title: A mechanical supination sprain simulator for studying ankle supination sprain kinematics.
abstract: This study presents a free-fall mechanical supination sprain simulator for evaluating the ankle joint kinematics during a simulated ankle supination sprain injury. The device allows the foot to be in an anatomical position before the sudden motion, and also allows different degrees of supination, or a combination of inversion and plantarflexion. Five subjects performed simulated supination sprain trials in five different supination angles. Ankle motion was captured by a motion analysis system, and the ankle kinematics were reported in plantarflexion/dorsiflexion, inversion/eversion and internal/external rotation planes. Results showed that all sprain motions were not pure single-plane motions but were accompanied by motion in other two planes, therefore, different degrees of supination were achieved. The presented sprain simulator allows a more comprehensive study of the kinematics of ankle sprain when compared with some previous laboratory research designs.
authors.affiliation: Department of Orthopaedics and Traumatology, Prince of Wales Hospital, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong. yychan@ort.cuhk.edu.hk
authors.forename: Yue-Yan
authors.initials: YY
authors.lastname: Chan
authors.forename: Daniel Tik-Pui
authors.initials: DT
authors.lastname: Fong
authors.forename: Patrick Shu-Hang
authors.initials: PS
authors.lastname: Yung
authors.forename: Kwai-Yau
authors.initials: KY
authors.lastname: Fung
authors.forename: Kai-Ming
authors.initials: KM
authors.lastname: Chan
mesh_terms: D000843:Ankle Joint / Q000502:physiology*; D001696:Biomechanical Phenomena; D003198:Computer Simulation; D006801:Humans; D013180:Sprains and Strains / Q000473:pathology*; D013484:Supination / Q000502:physiology*