The Characteristics of Two Sizes of the JuggerKnot Mini 1.0 mm: 2-0 and 3-0

International audienc

関節潤滑における摩擦系構成成分の役割に関する実験的研究

1章 緒言 2章 生体関節の構造と構成成分 3章 実験方法 4章 実験結果 5章 結論Made available in DSpace on 2012-09-05T01:15:56Z (GMT). No. of bitstreams: 2 higaki1.pdf: 10264928 bytes, checksum: 77a7ea2db7d1fa2493d7220bfe78eb3e (MD5) higaki2.pdf: 12803193 bytes, checksum: 37bab41412e59f59a65d5f561cd8725a (MD5) Previous issue date: 1996-11-28主1-参1工学_機械科

関節潤滑における摩擦系構成成分の役割に関する実験的研究

1章 緒言 2章 生体関節の構造と構成成分 3章 実験方法 4章 実験結果 5章 結論主1-参1工学_機械科

Dynamic hip kinematics during recreational classical ballet and hula dance after total hip arthroplasty: two case reports

Abstract Background The in vivo assessment of the three-dimensional kinematics of the hip during dance activities in patients after total hip arthroplasty has not been previously reported. We evaluated the replaced hip kinematics during recreational classical ballet and hula dance using radiographic-based image-matching techniques. Case presentation A 58-year-old Japanese woman (patient 1; height, 157 cm; weight, 74.5 kg) and a 73-year-old Japanese woman (patient 2; height, 153 cm; weight, 48 kg) were still doing classical ballet and hula dance, respectively, after primary total hip arthroplasty. For ballet, there were gradual three-dimensional hip movements with 48° flexion, 36° abduction, and 49° external rotation in développé and 34° flexion, 29° abduction, and 43° external rotation in plié. For hula, there were small three-dimensional hip movements with 31° flexion, 15° adduction, and 11° external rotation in kao and 17° flexion, 11° adduction, and 11° external rotation in kaholo. No liner-to-neck contact was found in any dance activities. Conclusion Both classical ballet and hula dance produced complex ranges of hip movements and activity-dependent kinematics. These kinematic data could be useful for recommending each patient with total hip arthroplasty to continue recreational dance activities

Kinematic Analysis of Healthy Hips during Weight-Bearing Activities by 3D-to-2D Model-to-Image Registration Technique

Dynamic hip kinematics during weight-bearing activities were analyzed for six healthy subjects. Continuous X-ray images of gait, chair-rising, squatting, and twisting were taken using a flat panel X-ray detector. Digitally reconstructed radiographic images were used for 3D-to-2D model-to-image registration technique. The root-mean-square errors associated with tracking the pelvis and femur were less than 0.3 mm and 0.3° for translations and rotations. For gait, chair-rising, and squatting, the maximum hip flexion angles averaged 29.6°, 81.3°, and 102.4°, respectively. The pelvis was tilted anteriorly around 4.4° on average during full gait cycle. For chair-rising and squatting, the maximum absolute value of anterior/posterior pelvic tilt averaged 12.4°/11.7° and 10.7°/10.8°, respectively. Hip flexion peaked on the way of movement due to further anterior pelvic tilt during both chair-rising and squatting. For twisting, the maximum absolute value of hip internal/external rotation averaged 29.2°/30.7°. This study revealed activity dependent kinematics of healthy hip joints with coordinated pelvic and femoral dynamic movements. Kinematics’ data during activities of daily living may provide important insight as to the evaluating kinematics of pathological and reconstructed hips