PubMed Health⌕ Search

Biomedical subjects

B G Weber

Publications and source records attributed to B G Weber.

At least 19 recordsLinked to original sources
PubMed2002

[The history of Metasul].

The first generation, metal-on-metal articulation from cobalt-chromium-molybdenum alloy produced by Sulzer Ltd. has been in use for 40 years. Former drawbacks concerning geometry, tolerance or metallurgy have been eliminated in the second generation METASUL components used since 1988. These are also free of disadvantages, such as potential fracture, shown by other hard-on-hard bearing couples. For 14 years now METASUL components have not been responsible for any repeat operation due to loosening. Both clinical and experimental outcomes show that yearly wear has been negligible (in the order of microns) and this allows us to expect the metal-on-metal coupling to function for periods not a achieved so far by any other hip prosthesis. Hip replacements based on METASUL are better than those involving metal-on-polyethylene or ceramic-on-polyethylene. Up to now the need for repeat operations has not been associated with the MATASUL coupling system. Loosening has always been due to other reasons. It can therefore be expected that, in choosing prosthetic devices and surgical techniques, METASUL hip replacements will play a leading role.

Arthroplasty, Replacement, Hip↗
PubMed1996

Experience with the Metasul total hip bearing system.

The author and Sulzer Medical Technology Ltd, Switzerland, have developed a new generation of metal on metal bearing total hip joints. The design is different than the McKee type prostheses in that the cobalt chrome alloy heads and cups (Metasul) are of the highest precision with controlled loose fitting. These allow low friction and low wear of approximately 5 micrometers per year. It is anticipated that debris related late loosening will be avoided by the use of this design. Approximately 30,000 Metasul hearings have been produced. The first 110 Weber metal on metal hip implants have been analyzed. No adverse effects from the wear of the new metal on metal components have been noted in this series.

Adult↗
PubMed1995

[Total hip prosthesis with metal-on-metal slide matching--current developments based on long-term observations].

The first metal-on-metal artificial hip joints of the sixties (for example that of Mckee, Norwich) were soon replaced by models with polyethylene acetabular cups because of several shortcomings. 20 years later, however, a few patients were seen where such metal-to-metal joints still performed very well. Closer investigations revealed that with improved machining and a more perfect fit the failures of the first series could be eliminated and that these models were much less prone to wear than the ones using polyethylene. The author has developed and inserted such new prostheses, with good success so far.

Corrosion↗
PubMed1993

Wave plate osteosynthesis as a salvage procedure.

The load axis of the curved-shaped proximal femur lies not inside, but outside the bone. Therefore high bending forces are acting, the medial cortex absorbing pressure, the lateral cortex absorbing tension. In a transverse fracture, a laterally applied plate will absorb the tensile stresses, the medial cortex the pressure forces. When medial butress due to bony defect is missing, the laterally applied plate is subjected to cycling bending and will undergo fatigue fracture. This dilemma is compensated by a wave-plate with bone graft: The compression forces are detoured to the lateral cortex and the plate is again subjected to tension. Furthermore since the plate is standing away from the bone, the plate does not disturb the blood supply at the fracture side and bone healing.

Adult↗
PubMed1993

Total hip joint replacement using a CoCrMo metal-metal sliding pairing.

Late loosening in total hip replacement is explained by a foreign body reaction of the connective tissue along the bone-implant interface due to polyethylene debris. In contrast, metal-metal prostheses of the McKee type implanted in the sixties, may still work perfectly today without any signs of osteolysis along the bone-cement interface, proving that metal-metal pairing is superior to prostheses with polyethylene cups and proving also that cement anchorage may be adequate for fixation. A new metal-metal total hip joint is presented, that has been implanted 90 times between 1988 and 1991.

Chromium Alloys↗
PubMed1990

Wave plate osteosynthesis as a salvage procedure.

The load axis of the curved proximal femur lies not inside but outside the bone. Therefore, high bending forces are acting, the medial cortex absorbing pressure and the lateral cortex absorbs tension. In a transverse fracture, a laterally applied plate will absorb the tensile stresses and the medial cortex, the pressure forces. When the medial buttress due to a bony defect is missing, the laterally applied plate is subjected to cyclic bending and will undergo fatigue fracture. This dilemma is compensated by a wave plate with bone graft: the compression forces are redirected to the lateral cortex, and the plate is again subjected to tension. Furthermore, since the plate stands away from the bone, it does not disturb the blood supply at the fracture site and thus bone healing.

Adult↗
PubMed1990

The dorsal antiglide plate in the treatment of Danis-Weber type-B fractures of the distal fibula.

The results of 93 of 107 consecutive antiglide plate internal fixations of Danis-Weber Type-B fractures of the distal fibula are reported with a follow-up period of just over one year. Using the ankle evaluation scale of Weber, 66.7% excellent, 27.9% good, and only 5.4% poor results were found. The method of dorsal antiglide plate fixation is possible in most of the frequent Type-B ankle fractures. Stabilization is better with the antiglide plate, especially in older patients with osteoporotic bone. Because of these advantages and the biomechanically sound technique, the antiglide plate is recommended for stabilization of the Danis-Weber Type-B fracture of the distal fibula.

Ankle Injuries↗
PubMed1990

[Femoral shaft fractures in childhood. 25-year experience using Weber's table].

25 years ago a new type of skeleton traction was introduced by B.G. Weber (Webertisch), allowing easy control and reduction in all planes of the fragments of femoral shaft fractures in children. Since 1961 329 shaft fractures were treated at our hospital; 215 by the Webertisch method, 33 with other types of traction and 81 needed to be operated on. From 1961 through 1973 the number of Webertisch treatments was higher than in the period from 1974-1987 (182 resp. 147); but in the second period there were more children with complex and severe injuries and more children older than 10 years needed to be operated on. The method proved to be save and easy to handle and no modifications took place.

Adolescent↗
PubMed1989

[Polyethylene wear and late loosening of a total prosthesis of the hip joint. New perspectives for metal/metal pairing of the capsule and head].

Twenty-nine years' experience with total hip replacement surgery, including continuing quality control and follow-up studies, indicate that late loosening after 10-15 years is related to wear of the polyethylene cup. Metal-to-metal prostheses implanted 20 years ago and longer, on the other hand, show no signs of wear or loosening. In conclusion, polyethylene does not last long enough when compared to biocompatible precision-made artificial metal-metal hip joints.

Biocompatible Materials↗
PubMed1988

Surgical management of tumor-related limb fractures.

Tumor-related fractures require internal rigid fixation with adapted surgical techniques in accordance with the altered bone quality. Internal fixation results in relief of pain and restoration of function, i.e., in walking capacity in the case of leg fractures and manual action in the case of arm fractures. Restoration of pain-free function in the case of tumor-related fractures is therefore an important part of the treatment of tumor patients.

Bone Neoplasms↗
PubMed1988

Pressurized cement fixation in total hip arthroplasty.

In a follow-up study of 108 total hip arthroplasties, the 92% excellent and good results after seven to 11 years of implantation are evidence in support of cement fixation. The precision of the cementing technique is essential for a high percentage of successful results after ten or more years. Restricted reaming, brushing and lavage to remove debris, use of high-viscosity cement, and pressurization of the cement are of paramount importance.

Arthroplasty↗
PubMed1985

Corrective lengthening osteotomy of the fibula.

Widening of the ankle mortise following fracture can be a subtle diagnosis requiring special radiographs to fully appreciate the extent of shortening and rotation of the fibula. Once this fibular shortening has been recognized, a lengthening and rotational osteotomy can be conducted with use of a special compression/distraction device and bone graft. A series of 23 cases demonstrates that reconstructive lengthening osteotomy is well worthwhile when there is absent or minimal osteoarthritic change, irrespective of the time from the original injury.

Adult↗
PubMed1985

Operative treatment of displaced talus fractures.

The talus is a bone with unique biomechanical features and vascular supply. Displaced fractures of the talus, therefore, frequently create problems of proper management. Forty-one severe talar fractures were treated operatively. The incidence of avascular necrosis was relatively low in this series (16%), and all of these were of Type III and IV fractures of the Marti-Weber classification. Type IV fractures were successfully treated by arthrodesis per primam, and suggested that fusion may be the indicated method of treatment in these severe injuries. Fusion of the tibiotalar joint has been used to encourage revascularization and to preserve the important function of the subtalar joint. In all other fracture types with dislocation, anatomic reduction is performed to restore joint congruity and encourage maintenance of talar dome viability. Painstaking postoperative management is important for the complete restoration of function.

Adolescent↗