Alveolar bone morphometric analysis area. Analysis of alveolar bone morphometry was done at the interradicular bone of first molar, represented by the red line. Bone volume fraction (BV/TV), trabecular number (Tb.N), trabecular thickness (Tb.Th), and trabecular separation (Tb.Sp) were analyzed. Alveolar bone loss height was measured at the distance between CEJ  to ABC . CEJ-ABC represented by  at all four sites of mesiolingual (ML), mesiobuccal (MB), distolingual (DL), and distobuccal (DB) sections of the first molar. AB, alveolar bone; CEJ, cementoenamel junction; ABC, alveolar bone crest; CEJ-ABC, distance of cementoenamel junction to alveolar bone crest; M1, first molar; M2, second molar; M3, third molar.