title: Does press-fit technique reduce tunnel volume enlargement after anterior cruciate ligament reconstruction with autologous hamstring tendons? A prospective randomized computed tomography study.
abstract: OBJECTIVE
  The purpose of this prospective, randomized, computed tomography-based study was to investigate whether the press-fit technique reduces tunnel volume enlargement (TVE) and improves the clinical outcome after anterior cruciate ligament reconstruction at a minimum follow-up of 1 year compared with conventional technique.
  
  
  METHODS
  Sixty-nine patients undergoing primary ACL reconstruction using hamstring autografts were randomly allocated to either the press-fit technique group (group A) or conventional technique group (group B). All patients were evaluated for TVE and tunnel widening using computed tomography scanning, for functional outcome using International Knee Documentation Committee and Lysholm scores, for rotational stability using the pivot-shift test, and for anterior laxity using the KT-2000 arthrometer at a minimum of 1-year follow-up.
  
  
  RESULTS
  There were no significant differences in TVE between the 2 groups. In group A, in which the press-fit technique was used, mean volume enlargement in the femoral tunnel was 65% compared with 71.5% in group B (P = .84). In group A, 57% (20 of 35) of patients developed femoral TVE compared with 67% (23 of 34) of patients in group B (P = .27). Both groups showed no significant difference for functional outcome (mean Lysholm score P = .73, International Knee Documentation Committee score P = .15), or knee laxity (anterior P = .78, rotational P = .22) at a minimum follow-up of 1 year.
  
  
  CONCLUSIONS
  In a comparison of press-fit and conventional techniques, there were no significant differences in TVE and clinical outcome at short-term follow-up.
  
  
  METHODS
  Level II, therapeutic study, prospective randomized clinical trial.
authors.affiliation: Department of Orthopaedic Surgery, Inje University, Ilsanpaik Hospital, Ilsan, Korea.
authors.forename: Dae-Hee
authors.initials: DH
authors.lastname: Hwang
authors.forename: Gautam M
authors.initials: GM
authors.lastname: Shetty
authors.forename: Jong In
authors.initials: JI
authors.lastname: Kim
authors.forename: Jae Ho
authors.initials: JH
authors.lastname: Kwon
authors.forename: Jae-Kwang
authors.initials: JK
authors.lastname: Song
authors.forename: Michael
authors.initials: M
authors.lastname: Muñoz
authors.forename: Jun Seop
authors.initials: JS
authors.lastname: Lee
authors.forename: Kyung-Wook
authors.initials: KW
authors.lastname: Nha
mesh_terms: D000293:Adolescent; D000328:Adult; D059549:Anterior Cruciate Ligament Reconstruction / Q000379:methods* / Q000534:rehabilitation; D001182:Arthroscopy / Q000379:methods*; D005260:Female; D005269:Femur / Q000000981:diagnostic imaging / Q000473:pathology / Q000601:surgery*; D005500:Follow-Up Studies; D006801:Humans; D007593:Joint Instability / Q000175:diagnosis; D007719:Knee Joint / Q000503:physiopathology; D008297:Male; D008592:Menisci, Tibial / Q000601:surgery; D011183:Postoperative Complications / Q000175:diagnosis; D020127:Recovery of Function; D012720:Severity of Illness Index; D016037:Single-Blind Method; D013710:Tendons / Q000637:transplantation; D000070600:Tibial Meniscus Injuries; D014057:Tomography, X-Ray Computed; D014182:Transplantation, Autologous; D055815:Young Adult