Influence of the Radiological Stage on the Efficiency of Viscosupplementation in Basal Thumb Arthritis

The rhizarthrose is the most frequent affection of the hand at the age fifty and beyond. For the moderate forms of the disease, the majority of the studies recommend the recourse to the viscosupplement because of its efficiency in the long term. On the other hand, no study was focused on the impact of the anatomical severity on the clinical result of the treatment by intra-articular injection of hyaluronic acid. The present research has for objective to study the influence of the radiological severity on the result of the viscosupplement, in the conditions of daily practice, in patients affected by rhizarthrose. It is an open observational multicentrical prospective study realized by 10 investigators rheumatologists and liberal orthopedic surgeons. The recruitment is competitive and the study will be ended when 55 patients will have been included by taking into account a risk of trial exits or of lost of sight of 10 %.The main criterion is the influence of the radiological stage on the answer to the treatment. Duration of inclusion 6 months. Duration of follow-up 3 months. Total duration of the study 9 months.