The arthroscopic Lapidus procedure.

BACKGROUND: Hypermobility of the first metatarsocuneiform (MC) joint is one of the causes believed to contribute to symptomatic hallux valgus. An arthrodesis of the first MC joint offers definitive correction of the intermetatarsal angle. This procedure can be associated with pseudoarthrosis and shortening of the first ray. This study presents our experience and results with an arthroscopic technique for performing this arthrodesis.

MATERIALS AND METHODS: Five patients with severe hallux valgus associated with hypermobility of the first MC joint were treated with this operation.

RESULTS: The functional assessment scales revealed very good results. Radiographic evaluation confirmed fusion in all the patients. The hallux valgus angle improved by 25.6°, the intermetatarsal angle improved by 10.6°. The shortening of the first ray was limited to 2.7 mm.

CONCLUSION: This new technique is a valid option for performing an arthrodesis of the MC joint.