The rheumatoid swan-neck deformity.

It is important to evaluate each swan-neck deformity to determine the mobility and radiographic condition of the PIP joint. This information forms a basis for logical treatment. In those fingers with little or no loss of motion, the treatment alternatives include DIP joint fusions, dermadesis, or flexor tenodesis. With significant loss of PIP joint motion, an attempt is made to first restore passive motion by manipulation and lateral band or skin releases. It then becomes essential to restore flexor tendon excursion. In those patients with destroyed joint surfaces the salvage procedures of fusion and arthroplasty are the treatments of choice.