Operation of the roof of the acetabulum were performed in 1959-1979 at the First Orthopaedic Clinic in Brno in 110 patients. The authors checked 66 patients with 70 roofs during a mean period of 23 years (11-31 years) after operation. The mean age of the patients at the time of operation was 20 years. Forty-two patients were operated at the age of 14-30 years. The authors recorded 25 good, 23 satisfactory and 20 poor results. Sixteen patients were subjected to another operation. Poor results were observed in hip joints with marked incongruence (severe dysplasia, postluxation necroses), in patients with a wrong indication (instead of the roof osteotomy of the pelvis according to Salter or Pemberton should have been performed) and in cases where the wrong technique was used (roof too short or high-set). The best results were obtained in the age group from 14-25 years. The authors recorded a favourable effect of the operation still 31 years after operation. In patients with obvious secondary arthrosis after 15 years no favourable effect was found. The authors discuss different types of roofs derived from the original method of Spitzy, the range of indications, as compared with Chiari's osteotomy and compare the results with those of other local authors.

1 ortopedická klinika FNsP Brno

Bosworth hip shelf arthroplasty in adult dysplastic hips: ten to twenty three year results