牙周炎患者不同程度牙槽骨吸收对不同缺牙区骨密度的影响OA

Objective To evaluate the relationship between bone density and bone resorption degree in the tooth-removal area using cone-beam computed tomography(CBCT),and to provide effective basis for clinical implant preoperation evaluation.Methods A total of 460 patients with missing teeth who were admitted to the Department of Stomatology,the Third Medical Center of PLA General Hospital from November 2020 to November 2021 were selected.After CBCT imaging,all patients were divided into groups no alveolar bone resorption group,degree Ⅰ alveolar bone resorption group,degree Ⅱ alveolar bone resorption group and de-gree Ⅲ alveolar bone resorption group,based on the degree of alveolar bone resorption.The average bone density values of the anterior teeth,premolars and molars of each group were measured and statistically analyzed.Results For the anterior teeth and premolars,there were significant differences in bone density values among the four groups(P<0.05),and the degree of alveolar bone resorption was correlated with bone density(r=-0.42,r=-0.37;P<0.01);there was no statistically significant difference in bone density in the molars.The anterior teeth area showed a significant negative correlation(r=-0.31)in the 41-60 years age group.There was no significant correlation between age and bone mineral density in the anterior molars area and molars area groups,nor was there a signifi-cant correlation between gender and bone mineral density.Conclusions Except for grade Ⅲ bone resorption,the bone density in the missing areas of anterior teeth and premolars decreases with the increase of the degree of alveolar bone resorption.