Fig 1.

Arthroscopic dorsal closing-wedge osteotomy of the second metatarsal (MT) head of the right foot. The patient is in the supine position. A triangular supporting frame is placed under the knee to flex the knee and put the foot flat onto the operating table. This procedure is performed via the dorsomedial portal (DMP) and dorsolateral portal (DLP), which are at the metatarsophalangeal joint level and at the medial and lateral sides of the extensor digitorum longus tendon to the second toe, respectively. (ET, extensor tendon; PP, proximal phalanx.)