In this exploratory study, gait analysis and quantitative MRI (QMRI) were used to assess biomechanical differences in patients that present with cyclops lesions at 12 months after ACL-reconstruction (ACLR). Thirty ACLR patients without and 10 ACLR patients with cyclops lesions underwent 3T MR T 1ρ mapping of the reconstructed knee joint prior to ACLR and at 12 months after ACLR, as well as a gait assessment during a fixed walking speed at 12 months after ACLR. Both external sagittal and frontal plane knee joint moments and joint moment impulses were calculated and assessed throughout the stance phase of gait. ACLR patients with cyclops lesions demonstrated a significantly greater (34% larger, p = 0.03) first peak knee flexion moment (KFM) and KFM impulse (42% larger, p = 0.05), compared to those without cyclops lesions, which may suggest an increased load during the loading response phase of gait. There were no differences (p > 0.05) in knee extension or adduction joint moments or moment impulses. ACLR patients with cyclops lesions demonstrated a significantly increased change in T 1ρ (ΔT 1ρ = 4.7 ms, p = 0.03), over 12 months, within the central medial tibia. The results of the study suggest that ACLR patients with cyclops lesions demonstrate altered sagittal plane loading patterns which may be related to an increased rate of medial tibiofemoral cartilage degeneration at 12 months after ACLR. The first peak external KFM may be an important target for intervention programs in ACLR patients with cyclops lesions in order to possibly slow the onset or progression of medial tibiofemoral cartilage degeneration.
|Number of pages||7|
|Journal||Journal of Orthopaedic Research|
|State||Published - Oct 2017|
Bibliographical noteFunding Information:
This study was supported by funding from the NIH/NIAMS P50-060752 and the American Orthopaedic Society for Sports Medicine (AOSSM). The contents of this study are sole responsibility of the authors and do not necessarily represent the official views of the NIH or the AOSSM.
© 2017 Orthopaedic Research Society. Published by Wiley Periodicals, Inc.
- cartilage degeneration
- cyclops lesions
ASJC Scopus subject areas
- Orthopedics and Sports Medicine