Document Type

Article

Publication Date

2011

DOI

10.1002/jor.21407

Publication Title

Journal of Orthopaedic Research

Volume

29

Issue

10

Pages

1459-1464

Abstract

Patients with subtalar joint instability are often diagnosed with ankle instability. Only after a prolonged period of time in which a patient does not improve after treatment for ankle instability is subtalar joint instability considered. To develop a clinically relevant method to diagnose subtalar joint instability, the kinematics of the simulated unstable subtalar joint were examined. A 6 degree-of-freedom positioning and loading device was developed. Plantarflexion/dorsiflexion, inversion/eversion, and internal/external rotation were applied individually or as coupled motions along with an anterior/posterior drawer. Kinematic data were collected from sensors attached to the calcaneus, talus, and tibia by keeping all the ligaments intact, and by serially sectioning anterior talofibular ligament (ATFL), calcaneofibular ligament (CFL), cervical ligament, and talocalceneal interosseous ligament. Kinematic results were reported using Euler angles. The ATFL and CFL contributed talocrural instability, similar to previous studies. The interosseous ligament was the greatest contributor to subtalar joint stability. The hindfoot motion (calcaneus relative to tibia) showed significant increases in motion when the ankle and/or subtalar joint was made to be unstable. Therefore, it is difficult to diagnose subtalar joint instability on physical examination alone. (C) 2011 Orthopaedic Research Society.

Comments

Web of Science: "Free full-text from pulisher -- gold open access."

Original Publication Citation

Ringleb, S. I., Dhakal, A., Anderson, C. D., Bawab, S., & Paranjape, R. (2011). Effects of lateral ligament sectioning on the stability of the ankle and subtalar joint. Journal of Orthopaedic Research, 29(10), 1459-1464. doi:10.1002/jor.21407

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