Authors : Banari A, Datana S, Agarwal SS, Bhandari SK
DOI : 10.18231/j.jco.2019.032
Volume : 3
Issue : 4
Year : 2019
Page No : 1-6
Aim and Objective: To evaluate buccolingual inclinations of first molars among untreated individuals with different facial pattern using Cone Beam Computer Tomography (CBCT).
Material and Method: This cross-sectional study was conducted using pre-treatment CBCT records of 45 patients selected from the institutional archives, 15 each were grouped as Group 1, Group 2 and Group 3 categories (normodivergent, hypodivergent and hyperdivergent facial pattern). CBCT images were standardised by rotating the sagittal slice, so that the FH plane was oriented parallel to the true horizontal. The long axis of each first molar was determined, and the inclination of each molar was measured using the long axis and the floor of maxillary sinus. Statistical analysis was done for tooth inclination measurements to determine whether there were significant differences.
Results: The maxillary molars exhibited buccal inclination of 5.55 ± 2.52 deg, 6.54 ± 3.52 deg and 8.09 ± 2.69 deg respectively in Group 1, Group 2 and Group 3 on right side, 7.83 ± 2.44 deg, 8.31 ± 4.00 deg and 9.45 ± 2.50 deg respectively on left side. The mandibular molars exhibited lingual inclination of 8.27 ± 4.24 deg, 8.57 ± 4.04 deg and 8.91 ± 2.85 deg on right side, 7.83 ± 2.44 deg, 8.31 ± 4.00 deg and 9.45 ± 2.50 deg on left side. Statistically significant differences were found between groups 1 and 3, but not between groups 2 and 3.
Conclusion: From this study, variations in mean molar inclination values are observed between Normodivergent, Hypodivergent and Hyperdivergent groups. The conclusion drawn from the study is that there is buccal inclination in maxillary molars and lingual inclination in mandibular molars. Hyperdivergent subjects have relatively more buccal inclination in maxillary molars and lingual inclination in mandibular molars when compared to Hypodivergent subjects and Normodivergent subjects.
Keywords: Buccolingual inclination, untreated adults, facial pattern.