Efficacy of a semirigid ankle brace in reducing mechanical ankle instability evaluated by 3D stress-MRI
| Autor: | Hagen Schmal, Thomas Lange, Spartak Ovsepyan, Albert Gollhofer, Markus Wenning, Dominic Gehring, Helge Eberbach |
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| Rok vydání: | 2021 |
| Předmět: |
Joint Instability
musculoskeletal diseases medicine.medical_specialty Visual analogue scale Mechanical ankle instability Diseases of the musculoskeletal system Cartilage contact area Humans Medicine Orthopedics and Sports Medicine Ankle brace Ankle instability Mechanical instability Orthopedic surgery Orthodontics business.industry Magnetic Resonance Imaging Brace Biomechanical Phenomena Neutral position medicine.anatomical_structure RC925-935 3D stress-MRI Axial load Surgery Ankle business human activities RD701-811 Ankle Joint Research Article |
| Zdroj: | Eberbach, H, Gehring, D, Lange, T, Ovsepyan, S, Gollhofer, A, Schmal, H & Wenning, M 2021, ' Efficacy of a semirigid ankle brace in reducing mechanical ankle instability evaluated by 3D stress-MRI ', Journal of Orthopaedic Surgery and Research, vol. 16, 620 . https://doi.org/10.1186/s13018-021-02750-6 Journal of Orthopaedic Surgery and Research Journal of Orthopaedic Surgery and Research, Vol 16, Iss 1, Pp 1-8 (2021) |
| ISSN: | 1749-799X |
| DOI: | 10.1186/s13018-021-02750-6 |
| Popis: | Background Novel imaging technologies like 3D stress-MRI of the ankle allow a quantification of the mechanical instability contributing to chronic ankle instability. In the present study, we have tested the efficacy of a semirigid ankle brace on joint congruency in a plantarflexion/supination position with and without load. Methods In this controlled observational study of n = 25 patients suffering from mechanical ankle instability, a custom-built ankle arthrometer implementing a novel 3D-stress MRI technique was used to evaluate the stabilizing effect of an ankle brace. Three parameters of joint congruency (i.e., 3D cartilage contact area fibulotalar, tibiotalar horizontal and tibiotalar vertical) were measured. The loss of cartilage contact area from neutral position to a position combined of 40° of plantarflexion and 30° of supination without and with axial load of 200 N was calculated. A semirigid ankle brace was applied in plantarflexion/supination to evaluate its effect on joint congruence. Furthermore, the perceived stability of the brace during a hopping task was analyzed using visual analogue scale (VAS). Results The application of a semirigid brace led to an increase in cartilage contact area (CCA) when the foot was placed in plantarflexion and supination. This effect was visible for all three compartments of the upper ankle joint (P η2 = 0.54). The effect of axial loading did not result in significant differences. The subjective stability provided by the brace (VAS 7.6/10) did not correlate to the magnitude of the improvement of the overall joint congruency. Conclusions The stabilizing effect of the semirigid ankle brace can be verified using 3D stress-MRI. Providing better joint congruency with an ankle brace may reduce peak loads at certain areas of the talus, which possibly cause osteochondral or degenerative lesions. However, the perceived stability provided by the brace does not seem to reflect into the mechanical effect of the brace. Trial registration The study protocol was prospectively registered at the German Clinical Trials Register (#DRKS00016356). |
| Databáze: | OpenAIRE |
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