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.

[Surgical management of dislocated patellar fractures--therapy and results].

Between 1976 and 1985, 96 patients with 97 fractures of the patella have been operated at the 2nd Department of Trauma Surgery, University of Vienna. According to the radiographs the fractures were classified in nine apical fractures (9.3%), 34 transverse fractures (35.

Modulation of the migration and chemotaxis of PMN cells by hyaluronic acid.

Hyaluronic acid (HA) has a dose-related inhibiting effect on the migration and chemotaxis of polymorphonuclear leucocytes (PMN) in vitro. These effects were measured with a new indirect quantitative assay. On average 1 mg HA/ml causes an inhibition to about 80% of the control (spontaneous migration).

[Percutaneous embolization of retroperitoneal hemorrhages in pelvic fractures].

Pelvic fractures may lead to severe retroperitoneal bleeding. Percutaneous catheter embolisation has become an increasingly important therapeutic alternative to surgical intervention. Most studies dealing with this problem have been small and we have attempted to evaluate the method on the basis of our own experience and a review of the literature.

[Treatment of flake fracture of the talus].

This is a report on 18 osteochondral lesions of the talar dome after sprained ankles and ruptured lateral collateral ligaments of the ankle. They were classified according to Berndt & Harty. The treatment of choice in recent flake fractures is the reduction and glueing with fibrine.

[Treatment of fresh subcutaneous flexor tendon rupture of the distal joint of long fingers with temporary bone wire arthrodesis].

Drop-finger at the distal joint or mallet-finger from injury occurs because of the extensor apparatus is so much weaker than the flexor tendon that it breaks under strain. We report on 100 cases treated by internal splinting with longitudinal applied Kirschner wire in the distal and middle phalanx of the finger. It affords an absolute immobilisation of the distal interphalangeal joint in slight hyperextension with relaxation of the extensor apparatus.

[Experiences using the rotation femur head prosthesis in the treatment of medial femoral neck fractures in geriatric patients].

We report upon 167 fractures of the medial femoral neck (166 patients aged 82 years on average) that were treated by hemialloarthroplasty (trunnion hip prosthesis Allo-Pro). 94 patients were followed-up from three to 53 months (average 18 months) postoperatively. 67 patients regained their full physical activity.

[Conservative therapy of forearm fracture in the growth stage with special reference to the correlation of roentgenologic course, objective and subjective total results].

143 out of 310 patients in the age of one to 18 years suffering from forearm-shaft-fractures could be followed up at the 2nd Department of Traumatology, University of Vienna, out of a period between 1978 and 1983. A correlation between radiologic follow-ups and objective/subjective findings was achieved by means of the WAMASTAT/SAS program at the Institute of Medical Computer Sciences. With the aid of computer diagrams of the angulation of fracture-dislocation awaited restrictions of movement can be anticipated.