Abstract
Postoperative hip dislocations have been reported in 0.5 to 10.6% of patients after primary posterolateral total hip arthroplasty (THA). Hip precautions are currently recommended for 6weeks postoperatively to reduce early dislocation and facilitate healing of the posterior soft tissue repair. To determine the impact of a modified 4-week precaution protocol on the dislocation rate, 698 consecutive patients (797 hips) operated by a single surgeon between September 2008 and December 2012 were retrospectively evaluated. All patients had a standard THA using a minimal invasive posterior approach with posterior soft tissue repair and 28-36-mm head size. 98.7% of the patients were available for follow-up. There were eight (1%) dislocations in 797 hips in the first 12months after surgery with 4weeks of hip precautions. The average time to dislocation was 7.5weeks after surgery (range 1.0-16.9weeks); two dislocations (25%) took place in the first 4weeks. Shortening the time of posterolateral hip precautions from 6 to 4weeks after surgery does not increase the risk of postoperative dislocation.
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