| | Stage description | Attainment |
| Stage D. When (1) the crown formation is complete down to the cementoenamel junction; (2) the superior border of the pulp chamber in the single-root teeth has a definite curved form, with it being concave towards the cervical region; the projection of the pulp horns, if present, gives an outline shaped like the top of an
umbrella and (3) the beginning of root formation is seen in the form of a spicule | Canine, premolars, and second molar before the pubertal growth spurt [28, 57, 110, 112] |
| | Stage E. When (1) the walls of the pulp chamber form straight lines, the continuity of which is broken by the presence of the pulp horn, which is larger than in the previous stage and (2) the root length is less than the crown height | Mostly, canine and first premolar before the pubertal growth spurt [28, 57, 110, 112] |
| | Stage F. When (1) the walls of the pulp chamber form a more or less isosceles triangle, with the apex ending in a funnel shape and (2) the root length is equal to or greater than the crown height | Sometimes, canine before the pubertal growth spurt [28, 57, 112] |
| | Stage G. When the walls of the root canal are parallel and its apical end is still partially open | Canine, premolars, and second molar before, during, and after the pubertal growth spurt [28, 57, 110, 112] |
| | Stage H. When (1) the apical end of the root canal is completely closed and (2) the periodontal membrane has a uniform width around the root and the apex | Second molar after the pubertal growth spurt [28, 57, 112] |
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