title: [Clinical research for reason analysis of posterior cruciate ligament reconstruction revision].
abstract: OBJECTIVE
  To study and analyze the clinical factors contributing to the failure of primary posterior cruciate ligament (PCL) reconstruction and to guide our clinical treatment.
  
  
  METHODS
  From November 2001 to May 2007, 8 patients underwent PCL reconstruction revision because of pathological instability after primary PCL reconstruction. And the clinical failure factors of the primary reconstruction were analyzed.
  
  
  RESULTS
  One case was reconstructed with bone-patellar tendon-bone (B-T-B) autografts, 7 cases with hamstring tendon autograft. The most probable causes of failure were improper graft placement in 7 cases (both femoral bone tunnels were behind the predicted one and tibial tunnels were in front of the predicted one). The reconstructed PCL in 4 cases ruptured absolutely and had been absorbed. Three cases had obviously loosen but still partly linked reconstructed ligament. These 8 cases all received primary PCL revision reconstruction. Among them, 6 cases were reconstructed with autograft (using a single-bundle quadruple hamstring graft in 3 cases, double-bundle quadruple hamstring graft in 1 case, single-bundle B-T-B autograft in 2 case), and 2 cases were reconstructed with allograft (using a single-bundle and a double-bundle B-T-B allograft reconstruction).
  
  
  CONCLUSIONS
  Incorrect bone tunnel placement is the major factor contributing to the surgical failure in many reasons for the failure of PCL reconstruction. So, it might be suggested that there is a great need for a more precise anatomical bone tunnel placement.
authors: Institute of Sports Medicine Third Hospital Peking University, Beijing 100083, China. yingfang.ao@vip.sina.com
authors: Ying-fang
authors: YF
authors: Ao
authors: Xu
authors: X
authors: Cheng
authors: Yue-lin
authors: YL
authors: Hu
authors: Guo-qing
authors: GQ
authors: Cui
authors: Jia-kuo
authors: JK
authors: Yu
mesh_terms: D000293:Adolescent; D000328:Adult; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D016119:Posterior Cruciate Ligament / Q000601:surgery*; D012086:Reoperation / Q000706:statistics & numerical data; D012189:Retrospective Studies; D017211:Treatment Failure; D055815:Young Adult