Abstract Objectives: To determine the prevalence of a pattern of mandibular third molar impactions in the Malaysian population who visited a private university oral health centre. Materials and Method: A total of 170 cone beam computed tomography (CBCT) radiographs were selected from Malaysia’s private university’s oral health centre. The radiographic measurements were carried out using the ExamVisionQ CBCT software program. The impaction patterns were classified according to Winter’s classification and Pell & Gregory classification. The angulation of impacted mandibular third molar was determined by the angle formed between the intersected longitudinal axis of the second and third molars. The third molar was to be considered impacted according to its relationship to the anterior border of the ramus (Class 1, 2, 3) and occlusal surface in relation to the adjacent molar (level A, B, C). The data were analysed using a Pearson Chi-squared (X 2 ) test on SPSS version 24.0. Results: All selected radiographs showed the presence of impacted mandibular third molars. On overall comparison, the prevalence of mesioangular impaction was found to be the highest. The level A impactions were commonly seen in Chinese (74%), followed by Indians (11%) and Malays (8%). The class 1 impactions were commonly seen in Chinese (75%), followed by Indians (11.5%) and Malays (8.4%). Mesioangular were the most common impactions, followed by horizontal, vertical, and distoangular in all the races. Conclusion: The mesioangular impactions were found to be the most frequent occurrence among all the races, whereas differences were seen in levels of impaction to some extent among ethnic groups.
Lim et al. (2026) studied this question.