The Relevant Anatomical Data Measurement and Clinical Significance of the Bucking Bar System of the Anterior Surface of the Axis

Abstract：Objective To measure the relevant anatomical data of the bucking bar syetem of the anterior surface of the axis and explore its clinical significance and provide data support for designing bucking bar system.Methods 100 patients aged 18 and older underwent CT 3D reconstruction of cervical spine in our hospital were enrolled in this study from January 2013 to December 2016.There were 51 males and 49 females.They were 28 to 85 years old,with the aver-age age of(56.4±6.2).Their height was 150.0 cm to 178.0 cm,and the average height was(161.7±6.6)cm.Three-di-mensional images and the anterior surface images of the axis were acquired through MPR and 3D reconstruction tech-niques.The following parameter were measured:A,The distance between bilateral superiorarticular process and the mi-gration of the anterior surface of the axis;B,The distance between the midpoint of line A and midpoint of lineC;C,The width of the anterior lip of the axis;D,The distance between the vertex of the bilateral depression in the anterior surface of the axis;E,The vertical distance from line B to line D.Are there differences in the above five sets of data between males and females,the height is greater than 160cm and height is less than or equal to 160cm.At the same time,analy-zing the correlation of the above five sets of data and gender,height.Results Line A:(12.7 ±2.1)mm;Line B:(14.4± 1.3)mm;Line C:(15.8±1.5)mm;Line D:(19.3±1.6)mm;Line E:(5.8±0.6)mm.There were statistically significant differences in the above five sets of data between males and females,patients higher than 160cm and less than or equal to 160cm(P< 0.01),and there were obvious correlation of the above five sets of data and gender,height.Conclusion a)There are obvious differencesin the anterior surface morphologyof the axis due to the height and gender.b)The buc-king bar system should be designed according to the anatomical data of the anterior surface of the axis to increase the a-daptability and to reduce the related complications.