[Long term results of total hip arthroplasty in patients with ankylosing spondylitis].

The results of total hip arthroplasty with the use of 5 different types of prostheses in 63 hips of 38 patients were presented. The range of follow up was from 7 to 14 years. The evaluation was done with the aid of M. d'Aubigné--Postel criteria and radiological assessment. Patients opinion and his ability to work was taken into consideration. The pain was reduced most significantly. Remarkable improvement was found in the gait and in the range of hip motion. In 24.5% of patients possible, probable or evident radiographic loosening was found. Ectopic ossifications of different degree were found in 38.8% of patients, mostly in hips previously operated on or severely destroyed. Ankylosing hips improved in movement to lesser extent. No deep infection was observed in early or late follow up.