Complications of trapeziometacarpal arthrodesis using plate and screw fixation

This study was designed to determine the complications associated with plate and screw fixation of thumb trapeziometacarpal arthrodesis and to compare these results with a previous report from our institution using K-wire fixation.

We retrospectively reviewed 26 trapeziometacarpal arthrodeses that used plate and screw fixation. The most common diagnosis was primary osteoarthritis and the average follow-up evaluation was 40 months. Nineteen patients were available for a clinical follow-up examination and radiographs. These results were compared with the previously published K-wire fixation group that consisted of 59 arthrodeses with an average follow-up period of 84 months.

There were 2 (8%) painful nonunions. There were 6 (23%) hardware malpositions, most frequently associated with a screw in the trapeziotrapezoid joint. Seven (27%) arthrodeses had a second procedure, most commonly hardware removal. Twenty-one (81%) of the patients were satisfied and reported they would have arthrodesis again. In the K-wire fixation group 4 of 59 (7%) arthrodeses went on to nonunion and 2 of 59 required a secondary procedure; patient satisfaction was high (98%).

K-wire and plate and screw fixation have comparable union rates. In the plate and screw fixation group, however, the satisfaction rate was lower and a second surgery was more common. We now recommend pin fixation when performing trapeziometacarpal joint arthrodesis.