title: Single-Bundle Versus Double-Bundle Anterior Cruciate Ligament Reconstruction: A Comparative 2-Year Follow-up.
abstract: OBJECTIVE
  To compare anatomic single-bundle (SB) versus double-bundle (DB) anterior cruciate ligament (ACL) reconstruction and to determine possible differences in clinical outcomes.
  
  
  METHODS
  In this prospective randomized study, 64 patients were divided into 2 equal groups. Anatomic SB and DB ACL reconstructions were performed using hamstring tendons. A follow-up examination 2 years after surgery comprised International Knee Documentation Committee (IKDC) 2000 assessment, Laxitester (ORTEMA Sport Protection, Markgröningen, Germany) measurement of anteroposterior translation regarding rotational stability, and radiographic evaluation. Statistical analysis and power calculation were performed (P < .05).
  
  
  RESULTS
  We examined 62 patients at a mean of 26 months (range, 23.3 to 32.7 months) after surgery. IKDC subjective and objective scores showed no significant differences when both groups were compared. The Laxitester measurements showed no significant differences regarding anteroposterior translation in the neutral position, internal rotation, and external rotation. However, there was a significant improvement in rotational laxity in external rotation in the DB group (P = .02). No differences were seen between the groups regarding osteoarthritic changes and tunnel widening.
  
  
  CONCLUSIONS
  There were no differences in IKDC subjective and objective scores between patients who underwent anatomic SB ACL reconstruction and those who underwent anatomic DB ACL reconstruction.
  
  
  METHODS
  Level I, prospective, randomized controlled clinical trial.
authors: Department of Orthopedic and Trauma Surgery, Albert Ludwig University of Freiburg, Freiburg, Germany. Electronic address: hermann.mayr@uniklinik-freiburg.de.
authors: Hermann O
authors: HO
authors: Mayr
authors: Albert Ludwig University of Freiburg, Freiburg, Germany.
authors: Paul
authors: P
authors: Benecke
authors: Ludwig Maximilian University of Munich, Munich, Germany.
authors: Anna
authors: A
authors: Hoell
authors: Ludwig Maximilian University of Munich, Munich, Germany.
authors: Marcus
authors: M
authors: Schmitt-Sody
authors: Department of Orthopedic and Trauma Surgery, Albert Ludwig University of Freiburg, Freiburg, Germany.
authors: Anke
authors: A
authors: Bernstein
authors: Department of Orthopedic and Trauma Surgery, Albert Ludwig University of Freiburg, Freiburg, Germany.
authors: Norbert P
authors: NP
authors: Suedkamp
authors: OCM-Clinic Munich, Munich, Germany.
authors: Amelie
authors: A
authors: Stoehr
mesh_terms: D000328:Adult; D059549:Anterior Cruciate Ligament Reconstruction / Q000379:methods*; D001182:Arthroscopy; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D007593:Joint Instability / Q000601:surgery; D007719:Knee Joint / Q000601:surgery; D008297:Male; D063868:Patient Outcome Assessment; D011446:Prospective Studies; D012399:Rotation; D013710:Tendons / Q000637:transplantation*