Joint-Preserving Surgeries for Hallux Rigidus Based on Etiology: A Review and Commentary.

In 1927, Cochrane noted that elastic resistance to dorsiflexion of the hallux was retained after the cheilectomy or dorsiflexion osteotomy of the metatarsal head and speculated that the shortening and tightness of the soft tissues below the first metatarsophalangeal joint would be the etiology of hallux rigidus. He devised a novel surgery in which the plantar tissues were divided using a plantar approach and reported good results in 12 patients with the disappearance of elastic resistance during dorsiflexion and with no recurrence. Although he identified the etiology of hallux rigidus and developed a revolutionary surgery that directly addressed the etiology, this approach has not yet been seen in current surgeries. Therefore, we hypothesized that current surgeries for hallux rigidus lack rationality regarding etiology and aimed to critically review joint-preserving surgeries based on etiology. First, we summarized the literature on proposed causes and explained how the condition progresses from shortened, tightened plantar soft tissues. We then reviewed joint-preserving surgeries in terms of etiology and treatment efficacy and finally mentioned the arthroscopic Cochrane procedure as a promising option.