Fig. 5

A. The extension lag of the patient’s PIP joint was 83°. B. The width of the digit base (W) was 20.0 mm. C. The height of the V–Y flap is 1.5 W from the base of the contracted digit, which is 30.0 mm. D. Tenoarthrolysis performed through bilateral mid-lateral approach. E. Full passive extension of the contracted digit, recorded during the surgery. F. Postoperative plain film showing that the extension lag of right fourth PIP joint has decreased to 56° actively