Dental anomalies of number in orthodontic patients

Abstract

Introduction

The prevalence and distribution of dental anomalies of number vary according to the population studied.

Objective

To determine the prevalence of dental anomalies of number by assessing the frequency of hypodontia and hyperdontia regarding gender, the region of the maxila or mandible and the most affected teeth.

Method

The panoramic radiographs of 1054 patients, aged 5 to 30 years, from a private diagnostic imaging clinic were evaluated. Gender, age, presence or absence of abnormality, affected teeth and region were compared. Chi-square statistical tests and Pearson Test Binominal for two proportions were carried out.

Result

The prevalence of hypodontia was 4.9% and it was more frequent in the maxilla. There were no significant differences between the left and right side of the maxila or genders. The most frequently missing teeth were the maxillary lateral incisors and mandibular second premolar. The prevalence of hyperdontia was 4.0%. There were no significant differences between genders, right or left side of the maxila or mandible. The regions most frequently affected were distal to the third molars and between mandibular premolars.

Conclusion

The prevalence of hypodontia was 4.9% and it was more frequent in the maxilla. The prevalence of hyperdontia was 4%. No significant differences between genders and the maxillary or mandibular region were found.

Descriptors:
Prevalence; hypodontia; supernumerary