Photomicrograph of Group A (control) (a), B (mucoadhesive paste with phenytoin) (b), and C (mucoadhesive paste without phenytoin) (c), 21 days after extraction, H and E stain, 40×. These images depict new bone formation. Blood vessels (red arrow), inflammatory cells (yellow arrow), osteocytes (green arrow) are seen. Well-developed haversian system can been seen in (b). Bone lining cells (dark blue arrow) marginate the bone matrix. Mineralized bone matrix (brown arrow) is seen having bone forming cells (light blue arrow) in proximity to its mineralization front (pink arrow).