In Vivo Talocrural Joint Contact Mechanics With Functional Ankle Instability
| Autor: | Makoto Suzukawa, Takumi Kobayashi, Atsushi Akaike, Eiichi Suzuki, Kuniaki Shimizu, Naohito Yamazaki, Kazuyoshi Gamada |
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| Rok vydání: | 2015 |
| Předmět: |
Adult
Joint Instability Male musculoskeletal diseases Adolescent Rotation Kinematics Weight-Bearing Young Adult Imaging Three-Dimensional Humans Medicine Computer Simulation Orthopedics and Sports Medicine Podiatry Ankle instability business.industry Internal rotation Mechanics Joint contact Biomechanical Phenomena Cross-Sectional Studies Contact mechanics medicine.anatomical_structure Case-Control Studies Fluoroscopy Surgery Ankle Tomography X-Ray Computed Contact area business Ankle Joint |
| Zdroj: | Foot & Ankle Specialist. 8:445-453 |
| ISSN: | 1938-7636 1938-6400 |
| Popis: | Background. Functional ankle instability (FAI) may involve abnormal kinematics and contact mechanics during ankle internal rotation. Understanding of these abnormalities is important to prevent secondary problems in patients with FAI. However, there are no in vivo studies that have investigated talocrural joint contact mechanics during weightbearing ankle internal rotation. The objective of this study to determine talocrural contact mechanics during weightbearing ankle internal rotation in patients with FAI. Methods. Twelve male subjects with unilateral FAI (age range, 18-26 years) were enrolled. Computed tomography and fluoroscopic imaging of both lower extremities were obtained during weightbearing passive ankle joint complex rotation. Three-dimensional bone models created from the computed tomographic images were matched to the fluoroscopic images to compute 6 degrees of freedom for talocrural joint kinematics. The closest contact area in the talocrural joint in ankle neutral rotation and maximum internal rotation during either dorsiflexion or plantar flexion was determined using geometric bone models and talocrural joint kinematics data. Results. The closest contact area in the talus shifted anteromedially during ankle dorsiflexion–internal rotation, whereas it shifted posteromedially during ankle plantar flexion–internal rotation. The closest contact area in FAI joints was significantly more medial than that in healthy joints during maximum ankle internal rotation and was associated with excessive talocrural internal rotation or inversion. Discussion. This study demonstrated abnormal talocrural kinematics and contact mechanics in FAI subjects. Such abnormal kinematics may contribute to abnormal contact mechanics and may increase cartilage stress in FAI joints. Level of Evidence: Therapeutic, Level IV: cross-sectional case-control study |
| Databáze: | OpenAIRE |
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