Full text
| |
| Author(s): |
Roberto Henrique da Costa Grec
Total Authors: 1
|
| Document type: | Doctoral Thesis |
| Press: | Bauru. |
| Institution: | Universidade de São Paulo (USP). Faculdade de Odontologia de Bauru (FOB/SDB) |
| Defense date: | 2015-04-06 |
| Examining board members: |
Jose Fernando Castanha Henriques;
Fernanda Angelieri;
Acácio Fuziy;
Guilherme dos Reis Pereira Janson;
Mayara Paim Patel
|
| Advisor: | Jose Fernando Castanha Henriques |
| Abstract | |
The aim of this prospective study was to compare the dental, skeletal and soft tissue changes in youngsters with Class II malocclusion untreated and treated with First Class distalizer in conventional or skeletal achorage or with cervical headgear followed by fixed orthodontic appliances. The sample consisted of 44 patients with Class II malocclusion and divided into four groups of 11: patients treated with First Class distalizer with conventional anchorage (Nance button)(G1), treated with First Class distalizer with skeletal anchorage supported in two palatal mini-implants (G2), treated with cervical headgear (G3) and follow-up group with untreated patients (G0). Lateral cephalometrics radiographs were taken before treatment and after treatment in order to cephalometric analysis and evaluate the dental, skeletal and soft tissue changes and to compare with follow-up group (G0). Statistical analysis was performed by dependent t test to verify the changes occurred in the same group and by one-way ANOVA and Tukey test to verify the changes occurred between the groups. It was observed restriction and redirection of maxillary growth after treatment in G1 and G3. Mandibular skeletal effects were significant in G0. The values of skeletal maxilomandibular relationship decreased significantly in G1 and G3 with significant decrease of measurements that evaluated soft facial profile. All measurements of vertical component increased in G3. Maxillary first molars were distal tipping in G2 and lower first molars were mesial tipping in G3. The four groups showed extrusion in the upper and lower teeth. The three experimental groups showed significant decreased in the molar relationship, overjet and overbite. It concluded that experimental groups corrected the Class II malocclusion efficiently, cervical headgear showed skeletal and dental effects and the groups with distalizers showed only dental effects. The mean treatment period was significant lower with cervical headgear. (AU) | |
| FAPESP's process: | 11/17126-1 - Comparative cephalometric evaluation of Class II malocclusion treatment with First Class distalizer in conventional and skeletal anchorage and cervical headgear followed by fixed orthodontic appliance |
| Grantee: | Roberto Henrique da Costa Grec |
| Support Opportunities: | Scholarships in Brazil - Doctorate |