title: Single-bundle or double-bundle for anterior cruciate ligament reconstruction: a meta-analysis.
abstract: OBJECTIVE
  To compare the clinical outcomes of anterior cruciate ligament (ACL) reconstruction with double-bundle and single-bundle techniques.
  
  
  METHODS
  Meta-analysis
  
  
  METHODS
  We searched electronic databases including PubMed, Embase, Cochrane Central Register of Controlled Trials, and Google Scholar from 1966 to Jan 2012 to identify randomized controlled trials (RCTs) comparing clinical outcomes of anterior cruciate ligament (ACL) reconstruction with double-bundle and single-bundle techniques. Two reviewers independently extracted data and assessed trial quality. Meta-analysis was performed to pool results.
  
  
  RESULTS
  Nineteen RCTs were included with a total of 1686 patients. The pooled analysis across all studies showed that the double-bundle ACL reconstruction technique could have significantly better outcomes in rotational laxity, as assessed by the pivot-shift test, KT grading and IKDC grading than the single-bundle techniques. We found no evidence of a difference in function measured by IKDC scores, KT arthrometer, Lysholm knee, or Tegner activity scores and complications after operations between single and double-bundle ACL reconstruction groups.
  
  
  CONCLUSIONS
  Our meta-analysis demonstrated the superiority of double-bundle over single-bundle anterior cruciate ligament reconstruction. The double-bundle ACL reconstruction technique has better outcomes in rotational laxity (pivot-shift test, KT grading and IKDC grading). However, for functional recovery, there was no significant difference between single-bundle and double-bundle reconstruction techniques.
authors.affiliation: Department of Orthopaedics, Tianjin Medical University General Hospital, 154 Anshan Road, Heping District, Tianjin 300052, PR China.
authors.forename: Yu-Lin
authors.initials: YL
authors.lastname: Li
authors.affiliation: Department of Orthopaedics, Tianjin Medical University General Hospital, 154 Anshan Road, Heping District, Tianjin 300052, PR China.
authors.forename: Guang-Zhi
authors.initials: GZ
authors.lastname: Ning
authors.affiliation: Department of Orthopaedics, Tianjin Medical University General Hospital, 154 Anshan Road, Heping District, Tianjin 300052, PR China.
authors.forename: Qiang
authors.initials: Q
authors.lastname: Wu
authors.affiliation: Department of Orthopaedics, Tianjin Medical University General Hospital, 154 Anshan Road, Heping District, Tianjin 300052, PR China.
authors.forename: Qiu-Li
authors.initials: QL
authors.lastname: Wu
authors.affiliation: Department of Orthopaedics, Tianjin Medical University General Hospital, 154 Anshan Road, Heping District, Tianjin 300052, PR China.
authors.forename: Yan
authors.initials: Y
authors.lastname: Li
authors.affiliation: Department of Orthopaedics, Tianjin Medical University General Hospital, 154 Anshan Road, Heping District, Tianjin 300052, PR China.
authors.forename: Yan
authors.initials: Y
authors.lastname: Hao
authors.affiliation: Department of Orthopaedics, Tianjin Medical University General Hospital, 154 Anshan Road, Heping District, Tianjin 300052, PR China. Electronic address: fengsq321@gmail.com.
authors.forename: Shi-Qing
authors.initials: SQ
authors.lastname: Feng
mesh_terms: D059549:Anterior Cruciate Ligament Reconstruction / Q000379:methods*; D053587:Arthrometry, Articular; D006801:Humans; D007593:Joint Instability / Q000601:surgery; D007719:Knee Joint / Q000601:surgery*; D063868:Patient Outcome Assessment; D016032:Randomized Controlled Trials as Topic; D020127:Recovery of Function; D012399:Rotation
keywords: Anterior cruciate ligament (ACL); Double-bundle; Meta-analysis; Outcome measures; Single-bundle