Biomedical subjects
Publications and source records attributed to G Felmet.
We report 3 cases of metal-backed patellar component failure of the Microloc total condylar knee, which was implanted in 51 cases. The main reason for failure was the design of the patellar and femoral components in combination with flexion of more than 100 degrees.
The following indications are well accepted for subtotal femur replacement: 1. Malignoma of the hip region. 2. Pertrochanteric fractures. 3. Loosening of hip prosthesis in case of large bony defects. The common devices are implanted by use of bone cement,--we report on three cases, treated by cementless subtotal femoral replacements with bony ingrowth surface. The surface design imitates the structure of spongious bone. The mean observation time of our three patients is more than two years, no complaints are to be observed. By intensive permeation of bone in the surface structure we achieve a more advantageous biomechanical situation.
Eleven patients treated for giant cell tumors between 1966 and 1988 were followed up. Excochleations, i.e., thorough curettage and filling with spongiosa, were performed as a primary procedure in nine cases. Of these, en-bloc excision with Juvara plasty and amputation of the distal portion of the lower leg were necessary in one case each a week after confirmation of malignant degenerations. The mean duration of follow-up was 10.5 years; two recurrences were found among seven excochleations and one among four excisions. Taking function disturbances and their avoidance into account, excochleation and spongiosa filling appear justifiable as a form of primary therapy.