Resumen de Cross-sectional study of correlation between mandibular incisor crowding and third molars in young Brazilians

Lilian Harumi Karasawa, Ana Claudia Rossini Venturini, Francisco Carlos Groppo, Felippe Bevilacqua Prado, Paulo Henrique Ferreira Caria

• 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.