Full text
| |
| Author(s): |
Eduardo Beaton Lenza
Total Authors: 1
|
| Document type: | Doctoral Thesis |
| Press: | Bauru. |
| Institution: | Universidade de São Paulo (USP). Faculdade de Odontologia de Bauru (FOB/SDB) |
| Defense date: | 2012-10-23 |
| Examining board members: |
Guilherme dos Reis Pereira Janson;
Flávio Augusto Cotrim Ferreira;
Marcos Roberto de Freitas;
Mauricio Tatsuei Sakima;
José Eduardo Prado de Souza
|
| Advisor: | Guilherme dos Reis Pereira Janson |
| Abstract | |
The purpose of this study was to cephalometrically compare the dentoskeletal and soft-tissue changes consequent to orthodontic treatment in patients with Class II subdivision malocclusion treated with asymmetric extraction protocols. The sample consisted of 126 lateral cephalograms of 63 patients, divided into two groups. Group 1 consisted of 32 patients with Class II, subdivision malocclusion, and had initial and final mean ages of 13.98 and 16.90, treated with asymmetric extraction of one maxillary premolar on the Class II side. Group 2 consisted of 31 patients with Class II, subdivision malocclusion, and had initial and final mean ages of 13.58 and 16.83, treated with asymmetric extractions of two maxillary premolars and one mandibular premolar on the Class I side. T tests were used to compare the groups at pretreatment and the treatment changes between groups. The results demonstrated that group 1 had mandibular incisor protrusion, while group 2 had lower incisor retraction. The maxillary molar asymmetry index increased in group 1, on the contrary of group 2 that had mandibular molar asymmetry index increase. Both groups had similar soft-tissue changes. (AU) | |
| FAPESP's process: | 09/15135-3 - Comparative study of cephalometric changes in Class II, subdivision treatment with asymetric extraction protocols. |
| Grantee: | Eduardo Beaton Lenza |
| Support Opportunities: | Scholarships in Brazil - Doctorate |