Evaluation of Smile Components in Males of Skeletal Class III compared to Skeletal Class I
Abdallah S Nouh, HM Abdel Majeed and Essam Mohamed Nassef Selim
Published: October 01, 2021.
Abstract
Objective: Smile plays a vital role in facial appearance. The current study was performed to evaluate the smile parameter variations between Class I and Class III male subjects aiming to obtain a full understanding to smile features serving in diagnosis and treatment planning for highest patient satisfaction.
Materials and Methods: This study was performed on 30 skeletal Class III and Class I males. Two frontal digital photographs were taken for each subject, one at rest and the other in the posed smile position. Photographs were uploaded on Photoshop software for standardization and then uploaded on the Digital Smile Design software (DSD) where the actual incisogingival height of the central incisor was used for automatic calibration.
Results: At rest, there was no significant difference for all soft tissue measurements of Class I and Class III males, while on smiling, Class III males tended to have wider smile widths, less incisor display, wider smile width and a higher percentage of non-consonant and flat smile arcs than normal Class I subjects.
Conclusions: The maxillary incisor display for Class I was found to be significantly greater than that for Class III. The smile width and smile height for Class III was found to be significantly greater than that of Class I.
Keywords: Class III males; Esthetics; Malocclusion; Smile