Objective: This study aimed to evaluate the reproducibility of the radiographically determined anatomical parameters related to the lower third molar (L3M) by analyzing the results of examiners agreement degree.Study Design: An observational study of 50 L3M was made from twentyfive digital panoramic radiographs, which analyzed by four examiner groups (oral and maxillofacial surgeons, dental specialists, general dental practitioners (GDP), and post-rotation dentists) through the evaluation of the position and angulation of L3M along with the root forms and their relation to the inferior dental nerve (IDN). Intra and interexaminer agreement were determined by descriptive analysis and variance test.Results: Only evaluation of tooth angulation showed both intra and inter-group agreement among examiners (82.3%, P= 0.128), whereas mean agreement about tooth position was 80.7% for intragroup analysis with statistical significant difference to position variable in intergroup analysis.Root form and tooth-IDN relation variables revealed lowest intragroup mean of agreement with lack of inter-group reproducibility with greater disagreement to the GDP and specialist group (P< .05).
Conclusion:The intra and interexaminer reproducibility of subjective L3M evaluation was only associated to tooth angulation. These results suggest the need for using an objective measurement method to minimize the error introduced by observer interpretation.