IJSR International Journal of Scientific Research 2277 - 8179 Indian Society for Health and Advanced Research ijsr-9-6-25379 Original Research Paper INCIDENCE OF CARIES IN MANDIBULAR SECOND MOLARS DUE TO IMPACTED MANDIBULAR THIRD MOLARS- A PRELIMINARY STUDY. Kukreja Dr. Ahad Fahd Al Qahtani Dr. Majedah Fahd Al Qahtani Dr. June 2020 9 6 01 02 ABSTRACT

Aims and Objectives: The present study aimed to determine the incidence of dental caries in the mandibular second molars due to different types and angulations of impacted third molars. Materials and Method: In the present retrospective anonymous radiographic study, a large database of 290 dental pantomograms showing 501 impacted teeth were analyzed. The impaction was classified into mesioangular, horizontal, vertical, distoangular and inverted. The number of impacted teeth, angulation of the impacted tooth, and presence or absence of caries in mandibular second molar were noted. The information so received was recorded and analysed. Statistical evaluation of the data was done and p ≤ 0.05 was considered as a statistically important (with 95% confidence interval). Chi–square test for goodness of fit was implemented to find the association among caries and mandibular last molar impaction. Result: The mesioangular impaction was the most common impaction (27.14%) and the inverted was the least common (1.59%). The caries incidence in second molar was highest (35.59%) in mesioangular impacted teeth, followed by distoangular (24.57%). Statistical significance was seen in mesioangular (p=0.005) and in horizontal (p=0.00016). The other types of impactions did not show any statistical significance. Conclusion: The mesioangular and vertical type of impactions are the most commonly occurring patterns of impacted teeth. The caries incidence is significantly higher in mesioangular and horizontal types impactions