title: Comparison of clinical outcomes and second-look arthroscopic findings after ACL reconstruction using a hamstring autograft or a tibialis allograft.
abstract: OBJECTIVE
  The purpose of this prospective randomized clinical study was to compare the clinical and radiological outcomes, including tibial tunnel widening and the progression of osteoarthritis after ACL reconstruction using a hamstring autograft or a tibialis allograft. In addition, we compared the graft tear and synovial coverage of grafts in patients that underwent the second-look arthroscopy.
  
  
  METHODS
  Among 184 patients with an ACL injury who underwent ACL reconstruction, 68 patients of autograft group and 64 patients of tibialis allograft group were included for this study after minimum of 2-year follow-up. The Lachman and pivot-shift tests, Tegner activity score, Lysholm knee score, and IKDC score were compared between the two groups. The quadriceps and hamstring isokinetic strengths using dynamometer were also compared. Degree of OA was determined using the Kellgren-Lawrence grading system on the weight-bearing radiographs. In total, 51 patients (26 patients in autograft group and 25 in the tibialis allograft group) underwent the second-look arthroscopy, in which we compared the apparent tear of graft and synovial coverage of grafts.
  
  
  RESULTS
  At the final follow-up, there were no statistical significances in the two groups in Lachman and pivot-shift tests (n.s.). The Tegner activity, Lysholm knee score, and IKDC scores were similar in the two groups. Moreover, no significant differences were observed in the muscle power (n.s.). Some patients showed the progression of OA (five in autograft and four in allograft groups) without intergroup difference (n.s.). Regarding the findings of second-look arthroscopy, although there was no significant difference in graft tear, synovial coverage was better in autograft group than in allograft group.
  
  
  CONCLUSIONS
  Even though hamstring autografts and tibialis allografts provided good functional outcomes without significant differences, the second-look arthroscopy revealed that hamstring autografts produced better synovial coverage than tibialis allograft.
  
  
  METHODS
  I.
authors.affiliation: Department of Orthopedic Surgery, Center for Joint Disease, Chonnam National University Hwasun Hospital, 160 Ilsimri, Hwasun-eup, Hwasun-gun, Jeollanamdo, 519-809, South Korea.
authors.forename: Seung-Hyun
authors.initials: SH
authors.lastname: Yoo
authors.affiliation: Department of Orthopedic Surgery, Center for Joint Disease, Chonnam National University Hwasun Hospital, 160 Ilsimri, Hwasun-eup, Hwasun-gun, Jeollanamdo, 519-809, South Korea.
authors.forename: Eun-Kyoo
authors.initials: EK
authors.lastname: Song
authors.affiliation: Department of Orthopedic Surgery, Center for Joint Disease, Chonnam National University Hwasun Hospital, 160 Ilsimri, Hwasun-eup, Hwasun-gun, Jeollanamdo, 519-809, South Korea.
authors.forename: Young-Rok
authors.initials: YR
authors.lastname: Shin
authors.affiliation: Department of Orthopedic Surgery, Center for Joint Disease, Chonnam National University Hwasun Hospital, 160 Ilsimri, Hwasun-eup, Hwasun-gun, Jeollanamdo, 519-809, South Korea.
authors.forename: Sung-Kyu
authors.initials: SK
authors.lastname: Kim
authors.affiliation: Department of Orthopedic Surgery, Center for Joint Disease, Chonnam National University Hwasun Hospital, 160 Ilsimri, Hwasun-eup, Hwasun-gun, Jeollanamdo, 519-809, South Korea. seonbell@jnu.ac.kr.
authors.forename: Jong-Keun
authors.initials: JK
authors.lastname: Seon
mesh_terms: D000328:Adult; D000070598:Anterior Cruciate Ligament Injuries / Q000000981:diagnostic imaging* / Q000601:surgery*; D059549:Anterior Cruciate Ligament Reconstruction / Q000379:methods*; D001182:Arthroscopy; D018450:Disease Progression; D005260:Female; D000070633:Hamstring Muscles; D006801:Humans; D065466:Lysholm Knee Score; D008297:Male; D008875:Middle Aged; D020370:Osteoarthritis, Knee / Q000000981:diagnostic imaging / Q000503:physiopathology; D011446:Prospective Studies; D011859:Radiography; D024162:Second-Look Surgery; D013710:Tendons / Q000637:transplantation*; D014182:Transplantation, Autologous; D014184:Transplantation, Homologous; D016896:Treatment Outcome
keywords: Anterior cruciate ligament; Arthroscopy; Hamstring autograft; Reconstruction; Second-look; Tibialis allograft