A Novel Anatomical Locking Plate Fixation for T-Shaped Acetabular Fracture: Finite Element Analysis

Jianfeng Zhou MS, Xiang Wang MS, Gongzi Zhang MS, Xiuyun Su, Jiantao Li MS, Shuwei Zhang MS, Peifu Tang and Lihai Zhang*

Department of Orthopedics, General Hospital of Chinese PLA, China
Both authors equally contributed

^*Correspondance to: Peifu Tang 

 PDF  Full Text DOI: 10.25107/2474-1647.2319

Abstract

Purposes: To compare the biomechanical stability of the plate and eight different kinds of internal fixation for T-shaped acetabular fracture using finite element analysis.Methods: Finite element models of T-shaped acetabular fractures were created in this study based on CT data from fourth-generation synthetic sawbones. Nine different fixation models, including the novel anatomical locking plate and eight other internal fixations were established. The biomechanical tests were compared. We recorded and analyzed the anterior, posterior and inferior displacements of nine finite element models after applying the same load.Results: The anterior displacement, posterior displacement and inferior displacement fixed by the novel anatomical locking plate were 0.2805 mm, 0.3177 mm and 0.6842 mm, respectively. The smallest and largest anterior displacements of the nine models were found with 7.3 mm anterior lag screws plus a posterior locking plate and 5.5 mm anterior lag screws plus a posterior reconstruction plate, respectively. The smallest and largest posterior displacements of the nine models were found with the novel anatomical locking plate and 5.5 mm anterior lag screws plus a posterior reconstruction plate, respectively. The smallest and largest inferior displacements of the nine models were found with the novel anatomical locking plate and 5.5 mm anterior lag screws plus a posterior reconstruction plate, respectively. Regarding the fixations by the same reconstruction or locking plate, the magnitude of displacement increased as the diameter of the lag screw decreased. With the same diameter screws, the whole displacements of the models fixed by locking plates were smaller than those fixed by reconstruction plates.Conclusion: The stability of the novel anatomy locking plate provides sufficient stabilization and resembles other fixation instructions for the fixation of T-shaped acetabular fractures.

Keywords

Acetabular fracture; Finite element analyze; Anatomy locking plate; Anterior column lag screw

Cite the article

Jianfeng Zhou MS, Xiang Wang MS, Gongzi Zhang MS, Su X, Jiantao Li MS, Shuwei Zhang MS, et al. A Novel Anatomical Locking Plate Fixation for T-Shaped Acetabular Fracture: Finite Element Analysis. Clin Surg. 2019; 4: 2319.