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<b>Objective:</b> To investigate the efficacy of periodontally accelerated osteogenic orthodontics (PAOO) in expanding the labial root movement range of maxillary anterior teeth in adult patients with skeletal Class Ⅲ malocclusion undergoing camouflage orthodontic treatment. <b>Methods:</b> A total of 42 adult patients with mild to moderate skeletal Class Ⅲ malocclusion undergoing camouflage orthodontic treatment at the Orthodontics Department of Hangzhou Stomatological Hospital from August 2016 to December 2024 were selected. The patients were divided into two groups based on whether PAOO was performed on the labial side of the maxillary anterior teeth (21 patients in each group): Experimental group received camouflage orthodontic treatment combined with PAOO; Control group received only camouflage orthodontic treatment. To further evaluate the efficacy of PAOO on tooth movement in different alveolar bone conditions, the experimental group was subdivided as follows: ①Based on the presence or absence of fenestration or dehiscence, the group was divided into fenestration group, dehiscence group, and non-bony defect group; ②Based on alveolar bone thickness before orthodontic treatment, the group was divided into thin alveolar bone group and thick alveolar bone group. Cone Beam Computed Tomography (CBCT) was used to analyze the indicators such as changes in the labial root displacement and alveolar bone thickness of 3, 6 and 9 mm below the CEJ of maxillary anterior teeth before (T0) and after (T1) orthodontic treatment. Lateral cephalometric radiographs were used to measure the A-point. <b>Results:</b> Compared with the control group, the experimental group showed a significant increase in alveolar bone thickness at 3, 6, and 9 mm below the CEJ of the maxillary anterior teeth (all <i>P</i><0.05). Compared with the non-bony defect group, the dehiscence group showed a significant decrease in labial displacement [non-bony defect group (1.00±1.18) mm; dehiscence group (0.31±0.70) mm; <i>t</i>=-2.18, <i>P</i>=0.034] and a significant increase in alveolar bone thickness [non-bony defect group (-0.05±0.83) mm; dehiscence group (1.38±1.17) mm; <i>t</i>=4.49, <i>P</i><0.001] at 3 mm below the CEJ. There were statistically significant differences in labial root displacement at 3 mm below the CEJ [thin alveolar bone group (0.54±0.79) mm; thick alveolar bone group (0.96±0.81) mm; <i>t</i>=-2.29, <i>P</i>=0.025], changes in alveolar bone thickness at 3 mm [thin alveolar bone group (0.49±0.70) mm; thick alveolar bone group (0.03±0.69) mm; <i>t</i>=2.89, <i>P</i>=0.009] and 6 mm below the CEJ [thin alveolar bone group(1.05±0.77) mm; thick alveolar bone group (0.57±0.97) mm; <i>t</i>=2.36, <i>P</i>=0.021] between the thin alveolar bone group and the thick alveolar bone group. <b>Conclusions:</b> Camouflage orthodontic treatment combined with PAOO can expand the labial movement range of the maxillary anterior teeth to a certain extent, facilitating safe labial displacement.At the completion of orthodontic treatment, sites with pre-existing bone dehiscence exhibit superior osteogenic outcomes. Furthermore, compared to those with thinner labial alveolar bone before orthodontic treatment, patients with thicker alveolar bone can achieve better labial movement outcomes.