Use of Panoramic Radiography to Detect Prevalence of Impacted Third Molar AmongChineseStudents In Faculty of Dentistry, University of Sumatera Utara

Abstract

Impacted tooth is defined as normal eruption path of tooth that being blocked, normally by adjacent tooth or pathology tissue until its did not grow ideally on dental arch. Third molar is the latest eruption tooth in oral cavity, between 18-25 years old, This condition may causes third molar more frequently impacted compare to other tooth due to lack of space for eruption. This study aims to know the prevalence of impacted third molar on Chinese students seen from panoramic radiography in Faculty of Dentistry, University of Sumatera Utara (USU). This research was descriptive with sample of 50 Chinese students consisting of 14 males and 36 females that experiences impaction of third molar. Sample taking method used was purposive sampling. The research was conducted in Radiology Department, Faculty of Dentistry USU. The results of research showed the prevalence differences on maxilla and mandibular between men and women. In conclusion, the horizontal angulation in the mandible and vertical angulation in the maxilla were the most common angular position. Type A in the mandible and type B in the maxilla were the most common types of impaction's depth. Relationship between the position of the tooth to distal of second molar on mandible more cases on class II. This research showed prevalence impacted third molar on women were 75,78% and men were 24,22%. Ratio between women to men was 3,1:1. Keyword:Impacted third molar, Panoramic radiography, Chinese students