title: A mechanical jig for measuring ankle supination and pronation torque in vitro and in vivo.
abstract: This study presents the design of a mechanical jig for evaluating the ankle joint torque on both cadaver and human ankles. Previous study showed that ankle sprain motion was a combination of plantarflexion and inversion. The device allows measurement of ankle supination and pronation torque with one simple axis in a single step motion. More importantly, the ankle orientation allows rotation starting from an anatomical position. Six cadaveric specimens and six human subjects were tested with simulated and voluntary rotation respectively. The presented mechanical jig makes possible the determination of supination torque for studying ankle sprain injury and the estimation of pronation torque for examining peroneal muscle response.
authors.affiliation: Department of Orthopaedics and Traumatology, Prince of Wales Hospital, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong, China. dfong@ort.cuhk.edu.hk
authors.forename: Daniel Tik-Pui
authors.initials: DT
authors.lastname: Fong
authors.forename: Mandy Man-Ling
authors.initials: MM
authors.lastname: Chung
authors.forename: Yue-Yan
authors.initials: YY
authors.lastname: Chan
authors.forename: Kai-Ming
authors.initials: KM
authors.lastname: Chan
mesh_terms: D000328:Adult; D000842:Ankle / Q000502:physiology*; D001696:Biomechanical Phenomena; D006801:Humans; D008297:Male; D011403:Pronation; D012399:Rotation; D013484:Supination; D019415:Torque