The indication for nailing a femur or tibia fracture has been extended by the method of interlocking up to the meta/diaphyseal zone. For the stabilization of osteotomies in these regions, the nail was used in 16 cases of femur and 21 of tibia corrections between 1982 and 1986 in orthopedic university clinic Berlin. The osteotomies were done with a small skin incision in open way. Although there were three infections bone consolidation was succeeded in all but one patient with the planned axis. The first achieved gain in length could not be hold in five cases after removing the interlocking screws in order to give full weight bearing to the leg for callus formation. In situations of non-unions with wrong position of refracture of biologically troubled bones after plating the method of interlocking nail is stable and enables bone recovery after grafting by drilling. The possibility of early full weight bearing is a great advantage for the rehabilitation of patients, who had been suffering of the delayed healing of their leg. The nail itself preserves the right position of the bone in two dimensions, even if there are not exact fitting osteotomy fragments, and the interlocking screws secure the bone against malrotation.

Adolescent↗

PubMedDate not supplied

[Effect of a constructive change in the Charnley total hip endoprosthesis on its permanent stability in the bone].

Because of long experiences with cemented hip joint prostheses and the simple geometric form of this joint shape and material of those prostheses are nearly established. Therefore, success of different systems is measured by duration of stabile fixation in the bone. A minor modification of the acetabular cup is able to improve this duration of stability. The cup has a additional central cone which will be wedged firmly in a centering hole, drilled in the acetabulum. In a longtime follow-up study of 1004 operated patients - medium observation time 7.8 years - the cup loosening rates are only 2.6%. The biomechanical basis of the value of the central cone is discussed.

Aged↗

PubMedDate not supplied