Sungkyunkwan University · Medicine
Professor Dae-Hee Lee's research lab specializes in orthopedic biomechanics and knee joint health, with a primary focus on meniscal injuries, osteoarthritis progression, and the functional implications of meniscal extrusion. The lab investigates the structural and biomechanical factors influencing meniscal repair outcomes, particularly in the context of radial tear components and osteoarthritis severity. Clinical and radiological outcomes following arthroscopic procedures such as meniscal allograft transplantation (MAT) are also a key research direction, with emphasis on long-term joint space width and patient-reported outcomes. Additionally, the lab explores sensorimotor deficits in ACL-injured knees, particularly proprioceptive impairments affecting joint position and movement sense.
Figures are computed from collected data and may differ slightly.
meniscal extrusion was greater and more severe in knees with a radial tear component than in knees without a radial component. The incidence and degree of major extrusion was similar in knees with root tears and non-root tears. A radial component and knee osteoarthritis severity were similarly predictive of absolute and relative extrusion. Meniscal extrusion in osteoarthritic knees was associated not only with degenerative meniscal tear but also with osteoarthritis severity. Therefore, arthrosco
II.
Level IV, therapeutic case series.
Joint space width was slightly narrower after MAT. Extrusion had no effect on 5-year clinical or radiological outcomes.
Level IV, therapeutic case series.
Proprioception of ACL-injured knees was decreased compared with contralateral intact knees, as determined by both joint movement (kinesthesia) and joint position. The magnitude of loss of proprioception was greater in joint position than in joint movement.
Better outcomes were seen after meniscal repair compared with partial meniscectomy for MMRTs, with greater improvements in Lysholm scores, and lower rates of progression to knee osteoarthritis, and lower reoperation rate.
Level III, cross-sectional study.
The risk of graft extrusion increases as the axial plane trough angle increases. The angle can be reduced by ensuring that the bony trough starting point is not created in too lateral a position.
II.
Theoretical compensation after anterior cruciate ligament (ACL) tear could cause quadriceps weakness and hamstring activation, preventing anterior tibial subluxation and affecting the expected hamstring-to-quadriceps ratio. Although quadriceps weakness often occurs after ACL tears, it remains unclear whether hamstring strength and hamstring-to-quadriceps ratio increase in ACL deficient knees. This meta-analysis compared the isokinetic muscle strength of quadriceps and hamstring muscles, and the
The transtibial technique of anatomic reconstruction resulted in more highly positioned femoral tunnels in the low-to-high direction than did the anteromedial portal and outside-in techniques. However, no significant differences in the femoral tunnel location were observed in the deep-to-shallow direction.
Level IV, therapeutic case series.
This study was designed to compare proprioception and postural stability in patients with acute (time from injury ≤ 3 months) and chronic (time from injury > 3 months) ACL tears, and to evaluate the correlation between time interval after ACL injury and proprioception. Thigh muscle strength, postural stability, and joint position sense were compared in 48 patients with acute ACL tears and in 28 with chronic ACL tears. Maximal torque (60°/sec) of the quadriceps and hamstring was evaluated using a
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