title: Biomechanical analysis of four different fixations for the posterolateral shearing tibial plateau fracture.
abstract: The posterolateral shearing tibial plateau fracture is uncommon in the literature, however with the increased usage of computer tomography (CT), the incidence of these fractures is no longer as low as previously thought. Few studies have concentrated on this fracture, least of all using a biomechanical model. The purpose of this study was to compare and analyse the biomechanical characteristics of four different types of internal fixation to stabilise the posterolateral shearing tibial plateau fracture. Forty synthetic tibiae (Synbone, right) simulated the posterolateral shearing fracture models and these were randomly assigned into four groups; Group A was fixed with two anterolateral lag screws, Group B with an anteromedial Limited Contact Dynamic Compression Plate (LC-DCP), Group C with a lateral locking plate, and Group D with a posterolateral buttress plate. Vertical displacement of the posterolateral fragment was measured using three different strengths of axial loading force, and finally loaded until fixation failure. It was concluded that the posterolateral buttress plate is biomechanically the strongest fixation method for the posterolateral shearing tibial plateau fracture.
authors.affiliation: Department of Orthopaedic Surgery, Shanghai Sixth People's Hospital, Shanghai JiaoTong University, 600 Yishan Road, Shanghai, 200233, China. zw_850228528@126.com
authors.forename: Wei
authors.initials: W
authors.lastname: Zhang
authors.forename: Cong-Feng
authors.initials: CF
authors.lastname: Luo
authors.forename: Sven
authors.initials: S
authors.lastname: Putnis
authors.forename: Hui
authors.initials: H
authors.lastname: Sun
authors.forename: Zhi-Min
authors.initials: ZM
authors.lastname: Zeng
authors.forename: Bing-Fang
authors.initials: BF
authors.lastname: Zeng
mesh_terms: D001696:Biomechanical Phenomena; D017760:Bone Malalignment / Q000209:etiology / Q000503:physiopathology / Q000601:surgery*; D001860:Bone Plates; D001863:Bone Screws; D018786:Bone Substitutes; D005593:Fracture Fixation, Internal / Q000295:instrumentation / Q000379:methods; D006801:Humans; D008954:Models, Biological; D011475:Prosthesis Failure; D013314:Stress, Mechanical; D013977:Tibia / Q000293:injuries / Q000503:physiopathology / Q000601:surgery*; D013978:Tibial Fractures / Q000150:complications / Q000503:physiopathology / Q000601:surgery*
chemical_list: D018786:Bone Substitutes