title: Incidence and Risk Period of Periprosthetic Femoral Fracture After Cementless Bipolar Hemiarthroplasty in Elderly Patients.
abstract: The purpose of this study was to investigate the periprosthetic femoral fracture (PFF) after cementless bipolar hemiarthroplasty incidence, noting fracture types and the results of treatment in elderly patients.
  
  
  
  We retrospectively reviewed 1563 elderly patients (1177 women and 386 men) who underwent cementless bipolar hemiarthroplasty for femoral neck fracture (1061 patients) or intertrochanteric fracture (502 patients). The type of fracture was classified according to the Vancouver classification. The average age was 79.6 years (range, 65-103 years). Clinical and radiologic evaluations were performed and Kaplan-Meier survivorship was analyzed.
  
  
  
  Thirty-seven PFFs (2.4%) occurred during a mean follow-up of 44.4 months. Two-thirds of PFFs (67%) occurred within 1 year. Most PFFs (22/27), which occurred within 2 years, were Vancouver type B fractures. After that, type A fractures were predominant (7/9). Based on Kaplan-Meier survivorship with PFF as the end point, the incidence rate was 1.7% (95% confidence interval [CI] = 1.6%-1.8%) at 12 months, 2.2% (95% CI = 2.1%-2.3%) at 36 months, and 3.8 % (95% CI = 3.6%-4.0%) at 144 months postoperatively.
  
  
  
  After cementless bipolar hemiarthroplasty in elderly patients, a caution should be paid to prevent PFF particularly during 1-year postoperatively.
authors.affiliation: Department of Orthopaedic Surgery, Inje University College of Medicine, Seoul Paik Hospital, Seoul, South Korea.
authors.forename: Byung-Ho
authors.initials: BH
authors.lastname: Yoon
authors.affiliation: Department of Orthopaedic Surgery, Seoul National University Bundang Hospital, Seongnam, South Korea.
authors.forename: Young-Kyun
authors.initials: YK
authors.lastname: Lee
authors.affiliation: Department of Orthopaedic Surgery, Seoul National University Bundang Hospital, Seongnam, South Korea.
authors.forename: Woo-Lam
authors.initials: WL
authors.lastname: Jo
authors.affiliation: Department of Orthopaedic Surgery, Chung-Ang University College of Medicine, Seoul, South Korea.
authors.forename: Yong-Chan
authors.initials: YC
authors.lastname: Ha
authors.affiliation: Department of Emergency Medicine, School of Medicine, Dongguk University, Gyeongju-si, South Korea.
authors.forename: Dai-Hai
authors.initials: DH
authors.lastname: Choi
authors.affiliation: Department of Orthopaedic Surgery, Seoul National University Bundang Hospital, Seongnam, South Korea.
authors.forename: Kyung-Hoi
authors.initials: KH
authors.lastname: Koo
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D001843:Bone Cements; D005260:Female; D005265:Femoral Neck Fractures / Q000401:mortality / Q000601:surgery*; D005269:Femur / Q000601:surgery*; D062785:Hemiarthroplasty / Q000009:adverse effects*; D006620:Hip Fractures / Q000601:surgery; D006801:Humans; D015994:Incidence; D053208:Kaplan-Meier Estimate; D008297:Male; D010361:Patients; D057068:Periprosthetic Fractures / Q000401:mortality / Q000601:surgery*; D012189:Retrospective Studies; D012306:Risk
chemical_list: D001843:Bone Cements
keywords: cementless; hemiarthroplasty; hip; incidence; periprosthetic fracture