Fig. 4
Animal Model and H&E Staining. C represents the control group, while 0–5 correspond to various levels of laser radiation characterized by energy densities of 0 J/cm2, 1.7 J/cm2, 3.5 J/cm2, 5.3 J/cm2, 7.1 J/cm2, and 8.8 J/cm2. A Establishment of the Orthodontic Tooth Movement Rat Model. (B) Statistical Analysis of Mesial Movement Distance of the Left Maxillary First Molar in Each Group (*: P < 0.05, compared to the OTM group). C-D Hematoxylin and Eosin (H&E) stained sections (40×, upper row, scale bar = 500 μm; 100×, lower row, scale bar = 200 μm). P denotes the Periodontal Ligament; Ab signifies Alveolar Bone; R represents Tooth Root