We identified all acetabular revisions using a TM shell (Zimmer Biomet, Warsaw, IN) during 2008–2016 in our local arthroplasty register. Whenever a patient had revision in both hips, only the hip that was revised first was included (Ranstam et al. 2011 (link)). 184 hips were thus included, and we divided this cohort into 2 subgroups. DMC group: 69 hips were treated with a DMC (Avantage; Zimmer Biomet, Warsaw, IN) cemented into a larger TM shell (TM Modular, Trilogy TM or TM Revision shell, Zimmer Biomet, Warsaw, IN). PE group: 115 hips received a standard polyethylene (PE) liner inside a TM shell, either as a standard snap-fit liner when a smaller TM shell was used (Continuum, TM Modular, or Trilogy TM; Zimmer Biomet, Warsaw, IN), or a PE liner cemented into a larger TM shell (TM Modular, Trilogy TM, or TM Revision shell; Zimmer Biomet, Warsaw, IN). PE liners were cemented according to the manufacturer’s instructions.
To ensure that no dislocations treated with closed reduction went unnoticed, we accessed all patient charts and searched charts for all closed reductions, thus ensuring complete chart follow-up for all patients.
To ensure that no dislocations treated with closed reduction went unnoticed, we accessed all patient charts and searched charts for all closed reductions, thus ensuring complete chart follow-up for all patients.