This is a cross-sectional study in which 161 patients were selected using a method of consecutive non-probability sampling of cases, of both sexes, and with ages ranging between 13 and 55 years of age, attending the University Clinic of Orthodontics Alfonso X Madrid, with no previous orthodontic treatment or orthodontics without deciduous teeth and in which extraction of the third molars has not been done. Of the patients, 70.8% had the upper third molars. Using the Shiller method, which measures the angle of the third molar to the occlusal plane, 32% of third molars were observed with a distoangular inclination (11-70º distally), 19.5% vertical (0-10º maximum mesial or distal), and 19.2% mesioangular inclination (11-70º mesially). A statistically significant relationship (p < 0.05) between the upper third molar angulation with the stage of eruption of the third molar and upper right angulation, dental bone discrepancy, the inclination of the incisors and the alignment of the posterior sectors was observed.
(Rev Esp Ortod. 2016;46(3):122-129)