Humphreys S C, Chase J, Patwardhan A, Shuster J, Lomasney L, Hodges S D
Chattanooga Orthopaedic Group, Foundation for Research, TN 37404, USA.
Arch Phys Med Rehabil. 1998 Sep;79(9):1105-9. doi: 10.1016/s0003-9993(98)90179-4.
To determine the effects of cervical flexion and traction on foraminal volume and isthmus area at the C5-C6 foraminal space in cadavers.
This study evaluated the foraminal space at C5-C6 in cadaver specimens during flexion and traction of the cervical spine.
An orthopedic biomechanics laboratory and department of radiology of a university medical center.
Nine cadaver cervical spines, C1 through T3, were used in the study. Superficial tissues were dissected, preserving the ligaments.
Proximal and distal portions of the cadaver spines were potted using bone cement. Spines were mounted and imaged with computed tomography in neutral position, 15 degrees of flexion, and maximum flexion with and without 25lbs of axial traction.
The areas and volumes of the foramen were measured and calculated.
Flexion alone significantly increased the foraminal volume and isthmus area at C5-C6. Traction resulted in little additional change.
For cervical spines with mild to moderate degenerative changes at C5-C6, cervical flexion with or without traction produces significant increases in foraminal volume and area at the foraminal isthmus.
确定颈椎前屈和牵引对尸体C5 - C6椎间孔空间的椎间孔容积和峡部面积的影响。
本研究评估了颈椎在屈曲和牵引过程中尸体标本C5 - C6的椎间孔空间。
一所大学医学中心的骨科生物力学实验室和放射科。
本研究使用了9具C1至T3的尸体颈椎。解剖了浅表组织，保留了韧带。
使用骨水泥将尸体脊柱的近端和远端部分进行固定。将脊柱安装好，并在中立位、15度屈曲位以及有和没有25磅轴向牵引的最大屈曲位进行计算机断层扫描成像。
测量并计算椎间孔的面积和容积。
单纯前屈显著增加了C5 - C6的椎间孔容积和峡部面积。牵引导致的额外变化很小。
对于C5 - C6有轻度至中度退行性改变的颈椎，无论有无牵引，颈椎前屈都会使椎间孔容积和椎间孔峡部面积显著增加。
