title: Current techniques in anatomic anterior cruciate ligament reconstruction.
abstract: OBJECTIVE
  The aim of this report is to summarize several techniques that are currently performed to reconstruct the anterior cruciate ligament (ACL) via an anatomic approach restoring the anteromedial (AM) bundle and posterolateral (PL) bundle separately.
  
  
  METHODS
  A survey containing questions about technique and rehabilitation protocol and a picture of an anatomic specimen, where study participants were asked to locate the tunnels, was created. This was sent to surgeons identified either through an Internet-based search via the National Library of Medicine or who have presented clinical studies about anatomic ACL reconstruction at international meetings. The questions were presented in an open-fashioned way in an Excel-based data file (Microsoft, Redmond, WA) and addressed the profile of the panelists, number of total and anatomic ACL reconstruction per year, graft choice, graft fixation, advantages and disadvantages of anatomic ACL reconstruction, and rehabilitation protocol.
  
  
  RESULTS
  One of the most common techniques used 2 femoral and 2 tibial tunnels with a soft-tissue graft. All but 1 panelist used a hamstring graft. A great variance in tunnel placement of the PL bundle was noted. Most surgeons prefer a transtibial technique for the AM bundle. Of the study participants, 67% start by placing a tunnel at the tibial insertion of the ACL. All of the surgeons who started at the femoral insertion with the PL bundle used an accessory medial portal technique.
  
  
  CONCLUSIONS
  Anatomic reconstruction of the ACL remains a technically demanding procedure. Hamstring grafts are the most commonly used graft; an extracortical flip button technique is used at the femoral site, and a hybrid technique is used at the tibial site. The femoral tunnel placement of the PL bundle tunnel is statistically different from the AM bundle tunnel, and the same rehabilitation protocols as for single-bundle ACL reconstructions are used.
  
  
  CONCLUSIONS
  Knowledge of the pitfalls and current techniques used for an anatomic approach restoring both bundles of the ACL may provide important information for surgeons considering this technique.
  
  
  METHODS
  Level V, expert opinion.
authors.affiliation: Department of Orthopaedic Surgery, University of Pittsburgh Medical Center, Pittsburgh, Pennsylvania, USA. thore.zantop@ukmuenster.de
authors.forename: Thore
authors.initials: T
authors.lastname: Zantop
authors.forename: Seiji
authors.initials: S
authors.lastname: Kubo
authors.forename: Wolf
authors.initials: W
authors.lastname: Petersen
authors.forename: Volker
authors.initials: V
authors.lastname: Musahl
authors.forename: Freddie H
authors.initials: FH
authors.lastname: Fu
mesh_terms: D016118:Anterior Cruciate Ligament / Q000601:surgery*; D001182:Arthroscopy / Q000379:methods*; D006801:Humans; D007718:Knee Injuries / Q000534:rehabilitation / Q000601:surgery*; D018482:Muscle, Skeletal / Q000637:transplantation; D019637:Orthopedic Procedures / Q000379:methods