Abstract
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.
The abstracts were prepared by Eleni Koutsoukou. Correspondence should be addressed to him at the Hellenic Association of Orthopaedic Surgery and Traumatology (HAOST), 20, A. Fleming str, 15123 Marousi, Athens, Greece.
