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Online ISSN 1827-1707
96° CONGRESS OF THE PIEDMONTESE-LIGURIAN-LOMBARD SOCIETY OF ORTHOPEDICS AND TRAUMATOLOGY (SPLLOT) (Brescia, September 24-25, 1999)
BIOMATERIALS IN ORTOPEDICS: EXPECTATION AND CLINICAL PRACTICE
Dettoni A., D'Aleo P., Perrone V.
Background. Aim of the study is to evaluate, after 6 years, the outcomes of cementless total hip arthroplasty.
Methods. A retrospective study has been carried out on 100 uncemented total hip arthroplasty implanted consecutively in 92 patients from June 1992 to April 1994.
In all cases the CLS stem associated to the acetabular cup Harris-Galante (92 cases) and Dura-Lock (8 cases) has been implanted.
Results. The average Harris Hip Score (HHS) at one year was 96 and at 6 years was 93 demonstrating stability of the results. There were no cases of thigh pain nor postoperative infections or aseptic loosening but two patients had the revision of their implants for habitual posterior hip luxation.
Radiographic analysis, based on DeLee and Charnley criteria for the acetabular cup and on Gruen criteria for the femoral stem, showed equally good results. There was good initial stability of the cup and the metaphyseal portion of the stem; stems showed in some patients thickening of the cortex of the femur and proximal bone-stock loss in Zone I (75%) and Zone VII (55%). In acetabular cup bone-stock loss was seen in different way if we had used screw or not.
Conclusions. The conclusions is drawn that uncemented prostheses are a promising alternative to cemented prostheses for functional recover in absence of pain and for survival expectation of the implants.