title: New fracture pattern focusing on implant fracture for periprosthetic femoral fractures.
abstract: OBJECTIVE
  The Vancouver Classification System (VCS) for assessing periprosthetic femoral fractures has become universally accepted. The Unified Classification System (UCS) has expanded upon and updated the VCS and applied treatment principles to all periprosthetic fractures. However, periprosthetic femoral fractures accompanied by stem fracture after hip arthroplasty were not classifiable under the original VCS or the UCS.
  
  
  RESULTS
  Our new fracture pattern is based on the periprosthetic femoral fracture as well as stem fracture after hip arthroplasty, and its treatment is dependent upon the stability of the proximal portion of the fractured femoral prosthesis.
  
  
  CONCLUSIONS
  We believe that our new fracture pattern, a supplement to the VCS and UCS, is useful in the establishment of a therapeutic strategy for periprosthetic femoral fractures.
authors.affiliation: Department of Orthopedics, The First Affiliated Hospital of Zhejiang Chinese Medical University, 54 Youdian Road, Shangcheng District, Hangzhou, 310006, China, 40983285@qq.com.
authors.forename: Jie-Feng
authors.initials: JF
authors.lastname: Huang
authors.forename: Jian-Jian
authors.initials: JJ
authors.lastname: Shen
authors.forename: Jun-Jie
authors.initials: JJ
authors.lastname: Chen
authors.forename: Yang
authors.initials: Y
authors.lastname: Zheng
authors.forename: Wen-Xi
authors.initials: WX
authors.lastname: Du
authors.forename: Fu-Cun
authors.initials: FC
authors.lastname: Liu
authors.forename: Pei-Jian
authors.initials: PJ
authors.lastname: Tong
mesh_terms: D019644:Arthroplasty, Replacement, Hip / Q000009:adverse effects*; D016208:Databases, Factual; D005264:Femoral Fractures / Q000145:classification* / Q000601:surgery; D005269:Femur / Q000293:injuries / Q000601:surgery; D006622:Hip Prosthesis / Q000009:adverse effects*; D006801:Humans; D057068:Periprosthetic Fractures / Q000145:classification* / Q000601:surgery; D011475:Prosthesis Failure; D012189:Retrospective Studies