Face Proportions, and Analysis of Maxillary Anterior Teeth and Facial Proportions in a Thai Population

Abstract

Background: Esthetics is the primary consideration for patients looking for prosthetic treatment. Determining the facial types of Thai populations is important because most studies conducted in Caucasian populations mention their facial types, and describe the gender comparisons, and GP of the teeth. Objectives: This study compared facial proportions, analyzed the maxillary anterior teeth proportions and determined the relationships between teeth with facial measurements using the Golden Proportion (GP) and Golden Standard (GS) in a Thai population. Methods: A total of 200 students (18-35 years) with well-aligned maxillary anterior teeth participated in this study. Face heights and widths were measured from the face using digital calipers and faces were classified as narrow, average, and broad. Teeth and face proportions were compared with GP and GS. One-way ANOVA was performed to compare maxillary anterior teeth proportions and facial proportions with different face types (α= 0.05). Pearson’s correlation was used (α= 0.05) to determine the correlation between facial proportion and teeth dimension among different facial types. Results: The findings showed 82.50% narrow face, 13.50% average, and 4% broad face among Thai subjects. No GP or GS was found in the face and anterior teeth, but teeth and face proportions other than GP and GS were found. No significant correlation was found between the Width of the Central Incisor (WCI) with interpupillary distance and alar width. Conclusion: In this study, the GP was not found in the facial and teeth proportion. The data obtained from this study may help to provide guidelines for prosthetic and orthodontic management and help to select the proper size and form of the maxillary anterior teeth to achieve proper esthetic outcomes in the Thai population.

Correlation of the golden proportion between the intercanine distance and the vertical measurement of the middle third of the face in fourth year students of the faculty of dentistry of the University of Cuenca, 2023

“…(15) In the present study, the relationship between the dimensions of intercanine distance and the dimensions of the middle third of the face according to the golden ratio of 1.618 was recorded and no significant relationship was found. Then, the results of the current study coincided with previous studies, that golden ratio does not exist in the study sample of fourth year students of the Faculty of Dentistry of the University of Cuenca, similar to the results of a study conducted by Wadud A. et al (2021) who concluded that no GP or GS was found in the comparison of the facial types with the 6 maxillary anterior teeth in their studied population.…”

Does Psychosocial Impact of Dental Aesthetics Questionnaire (PIDAQ) reflect the impact of malocclusion on facial aesthetics?

“…6 Recent studies on facial esthetic evaluation, the effect of an unfavourable inclination of the incisors on soft tissue aesthetics, the lack of acceptability of convex facial profiles induced by bimaxillary protrusion among black patients etc., have all referred to this index. [7][8][9] However, the psychosocial impact of altered facial aesthetics has never been investigated so far.…”