Hirofumi Ohnishi

Papers

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About

Hirofumi Ohnishi is a leading orthopedic researcher whose work centers on knee biomechanics, with a particular focus on anterior cruciate ligament (ACL) reconstruction and the stabilizing roles of the menisci. His major contributions include elucidating how the medial meniscus contributes to anterior knee stability, a finding that challenges traditional understandings of force distribution across the anterolateral, posterolateral, and medial structures. In a highly cited 2022 study (17 citations), Ohnishi used robotic simulators to demonstrate the medial meniscus's critical load-bearing function under anterior tibial loads, providing new insights for surgical planning. He has also advanced pediatric ACL reconstruction by comparing over-the-top (OTT) techniques, showing that proximally shifting the femoral graft fixation site can reduce anterior laxity at deep flexion angles—a key concern for skeletally immature patients. His 2022 biomechanical comparison (7 citations) offers practical guidance for improving outcomes in this vulnerable population. With a citation count already growing, Ohnishi’s work bridges cadaveric biomechanics and clinical application, making him a rising authority in sports medicine and knee surgery.