Taguchi Manabu, Zhao Chunfeng, Zobitz Mark E, An Kai-Nan, Amadio Peter C
Biomechanics Laboratory, Division of Orthopedic Research, Mayo Clinic College of Medicine, Rochester, MN 55905, USA.
J Hand Surg Am. 2006 Jan;31(1):113-7. doi: 10.1016/j.jhsa.2005.09.002.
To evaluate the effect of ulnar deviation of the finger on gliding resistance of the flexor digitorum profundus tendon within the A1 and A2 pulley complex.
Thirty-two human cadaveric fingers (index through small fingers) were used. The gliding resistance was measured at 5 different angles of ulnar deviation (0 degrees, 15 degrees, 30 degrees, 45 degrees, 60 degrees).
There was a significant increase in gliding resistance with increased ulnar deviation. The gliding resistances at 0 degrees, 15 degrees, 30 degrees, 45 degrees, and 60 degrees of ulnar deviation were 0.40+/-0.13 N, 0.44+/-0.13 N, 0.55+/-0.17 N, 0.74+/-0.21 N, and 1.02+/-0.30 N, respectively. The gliding resistance at 60 degrees was significantly greater than at all other angles; 45 degrees ulnar deviation had significantly higher gliding resistance than 0 degrees, 15 degrees, and 30 degrees; and 30 degrees ulnar deviation had significantly higher gliding resistance than 0 degrees.
A greater angle of ulnar deviation causes higher gliding resistance during motion of the flexor digitorum profundus tendon within the A1 and A2 pulley complex. The gliding resistance increases significantly at angles greater than 30 degrees of ulnar deviation. The increased tendon loading needed to overcome increased gliding resistance caused by ulnar deviation could result in a vicious cycle of progressive ulnar deviation. Although mild degrees of ulnar deviation may be well tolerated mechanically a reasonable therapeutic guideline might be to prevent deviation from exceeding 30 degrees.
评估手指尺侧偏斜对指深屈肌腱在A1和A2滑车复合体中滑动阻力的影响。
使用32根人尸体手指（示指至小指）。在5个不同的尺侧偏斜角度（0度、15度、30度、45度、60度）下测量滑动阻力。
随着尺侧偏斜角度增加，滑动阻力显著增加。尺侧偏斜0度、15度、30度、45度和60度时的滑动阻力分别为0.40±0.13N、0.44±0.13N、0.55±0.17N、0.74±0.21N和1.02±0.30N。60度时的滑动阻力显著大于所有其他角度；45度尺侧偏斜时的滑动阻力显著高于0度、15度和30度；30度尺侧偏斜时的滑动阻力显著高于0度。
在A1和A2滑车复合体内，指深屈肌腱运动期间，更大的尺侧偏斜角度会导致更高的滑动阻力。尺侧偏斜角度大于30度时，滑动阻力显著增加。克服由尺侧偏斜引起的增加的滑动阻力所需的增加的肌腱负荷可能导致尺侧偏斜进展的恶性循环。尽管轻度尺侧偏斜在力学上可能耐受性良好，但合理的治疗指南可能是防止偏斜超过30度。
