Result: The inferior alveolar nerve bundle contact the mandibular third molar accounted for the rate of 38, 9%. The inferior alveolar nerve bundle is at the lower position relative to the root of the mandibular third molar (contact and non-contact) accounting for the highest rate of 63%, the angle between the inferior alveolar nerve bundle and the root of the third molar is from 0 to 30 degrees, accounting for the highest rate of 33, 3% and the shortest distance from the neural tube to the root of the third molar > 3 mm accounted for the highest rate was 48.5%.