Surgeon who used the uncemented cup must choose between two kids of cups: the porous coated (press fit) and the threaded. Many authors present several discouraging results. Nevertheless satisfactory results have also been obtained using threaded cups and the explanation lays in the design the alloy and the surface characteristics of the acetabular component.

We describe the clinical and radiological outcome of 93 THA in 81 patients using a screw-in cup (Link- type) performed between 1994–2000. Our follow-up time was and the average age of the patients was 68y,all were primary THA(78 OIA,15 sub-capital fractures).Clinical evaluation was perfomed using the Merle d’ Aubigne hip score.

Results: We had good results in 90,3%. Migtation of 2mm of the treaded ring was present in 9 (nine) THA. Although only one has been revised up to now the future of the others remain uncertain. There was no revision of the femoral stem but we had one septic loosening.

Conclusion: Our findings suggest that long-term fixation of a treaded cup in primary T’HA was satisfactory if there aren’t present any migration factors like osteoporosis whatever the etiology (in these cases we must put an over-size cup) and a wrong primary position. We believe also that the design of the Link-type treaded cup with this depth-extension space of the treads and the absence of the bottom hole is related with our good results.

Introduction: Primary fixation of displaced sub-capital fractures with low morbidity and low mortality offers an approach to a very common problem. The vast majority of patients receiving this form of treatment will not require further surgery. When confronting with the problem of primary arthroplasty which includes a higher morbidity and higher mortality, a higher infection rate and the possibility of prosthetic loosening especially in young patients, the choice seems clear.

Material and method: Between 1995 and 2000, a series of 21 patients (15f, 6m) were admitted for a displaced subcapital fracture (16 type Garden III, 5 type Garden IV) to our clinic. All the patients were operated 24 to 36 h after admission.

The mean age was 48y. The technique consists of:

Anatomic reduction (with a C-arm), which was the most crucial point of the technique.

Results: The mean follow-up was 34 m. We did not have any osteonecrosis of the head. No complications. The mobility of the hip was normal in all patients. There were two cases with delayed union and one case with non-union due to a distention at the site of the fracture after the reduction_

Conclusion: We believe that this technique, especially the combination of an anatomic reduction of the fracture and the use of a cancelocortical graft is a very prospective alternative to a prosthetic replacement in relatively young patients.