Tan L, Bai X, Li D
Department of Radiology, Second Affiliated Hospital, Hunan Medical University, Changsha.
Hunan Yi Ke Da Xue Xue Bao. 1997;22(4):327-9.
To assess the possible correlation between the shape and the direction of the small articular surface in the lower lumbar vertebrae and the degeneration of the intervertebral disc, we investigated with computed tomography (CT) and evaluated with statistics the small articular surface and the transverse interface-joint angle (TIFA) of the L4-5 and the L5-S1 in 152 cases who had normal or degenerative discs verified through CT, MRI or operation. The small articular surface was found arc in 69.1% of the L4-5 and in 23.0% of the L5-S1. The TIFA of the L4-5 was less than that of the L5-S1. There was no correlation between the ratio of degeneration of the intervertebral disc at the L4-5 and the TIFA of the L4-5 and the L5-S1, but the ratio of degeneration of the intervertebral disc at the L5-S1 had postive correlation with the TIFA of the L4-5, negative correlation with the TIFA of the L5-S1, and particular correlation with the TIFA of the L5-S1 and L4-5. These results suggest that the shape and direction of the lower lumbar facet joint are related to the lumbar degeneration of intervertebral disc and the causes of degeneration at the L4-5 disc differ from those at the L5-S1 disc in biomechanics.
为了评估下腰椎小关节面的形状和方向与椎间盘退变之间的可能相关性，我们对152例经CT、MRI或手术证实椎间盘正常或退变的患者进行了计算机断层扫描（CT）检查，并对L4-5和L5-S1的小关节面及横界面关节角（TIFA）进行了统计学评估。结果发现，L4-5小关节面呈弧形的占69.1%，L5-S1小关节面呈弧形的占23.0%。L4-5的TIFA小于L5-S1的TIFA。L4-5椎间盘退变率与L4-5及L5-S1的TIFA之间无相关性，但L5-S1椎间盘退变率与L4-5的TIFA呈正相关，与L5-S1的TIFA呈负相关，且与L5-S1和L4-5的TIFA有特定相关性。这些结果表明，下腰椎小关节突关节的形状和方向与腰椎间盘退变有关，且L4-5椎间盘退变的生物力学原因与L5-S1椎间盘不同。
