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Related Experiment Video

Updated: Jun 29, 2026

A Mouse Model of Ankle-Subtalar Complex Joint Instability
09:14

A Mouse Model of Ankle-Subtalar Complex Joint Instability

Published on: October 28, 2022

Subtalar instability: a biomechanical cadaver study.

S Weindel1, R Schmidt, S Rammelt

  • 1Department for Hand-, Plastic and Reconstructive Surgery, Kantonsspital St Gallen, Rorschacher Str. 95, St Gallen, Switzerland. stefan.weindel@kssg.ch

Archives of Orthopaedic and Trauma Surgery
|October 8, 2008
PubMed
Summary
This summary is machine-generated.

Chronic foot and ankle instability may stem from subtalar joint issues. This study found the calcaneofibular ligament is crucial for subtalar joint stability, indicating its importance in surgical repair.

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Last Updated: Jun 29, 2026

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Published on: October 28, 2022

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Published on: September 18, 2020

Area of Science:

  • Orthopedic surgery
  • Biomechanics
  • Anatomy

Background:

  • Subtalar instability is a potential cause of chronic functional foot and ankle instability.
  • Understanding ligamentous contributions to subtalar joint stability is critical for effective treatment.

Purpose of the Study:

  • To investigate the extent of ligament injury leading to subtalar instability.
  • To characterize the resulting abnormal joint motion.

Main Methods:

  • Twelve human cadaver lower legs were analyzed.
  • Talocrural articulation was arthrodesed, followed by selective lateral subtalar ligament sectioning.
  • Ligaments were dissected anteriorly or posteriorly to simulate injury mechanisms.

Main Results:

  • Sectioning the bifurcate ligament increased plantarflexion and dorsiflexion.
  • Dissection of the inferior extensor retinaculum increased inversion and eversion.
  • Damage to the lateral talocalcaneal ligament increased internal and external rotation.
  • Complete disruption of the calcaneofibular ligament caused significant kinematic changes in all subtalar joint motions.

Conclusions:

  • The calcaneofibular ligament is essential for lateral subtalar joint stability.
  • Surgical repair should consider the ligaments of the subtalar joint for comprehensive treatment.