Effect of change in Mesiodistal Angulation of the Maxillary Central Incisors on mean attractiveness score of the Smile in Frontal view in local Population

Abstract

Introduction: This study explored how changing the mesio-distal inclination of the maxillary central incisors influence the perceived smile attractiveness, as assessed by orthodontic residents and laypersons .

Methodology: Four Smile simulations based upon mesio-distal inclination were created at (?4º), (+4º and +8º) and control image (0º).  102 orthodontists/orthodontic residents and 102 laypersons assessed these images by rating them from 0–100 attractiveness scale (0 = very unattractive; 100 = very attractive). Photographs were printed and distributed with questionnaires for evaluation.

Results: Attractiveness scores declined progressively with greater mesiodistal inclination. No statistically significant differences were found between orthodontists, trainees, and laypersons. Lay participants were less likely to detect subtle changes, while orthodontic trainees demonstrated higher accuracy, particularly with lower facial third views compared to full-face views.

Conclusions: Alterations in mesiodistal angulation of maxillary central incisors did not significantly influence smile attractiveness perception across genders or between professional and non-professional evaluators (p > 0.05).