Objective: To explore the accurate in vivo kinematic changes in the ankle complex when wearing low-and high-heel shoes (LHS and HHS, respectively). Materials and methods: Twelve young women were tested unilaterally. Three-dimensional models of the tibia, talus, and calcaneus were first created based on CT scan results. The subjects walked at a self-controlled speed in barefoot, LHS (4 cm), and HHS (10 cm) conditions. A fluoroscopy system captured the lateral fluoroscopic images of the ankle complex. The images of seven key positions in the stance phase were selected, and 3D to 2D bone model registrations were performed to determine the joint positions. The mean of 6 degree of freedom (DOF) range of motions (ROM), joint positions, and angular displacements of the ankle complex during the gait were then obtained. Results: For the talocrural joint, the rotational ROMs of the subjects either in LHS or HHS condition displayed no significant difference from those in barefoot condition. For the subtalar joint, all the rotational ROMs in the HHS condition and the internal/external rotations in the LHS condition significantly decreased compared with those in the barefoot condition. The talocrural joint was positioned significantly more plantarflexed, inverted, internally rotated, and posteriorly seated in all seven poses in HHS condition, compared with those in barefoot condition. Conclusion: HHS mainly affected the rotational motion of the ankle complex during walking. The talocrural joint position was abnormal, and the subtalar joint ROM decreased during the gait in HHS condition. Only a few kinematic changes occurred in LHS condition relative to the barefoot condition. (C) 2016 Elsevier Ltd. All rights reserved.
[1]Fudan Univ, Huashan Hosp, Dept Orthoped, Shanghai 200433, Peoples R China.
[2]Harvard Univ, Sch Med, Boston, MA USA.
[3]Shanghai Univ Sport, Minist Educ, Key Lab Exercise & Hlth Sci, Shanghai, Peoples R China.
[4]Fudan Univ, Dept Radiol, Huashan Hosp, Shanghai 200433, Peoples R China.
(8.0+极速模式)