Stability of the Ankle Joint

Rasmussen, Ove

doi:10.3109/17453678509154152

Cited by 173 publications

(2 citation statements)

References 74 publications

(138 reference statements)

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“…4 This ligament is the weakest of the lateral ankle ligaments, with an ultimate tensile strength of 140 ± 24 N. 1 The ATFL acts as a restraint against internal rotation and plantar flexion of the foot. 19 Biomechanical studies on the ankle have demonstrated that with incompetence of the lateral ankle ligaments, the resultant anterolateral rotational instability allows the talus to internally rotate and anteriorly subluxate on the tibia. 12,13,15,17,20…”

Section: Discussionmentioning

confidence: 99%

Variations in Mortise Anatomy

Lebrun

Krause

2005

Am J Sports Med

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Section: Discussionmentioning

confidence: 99%

Variations in Mortise Anatomy

Lebrun

Krause

2005

Am J Sports Med

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“…Since bone meshes were expected to have a limited influence on the region of interest of this study, a larger mesh size, of 1 mm, was considered for bone to reduce computational complexity based on Tadepali et al 14 Bones were meshed with tetrahedral linear elements and cartilages with hexahedral linear elements. Nine ligaments, including three medial ligaments – posterior and anterior tibiotalar ligaments and the tibionavicular ligament – three lateral ligaments – posterior and anterior talofibular ligaments and the calcaneofibular ligament – and the calcaneonavicular, cuboideonavicular and calcaneocuboid ligaments, were modelled based on the studies of Rasmussen, 15 Corazza et al 16 and Guerra-Pinto et al 11 Tension only truss elements were used to define the ligaments. Coupling constraints were defined to connect the ligaments to the bones at their attachment sites.…”

Section: Methodsmentioning

confidence: 99%

Contact patterns in the ankle joint after lateral ligamentous injury during internal rotation: A computational study

Marta

Quental

Folgado

et al. 2020

Proc Inst Mech Eng H

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Lateral ankle instability, resulting from the inability of ankle ligaments to heal after injury, is believed to cause a change in the articular contact mechanics that may promote cartilage degeneration. Considering that lateral ligaments’ insufficiency has been related to rotational instability of the talus, and that few studies have addressed the contact mechanics under this condition, the aim of this work was to evaluate if a purely rotational ankle instability could cause non-physiological changes in contact pressures in the ankle joint cartilages using the ﬁnite element method. A finite element model of a healthy ankle joint, including bones, cartilages and nine ligaments, was developed. Pure internal talus rotations of 3.67°, 9.6° and 13.43°, measured experimentally for three ligamentous configurations, were applied. The ligamentous configurations consisted in a healthy condition, an injured condition in which the anterior talofibular ligament was cut, and an injured condition in which the anterior talofibular and calcaneofibular ligaments were cut. For all simulations, the contact areas and maximum contact pressures were evaluated for each cartilage. The results showed not only an increase of the maximum contact pressures in the ankle cartilages, but also novel contact regions at the anteromedial and posterolateral sections of the talar cartilage with increasing internal rotation. The anteromedial and posterolateral contact regions observed due to pathological internal rotations of the talus are a computational evidence that supports the link between a pure rotational instability and the pattern of pathological cartilaginous load seen in patients with long-term lateral chronic ankle instability.

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Technique for in vivo measurement of the three‐dimensional kinematics and laxity characteristics of the ankle joint complex

Siegler

Wang

Plasha

et al. 1994

Journal Orthopaedic Research

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We introduce here a technique to measure the three-dimensional kinematics and laxity characteristics of the ankle joint complex in vivo. The system consists of an optoelectric, kinematic data acquisition system that is used to measure the motion of the ankle joint complex in response to controlled moments applied through a system of pneumatic actuators. As a first step toward development of the method into a quantitative diagnostic tool for injuries of ankle ligaments, we addressed the following questions: (a) What is the reliability for measurement of range of motion and laxity of the ankle joint complex? (b) Are there significant differences in laxity between the left and right joints of a healthy individual? and (c) Are there significant differences in laxity of the ankle joint complex between men and women? To answer these questions, we performed repeated measures of range of motion and laxity of paired ankles in a population of 18 healthy young individuals. The high intraclass correlation coefficients obtained from the statistical analysis indicate that the new experimental system is highly reliable in measurement of total range of motion and total laxity of the ankle joint complex. We further concluded that, within the statistical power available in our experimental design, there are no significant differences in either range of motion or laxity between left and right ankles of healthy individuals or between men and women.

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Stability of the Ankle Joint

Cited by 173 publications

References 74 publications

Variations in Mortise Anatomy

Variations in Mortise Anatomy

Contact patterns in the ankle joint after lateral ligamentous injury during internal rotation: A computational study

Technique for in vivo measurement of the three‐dimensional kinematics and laxity characteristics of the ankle joint complex

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