TY - JOUR
T1 - Intraarticular lengths of double-bundle grafts can change during knee flexion
T2 - Intraoperative measurements in anatomic anterior cruciate ligament reconstructions
AU - Furumatsu, Takayuki
AU - Hiranaka, Takaaki
AU - Kodama, Yuya
AU - Kamatsuki, Yusuke
AU - Okazaki, Yuki
AU - Yamawaki, Tadashi
AU - Endo, Hirosuke
AU - Ozaki, Toshifumi
N1 - Funding Information:
This study was partly supported by grants from the Stryker Academic Contribution Program (TF) and the Smith & Nephew (TF).
Publisher Copyright:
© 2021 Elsevier Masson SAS
PY - 2021/4
Y1 - 2021/4
N2 - Background: The lengths of the anteromedial bundle (AMB) and posterolateral bundle (PLB) change during knee motion in double-bundle anterior cruciate ligament (ACL) reconstruction. However, the actual intraarticular graft length would be affected by the bone tunnel position and tunnel creation angle during ACL reconstruction. The aim of this study was to investigate the intraarticular length change of the AMB and PLB in patients who underwent anatomic double-bundle ACL reconstruction. Hypothesis: We hypothesized that the PLB would show a more dynamic length change pattern than the AMB during knee flexion at ACL reconstruction. Methods: Thirty-two patients (16 men and 16 women) who had isolated ACL injuries with intact menisci were investigated. Anatomic double-bundle ACL reconstructions were performed using semitendinosus tendon autografts at a mean age of 30.6 years. The graft and tunnel lengths were measured intraoperatively. Intraarticular graft lengths and length changes were calculated at 0° and 90° of knee flexion during ACL reconstruction. Intraoperative data were collected prospectively, and analyses were performed retrospectively. Results: The intraarticular length of the AMB at 0° of knee flexion was 28.1 ± 5.5 mm. At 90° of knee flexion, the AMB intraarticular length decreased to 25.6 ± 4.8 mm. The intraarticular length of the PLB decreased to 17.7 ± 4.6 mm at 90° of knee flexion compared to 22.0 ± 4.2 mm at 0° of knee flexion. Changes in the intraarticular graft length during knee flexion were detected more in the PLB (4.1 mm) than in the AMB (2.0 mm, p = 0.01). Discussion: This study demonstrated that the intraarticular length change of the PLB during knee motion was larger than that of the AMB in anatomic double-bundle ACL reconstructions with semitendinosus tendon autografts and suspensory femoral fixation devices. Level of evidence: IV; retrospective cohort study.
AB - Background: The lengths of the anteromedial bundle (AMB) and posterolateral bundle (PLB) change during knee motion in double-bundle anterior cruciate ligament (ACL) reconstruction. However, the actual intraarticular graft length would be affected by the bone tunnel position and tunnel creation angle during ACL reconstruction. The aim of this study was to investigate the intraarticular length change of the AMB and PLB in patients who underwent anatomic double-bundle ACL reconstruction. Hypothesis: We hypothesized that the PLB would show a more dynamic length change pattern than the AMB during knee flexion at ACL reconstruction. Methods: Thirty-two patients (16 men and 16 women) who had isolated ACL injuries with intact menisci were investigated. Anatomic double-bundle ACL reconstructions were performed using semitendinosus tendon autografts at a mean age of 30.6 years. The graft and tunnel lengths were measured intraoperatively. Intraarticular graft lengths and length changes were calculated at 0° and 90° of knee flexion during ACL reconstruction. Intraoperative data were collected prospectively, and analyses were performed retrospectively. Results: The intraarticular length of the AMB at 0° of knee flexion was 28.1 ± 5.5 mm. At 90° of knee flexion, the AMB intraarticular length decreased to 25.6 ± 4.8 mm. The intraarticular length of the PLB decreased to 17.7 ± 4.6 mm at 90° of knee flexion compared to 22.0 ± 4.2 mm at 0° of knee flexion. Changes in the intraarticular graft length during knee flexion were detected more in the PLB (4.1 mm) than in the AMB (2.0 mm, p = 0.01). Discussion: This study demonstrated that the intraarticular length change of the PLB during knee motion was larger than that of the AMB in anatomic double-bundle ACL reconstructions with semitendinosus tendon autografts and suspensory femoral fixation devices. Level of evidence: IV; retrospective cohort study.
KW - Anatomic double-bundle reconstruction
KW - Anterior cruciate ligament
KW - Intraarticular length
KW - Semitendinosus autograft
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U2 - 10.1016/j.otsr.2021.102816
DO - 10.1016/j.otsr.2021.102816
M3 - Article
C2 - 33484904
AN - SCOPUS:85101304597
SN - 1877-0568
VL - 107
JO - Orthopaedics and Traumatology: Surgery and Research
JF - Orthopaedics and Traumatology: Surgery and Research
IS - 2
M1 - 102816
ER -