Published Paper Details:

Background: The dental arch width is influenced by both genetic and environmental factors, with tongue posture being a significant environmental contributor. Understanding how tongue posture affects dental arch width in different classes of malocclusions can guide non-invasive orthodontic interventions. Objective: To investigate the relationship between tongue posture and dental arch width in individuals with Class I, II, and III malocclusions. Methods: This cross-sectional observational study included 450 participants aged 10-25, categorized into three groups based on their malocclusion class. Tongue posture was assessed using clinical examination and digital imaging, while dental arch width was measured using a 3D intraoral scanner. Statistical analyses included multiple regression and ANOVA. Results: Tongue posture was found to significantly affect dental arch width. In Class I malocclusions, optimal tongue posture was associated with the widest dental arches. In Class II, forward tongue posture correlated with narrower arches, and in Class III, it was linked to increased mandibular width. Conclusion: The study underscores the importance of tongue posture in influencing dental arch dimensions across different malocclusion classes. Addressing tongue posture in orthodontic treatment may enhance therapeutic outcomes.