The study of screw placement parameters for Ogawa type I acromial fractures by 3D simulation

Journal of Orthopaedic Surgery and Research

Weiyan Li¹  Wei Zhang²  Xiaofei Yang²  Zhongye Sun²  Shizhang Han²  Bei Zhao²  Jun Yan²  Liren Han² 

[1] Department of Orthopaedics, Gaotang People’s Hospital;Department of Orthopaedics, Liaocheng People’s Hospital;

关键词: Acromion;    Screw fixation;    Axial perspective;    3D technology;   

DOI  :  10.1186/s13018-021-02416-3

来源: DOAJ

【 摘 要 】

Abstract Background Acromial fractures are rare and there is no consensus on fixation, but an increasing number of studies have reported using two screws to fix Ogawa type I acromial fractures. The objective of this study was to obtain the ideal length, diameter, insertion point, and angle of the screw using a novel 3D simulation. Methods The scapular CT data of 100 individuals were obtained to reconstruct 3D models. The transparency of the 3D model was then downgraded along the axial perspective (the view perpendicular to the cross section of the acromion axis) to find the maximum translucent area. Two virtual screws were placed at the anterior edge of the acromion until they penetrated the posterior cortical bon. The largest diameters and lengths of the screw were measured, and the direction and insertion point of the screw were observed. Results The mean maximum lengths of the medial and lateral screws were 43.33 ± 6.17 mm and 39.23 ± 6.01 mm, respectively. The mean maximum diameters of the medial and lateral screws were 4.71 ± 1.23 mm and 4.97 ± 1.07 mm, respectively. Differences in screw length, diameter, and insertion point between males and females were found. The differences in screw angle between sexes were not statistically significant. Conclusions Based on a 3D model test, we recommend the size, entry points, and angles of screws for Ogawa type I acromial fractures, providing valuable guidance for clinical work. More accurate screw parameters can be obtained preoperatively by establishing an individualized 3D model.

【 授权许可】

Unknown