腰椎椎弓根通道不同头尾偏角方向变化规律的数字解剖学特点  

Digital anatomy characteristics of the changing regularity of lumbar pedicle channel in different angles of sagittal plane direction

作　　者：李严兵[1] 王平山[2] 张元智[3] 宋磊[4] 谢叻[5] 唐雷[1] 钟世镇[1] 

机构地区：[1]南方医科大学广东省医学生物力学重点实验室,广东省广州市510515 [2]解放军济南军区总医院骨创伤外科,山东省济南市250031 [3]南方医科大学南方医院创伤骨科,广东省广州市510515 [4]解放军第八十九医院骨科,山东省潍坊市261000 [5]上海交通大学国家数字化制造技术中心,上海市200030

出　　处：《中国组织工程研究与临床康复》2007年第5期893-896,I0002,共5页Journal of Clinical Rehabilitative Tissue Engineering Research

基　　金：湖南省自然科学基金资助项目(02JJY2028);国家自然科学基金资助项目(30371449)~~

摘　　要：目的:观察个体化腰椎椎弓根通道在外偏角不变而不同头尾偏角方向的变化规律。方法:实验于2005-09/2006-09在广东省医学生物力学重点实验室完成。选取1例健康成人腰椎CT连续扫描数据集,应用Mimics8.11三维重建腰椎数字解剖模型,将腰椎数字模型导入Surface10.0,获得椎弓根通道的正投影区内边界及其正投影区内边界内、外切圆,获得内切圆经椎板、椎弓根与椎体的通道长度,获取各内、外切圆半径大小,对获取相关数据进行定量分析与椎弓根通道的可视化显示。结果:①内切圆半径:L1～5左右椎弓根通道正投影区内切圆半径在设定头尾偏角大小范围内变化不明显,左侧内切圆半径分别为(3.01±0.02),(3.89±0.03),(4.13±0.04),(5.16±0.43),(5.37±0.73)mm,右侧分别为(3.49±0.03),(4.34±0.06),(4.55±0.13),(5.26±0.36),(5.27±0.83)mm。②外切圆半径:L1～5左右椎弓根通道正投影区外切圆半径在设定头尾偏角大小范围内变化不明显,左侧外切圆半径分别为(7.22±0.81),(7.96±0.43),(8.04±0.34),(8.15±0.21),(11.00±0.40)mm,右侧分别为(7.82±0.55),(8.03±0.26),(7.76±0.40),(7.81±0.29),(10.77±0.30)mm。③通道长度:L1～5左右椎弓根通道正投影区内切圆通道长度随头尾角度的增大呈逐渐增大而后又逐渐减小趋势,左侧通道长度分别为(40.49±6.73),(41.49±6.12),(42.02±7.55)(37.02±7.58),(38.87±10.37)mm,右侧分别为(38.08±6.33),(41.16±5.03),(42.01±6.53),(37.94±7.71),(37.66±4.32)mm。结论:腰椎椎弓根通道大小是随头尾偏角方向不同而不同的连续动态变化过程,应用数字技术可以获得其通道大小连续动态的变化规律,临床应用选择合适直径、长度大小的螺钉及确定最佳进钉方向需要依循这一规律。AIM： To investigate the changing regularity of lumbar pedicle channel in different angles of sagittal plane direction. METHODS： The experiment was completed in the Guangdong Province Medicine Biology Mechanics Key Laboratory from September 2005 to September 2006. Lumbar CT scan images of one healthy adult were digitally analyzed to prepare their three-dimensional models by Mimics 8.11 software. These models were imported into Surface 10.0 software to harvest the inner borderline of orthogonal projection region and the inscribed circle and circumcircle of each inner borderline. The channel length of inscribed circle across the vertebral plate, pedicle, and centrum and the radius of the inscribed circle and circumcircle were measured. All the data were quantitatively analyzed and the visible display of lumbar pedicle channel was performed. RESULTS： （1）Radius of the inscribed circle： The radius of L1-5 lumbar hardly changed during the designed angles of sagittal plane.The radiuses of the left inscribed circle were （3.01±0.02）, （3.89±0.03）, （4.13±0.04）, （5.16±0.43）, （5.37± 0.73） mm; the radiuses of the right were （3.49±0.03）, （4.34±0.06）, （4.55±0.13）, （5.26±0.36）, （5.27±0.83） mm. （2）Radius of the circumcircle： The radius of each inner borderline of L1-5 lumbar hardly changed during the designed angels of sagittal plane. The radiuses of the left circumcircle were （7.22±0.81）, （7.96±0.43）, （8.04±0.34）, （8.15±0.21）, （11.00±0.40） mm; the radiuses of the right were （7.82±0.55）, （8.03±0.26）, （7.76±0.40）, （7.81±0.29）, （10.77±0.30） mm. （3）Channel length of the inscribed circle： The channel length of the inscribed circle of each inner borderline across pedicle from the first to fifth lumbar gradually increased at first, and then decreased subsequently with the increased angle of sagittal plane. The channel lengths of the left were （40.49±6.73）, （41.49±6.12）, （42.02±7.55）, （37.02±7.5

关 键 词：腰椎 椎弓根通道 头尾偏角 数字解剖 

分 类 号：R318.1[医药卫生—生物医学工程]