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Pantrapezial osteoarthritis of the thumb (OA) includes involvements of scaphotrapezoidtrapezoidal (STT) and trapeziometacarpal (TM) joints which are source of disabling pain and function loss. Whilst radical procedures or arthroplasties are available, more conservative techniques have been developed recently and have gain popularity. They aim of this study was to know the midterms results of patients presenting peritrapezial OA treated with a double interposition pyrocarbon implant at the STT and TM joints. Our hypothesis was that patients suffering from pantrapezial OA treated with this technique would improve their functional scores at the last follow-up.

This descriptive, retrospective, observational study analysed 31 patients treated with a double STT and TM pyrocarbon interposition implant (“Burger arthroplasty”) between 2009–2018. Patients were clinically and …