Constant mineralization density distribution in cancellous human bone.

The degree of mineralization of bone matrix is an important factor in determining the mechanical competence of bone. The remodeling and modeling activities of bone cells together with the time course of mineralization of newly formed bone matrix generate a characteristic bone mineralization density distribution (BMDD). In this study we investigated the biological variance of the BMDD at the micrometer level, applying a quantitative backscattered electron imaging (qBEI) method.

[Replacement of the anterior cruciate ligament by cold preserved bone-cruciate ligament-bone allotransplants. An experimental study in the sheep].

One ACL in each of 17 mature sheep was replaced with a deep-frozen bone-an ACL bone allograft. Allografts were obtained from skeletally mature sheep using a standard aseptic technique and stored deep frozen for at least 6 days (mean 21 days). Macroscopical, biomechanical, and histological changes were evaluated 12, 24, and 52 weeks following implantation.

[Power stapling in trauma surgery. An improvement of trauma surgery technique?].

Power staple fixation of fracture fragments represent an enrichment of technological possibilities in adaptive osteosynthesis. We gained some experience with a variety of indications. The advantage of this method can be seen in the simple and fast way of application.

[Sonography of the skeletal muscles using high-frequency ultrasound probes].

8 musculi graciles of human cadavers were examined sonographically by means of high-frequency ultrasound probes (10 MHz) to evaluate the echo texture of skeletal muscles. It could be shown that the smallest structures of skeletal muscles that may be differentiated sonographically are the primary bundles. In addition, 100 patients with clinically suspected muscular trauma and 8 patients with neuromuscular diseases were examined via high-frequency ultrasound probes (10 or 7.

Fractures of the posterior tibial margin: their role in the prognosis of malleolar fractures.

One hundred forty-two patients with malleolar fractures were followed up for an average of 5.7 years postoperatively. In 80 cases (56.