Full text
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| Author(s): |
Patrícia Bittencourt Dutra dos Santos
Total Authors: 1
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| Document type: | Master's Dissertation |
| Press: | Bauru. |
| Institution: | Universidade de São Paulo (USP). Faculdade de Odontologia de Bauru (FOB/SDB) |
| Defense date: | 2011-01-21 |
| Examining board members: |
Guilherme dos Reis Pereira Janson;
Jorge Abrao;
Jose Fernando Castanha Henriques
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| Advisor: | Guilherme dos Reis Pereira Janson |
| Abstract | |
The purpose of this study was to evaluate the long-term behavior of the interlabial gap in Class I and Class II malocclusion subjects after orthodontic treatment and to investigate if interlabial gap behavior is related to lip length, facial pattern and treatment with or without extractions. Lateral head-films at the pre, posttreatment and long-term follow-up stages were obtained from 61 patients who initially had Class I (group 1) and Class II malocclusions (group 2) and with pre and posttreatment lip incompetence. There was significant interlabial gap reduction of 1.64 mm and 1.72 mm in groups 1 and 2, respectively, but there was no significant intergroup difference. Multiple linear regression was used to assess the relationship between lip length, facial pattern and non-extraction or extraction treatment with interlabial gap behavior. Non-extraction patients had significantly greater interlabial gap reduction (2.7 mm) than extraction patients (1.3 mm) in the long-term. Therefore it was concluded that the interlabial gap decreases similarly with time in treated Class I and Class malocclusion patients and that non-extraction treatment has greater interlabial gap reduction than extraction treatment. (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 |