B-vitamin supplementation had no consistent effects on bone turnover or BMD. However, the situation may be different in patients with hyperhomocysteinemia.

In this study the function of the knee measured at a medium-follow-up of 5-6 years was correlated with influencing factors concerning the implant of total condylar knee prosthesis in 90 patients. The only variable affecting postoperative extension was the preoperative range of extension whereas postoperative flexion was influenced by the preoperative flexion, valgus deviation of the preoperative AP tibial-femoral angle, position of the patella, and thickness of the resection of the distal femur cut.

Femoral anteversion, anteversion of the acetabulum and tibial torsion of 47 patients with idiopathic osteoarthritis of the hip were determined by computerized tomography. From all these parameters only the anteversion of the acetabulum showed differing values in hips with and without osteoarthritis. There was a considerable range at the individual measured values in all parameters and differences between the male and female groups could be found in femoral anteversion and anteversion of the acetabulum.

Experimental and clinical investigations of fractures of the head of the tibia by computed tomography are described. CT provides much information which is of significance for treatment. In particular, it demonstrates the size of fragments, of defects and areas of compression more clearly than does conventional radiography.

A series of 90 patients, 85 males and 5 females, all with ACL-ruptures had a follow up between 5 and 12 years. All of them had a primary arthrotomy with or without meniscectomy but in no case an operative repair of the ACL-rupture was done. The most concomitant injury was a torn medial meniscus in 76.3%, a damaged lateral meniscus was found in 17.1%, chondromalacia was seen in 53%, either of tibia, femur or patella. Nearly 60% of the patients could resume their former sports activities in some cases on a lower level, whereas 33% had to change their sport or even had to give up any sport. 75%-80% of the patients with partial or total meniscectomy and 90% of those without meniscectomy estimated the outcome as good or fair. In contrast to this 61% rsp. 86% of the patients with partial or total meniscectomy had an osteoarthritis of grade III and IV, patients without meniscectomy in only 23%.