AI Article Synopsis
- The study assessed how ligaments and the ankle's articular surface contribute to stability under normal loading conditions, identifying both primary and secondary constraints.
- The articular surface provided 30% stability against rotational movements and was the exclusive source of stability for inversion and eversion during physiologic loading, indicating a unique finding in ankle stability research.
- The results emphasized the significance of specific ligaments, particularly the anterior talofibular and calcaneofibular ligaments, while suggesting that ankle instability may occur primarily during transitional loading rather than when fully loaded.
Article Abstract
The stabilizing capacity of the ligaments and articular surface in the ankle was determined under defined physiologic loading conditions. The concept of primary and secondary constraints was adapted to the ankle. With physiologic loading, the articular surface accounted for 30% and 100% of stability in rotation and version, respectively. That the articular surface was the sole source of inversion and eversion stability under the prescribed physiologic loading conditions has not been previously reported. The demonstration that the articular surface resists inversion displacement in the loaded ankle supports the conclusion of previous studies that rotation, rather than inversion, may account for a type of clinically symptomatic ankle instability. Further, ankle instability may occur during loading and unloading but not once the ankle is fully loaded. The results of our study confirm the importance of the anterior talofibular and calcaneofibular ligaments and suggest an important role for the deltoid ligament.
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| http://dx.doi.org/10.1177/036354658501300502 | DOI Listing |
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