Assessment of ankle-subtalar-joint-complex laxity using an instrumented ankle arthrometer : an experimental cadaveric investigation
Deutscher übersetzter Titel: | Beurteilung der Instabilität des Sprunggelenkkomplexes unter Verwendung eines instrumentierten Sprunggelenk-Arthrometers : eine experimentelle Untersuchung an einer Leiche |
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Autor: | Kovaleski, John E.; Hollis, J. Marcus; Heitman, Robert J.; Gurchiek, Larry R.; Pearsall IV, Albert W. |
Erschienen in: | Journal of athletic training |
Veröffentlicht: | 37 (2002), 4, S. 467-474, Lit. |
Format: | Literatur (SPOLIT) |
Publikationstyp: | Zeitschriftenartikel |
Medienart: | Elektronische Ressource (online) Gedruckte Ressource |
Sprache: | Englisch |
ISSN: | 1062-6050, 0160-8320, 1938-162X |
Schlagworte: | |
Online Zugang: | |
Erfassungsnummer: | PU201101000216 |
Quelle: | BISp |
Abstract
Objective: To show the relationship between direct measurements of tibial-calcaneal bone motion and instrumented measurements of ankle-subtalar-joint–complex laxity using a portable ankle arthrometer; to assess within and between-tester measurement reliability; and to determine if the ankle arthrometer can detect increased mechanical laxity of the ankle-subtalar-joint–complex after simulated injury of the lateral ankle ligaments. Design and Setting: We used linear regression analysis to examine the relationship between direct measurements of tibial-calcaneal bone motion and instrumented measurements of ankle-subtalar-joint–complex laxity. An intraclass correlation coefficient (2,1) was calculated to determine intratester and intertester reliability for instrumented measurements of ankle-subtalar-joint–complex laxity. In addition, 2 separate, one-way, repeated-measures analyses of variance were used to compare instrumented measures of anteroposterior displacement and inversion-eversion rotation among the intact ankles after sectioning the anterior talofibular ligament and both the anterior talofibular and calcaneofibular ligaments. Data were collected in a biomechanics laboratory setting. Subjects: Six fresh-frozen human-cadaver ankle specimens were studied. Measurements: Testing involved the concurrent measurement of tibial-calcaneal bone motion and ankle-subtalar-joint–complex motion during the application of external loads. An instrumented ankle arthrometer was used to load the ankle in a controlled manner. Two spatial kinematic linkages measured the 3-dimensional motion of the calcaneus relative to the tibia and the motion of the arthrometer's footplate relative to the tibia. Results: The correlation between tibial-calcaneal bone motion and instrumented measurement for anterior-posterior displacement was .878 (P = .0001). Its linear relationship with bone motion accounted for approximately 77% of the variance of the instrumented measurement. The correlation between tibial-calcaneal bone motion and instrumented measurement for inversion-eversion rotation was .858 (P = .0001), with approximately 74% of the variance of the instrumented measurement accounted for by its linear relationship with bone motion. High intratester and intertester reliability coefficients (ICC [2,1] = .80 to .97) were observed for instrumented measurements of ankle-subtalar-joint–complex laxity. In addition, ligamentous sectioning resulted in significantly increased ankle-subtalar-joint–complex laxity. When compared with the intact condition, sectioning both the anterior talofibular and calcaneofibular ligaments produced significant increases in anterior-posterior displacement (P = .0001) and inversion-eversion rotation (P = .002).Conclusions: We found a strong relationship between tibial-calcaneal bone motion and arthrometric measurements of ankle-subtalar-joint–complex laxity. The instrumented ankle arthrometer may be suitable as a diagnostic tool for the evaluation of lateral ankle-ligament laxity. Verf.-Referat