Early loosening of a cemented hip endoprosthesis stem of titanium

Up to now there are no facts concerning the loosening rate of the cemented titanium stem (Trios). The central guiding canula and the longitudinal drilled stem shall ensure a symmetric cement mantle. In order to estimate the risk of aseptic loosening all Trios prostheses implanted in our clinic (n =...

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Bibliographic Details
Published in:Der Unfallchirurg 2000-11, Vol.103 (11), p.956
Main Authors: Lichtinger, T K, Schürmann, N, Müller, R T
Format: Article
Language:ger
Subjects:
Aged
Aged, 80 and over
Arthroplasty, Replacement, Hip
Equipment Failure Analysis
Female
Hip Prosthesis
Humans
Male
Middle Aged
Postoperative Complications - etiology
Prosthesis Design
Prosthesis Failure
Retrospective Studies
Titanium
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Summary:Up to now there are no facts concerning the loosening rate of the cemented titanium stem (Trios). The central guiding canula and the longitudinal drilled stem shall ensure a symmetric cement mantle. In order to estimate the risk of aseptic loosening all Trios prostheses implanted in our clinic (n = 67; operations 1/95-11/96; max. follow-up: 3.1 years) were examined in a retrospective study and compared with a conventional femoral component (n = 141; Müller special; CoCr; operations 1977-1982). We used survivorship analysis to assess the results (Kaplan-Meier method; end point: revision). Compared to the conventional femoral stem the survival rate of the Trios prostheses was significantly worse (p = 0.0001). The probability of no revision after 3 years was 72% (conventional femoral component: 96%). Preoperative x-rays showed radiolucent lines surrounding the cement mantle. These findings as well as the loosening at the cement metal interface were confirmed intraoperatively. The explanted stems showed corresponding signs of abrasion on the surface. Our results prove that the application of cemented titanium stems might be problematic. With regard to the Trios prosthesis we recommend close routine check-ups to keep the chance of an early revision.
ISSN:0177-5537