Mechanical instability destabilises the ankle joint directly in the ankle-sprain mechanism

Abstract

The present study demonstrates that MAI is characterised by impairments of ankle-joint control in close-to-injury situations. This could make these individuals more prone to recurrent ankle sprains, and suggests the need for additional mechanical support such as braces or even surgery. In addition, the study highlights the fact that dynamic experimental test conditions in the acting participant are needed to further unravel the mystery of chronic ankle instability.

Shapes of distal tibiofibular syndesmosis are associated with risk of recurrent lateral ankle sprains

“…The width of the ankle mortise will vary with the different depth of the incisura fibularis and shape of the tibial tubercles during the changes of gait cycle. When the ankle mortise space is widening, the ankle mortise turns more unstable, resulting in the risk of ankle sprain 5, 6 . In our study, the “1” shape showed widest range of displacement of the DTS in the y-axis, along with the ROM on the position more than 20° of the ankle dorsiflexion, inversion and eversion.…”

“…In our study, the “1” shape showed widest range of displacement of the DTS in the y-axis, along with the ROM on the position more than 20° of the ankle dorsiflexion, inversion and eversion. These cause a widening of the mortise, resulting in the risk of ankle instability 5, 6 . As a result of 3 years follow-up in the 300 participants, the “1” shape of the DTS had a higher risk of recurrent lateral ankle sprains and ATFL injury with avulsed bone fragments, and this result consistent with the result of the displacement of the DTS in 3D space underwent 3D laser scanning.…”

“…Patients with inversion ankle sprains constitute a large percentage of these injuries, and occur with an incidence of one sprain per 10,000 people per day 3, 4 . The most common mechanism of this injury is when the foot undergoes an inversion moment with the ankle in plantar flexion, damaging the lateral ligament complex of the ankle 5, 6 . The most pervasive predisposition to suffering a lateral ankle sprain is the history of at least one previous ankle sprain 7, 8 .…”

Effects of Whole Body Vibration Exercise on Lower Extremity Muscle Activity and Balance Ability in Football Player with Chronic Ankle Instability

“…2 Ankle sprain causes reduced dorsiflexion range of motion (ROM), and especially affects the gait pattern during walking and running, which increases the risk of re-injury. 3,4 In addition to the ankle ligaments, ankle sprain also causes injury to neural tissue in the ankle, including mechanoreceptors. This leads to deficits in kinetic sense and position sense, and 31-40% of subjects who experience ankle sprain show chronic ankle instability (CAI).…”

In vivo arthrometer measurements of mechanical ankle instability—A systematic review

“…There is evidence that recurrent lateral ankle sprains may lead to mechanical but not perceived instability, characterizing these patients as so‐called ankle sprain copers . Furthermore, it has been shown that a relevant mechanical instability can also cause a functional impairment which significantly reduces joint control and increases the severity of the pathological condition . In this context, one primary goal of current research is to quantify the amount of mechanical instability that will lead to clinically apparent CAI …”