Abstract

CAMACHO, António et al. Resultados da utilização de implantes de tântalo poroso em cirurgia de revisão acetabular. Rev. Port. Ortop. Traum. [online]. 2013, vol.21, n.1, pp.17-25. ISSN 1646-2122.

The acetabular bone defects increase the complexity of the hip revision surgery by limiting the position of the acetabular components. Also, they may decrease the host bone contact área, compromising the primary stability of the implant. There is a growing body of information that suggests the usefulness of porous tantalum implants in situations where there is an acetabular bone defect, since this material has characteristics that increase primary stability and enhance osteointegration. The primary objective of this work is to evaluate, using standardized radiographic measures and validated clinical scores, a series of patients submitted to a revision hip surgery using porous tantalum implants. Between November 2005 and March 2011, 27 revision hip surgeries were performed by a single surgeon, (PD), using the porous tantalum implants. Twenty two percent (6 cases) were type IIIa of the Paprosky acetabular classification, and 4% (1 case) type IIIb. Mean follow up was 32 months. In the radiographic evaluation we found that in all the cases the center of rotation was moved to a more favorable position after the surgery. There was no implant loosening during the follow up. The Harris Hip Score went from a preoperative mean of 29,1 (min 2,8 - max 81,8) to a mean of 77,9 (min 33 - max 100) at the latest follow up visit (p<0,001). In this series of selected patients, the use of porous tantalum implants, pre-operative planning and meticulous surgical technique led to a good clinical and radiological result that was maintained during follow up.

Keywords : Hip; acetabulum; prosthesis; prosthesis failure; adult; Human; treatment outcome; arthroplasty.

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