Prognosis between superior permanent canines teeth eruption axis and second lower molars space for eruption

Vol. 13 – Number 50 – 2020 Original article Page 84-88 Prognosis between superior permanent canines teeth eruption axis and second lower molars space for eruption Gleida Guimarães¹ Carolina Carmo de Menezes¹ Silvia Amélia Scudeler Vedovello¹ Milton Santamaria Jr¹ Viviane Veroni Degan¹ Mário Vedovello Filho¹ Abstract This study aimed to associate malposition of lower second molar germ with the upper permanent canine teeth eruption axis in the mixed dentition. The sample included 506 digital panoramic radiographies taken in the mixed dentition inter-transitional period in the age group of 7 to 10 years of both sexes. The canines were assessed by dividing the anterior portion of the hemiarch into five sectors, in which sector 1 was the best position for the correct eruption axis and 5 was the worst. For locating the lower second molar germ, a horizontal distance was used between the distal aspect of the lower first molars and the anterior margin of the mandibular ramus. The data was analyzed with frequency distribution and logistic regression tables, estimating crude Odds Ratio and respective confidence intervals. There was no significant association between sex and upper permanent canines eruption axis (p>0.05). There was association between the lower second molars malposition and canines eruption axis. Participants with malposition of lower second molars presented 3.40 (95% CI, 2.12-5.47) times more likely to present upper permanent canines eruption axis malpositioned. It was concluded that there was association between the malposition of lower second molars and the canine eruption axis. Descriptors: Canine tooth, molar tooth, tooth germ, preventive Orthodontics, interceptive Orthodontics. ¹ Hermínio Ometto Foundation, Department of Orthodontics – Araras – SP – Brazil.