[Correction of malalignment of the ring finger after Kirschner wire infection of the phalangeal-interphalangeal joint].

After a tractus-intermedius rupture of the extensor aponeurosis of the ring finger, a Kirschner wire infection developed following an initially uncomplicated course after surgical care and PIP-joint transfixation. In spite of adequate therapy, destruction of the PIP-joint subsequently developed with an ulnar dislocation of the distal ring finger. With an unicondylar corrective osteotomy it was possible to achieve a normal position and an improvement in mobility.