[Treatment of palmar dislocation and ulnar deviation of the metacarpophalangeal joint in chronic rheumatoid arthritis by modified Vainio arthroplasty].
In rheumatoid arthritis, a number of surgical procedures address the pathology at the metacarpophalangeal joint level. Besides synovialectomy, the use of endoprothetics is widespread. Particularly during the last years, more importance has again been attached to resection arthroplasty technique (e.g. Vainio's technique). The authors introduce a modified technique of Vainio's resection arthroplasty, permitting an active reposition of the proximal phalanx from its previous palmar dislocation and ulnar deviation. First clinical experience confirms the efficacy of this modified technique.