title: incidence of third molar impaction . a radiographic study in saveetha dental college , chennai

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Alladi Sneha, Prof Dr. Hemavathy O . R Muralidoss, Dr . Pradeep Dhasarathan



Third molars are the most frequently impacted teeth because of their particular topography , phylogeny and ontogeny

AIM : To evaluate the position of the impacted third molars based on the classification of Pell and Gregory and winter in a sample of chennai population.


In this retrospective study , up to 11000 Orthopantomograms (OPG) of the patients who reported to Saveetha Dental College from December 2020 to January 2022 were evaluated ​



Among 11000 patients , 7100 were male and 3900 were female patients . Of the 11000 OPGs studied, 3,9100 third molars were noticed either impacted or erupted and 4900 third molars were missing. The most common angulation of impaction in the mandible was in vertical position (41.4%) followed by mesioangular impaction (33.3%) and the most common angulation of impaction in the maxilla was the vertical (67.4%) which was followed by 15.2% in distoangular impaction

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