Prevalence of Impacted Mandibular Third Molar and its Relationship Based on Pell & Gregory Classification

Objective: Tooth impaction arises due to insufficient space in the retromolar. Impaction of third molar teeth can cause various oral health problems,  such as discomfort when chewing,  caries, periodontal disease, TMJ disorder, root resorption and even cysts in the jaw. The prevalence of impacted teeth  worldwide varies between 16.7% and 68.8%. Research Method:   pictorial review using consecutive sampling methods. The impaction class relationship was carried out Chi square test to see the impaction class relationship on teeth 38 and 48. Results: The prevalence of third molar tooth impaction is more prevalent in women and dominates in the age group of 21-30 years. Based on the classification according to Pell & Gregory, the highest prevalence among 48 region is class 1, whereas among 38 region is class 2. From the chi square test, the result was p = 0.000 (p < 0.05), demonstrating a statistically significant association between region 38 and 48 in class   1, 2 and 3. Conclusion: There is a relationship between the impaction class of the left and right mandibular third molar. Knowledge of the impaction class of third molar teeth can minimize post odontectomy complications. Keywords: mandible, third molar, Pell & Gregory impaction classification