Early failure of a non-cemented femoral stem after minimal-invasive total hip arthroplasty: cause analysis and classification.
Musculoskelet Surg 2012;
98:77-80. [PMID:
22562648 DOI:
10.1007/s12306-012-0202-7]
[Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2011] [Accepted: 04/14/2012] [Indexed: 10/28/2022]
Abstract
In this paper, we present a 77-year-old female patient with an early failure of a non-cemented femoral stem 6 months 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 <1 year postoperatively, late failure >1 year postoperatively. A classification of stem failure differentiating time and cause is suggested as this seems to be missing in the literature.
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