title: A systematic review of double-bundle versus single-bundle posterior cruciate ligament reconstruction.
abstract: BACKGROUND
  Posterior Cruciate Ligament (PCL) ruptures are common sports injuries. One of the key controversies in PCL reconstruction is whether double-bundle reconstruction provides biomechanical and clinical outcomes superior to single-bundle reconstruction.
  
  
  METHODS
  We performed a comprehensive search in multiple databases to evaluate the advantages of single-bundle or double bundle reconstructions in anteroposterior stability, graft tension, rotational stability, and functional outcome.
  
  
  RESULTS
  Biomechanical comparisons evaluating anteroposterior stability described either no difference or increased stability in double-bundle reconstructions. Comparing these results is complicated by different graft choices, tensioning techniques, and tunnel positions. Biomechanical studies of graft tension demonstrated conflicting results regarding the optimal reconstruction technique. Seven retrospective clinical studies of single- and double-bundle reconstructions with methodological limitations reported no difference in clinical outcome.
  
  
  CONCLUSIONS
  The superiority of single-bundle or double-bundle posterior cruciate ligament reconstruction remains uncertain.
authors.affiliation: Institute of Sports Medicine, Peking University Third Hospital, No. 49, North Garden Road, Haidian District, Beijing, China.
authors.forename: Yan-Song
authors.initials: YS
authors.lastname: Qi
authors.affiliation: Institute of Sports Medicine, Peking University Third Hospital, No. 49, North Garden Road, Haidian District, Beijing, China.
authors.forename: Hai-Jun
authors.initials: HJ
authors.lastname: Wang
authors.affiliation: Institute of Sports Medicine, Peking University Third Hospital, No. 49, North Garden Road, Haidian District, Beijing, China.
authors.forename: Shao-Jie
authors.initials: SJ
authors.lastname: Wang
authors.affiliation: Institute of Sports Medicine, Peking University Third Hospital, No. 49, North Garden Road, Haidian District, Beijing, China.
authors.forename: Zheng-Zheng
authors.initials: ZZ
authors.lastname: Zhang
authors.affiliation: Institute of Sports Medicine, Peking University Third Hospital, No. 49, North Garden Road, Haidian District, Beijing, China.
authors.forename: Ai-Bing
authors.initials: AB
authors.lastname: Huang
authors.affiliation: Institute of Sports Medicine, Peking University Third Hospital, No. 49, North Garden Road, Haidian District, Beijing, China. yujiakuo@126.com.
authors.forename: Jia-Kuo
authors.initials: JK
authors.lastname: Yu
mesh_terms: D006801:Humans; D016119:Posterior Cruciate Ligament / Q000293:injuries* / Q000601:surgery*; D016032:Randomized Controlled Trials as Topic / Q000379:methods; D019651:Plastic Surgery Procedures / Q000379:methods*
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