The Classification of Impacted Third Molar and Their Relationship with Caries on the Second Molar

Background: The eruption and positioning of teeth play crucial roles in dental health, with the third molars, commonly known as wisdom teeth, often prone to impaction. Impaction occurs when a tooth fails to emerge properly due to various factors, leading to potential complications such as caries, pericoronitis, and cystic lesions. Understanding the epidemiology and consequences of impacted third molars is essential for effective dental management. The aims of this study are to assess the frequency and positioning of impacted third molars and to examine their association with caries formation on the distal surface of adjacent second molars. Methods: Panoramic radiographs of 705 patients meeting inclusion criteria were analyzed to assess the prevalence and positioning of impacted third molars. The study employed classification systems to categorize impacted teeth and examined their relationship with caries formation on the distal surface of adjacent second molars. Results: Vertical angulation was predominant among impacted third molars, with position C being most prevalent. Statistical analysis revealed a significant association between horizontal angulation and position A with caries occurrence on the distal surface of second molars. Conclusion: The study underscores the importance of evaluating impacted third molars and their relationship with caries development on adjacent teeth. Prophylactic removal of vertically and mesioangularly positioned third molars, particularly those in position A, may be advisable to mitigate the risk of caries formation on second molars.