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- W4308255890 abstract "Purpose Osteoarthritis that develops after anterior cruciate ligament (ACL) reconstruction is a critical issue. We examined the effects of the amount of weight bearing early after ACL reconstruction on articular cartilage.Materials and Methods Rats were divided into groups according to the treatment received: untreated control, ACL reconstruction (ACLR), ACL reconstruction plus hindlimb unloading (ACLR + HU), and ACL reconstruction plus morphine administration (ACLR + M). ACL reconstruction was performed on the right knee throughout the groups. To assess the amount of weight bearing, one-hindlimb standing time ratio (STR; operated side/contralateral side) during treadmill locomotion was evaluated during the experimental period. At day 7 or 14 post-surgery, cartilage degeneration of the medial tibial plateau was histologically assessed.Results In the ACLR group, reduction in weight bearing characterized by significantly reduced STR was observed between day 1 and 7. Reduction in weight bearing was partially attenuated by morphine administration. Compared with the control group, the ACLR group exhibited an increased Mankin score that was accompanied by increased cyclooxygenase-2 expression in the anterior region. In the ACLR + HU group, Mankin scores were significantly higher in the middle and posterior regions, and cartilage thickness in these regions was significantly thinner than those in the ACLR group. In the ACLR + M group, although chondrocyte density in the anterior region was increased, all other parameters were not significantly different from those in the ACLR group.Conclusions Our results suggest that early weight bearing after ACL reconstruction is important to reduce cartilage degeneration." @default.
- W4308255890 created "2022-11-09" @default.
- W4308255890 creator A5019713895 @default.
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- W4308255890 date "2022-11-05" @default.
- W4308255890 modified "2023-09-30" @default.
- W4308255890 title "The effects of the amount of weight bearing on articular cartilage early after ACL reconstruction in rats" @default.
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- W4308255890 doi "https://doi.org/10.1080/03008207.2022.2141627" @default.
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