Relationship between maxillary anterior alveolar arch form and tooth root axis in class i occlusion: a cone beam computed tomography study

Abstract

Purpose: This study determined the relationships of the angulation between tooth root axis and alveolar bone axis to the anterior alveolar (AA) arch forms and the sagittal root position (SRP) classification in anterior esthetic region using cone-beam computed tomography (CBCT) images.

Materials and Methods: CBCT images which met the inclusion and exclusion criteria were classified according to a novel classification of AA arch forms (Bulyalert 2018) and a SRP classification (Kan 2011). Then, the angulations of the root axis and the alveolar bone axis were measured using the mid-sagittal CBCT images of each tooth. The relationship of the angulations in each AA arch forms and the SRP classifications were evaluated using one-way ANOVA and linear regression model.

Results: 98 CBCT images were included in this study. The correlation of the angulations of the root axis and the alveolar bone axis to the SRP classification was greater than that to the classification of AA arch form. However, the relationship of the angulation of root axis and the alveolar bone axis to both the AA arch form classification and the SRP classification could be predicted.

Conclusion: The angulations of root axis and alveolar bone axis demonstrated the relationship to the classification of AA arch forms and the SRP classification. Therefore, this information could help implantologist in treatment planning.