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Cross-sectional study of correlation between mandibular incisor crowding and third molars in young Brazilians
Lilian-Harumi Karasawa1, Ana-Cláudia Rossi, Francisco-Carlos Groppo
1Department of Morphology, Anatomy area, Piracicaba Dental School, State University of Campinas - UNICAMP, Brazil.
Objectives:
The aim of this study was to evaluate transversally the clinical correlation between lower incisor crowding and mandible third molar.
Study Design:
Three hundred healthy volunteers (134 male and 166 female), aged 20.4 (±2.4) years-old were submitted to a complete clinical examination and filled up a questionnaire about gender, age, total teeth number and presence or absence of superior and inferior third molar. After a recent panoramic radiography were evaluated. The multiple logistic regression showed that none of the studied factors influenced the mandibular incisor crowding.
Results:
The proportion of both molars present or both absent was higher than the other conditions (Chi-square, p<.0001). The multiple logistic regression showed that any of the studied factors, influenced (p>.05) the mandibular incisor crowding. Despite the statistical significance, wear orthodontics appliances showed a little correlation (odds ratios < 1.0) in the mandibular incisor crowding.
Conclusion:
Presence of maxillary and/or mandibular third molars has no relation with the lower incisor crowding.
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