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Assessing mechanical ankle instability via functional 3D stress-MRI - A pilot study.
Wenning, M; Lange, T; Paul, J; Gollhofer, A; Gehring, D.
Afiliación
  • Wenning M; Department of Sport and Sport Science, University of Freiburg, Schwarzwaldstr. 175, 79117 Freiburg, Germany; Department of Orthopedic and Trauma Surgery, University Medical Center, Medical Faculty, University of Freiburg, Hugstetter Str. 55, 79106 Freiburg, Germany. Electronic address: markus.wennin
  • Lange T; Department of Radiology, Medical Physics, Medical Center - University of Freiburg, Kilianstr. 5a, 79106 Freiburg, Germany. Electronic address: thomas.lange@uniklinik-freiburg.de.
  • Paul J; Rennbahnklinik, Kriegackerstr. 100, CH-4132 Muttenz, Basel, Switzerland. Electronic address: jochen.paul@rennbahnklinik.ch.
  • Gollhofer A; Department of Sport and Sport Science, University of Freiburg, Schwarzwaldstr. 175, 79117 Freiburg, Germany. Electronic address: ag@sport.uni-freiburg.de.
  • Gehring D; Department of Sport and Sport Science, University of Freiburg, Schwarzwaldstr. 175, 79117 Freiburg, Germany. Electronic address: dominic.gehring@sport.uni-freiburg.de.
Clin Biomech (Bristol, Avon) ; 70: 107-114, 2019 Dec.
Article en En | MEDLINE | ID: mdl-31472302
BACKGROUND: Quantitative measurement of the mechanical deficit in chronic ankle instability (CAI) is difficult. Therefore, the distinction between functional (FAI) and mechanical ankle instability (MAI) as well as the evaluation of surgical techniques is difficult. This pilot study uses a novel method of functional 3-dimensional stress ankle-MRI to test its applicability for assessing mechanical ankle instability. METHODS: We used a custom-built ankle arthrometer that allows a stepless positioning of the foot and an axial in situ loading with up to 500 N combined with a 3-dimensional MRI protocol. We assessed four parameters (3D cartilage contact area (CCA) fibulotalar, tibiotalar horizontal and vertical and intermalleolar distance) under six different conditions (neutral-null, plantarflexion-supination and dorsiflexion-pronation each with and without loading) in n = 10 individuals (7 suffering from MAI and 3 healthy controls). FINDINGS: The MAI group showed a substantially increased reduction of lateral osseous constraint compared to healthy controls when the foot was positioned in plantarflexion-supination (CCA fibulotalar 69% vs. 30% in controls). The reduction of the weight bearing surface in plantarflexion-supination was also more pronounced (CCA tibiotalar horizontal -49% in MAI vs. -28% in controls). INTERPRETATION: This novel technique is valuable for assessing mechanical ankle instability in the target population and has a potential clinical benefit for assessing the mechanical deficit of individual patients. Further studies are needed to provide evidence for a possible prognostic value of this novel technique.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Imagen por Resonancia Magnética / Imagenología Tridimensional / Inestabilidad de la Articulación / Tobillo / Articulación del Tobillo Tipo de estudio: Guideline / Prognostic_studies Límite: Adult / Humans / Male Idioma: En Revista: Clin Biomech (Bristol, Avon) Asunto de la revista: ENGENHARIA BIOMEDICA / FISIOLOGIA Año: 2019 Tipo del documento: Article Pais de publicación: Reino Unido
Texto completo
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Imagen por Resonancia Magnética / Imagenología Tridimensional / Inestabilidad de la Articulación / Tobillo / Articulación del Tobillo Tipo de estudio: Guideline / Prognostic_studies Límite: Adult / Humans / Male Idioma: En Revista: Clin Biomech (Bristol, Avon) Asunto de la revista: ENGENHARIA BIOMEDICA / FISIOLOGIA Año: 2019 Tipo del documento: Article Pais de publicación: Reino Unido