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Early failure of a non-cemented femoral stem after minimal-invasive total hip arthroplasty: cause analysis and classification

Benthien, Jan ; Siepen, Wolf

In: MUSCULOSKELETAL SURGERY, 2014, vol. 98, no. 1, p. 77-80

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    Title
    • Early failure of a non-cemented femoral stem after minimal-invasive total hip arthroplasty: cause analysis and classification
    Author
    • Benthien, Jan. Department of Trauma Surgery, University of Basel, Spitalstr. 21, 4031, Basel, Switzerland
    • Siepen, Wolf. Department of Orthopaedics, Cantonal Hopital Bruderholz, Basel, Switzerland
    Document Type
    • Postprint
    OAI-PMH Identifier
    • oai:doc.rero.ch:325177
    Summary
    In this paper, we present a 77-year-old female patient with an early failure of a non-cemented femoral stem 6months after implantation. We evaluate possible reasons for the implant failure in our case against the literature. Risk factors for stem failure include a BMI >30, varus implantation, a high femoral canal cortex ratio, and a small implant. It should be distinguished between modular and non-modular stems as well as cemented and non-cemented. Early failure would be <1year postoperatively, late failure >1year postoperatively. A classification of stem failure differentiating time and cause is suggested as this seems to be missing in the literature.