title: Analysis of movement axes of the ankle and subtalar joints: relationship with the articular surfaces of the talus.
abstract: Bone shape varies among human populations, and in the case of articular joints, the shape of the articulating surfaces strongly influences joint movement. In this study, we aimed to analyse the axes of the talocrural and subtalar joints, using the talar articular surface method, and compare these results with those of the previous studies. We used three-dimensional reconstruction models of tali among Korean individuals. The axes of the talocrural and subtalar joints were calculated by using the least-square sphere fitting method, and the principal axis was used for reference coordination. The shape of the talus was classified based on the shape of its anterior, middle, and posterior calcaneal facets, and the talar shape was compared with the movement axes. The movement axes did not differ according to the type of calcaneal facets of the talus. Interestingly, we also noted that the axes of the talocrural and subtalar joints in this study differed significantly from those reported in the previous studies; these differences may be due to variations in the shape of the bones.
authors.affiliation: Department of Anatomy, Catholic Institute for Applied Anatomy, The Catholic University of Korea, Seoul, Korea.
authors.forename: Ho-Jung
authors.initials: HJ
authors.lastname: Cho
authors.affiliation: Department of Anatomy, Catholic Institute for Applied Anatomy, The Catholic University of Korea, Seoul, Korea.
authors.forename: Dai-Soon
authors.initials: DS
authors.lastname: Kwak
authors.affiliation: Department of Anatomy, Catholic Institute for Applied Anatomy, The Catholic University of Korea, Seoul, Korea daisoon@catholic.ac.kr ibkimmd@catholic.ac.kr.
authors.forename: In-Beom
authors.initials: IB
authors.lastname: Kim
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D000843:Ankle Joint / Q000033:anatomy & histology* / Q000000981:diagnostic imaging / Q000502:physiology*; D003198:Computer Simulation; D005260:Female; D006801:Humans; D021621:Imaging, Three-Dimensional / Q000379:methods*; D008297:Male; D008875:Middle Aged; D008953:Models, Anatomic; D008954:Models, Biological; D011857:Radiographic Image Interpretation, Computer-Assisted / Q000379:methods; D016059:Range of Motion, Articular / Q000502:physiology*; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D013380:Subtalar Joint / Q000033:anatomy & histology* / Q000000981:diagnostic imaging / Q000502:physiology*
keywords: Ankle joint; movement axis; subtalar joint; talus