Influence of posterior discrepancy in anterior open bite severity

Author(s)

Arón Aliaga Del Castillo

• Document type: Master's Dissertation
• Press: Bauru.
• Institution: Universidade de São Paulo (USP). Faculdade de Odontologia de Bauru (FOB/SDB)
• Defense date: 2017-02-15

Examining board members

Guilherme dos Reis Pereira Janson; Roberto Bombonatti; Marcos Roberto de Freitas; Fabrício Pinelli Valarelli

• Advisor: Guilherme dos Reis Pereira Janson

Abstract

Introduction: This study aimed to determine the effect of posterior discrepancy and third molar angulation on the overbite. Methods: Pretreatment lateral cephalograms of 131 subjects were analyzed. The sample included 83 open bite and 48 deep bite subjects. A multiple regression analysis was used to evaluate the influence of maxillary and mandibular posterior discrepancy and third molar angulation (predictor variables) on the overbite. Correlations between posterior discrepancy and third molar angulation, and correlations between predictor variables and dental angulation and height of posterior teeth and incisors were evaluated with Pearson´s correlation coefficient. Extreme subgroups with accentuated negative and positive overbites (27 open bite and 37 deep bite) were compared using T tests. Results: The multiple linear regression analysis showed a positive correlation of the mandibular third molar mesial angulation with the overbite. Posterior discrepancy was negatively associated with posterior teeth mesial angulation and dentoalveolar height. The deep bite subgroup showed significantly greater mesial angulation of the mandibular third molars than the open bite subgroup. Conclusion: There was no effect of the posterior discrepancy on the overbite. There was a positive correlation of the mandibular third molar mesial angulation with the overbite. (AU)

• FAPESP's process: 14/23771-5 - Influence of the posterior discrepancy on anterior open bite severity
• Grantee: Arón Aliaga Del Castillo
• Support Opportunities: Scholarships in Brazil - Master