Morphological Study Of Alveolar Bone To Maxillary Molars By CBCT

This study utilized dental cone-beam computed tomography (CBCT) to analyze the morphological characteristics of the alveolar bone distal to maxillary second molars.aiming to provide anatomical guidance for the implantation of orthodontic miniscrews in the distal region of maxillary second molars. CBCT scans of 72 patients without the third maxillary molar were randomly selected. Patients were divided into three groups: 14–25y, 26–35y, and 35–44 y. CBCT cross-sectional measurements were adjusted parallel to the maxillary occlusal plane, passing 6 mm apically from the distal cementoenamel junction (CEJ) of the maxillary second molar. Measurements of the maxillary tuberosity (length, width, and height) were taken at positions with equal buccal and palatal bone volume. The length, width, and height of the alveolar bone distal to the second molar (maxillary tuberosity) across age subgroups were: 14–25 years: 5.7±3.3 mm, 4.7±2.9 mm, 3.8±2.3 mm -26–35 years: 6.2±3.4 mm, 7.9±3.1 mm, 7.3±2.7 mm -35–44 years: 7.6±2.9 mm, 9.2±2.9 mm, 8.5±3.3 mm ANOVA revealed that in the absence of third molars, the length, width, and height of the maxillary tuberosity distal to the second molar increased with age, accompanied by expansion of the posterior arch width/height and facial depth.