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Information Journal Paper

Title

Changes of the Patellar Tendon Moment Arm Length in Different Knee Angles: A Biomechanical in Vivo Study (TECHNICAL NOTE)

Pages

  641-645

Abstract

 Patellar tendon moment arm length (PTma) changes at different Knee flexion angles have not been determined in in vivo studies. We aimed to determine PTma in four different Knee angles using Magnetic Resonance Imaging (MRI) to predict in vivo changes in the moment arm length from different Knee angles during running. PTma was measured as the perpendicular distance from muscle– tendon line of action to the Knee joint axis of rotation at 0° (full extension), 20° , 40° , and 60° flexion of Knee by using MRI method. Repeated measure ANOVA method was applied to compare the moment arm length among four degrees of Knee flexion (P<0. 05). A regression analysis was used to predict the PTma during different Knee joint angles. The PTma in the four angles at 0° , 20° , 40° , and 60° of Knee flexion were 42. 55± 4. 20, 39. 91± 2. 98, 37. 73± 2. 87, and 36. 18± 2. 90 mm, respectively (P<0. 05). The regression analysis provided an equation to predict the PTma from different Knee joint angles during running. PTma values decreased from Knee extension to flexion in a linear manner. These findings have important implications for estimating PTma using a regression equation model from different Knee joint angles.

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    APA: Copy

    HOSSEINZADEH, SOMAYEH, BARZEGARI, ALI, TAGHIPOUR, MOHAMMAD, MEHR AEIN, RAHELEH, & GHOLINIA, HEMMAT. (2020). Changes of the Patellar Tendon Moment Arm Length in Different Knee Angles: A Biomechanical in Vivo Study (TECHNICAL NOTE). THE ARCHIVES OF BONE AND JOINT SURGERY, 8(5), 641-645. SID. https://sid.ir/paper/753838/en

    Vancouver: Copy

    HOSSEINZADEH SOMAYEH, BARZEGARI ALI, TAGHIPOUR MOHAMMAD, MEHR AEIN RAHELEH, GHOLINIA HEMMAT. Changes of the Patellar Tendon Moment Arm Length in Different Knee Angles: A Biomechanical in Vivo Study (TECHNICAL NOTE). THE ARCHIVES OF BONE AND JOINT SURGERY[Internet]. 2020;8(5):641-645. Available from: https://sid.ir/paper/753838/en

    IEEE: Copy

    SOMAYEH HOSSEINZADEH, ALI BARZEGARI, MOHAMMAD TAGHIPOUR, RAHELEH MEHR AEIN, and HEMMAT GHOLINIA, “Changes of the Patellar Tendon Moment Arm Length in Different Knee Angles: A Biomechanical in Vivo Study (TECHNICAL NOTE),” THE ARCHIVES OF BONE AND JOINT SURGERY, vol. 8, no. 5, pp. 641–645, 2020, [Online]. Available: https://sid.ir/paper/753838/en

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