title: Newly designed anterolateral and posterolateral locking anatomic plates for lateral tibial plateau fractures: a finite element study.
abstract: BACKGROUND
  Lateral column tibial plateau fracture fixation with a locking screw plate has higher mechanical stability than other fixation methods. The objectives of the present study were to introduce two newly designed locking anatomic plates for lateral tibial plateau fracture and to demonstrate their characteristics of the fixation complexes under the axial loads.
  
  
  METHODS
  Three different 3D finite element models of the lateral tibial plateau fracture with the bone plates were created. Various axial forces (100, 500, 1000, and 1500 N) were applied to simulate the axial compressive load on an adult knee during daily life. The equivalent maps of displacement and stress were output, and relative displacement was calculated along the fracture lines.
  
  
  RESULTS
  The displacement and stresses in the fixation complexes increased with the axial force. The equivalent displacement or stress map of each fixation under different axial forces showed similar distributing characteristics. The motion characteristics of the three models differed, and the max-shear stress of trabecula increased with the axial load.
  
  
  CONCLUSIONS
  These two novel plates could fix lateral tibial plateau fractures involving anterolateral and posterolateral fragments. Motions after open reduction and stable internal fixation should be advised to decrease the risk of trabecular microfracture. The relative displacement of the posterolateral fragments is different when using anterolateral plate and posterolateral plate, which should be considered in choosing the implants for different posterolateral plateau fractures.
authors.affiliation: Department of Orthopedics, Xinhua Hospital affiliated to Shanghai Jiaotong University School of Medicine, No. 1665 Kongjiang Road Yangpu District, Shanghai, 200092, China.
authors.forename: Pengbo
authors.initials: P
authors.lastname: Chen
authors.affiliation: Department of Orthopedics, Xinhua Hospital affiliated to Shanghai Jiaotong University School of Medicine, No. 1665 Kongjiang Road Yangpu District, Shanghai, 200092, China.
authors.forename: Hua
authors.initials: H
authors.lastname: Lu
authors.affiliation: Department of Orthopedics, Xinhua Hospital affiliated to Shanghai Jiaotong University School of Medicine, No. 1665 Kongjiang Road Yangpu District, Shanghai, 200092, China. 13917481191@163.com.
authors.forename: Hao
authors.initials: H
authors.lastname: Shen
authors.affiliation: Department of Orthopedics, Xinhua Hospital affiliated to Shanghai Jiaotong University School of Medicine, No. 1665 Kongjiang Road Yangpu District, Shanghai, 200092, China.
authors.forename: Wei
authors.initials: W
authors.lastname: Wang
authors.affiliation: Department of Orthopedics, Xinhua Hospital affiliated to Shanghai Jiaotong University School of Medicine, No. 1665 Kongjiang Road Yangpu District, Shanghai, 200092, China.
authors.forename: Binbin
authors.initials: B
authors.lastname: Ni
authors.affiliation: Department of Orthopedics, Xinhua Hospital affiliated to Shanghai Jiaotong University School of Medicine, No. 1665 Kongjiang Road Yangpu District, Shanghai, 200092, China.
authors.forename: Jishizhan
authors.initials: J
authors.lastname: Chen
mesh_terms: D000328:Adult; D001860:Bone Plates; D020342:Finite Element Analysis; D005593:Fracture Fixation, Internal / Q000295:instrumentation* / Q000379:methods; D006801:Humans; D007719:Knee Joint / Q000503:physiopathology; D008297:Male; D008422:Materials Testing / Q000379:methods; D008953:Models, Anatomic; D011474:Prosthesis Design; D013314:Stress, Mechanical; D013978:Tibial Fractures / Q000000981:diagnostic imaging / Q000601:surgery*; D014057:Tomography, X-Ray Computed; D016474:Weight-Bearing
keywords: Equivalent map; Finite element; Locking anatomic plate; Relative displacement