Revista Dental Press de Ortodontia e Ortopedia Facial
On-line version ISSN 1980-5500
SELLA, Rodrigo Castellazzi; MENDONCA, Marcos Rogério de and CUOGHI, Osmar Aparecido. Panoramic evaluation of the mesiodistal angulations of canine teeth, premolar and inferior molars with and without the presence of the third molars. Rev. Dent. Press Ortodon. Ortop. Facial [online]. 2009, vol.14, n.6, pp.97-108. ISSN 1980-5500. http://dx.doi.org/10.1590/S1415-54192009000600012.
AIM: To compare the normal mean values of the mesiodistal axial angulation, proposed by Ursi in 1989, with the mesiodistal axial angulation of canine teeth, premolar and inferior molars in individuals with and without the presence of the third inferior molars and ages between 18 and 25 years. Besides, the values of the mesiodistal axial angulation of these teeth were compared in these two situations. METHODS: Forty panoramic x-rays were used from individuals of both genders that didn't receive orthodontic treatment, divided in two groups: Group I, constituted by 20 x-rays that didn't present the third inferior molars, and Group II, formed by 20 x-rays with the presence of the third inferior molars. RESULTS AND CONCLUSIONS: The results analysis and the statistical analysis allowed to conclude that both Groups exhibited inferior premolar and molars more angled in mesial direction when compared to the normal occlusion. On the other hand, the mesiodistal axial angulation of inferior canine teeth was similar to the presented in cases of normal occlusion. The two groups, when compared amongst themselves, exhibited similar angular values of the canine teeth, premolar and inferior molars, so that the presence of the third molars didn't exercise influence on these dental angulations.
Keywords : Third molar; Panoramic x-ray; Tooth angulation; Tooth movement.