The histological reaction of the local periodontal tissues.

H&E staining of the hematodes periodontal ligament and alveolar bone on the compressed side of the orthodontic tooth on the day 3 and day 7 after receiving orthodontics; R-tooth root, B-alveolar bone, P-periodontal ligament. The direction of the tooth movement is illustrated at the top (original magnification X100 on the left and X400 on the right).