Three-dimensional analysis of posterior tooth inclinations in transverse and sagittal relationships: A cross-sectional study

• Published in: International orthodontics 2024-03, Vol.22 (1), p.100824, Article 100824
• Main Authors: de Oliveira e Silva, Guto, Mendes, Thiago Santos, Carneiro, Diego Patrik Alves, Menezes, Carolina Carmo de, Vedovello, Silvia Amélia Scudeler, Terossi de Godoi, Ana Paula
• Format: Article
• Language: English
• Subjects: Angle malocclusion; Dental arch; Dental occlusion; Dentoalveolar compensation; III; Mandible; Maxilla; Skeletal class I II; Transverse skeletal malocclusions
• ISSN: 1761-7227
• DOI: 10.1016/j.ortho.2023.100824

To compare tooth inclinations in different sagittal skeletal patterns and transverse maxillary relationships three-dimensionally. A cross-sectional study carried out with 132 three-dimensional digital models in the complete permanent dentition divided into six groups (n=22); three groups with maxillary atresia: G1- skeletal class I, G2- skeletal class II and G3-skeletal class III; three groups without maxillary atresia: G4- skeletal class I; G5- skeletal class II and G6- skeletal class III. The comparison between the skeletal pattern was performed by the non-parametric tests of Kruskal Wallis and Dunn and between the groups by the non-parametric test of Mann Whitney. Subjects with skeletal class II and maxillary atresia had a greater lingual inclination of the maxillary teeth than those with class I and III; Subjects with skeletal class II without atresia had a less lingual inclination of the mandibular molars than the other classes (p0.05). The mandibular premolars showed that the groups without atresia G4, G5, and G6 presented no significant difference (p>0.05). Lower premolars in skeletal class III malocclusion individuals with atresia had a more negative inclination than the others. There is a difference in the inclination of posterior teeth between individuals with and without maxillary atresia and skeletal classes I, II, and III.