title: The Results of Single Bundle Versus Double Bundle ACL Reconstruction Surgery, a Retrospective Study and Review of Literature.
abstract: OBJECTIVE
  The purpose of this study was to evaluate the results of single bundle and double bundle surgical techniques for anterior cruciate ligament (ACL) reconstruction.
  
  
  METHODS
  In this study, all single bundle and double bundle ACL reconstruction surgeries that were done in our university hospital from January 2008 to December 2012 were enrolled. All patients were followed at 2,6,12, 24 weeks and 1 a 2 years post operatively. On last follow up all patients were evaluated by clinical examination, KT-1000 and Lysholm questionnaire.
  
  
  RESULTS
  Seventy five patients were operated using single bundle and eighty five patients with double bundle technique. Fifty seven percent of patients in single bundle and 80% of patients in double bundle group had experienced pain during follow-up period. None of cases had knee extension or flexion loss. The average side to side differences using KT-1000 was 3.5 ± 0.38 (2.9-4.1) millimeters in single bundle group and 3.39 ± 0.39 (2.8-4) millimeters in double bundle group. These results showed no significant difference between two groups (P= 0.31). Lysholm score improved significantly in both groups, but there was no significant difference between them.
  
  
  CONCLUSIONS
  According to this study the clinical results of single bundle ACL reconstruction was similar to double bundle reconstruction in short term follow up. Further studies are needed to evaluate the long term results.
authors.affiliation: Department of Knee Surgery, Firoozgar Hospital, Iran University of Medical Science, Tehran, Iran.
authors.forename: Ali
authors.initials: A
authors.lastname: Torkaman
authors.affiliation: Department of Knee Surgery, Firoozgar Hospital, Iran University of Medical Science, Tehran, Iran.
authors.forename: Hamidreza
authors.initials: H
authors.lastname: Yazdi
authors.affiliation: BIMDC Hospital, Harvard Medical School, Cambridge, USA.
authors.forename: Mohammad Ghorban
authors.initials: MG
authors.lastname: Hosseini
mesh_terms: D000070598:Anterior Cruciate Ligament Injuries / Q000601:surgery*; D059549:Anterior Cruciate Ligament Reconstruction / Q000379:methods*; D006801:Humans; D012189:Retrospective Studies; D016896:Treatment Outcome
keywords: ACL reconstruction; Double bundle; Lysholm; Patient; Single bundle