaster technique was adopted and used in the management of open fractures of the femur. It consists of the use of Steinmann and Schanz pins incorporated into a plaster of Paris cast. ⋯ The advantages and disadvantages of the method are discussed. The method is recommended as an effective improvisation of the Hoffman apparatus for use in exceptional circumstances, such as war and adverse socioeconomic conditions as are found in most Third World countries.