Assessment of Ankle-Subtalar-Joint-Complex Laxity Using an Instrumented Ankle Arthrometer: An Experimental Cadaveric Investigation.

摘要: OBJECTIVE: To show the relationship between direct measurements of tibial-calcaneal bone motion and instrumented ankle-subtalar-joint-complex laxity using a portable ankle arthrometer; to assess within between-tester measurement reliability; determine if arthrometer can detect increased mechanical after simulated injury lateral ligaments. DESIGN AND SETTING: We used linear regression analysis examine laxity. An intraclass correlation coefficient (2,1) was calculated intratester intertester reliability for In addition, 2 separate, one-way, repeated-measures analyses variance were compare measures anteroposterior displacement inversion-eversion rotation among intact ankles sectioning anterior talofibular ligament both calcaneofibular Data collected in biomechanics laboratory setting. SUBJECTS: Six fresh-frozen human-cadaver specimens studied. MEASUREMENTS: Testing involved concurrent during application external loads. load controlled manner. Two spatial kinematic linkages measured 3-dimensional calcaneus relative tibia arthrometer's footplate tibia. RESULTS: The anterior-posterior was.878 (P =.0001). Its with accounted approximately 77% measurement. was.858 =.0001), 74% by its motion. High coefficients (ICC [2,1] =.80 to.97) observed ligamentous resulted significantly When compared condition, ligaments produced significant increases =.0001) =.002). CONCLUSIONS: found strong arthrometric may be suitable as diagnostic tool evaluation ankle-ligament