Accuracy of the third molar index cut-off value for estimating 18 years of age: Validation in a Japanese samples.

Aims: To evaluate the cut-off value of third molar maturity index (I) = 0.08 for discriminating minors from adults in Japanese population.

Material And Methods: 276 panoramic radiographs of healthy Japanese subjects (139 girls and 137 boys) age range from 14 to 24 years were evaluated.