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Photomicrographs of the epidural adhesion issues in the laminectomy sites in the control and experimental groups. There was dense scar tissue adhered to dura mater in the control group. Loose scar tissues without adherence to dura mater were present in the experimental group. MMC-PLA, mitomycin C-polylactic acid; MMC-PEG, mitomycin C-polyethylene glycol.
