Dental Transposition: Prevalence in Students in the City of João Pessoa, PB, Brazil

Luciana Ellen Dantas COSTA, Ricardo Cavalcanti DUARTE, Maria Luíza dos Anjos PONTUAL, Ricardo Vilar BELTRÃO, Rejane Targino Soares BELTRÃO

Abstract


Objective: To evaluate the prevalence of dental transposition in 8-15-year-old students attending public schools in the city of João Pessoa, PB, Brazil.
Method: The sample was composed of 1,263 individuals attending nine schools chosen by chance in two stages, based on the probability proportional to the size of the conglomerates. All subjects were examined, being selected those presenting alterations such as insufficient space for eruption, over-retention of primary teeth, dental agenesis and ectopic eruption. Periapical radiographs were taken from 30 of these subjects to confirm the diagnosis of transposition. The data were tabulated in the SPSS software (Statistical Package for Social Sciences; v. 11.0) and a descriptive analysis was performed.
Results: Four individuals (0.32%) aged 8.1 to 13.1 years (mean age: 11.1 ± 2.2 years) presented dental transposition in both arches, more frequently in the mandible (75%), and all cases were unilateral and in the left side. In the mandibular arch, the transpositions were lateral incisor with canine, while in the maxillary arch they were central incisor with lateral incisor. Regarding the possible etiology, factors such as heredity (50%), over-retention of primary teeth (50%) and trauma (25%) were observed in the affected individuals. In 75% of the cases, there was association with dental anomalies, such as tooth rotation, early tooth loss, over-retention of primary teeth or tooth impaction.
Conclusion: Although rare, dental transpositions affect the general population, demonstrating the need of early diagnosis to avoid dental losses and occlusal alterations.

Keywords


Anormalidades dentárias; Erupção dentária; Ortodontia; Tooth abnormalities; Tooth eruption; Orthodontics.



DOI: http://dx.doi.org/10.4034/pboci.v10i1.819

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