Prevalence of Mandibular Third Molar Impaction Cases on Panoramic Radiographs in 2022

Introduction: Tooth impaction is a condition when a tooth does not erupt, either partially or completely after the normal eruption time has passed. Mandibular third molars are one of the teeth most frequently impacted. Impacted third molars are classified according to Pell-Gregory and George Winter. Previous studies state that gender and age can influence impacted mandibular third molars. This study aims to determine the prevalence of cases of impacted mandibular third molars at the Dental and Oral Hospital of South Sumatra Province in 2022. Methods: This type of study is descriptive observational using 327 of the total population of 709 patient panoramic radiographs in 2022, and identified directly to see impacted mandibular third molars. Reliability testing was carried out using Cohen's Kappa analysis. Results: Evaluation of 327 panoramic radiographs containing impacted mandibular third molars showed that the most common age category was 16-25 years with 229 cases (70.03), based on gender, female 193 cases (59.03%) and male 134 cases (40.97%). Based on the Winter classification, mandibular impaction is most found in the mesioangular position in tooth 38 (55.97%), tooth 48 (49.65%). Based on the Pell and Gregory classification, most mandibular impactions are found in position II A in tooth 38 (42.66%), 48 (44.70%). Conclusion: The prevalence of cases of mandibular third molar impaction at the Dental and Oral Hospital of Sumatra Province was 46,12%, most commonly found in the 16-25 year age category,more frequently in women, and the position was mostly in the mesioangular category and position IIA. Keywords: Impaction, mandibular third molar, panoramic.