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Volumetric comparisons of total alveolar bone (A), all roots (B), and alveolar ridge (C). CG: control group; PGb and PGa: experimental group before and 8 weeks after the induction of periodontal disease, respectively. Error whiskers above each bar indicate standard deviations (SDs) in each group. Asterisk above the PGa histograms indicates p < 0.05 when PGa were compared with CG or PGb.
