The Influence of Smile Arc by Bracket Position Modification: A Prospective Clinical Study

• Published in: Journal of Indian Orthodontic Society Vol. 54; no. 1; pp. 49 - 57
• Main Authors: F., Yunus Amin, R., Priya, R., Devaki Vijayalakshmi, Karthik, L.
• Format: Journal Article
• Language: English
• Published: New Delhi, India SAGE Publications 01-01-2020
• Subjects: maxillary canine; flat smile; Smile arc; maxillary lateral incisor
• ISSN: 0301-5742; 0974-9098
• DOI: 10.1177/0301574219886388

Abstract
Objective: The purpose of this study was to assess the effects of McLaughlin, Bennett, and Trevisi Bracket Positioning in patients with ideal smile arc and to assess the efficacy of McLaughlin, Bennett, and Trevisi by modifying anterior bracket position among patients with flat smile arc in pretreatment and postalignment phases.
Methodology: A total of 30 subjects divided into 2 groups (group A: 15 subjects with ideal smile arc, and group B: 15 subjects with flat smile arc) were made to participate in this study. A flat smile arc was converted to an ideal smile arc in group B subjects by bracket position modification, and an ideal smile arc was maintained in group A subjects. While paired student t test was performed to find the level of significance in tip and torque values, Mann–Whitney test was used to find the mean difference in intercanine width and visual analogue scale.
Results: Wilcoxon signed ranks test was used to determine the statistically significant changes observed in torque in relation to all the maxillary anteriors. The results showed that tip values in maxillary lateral incisors and torque values in maxillary canines of group B were statistically significant.
Conclusion: A good amount of intrusion was seen in maxillary canines, which helped in the correction of the smile arc.