title: Heterotopic ossification after cemented or uncemented bateman bipolar hemiarthroplasty.
abstract: BACKGROUND
  This is a retrospective study to evaluate the incidence of heterotopic ossification (HO) in cemented and uncemented femoral neck fractures treated with Bateman bipolar hemiarthroplasty.
  
  
  METHODS
  From October 1985 to July 1990, there were 451 cases of displaced intracapsular fractures of the femoral neck treated with Bateman bipolar hemiarthroplasty (261 uncemented vs 190 cemented) at the Veterans General Hospital-Taipei.
  
  
  RESULTS
  After an average follow-up of 46 months, there was more HO in the cemented group than in the uncemented group (p = 0.014, chi-squared test). The average surgical time was approximately 20 minutes longer and the average blood loss was approximately 160 ml more in the cemented Bateman bipolar hemiarthroplasty group.
  
  
  CONCLUSIONS
  HO formation is more common in cemented Bateman bipolar hemiarthroplasty than in the uncemented procedure. The incidence of HO is not related to age or sex.
authors.affiliation: Department of Orthopedics and Traumatology, Veterans General Hospital-Taipei, Taiwan, ROC.
authors.forename: T H
authors.initials: TH
authors.lastname: Chen
authors.forename: C K
authors.initials: CK
authors.lastname: Huang
authors.forename: W M
authors.initials: WM
authors.lastname: Chen
authors.forename: C C
authors.initials: CC
authors.lastname: Chiang
authors.forename: W H
authors.initials: WH
authors.lastname: Lo
mesh_terms: D019644:Arthroplasty, Replacement, Hip / Q000009:adverse effects* / Q000379:methods; D001843:Bone Cements; D005260:Female; D005265:Femoral Neck Fractures / Q000601:surgery*; D006801:Humans; D008297:Male; D009999:Ossification, Heterotopic / Q000209:etiology*; D012189:Retrospective Studies
chemical_list: D001843:Bone Cements