Dental age can be determined through two methods - stage of eruption and stage of tooth mineralization on radiograph. The stage of eruption method is limited during quiescent eruption periods, while the stage of mineralization method relies on comparing the development of individual teeth to a fixed scale. This second method uses a point system to assess development and calculate a total that correlates to a dental age. It is considered sufficiently accurate when examining teeth 1-7 on the left lower quadrant.