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Oversized Cups as a Major Risk Factor of Postoperative Pain After Total Hip Arthroplasty.
J Arthroplasty. 2013 Aug 5;
Authors: Odri GA, Padiolleau GB, Gouin FT
Abstract
After total hip arthroplasty (THA) some patients have persistent postoperative pain (POP). Some of these POP are anterior and are caused by an anterior iliopsoas impingement (AIPI). We have hypothesized that oversized implanted cups could be responsible for POP and especially AIPI. We screened 237 patients who had a primary THA and compared the size difference (ΔS) between the native femoral head and the implanted cup, in patients with and without POP. Median ΔS was 2mm [-6; 11mm] and patients with POP had a significantly increased ΔS (P<0.0001). The threshold above which pain was significantly more frequent was ΔS≥6mm. Odds ratio was 14.4 for POP and 26 for AIPI pain when ΔS ≥6mm.
PMID: 23927907 [PubMed - as supplied by publisher]
Read more... http://www.ncbi.nlm.nih.gov/pubmed/23927907?dopt=Abstract
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