Hayes M A, Howard T C, Gruel C R, Kopta J A
Orthopaedic Specialists of Tulsa, Oklahoma.
Spine (Phila Pa 1976). 1989 Mar;14(3):327-31. doi: 10.1097/00007632-198903000-00014.
An experimental clinical study of angulatory and translational lumbar spine intervertebral motion was performed using flexion-extension radiographs obtained in the lateral plane. These "bending" films were obtained from 59 asymptomatic individuals undergoing routine pre-employment examination. Results indicate that there is 7 to 14 degrees of angulatory motion present in the lumbar spine but a large range of values exist so that norms of angulatory motion cannot be more precisely defined. There are 2 to 3 mm of translational motion present in the lumbar spine at each intervertebral level. Twenty percent of this study's asymptomatic subjects had 4 mm or more translational motion at the L4-5 interspace and at least 10% had 3 mm or greater motion at all levels except L5-S1. These results challenge conclusions based on earlier studies and call into question the use of lumbar flexion-extension bending films as a primary determinant of lumbar segmental stability.
利用在侧位平面获得的屈伸位X线片，对腰椎椎间的角度和移位运动进行了一项实验性临床研究。这些“弯曲”片来自59名接受常规入职前检查的无症状个体。结果表明，腰椎存在7至14度的角度运动，但存在很大的数值范围，因此角度运动的规范无法更精确地界定。腰椎每个椎间水平存在2至3毫米的移位运动。本研究中20%的无症状受试者在L4 - 5间隙有4毫米或更大的移位运动，并且除L5 - S1外，至少10%的受试者在所有水平有3毫米或更大的运动。这些结果对基于早期研究得出的结论提出了挑战，并质疑将腰椎屈伸弯曲片用作腰椎节段稳定性的主要决定因素的做法。
