Ⅱ型齿状突骨折的解剖影响因素的研究

Study On Anatomical Influencing Factors Of Ⅱ Odontoid Fracture

目的:通过测量齿状突部分解剖参数,探究齿状突Ⅱ型骨折的解剖影响因素。方法:选择25份正常解剖结构的齿状突CT影像学资料,24份Ⅱ型齿状突骨折且骨折移位<2mm的CT影像学资料。使用PACS影像系统的测量标尺测量齿状突后倾角、侧倾角以及齿状突基底部横径和前后径。比较两组资料解剖参数的差异。结果:正常成人齿状突后倾角17.56±1.61度,左侧倾角118.84±2.78度,右侧倾角119.13±3.04度,齿状突基底部横径9.73±0.98mm,齿状突基底部前后径11.97±0.96mm。发生Ⅱ型骨折齿状突后倾角度15.13±1.35度,左侧倾角117.97±2.66度,右侧倾角119.35±2.13度,骨折齿状突基底部横径9.82±1.21mm,骨折齿状突基底部前后径9.46±0.89mm。结论:Ⅱ型齿状突骨折的发生与齿状突后倾角有关,后倾角度越小越容易发生骨折。Ⅱ型齿状突骨折的发生与齿状突基底部的前后径有关,前后径距离越小越容易发生骨折。Ⅱ型齿状突骨折的发生与左右侧倾角和基底部横径无关。

Objective: By measuring the some anatomical parameters of odontoid process,and to explore the anatomical factors of odontoid type Ⅱ fractures. Methods: Choosing 25 cases of odontoid CT imaging data of normal anatomical structures,24 cases of odontoid fracture CT imaging data and fracture displacement<2 mm. The posterior slope angle,the side angle,and the transverse diameter and anteroposterior diameter of the base of odontoid were measured using the measurement scale of the PACS imaging system. And comparing the diffe differences between the two groups.Results: The posterior slope angle of normal anatomical structures was 17.56±1.61 °,the left side angle was 118.84±2.78 °,the right side angle was 119.13±3.04°,the transverse diameter of the base of odontoid was 9.73±0.98 mm,the anteroposterior diameter of the base of odontoid was 11.97±0.96 mm. The posterior slope angle of occurrence of II odontoid fracture was 15.13±1.35 °,the left side angle was 117.97±2.66 °,the right side angle was 119.35±2.13°,the transverse diameter of the base of occurrence of fracture of odontoid process was 9.82±1.21 mm,the anteroposterior diameter of the base of odontoid was 9.46±0.89 mm. Conclusion: The occurrence of Ⅱ odontoid fracture is related to the posterior slope angle of odontoid process,the smaller the posterior slope angle is,the more prone to fracture. The occurrence of Ⅱ odontoid fractures is related to the anteroposterior diameter of the base of the odontoid process,the shorter the anteroposterior diameter is,the more prone to fracture. Ⅱ odontoid fractures have nothing to do with the left and right side angle and the transverse diameter of the base of odontoid.