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Histopathology from the periodontium of rats subjected to periodontitis. 8.5% Doxycycline (DOX) gel was administered topically immediately after ligature placement and daily after periodontitis induction for 11 days. Photomicrograph of the region between the first and second molars of rats: A represents the region evaluated in all groups. Hematoxylin-Eosin (HE) staining
