title: Double-button Fixation System for Management of Acute Acromioclavicular Joint Dislocation.
abstract: BACKGROUND
  Surgical treatments for acromioclavicular (AC) joint dislocation present with some complications. The present study was designed to evaluate the double-button fixation system in the management of acute acromioclavicular joint dislocation.
  
  
  METHODS
  This cross sectional study, done between February 2011 to June 2014, consisted of 28 patients who underwent surgical management by the double-button fixation system for acute AC joint dislocation. Age, sex, injury mechanism, dominant hand, side with injury, length of follow up, time before surgery, shoulder and hand (DASH), constant and visual analogue scale (VAS) scores, and all complications of the cases during the follow up were recorded.
  
  
  RESULTS
  The mean age of patients was 33.23±6.7 years. Twenty four patients (85.71%) were male and four (14.28%) were female. The significant differences were observed between pre-operation VAS, constant shoulder scores and post-operation measurements. There were not any significant differences between right and left coracoclavicular, but two cases of heterotrophic ossifications were recorded. The mean follow-up time was 16.17±4.38 months.
  
  
  CONCLUSIONS
  According to the results, the double-button fixation system for management of acute acromioclavicular joint dislocation has suitable results and minimal damage to the soft tissues surrounding the coracoclavicular ligaments.
authors.affiliation: Firuzgar Hospital, Iran University of Medical Sciences, Tehran, Iran.
authors.forename: Ali
authors.initials: A
authors.lastname: Torkaman
authors.affiliation: Firuzgar Hospital, Iran University of Medical Sciences, Tehran, Iran.
authors.forename: Abolfazl
authors.initials: A
authors.lastname: Bagherifard
authors.affiliation: Firuzgar Hospital, Iran University of Medical Sciences, Tehran, Iran.
authors.forename: Tahmineh
authors.initials: T
authors.lastname: Mokhatri
authors.affiliation: Firuzgar Hospital, Iran University of Medical Sciences, Tehran, Iran.
authors.forename: Mohammad Hossein Shabanpour
authors.initials: MH
authors.lastname: Haghighi
authors.affiliation: Firuzgar Hospital, Iran University of Medical Sciences, Tehran, Iran.
authors.forename: Siamak
authors.initials: S
authors.lastname: Monshizadeh
authors.affiliation: Firuzgar Hospital, Iran University of Medical Sciences, Tehran, Iran.
authors.forename: Hamid
authors.initials: H
authors.lastname: Taraz
authors.affiliation: Firuzgar Hospital, Iran University of Medical Sciences, Tehran, Iran.
authors.forename: Amin
authors.initials: A
authors.lastname: Hasanvand
keywords: Acromioclavicular joint; Dislocation; Double-button fixation