title: Three-fin acetabular prosthesis for superior acetabular bone defects: a three-dimensional finite element analysis.
abstract: BACKGROUND
  Given that three-dimensional finite element models have been successfully used to analyze biomechanics in orthopedics-related research, this study aimed to establish a finite element model of the pelvic bone and three-fin acetabular component and evaluate biomechanical changes in this model after implantation of a three-fin acetabular prosthesis in a superior segmental bone defect of the acetabulum.
  
  
  METHODS
  In this study, three-dimensional finite element models of the pelvic bone and three-fin acetabular component were first established. The prosthesis model was characterized by three different conformational fins to facilitate and optimize the prosthetic design. The spongy and cortical bones were evaluated using a different modulus of elasticity in this established model.
  
  
  RESULTS
  The maximum and minimum von Mises stresses on the fins of the acetabular component were 15.2 and 0.74, respectively. The maximum and minimum micromotion between the three-fin acetabular component and the acetabulum bone interface were 27 and 13 µm, respectively. A high primary stability and implied better clinical outcome were revealed.
  
  
  CONCLUSIONS
  Finite element analysis may be an optimal strategy for biomechanics-related research of prosthetic design for segmental acetabular bone defects.
authors.affiliation: Department of Orthopedics, Beijing Chaoyang Hospital, Capital Medical University, Beijing 100020, China.
authors.forename: Yu-zeng
authors.initials: YZ
authors.lastname: Liu
authors.forename: Yong
authors.initials: Y
authors.lastname: Hai
authors.forename: Hui
authors.initials: H
authors.lastname: Zhao
mesh_terms: D000077:Acetabulum / Q000601:surgery; D020342:Finite Element Analysis; D006622:Hip Prosthesis; D006801:Humans; D010384:Pelvic Bones / Q000601:surgery