Interlabial gap behavior with time

Author(s)

Janson, Guilherme ; Dutra dos Santos, Patricia Bittencourt ; Garib, Daniela Gamba ; Francisconi, Manoela Fvaro ; Baldo, Taiana de Oliveira ; Barros, Sergio Estelita

• Document type: Journal article
• Source: JOURNAL OF THE WORLD FEDERATION OF ORTHODONTISTS; v. 2, n. 4, p. 5-pg., 2013-12-01.

Abstract

Background: The purpose of this study was to evaluate the long-term behavior of the interlabial gap in patients with Class I and Class II malocclusion after orthodontic treatment and to investigate whether interlabial gap behavior is related to treatment with or without extraction. Methods: Lateral head-films at the pre- and post-treatment and long-term follow-up stages were obtained from 61 patients who initially had Class I or Class II malocclusion and with pre- and post-treatment lip incompetence, who were treated with or without extraction. Dependent and independent Student's t tests were used for the intra-and intergroup comparisons. Results: There were significant interlabial gap reductions of 1.64 and 1.72 mm in Class I and II, respectively, but there was no significant intergroup difference. Nonextraction patients had significantly greater interlabial gap reduction (2.7 mm) than did extraction patients (1.3 mm) in the long-term. Conclusions: It was concluded that the interlabial gap decreases significantly and similarly in treated Class I and Class II malocclusion patients and that nonextraction treatment has greater interlabial gap reduction than does extraction treatment in the long-term post-treatment period. (C) 2013 World Federation of Orthodontists. (AU)

• FAPESP's process: 09/06927-3 - Longitudinal study of unsealed lips behavior at rest
• Grantee: Patricia Bittencourt Dutra dos Santos
• Support Opportunities: Scholarships in Brazil - Master