gms | German Medical Science

Objectives: Groin pain is a cause for total hip arthroplasty (THA) revision; the rate ranges from 0.4% to 26%. No publication reports this event when using Dual Mobility Cups (DMC). Purpose of this study was to evaluate occurrence of this complication and revision in a prospective series of 548 cases of DM at 5 years.

Methods: From May 2012 to December 2013, 548 patients were operated on with a DM THA. 24 (5%) patients died (unrelated to the THA) 16 (3%) were lost to follow up. We identified patients complaining with significant groin pain (PMA score < 3 or HHS pain marked- disabled ). Major revision and minor revision were analysed. Qualitative variables were presented as percentage, quantitative variables as mean and range.

Results and conclusion: Mean age of the patients at surgery was 71.17 year (Sd10.45:36-98). 63% were female. Diagnoses were osteo-arthritis (479;87%), post traumatic arthritis (9;2%), hip dysplasia (19;3%), aseptic necrosis (36;7%) rheumatoid arthritis (5;1%). A postero lateral approach was used in 458 (84%) cases, antero-lateral (Hardinge) in 90 (16%) cases. 5(0.9%) patients complained with significant groin pain at more than 1 year. 3 (0,5%) were revised with a cup replacement at 12 and 18 months post op. 2 patients still have groin pain but have not been revised. Groin pain rate varies from 0.4% to 26 % according to major national registries (Swedish, New Zealand, England and Wales, Australian). No publication reports the rate of groin pain and revision in DM. Epinette et al. reported 3 cases with pain (not revised) among 325 DM. Guicherd et al. reported on a multicentre series of 64 cases of arthroscopic release of the ilio psoas tendon in THA (21% were DM). According to our results we would suggest that DM does not increase the rate of groin pain.