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High failure rate of modular exchange seen with constrained liner for revision THA
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There was a higher failure rate, especially with a modular exchange, with the implantation of a focally constrained liner in revision total hip arthroplasty, according to study results.
Researchers identified 58 patients who underwent revision total hip arthroplasty (THA) with a focally constrained liner. There were 19 hip reconstructions concurrently performed with an acetabular component revision and 39 hips had a well-fixed acetabular shell. The mean number of ipsilateral hip surgeries prior to revision THA was 4.2. Investigators analyzed clinical outcomes, redislocations and revisions at a mean follow-up of 3.5 years.
Investigators found the mean Harris Hip score was 74. Investigators noted at the final follow-up that 14 hips were revised and three hips needed reoperation. At a mean time of 12.2 months, there were 11 hips that had dislocated. Investigators found 31% of patients needed a modular exchange for instability dislocations.
According to researchers, the number of previous surgeries, implantation of a 22-mm femoral head, revision indication for instability and modular exchange with constrained implantation without the acetabular shell revision were all risk factors for redislocation. ‒ by Monica Jaramillo
Disclosures: Chalmers reports no relevant financial disclosures. Please see the full study for a list of all other authors’ relevant financial disclosures.
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