title: Joint-preserving surgery of asymmetric ankle osteoarthritis with peritalar instability.
abstract: A varus or valgus talar tilt that increases under weight-bearing is commonly seen in osteoarthritic ankles. Loss of peritalar stability may be the underlying cause for the talus shifting and rotating on the calcaneonavicular surfaces, as given by applied forces. The instability pattern and the resulting deformity can be assessed and classified using weight-bearing conventional radiographs. Appropriate osseous balancing may be the most appropriate treatment to restore a regular position of talus within the ankle mortise. In cases with severe peritalar instability, subtalar fusion may be advised. Soft tissue reconstruction may be needed to achieve physiologic balance of the hindfoot complex.
authors.affiliation: Orthopaedic Department, Clinic of Orthopaedic Surgery and Traumatology, Kantonsspital Baselland, Rheinstrasse 26, Liestal CH-4410, Switzerland. beat.hintermann@ksbh.ch
authors.forename: Beat
authors.initials: B
authors.lastname: Hintermann
authors.forename: Markus
authors.initials: M
authors.lastname: Knupp
authors.forename: Alexej
authors.initials: A
authors.lastname: Barg
mesh_terms: D000843:Ankle Joint / Q000473:pathology / Q000601:surgery*; D005531:Foot Deformities, Acquired / Q000209:etiology / Q000601:surgery*; D006801:Humans; D007593:Joint Instability / Q000209:etiology / Q000601:surgery*; D010003:Osteoarthritis / Q000150:complications / Q000601:surgery*; D010027:Osteotomy / Q000009:adverse effects / Q000379:methods*; D013628:Talus / Q000473:pathology / Q000601:surgery*; D016896:Treatment Outcome
keywords: Asymmetric ankle osteoarthritis; Calcaneal osteotomy; Joint-preserving surgery; Peritalar instability; Supramalleolar osteotomy; Valgus ankle; Varus ankle