Fig. 2.

Preoperative posteroanterior radiograph of the thumb. TM distance is measured from the distal end of the thumb metacarpal, to the proximal end of the trapezium. Measurement of the proximal phalanx is used as a reference measurement.

Preoperative posteroanterior radiograph of the thumb. TM distance is measured from the distal end of the thumb metacarpal, to the proximal end of the trapezium. Measurement of the proximal phalanx is used as a reference measurement.