Min Woo-Kie, Lee Chang-Hwa
Department of Orthopedic Surgery, College of Medicine, Kyungpook National University, Daegu, Korea.
J Spinal Disord Tech. 2014 May;27(3):162-5. doi: 10.1097/BSD.0b013e31829c07a4.
This study was retrospectively conducted on 51 patients with L5-S1 spondylolisthesis.
This study was conducted to compare a total of 11 pelvic parameters, such as the level of displacement by Meyerding method, lumbar lordosis, sacral inclination, lumbosacral angle, slip angle, S2 inclination, pelvic incidence (PI), L5 inclination, L5 slope, pelvic tilt (PT), and sacral slope (SS) between low-grade and high-grade spondylolisthesis, and to investigate a correlation of the level of displacement by Meyerding method with other pelvic parameters.
Pelvic parameters were measured using preoperational erect lateral spinal simple radiographs. The patients were divided into 39 patients with low-grade spondylolisthesis and 12 patients with high-grade spondylolisthesis before analysis. In all patients of both groups, 11 radiographic measurements including the level of displacement by Meyerding method, lumbar lordosis, sacral inclination, lumbosacral angle, slip angle, S2 inclination, PI, L5 inclination, L5 slope, PT, and SS were performed. T test and Pearson correlation analysis were conducted to compare and analyze each measurement.
As for the comparison between the 2 groups, a statistically great significance in the level of displacement by Meyerding method, lumbosacral angle, slip angle, L5 incidence, PI, and L5 slope (P≤0.001) was shown. Meanwhile, a statistical significance in the sacral inclination and PT (P<0.05) was also shown. However, no statistical significance in the S2 incidence and SS was shown. A correlation of the level of displacement by Meyerding method with each parameter was analyzed in the both the groups. A high correlation was observed in the lumbar lordosis, lumbosacral angle, slip angle, L5 incidence, and L5 slope (Pearson correlation coefficient, P=0.01), as well as the sacral inclination, PI, and PT (Pearson correlation coefficient, P=0.05). Meanwhile, no correlation was shown in the S2 incidence and SS.
A significant difference in the lumbosacral angle, slip angle, L5 incidence, PI, L5 slope, sacral inclination, and PT was shown between the patients with high-grade spondylolisthesis and patients with low-grade spondylolisthesis. Among the aforementioned measurements, the PI showed a significant difference between the 2 groups and also had a significant correlation with the dislocation level in all the patients.
本研究对51例L5 - S1椎体滑脱患者进行回顾性研究。
本研究旨在比较总共11项骨盆参数，如Meyerding法移位程度、腰椎前凸、骶骨倾斜度、腰骶角、滑脱角、S2倾斜度、骨盆入射角（PI）、L5倾斜度、L5斜率、骨盆倾斜（PT）和骶骨斜率（SS）在低度和高度椎体滑脱之间的差异，并研究Meyerding法移位程度与其他骨盆参数之间的相关性。
使用术前站立位脊柱侧位简易X线片测量骨盆参数。在分析前，将患者分为39例低度椎体滑脱患者和12例高度椎体滑脱患者。对两组所有患者进行11项影像学测量，包括Meyerding法移位程度、腰椎前凸、骶骨倾斜度、腰骶角、滑脱角、S2倾斜度、PI、L5倾斜度、L5斜率、PT和SS。进行t检验和Pearson相关性分析以比较和分析各项测量结果。
两组比较显示，Meyerding法移位程度、腰骶角、滑脱角、L5入射角、PI和L5斜率有统计学意义上的显著差异（P≤0.001）。同时，骶骨倾斜度和PT也有统计学意义（P<0.05）。然而，S2入射角和SS无统计学意义。在两组中分析了Meyerding法移位程度与各参数的相关性。在腰椎前凸、腰骶角、滑脱角、L5入射角和L5斜率（Pearson相关系数，P = 0.01）以及骶骨倾斜度、PI和PT（Pearson相关系数，P = 0.05）中观察到高度相关性。同时，S2入射角和SS无相关性。
高度椎体滑脱患者与低度椎体滑脱患者在腰骶角、滑脱角、L5入射角、PI、L5斜率、骶骨倾斜度和PT方面存在显著差异。在上述测量中，PI在两组之间显示出显著差异，并且在所有患者中与脱位程度也有显著相关性。
