中国组织工程研究2012，Vol.16Issue(9)：1526-1529,4.DOI:10.3969/j.issn.1673-8225.2012.09.002
寰椎椎弓根螺钉置入相关参数的三维CT分析
Three dimensional CT study on relevant parameters of atlas pedicle screw insertion
摘要
Abstract
BACKGROUND: As for studies on entry point and trajectory transverse angle of atlas pedicle screw insertion, different authors obtain different data.OBJECTIVE: To design an ideal route of screw insertion by CT multi-planar reconstruction (MPR), to measure parameters related to atlas pedicle screw insertion, and to evaluate effect of the height of the atlas pedicle screw and variation of atlas ponticulus on the pedicle screw insertion.METHODS: Sixty-two subjects who were performed computed tomography angiography in head and neck without any pathology of craniocervical junction from October 1, 2009 to June 30, 2010 were selected from the picture archiving and communication system. Their axial images were used to reconstruct the images by MPR techniques. The parameters were obtained including the pedicle minimum height, location of optimal insertion point, trajectory transverse angle, the maximum length of the trajectory and the length of trajectory in atlas pedicle. The incidence of atlas ponticulus was analyzed.RESULTS AND CONCLUSION: The minimum height of atlas pedicle was (3.8±0.8) mm in female and (4.4±1.2) mm in male, 91.1% of the subjects were equal to or over 3.0 mm. The distance from screw insertion point to midline was (20.8±1.3) mm in female and (21.7±1.2) mm in male. The trajectory transverse angle was (10.3±2.6)° in female and (10.1 ±2.1)° in male. The maximum length of the trajectory was (26.5±1.8) mm in female and (26.9±1.8) mm in male. The length of trajectory in atlas pedicle was (7.9±1.2) mm in female and (8.0±1.1) mm in male. The incidence of atlas ponticulus was 25.8%, of which type Ⅱ-Ⅳ accounts for 21.0%.It is indicated that the minimum height of atlas pedicle screw and type Ⅱ-Ⅳ posterior ponticulus can directly affect the screw insertion, and MPR imaging can devise the ideal trajectory for pedicle screw insertion, which is necessary for three-dimensional CT anatomical measurement before atlatoaxial joint screw insertion.关键词
寰椎/椎弓根/螺钉固定/三维CT/数字化骨科分类
医药卫生引用本文复制引用
何宏伟,隋桐,赵慧毅,陈丽君,林清池,段少银..寰椎椎弓根螺钉置入相关参数的三维CT分析[J].中国组织工程研究,2012,16(9):1526-1529,4.基金项目
国家自然科学基金项目(30870690). （30870690）
