Purpose: The use of femural head as an autograft in the reconstruction of dysplastic acetabulum is a fast, convinient and with excellent results throught time.

Materlal-method: Since January 1986 until December 2002, 57 total hip replacements had taken place for dysplastic acetabulum. In all of them, the femural head has been used as an autograft. The age of the patients was between 42 to 75 years old (m.a. 63 ñ.Ï.). 45 of them were females and 12 males. 9 patients have been suggested to intertrïchanderic osteotomy in the past. One third of the patients had also the other hip affected. The surgical approach to the hip in all cases was made by the Harding’ s techique. The autograft in received from the femural neck. We prepared the acetabulum until we had bleeding bone. The bone graft is beared with two screws and if any gup exist is filled with cancellous autografts. In 41 operations of total hip replacements the cup was fixed with cement and in the rest 16 without. In our research we have included 43 hips with a follow-up from 3 to 14 years (m.a. 8,5 y.o.).

Results: The results were evaluated with the Merle d’Aubigne and Postel scale. 5.6 pain, 4.1 wirdth of mobility. The callousness and the remodeling of the autograft were coplet in x-rays control. Íï case of absorbe of the bone graft. Until now no artrhoplasty has been revised.

Conclusions: We consider that this is a satisflng method for filling and supporting the cup and in adittion it offers advantages in case that the artrhoplasty has to be revised.

Purpose: The barrel – vault tibial osteotomy by Maquet proves to be a solution when dealing with osteoarthritic knees in varus deformity in young adults.

Material – method : 60 knees from 60 patients operated from January 2000 until October 2002. 50 of them where females 52 –72 (m.a. 59 y.o.),(35 right knees and 15 left knees) and 10 males 48 –72 y.o. (m.a. 56 y.o.),(7 right knees – 3 left knees).

The type of operation in which they were subjected was barrel – vault tibial osteotomy (Maquet’s technique) and stabilization of the tibial with a particular external fixation system (STAR) for tibial osteotomy. The stability of the fixation with this system was proved to be absolutely satisfactory and permits immediate mobilization of the patient’s knee and of the patient himself. The entire system is removed 8 weeks post- operatively.

Results : All patients have been improved both from the point of mobility and subjective complains.

Conclusions : The use of the STAR external fixation system for the tibial osteotomy creates tibial stability which allows the immediate post – operative mobilization both of the suffering knee and of the patient as well.