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Mean ± standard deviation of the data of the distance between the CEJ and ABC (mm) of the alveolar bone area between the first and second maxillary molars in each group. Notes: ∗compared with the control 3 group (P < 0.05; ANOVA). &Compared with the control 3 group (P > 0.05; ANOVA). †Compared with the control 3 group (P = 0.068; ANOVA). ANOVA, analysis of variance.
