Radiographic Evaluation of Third Molar（M3）Agenesis in Indian Population

Abstract

The aim of our study was to investigate the prevalence and patterns of M3 agenesis in the population of hilly state of H.P. (India) . An observational radiographic study was conducted in the age range of 13 -56 years from Feb 2019 -May 2020 in tertiary care center. Total 540 panoramic radiographs were included in the study based on inclusion and exclusion criteria. The panoramic radiographs were evaluated for the agenesis of third molars and data was recorded on the predesigned performa. Statistical analysis was done using Chisquare test (p<0.05) Out of 540 patients, 151 (27.9%) patients showed M3 agenesis.M3 agenesis was reported 53.6% in males and 46.4% females. There was statistically significant difference in frequency of type of quadrant involvement in males (χ 2 =8.59,P=0.03) and in females (χ 2 =10.64, P=0.01) both. All four M3 agenesis was more in males (33.3%) than females (7.1%) , single M3 agenesis was seen more in females (41.4%) than males (30.8%) . The prevalence of third molar agenesis was found to be 27.9%. Males affected more than females. Maxilla shows more M3 agenesis in compared to mandible. Right side of jaw exhibited more M3 agenesis than left side. The pattern of M3 agenesis was single third molar missing> two third molars missing> all four third molars missing> three third molars missing (1>2>4>3) .