title: High secondary displacement rate in the conservative treatment of impacted femoral neck fractures in 105 patients.
abstract: BACKGROUND
  The purpose of this retrospective study was to evaluate the dislocation rate after the conservative treatment of impacted femoral neck fractures in four hospitals with the same treatment protocol of partial weight-bearing when tolerated.
  
  
  METHODS
  We reviewed the records of 105 patients (mean age 78 years) with an impacted femoral neck fracture, all primarily treated conservatively. Patient demographics, ASA classification and radiographic features were scored.
  
  
  RESULTS
  Secondary displacement occurred in 48 patients (46%). There was no significant correlation (p > 0.05) between gender, age, ASA classification or Pauwels angle and secondary displacement.
  
  
  CONCLUSIONS
  In our group of patients, secondary displacement was frequent and unpredictable.
authors.affiliation: Isala Clinics, Department of Orthopaedic Surgery and Traumatology, Weezenlanden Hospital, Zwolle, The Netherlands. c.c.p.m.verheyen@isala.nl
authors.forename: Cees C P M
authors.initials: CC
authors.lastname: Verheyen
authors.forename: Tom C
authors.initials: TC
authors.lastname: Smulders
authors.forename: Ariaan D P
authors.initials: AD
authors.lastname: van Walsum
mesh_terms: D000293:Adolescent; D000328:Adult; D000367:Age Factors; D000368:Aged; D000369:Aged, 80 and over; D019644:Arthroplasty, Replacement, Hip; D005260:Female; D005265:Femoral Neck Fractures / Q000150:complications* / Q000000981:diagnostic imaging / Q000628:therapy*; D005593:Fracture Fixation, Internal; D017102:Fracture Healing; D006801:Humans; D004204:Joint Dislocations / Q000209:etiology* / Q000601:surgery; D008297:Male; D008875:Middle Aged; D011859:Radiography; D012189:Retrospective Studies; D016474:Weight-Bearing