Full text
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| Author(s): |
Karina Santana Cruz
Total Authors: 1
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| Document type: | Doctoral Thesis |
| Press: | Bauru. |
| Institution: | Universidade de São Paulo (USP). Faculdade de Odontologia de Bauru (FOB/SDB) |
| Defense date: | 2004-02-11 |
| Examining board members: |
Guilherme dos Reis Pereira Janson;
Julio de Araujo Gurgel;
Jose Fernando Castanha Henriques;
Alexandre Moro;
Adilson Luiz Ramos
|
| Advisor: | Guilherme dos Reis Pereira Janson |
| Abstract | |
The purpose of this research was to compare the available space and inclination of the mandibular and maxillary third molars between the Class I and Class II sides in subjects presenting Class II, subdivision malocclusions. An experimental group of 29 Class II, subdivision patients (17 males and 12 females) with a mean age of 14.73 years and a normal occlusion control group of 17 patients (11 females and 6 males) with a mean age of 21.73 years were used in this study. Two subgroups were selected among the total subdivision group according to the two different etiologies: Type 1 subgroup (18 cases) presented a coincidence of the maxillary dental midline with the facial midline and a deviation of the mandibular dental midline. Type 2 subgroup (6 cases) presented deviation of maxillary midline and coincidence of mandibular midline with the facial midline. One submentovertex, two obliques and one panoramic radiograph were taken from each of the 46 subjects of the groups. Dependent t tests were used to compare the available space and the third molar angular measurements of both sides among each group and subgroups individually. Independent t tests were used to compare the linear and angular asymmetries of the available space and angulation of the third molars between the experimental and the control groups. Results demonstrated that there were differences between the Class I and the Class II sides in the available space for the maxillary and mandibular third molars and in the angulation of the mandibular third molars in Class II subdivision malocclusions. In Type 1 Class II subdivision malocclusions the available maxillary and mandibular spaces and the mandibular third molar angulation reflected their characteristic dentoalveolar positioning in their apical bases in this type of malocclusion. In Type 2 Class II subdivision malocclusions the available maxillary and mandibular spaces and the mandibular third molar angulation tended to reflect their characteristic dentoalveolar positioning in their apical bases in this type of malocclusion. (AU) | |