title: [Imaging reasons for periprosthetic femoral fractures during the operation of total hip arthroplasty with anatomic prosthesis].
abstract: OBJECTIVE
  To explore the imaging reasons for periprosthetic femoral fractures during the operation of total hip arthroplasty with anatomic prosthesis.
  
  
  METHODS
  The fracture group consisted of 7 cases with periprosthetic femoral fracture (PPFF) and the non-fracture group 21 cases without PPFF during the operation of total hip arthroplasty (THA) among the 144 cases of primary THA with anatomic prosthesis. The preoperative plain films of hip joint were taken to calibrate the Sharp's angle, centre edge (CE) angle, femoral neck shaft angle, femoral anteversion angle of neck, bowing angle of proximal femoral shaft part, width of narrowest part in proximal femoral shaft. For each case, surgical details, age, height and weight were recorded. The results were analyzed with independent sample t test by software SPSS 17.0.
  
  
  RESULTS
  No significant difference existed in general situation, Sharp's angle and CE's angle between two groups. And there were significant differences in femoral neck shaft angle (P = 0.040), femoral anteversion angle of neck (P = 0.026), bowing angle of proximal femoral shaft part (P = 0.024), width of narrowest part in proximal femoral shaft (P = 0.021).
  
  
  CONCLUSIONS
  Dysplasia of proximal femur is a major cause of periprosthetic femoral fracture during the operation of total hip arthroplasty with anatomic prosthesis.
authors.affiliation: Department of Orthopedics Surgery, Peking University First Hospital, Beijing, China.
authors.forename: Dao-jian
authors.initials: DJ
authors.lastname: Zhang
authors.forename: Tian-yue
authors.initials: TY
authors.lastname: Zhu
authors.forename: Wei-bing
authors.initials: WB
authors.lastname: Chai
authors.forename: Hong-zhang
authors.initials: HZ
authors.lastname: Lu
authors.forename: Jun
authors.initials: J
authors.lastname: Li
authors.forename: Zhen-ning
authors.initials: ZN
authors.lastname: Liu
authors.forename: Yi-lin
authors.initials: YL
authors.lastname: Ye
mesh_terms: D000328:Adult; D000368:Aged; D019644:Arthroplasty, Replacement, Hip / Q000379:methods; D005260:Female; D005264:Femoral Fractures / Q000000981:diagnostic imaging*; D006801:Humans; D008297:Male; D008875:Middle Aged; D057068:Periprosthetic Fractures; D011859:Radiography; D012189:Retrospective Studies