[Alkaptonuria and ochronotic arthropathy. Arthroscopic and intraoperative findings in implantation of a knee joint surface replacing prosthesis].

Alcaptonuria is a rare (incidence approx. 1:10(6)), autosomal-recessive transmitted metabolic disease. The basic defect is a lack of the enzyme homogentisic acid oxidase.

[Endoprosthetic replacement of the metatarsophalangeal joint of the big toe].

The article reports on 20 cases of cup-plasties of the first metatarsophalangeal joint. 13 cups were done without, 7 with bone cement. The early results in both groups were promising.

Patella glide bearing total replacement.

The technical procedure and results with the author's patella glide bearing total prosthesis is reported. The endoprosthesis is made of polyethylene on the patellar side and a cobalt-chrome alloy on the femoral side. It can be applied solely or in connection with intramedullary total endoprostheses and also in combination with sled-type endoprostheses.