Contemporary rotating hinge arthroplasty can safely be recommended in complex primary surgery

{Purpose The objective was to evaluate clinical and radiological outcomes, survival rate and complications of primary contemporary rotating hinged total knee arthroplasty (CRH-TKA). Methods Through a national multicenter retrospective study (14 centers), 112 primary CRH-TKA performed between 2006 and 2011 were included. Indications were: severe frontal plane deformity (55%), inflammatory, constitutional, congenital or post-trauma arthritis (26%), ligament laxity (10%), primary osteoarthritis (9%). Population was elderly (68 +/- 13), sedentary (37.5% with a Devane score >= 3) and with important comorbidities (87% with ASA score >= 2). A clinical (KSS, Oxford scores) and radiological evaluation (implant loosening), as well as survival and reoperation rates assessment, were performed. Results At last follow-up (7 +/- 3 years), KSS and Oxford scores were 64 +/- 43 and 33 +/- 10 each with a significant improvement of both scores overtime (respectively