Stages 0 : Absence of crypt 1 : Presence of crypt 2 : Initial calcification of crown 3 : 1/3rd calcification of crown – completed 4 : 2/3rd of crown completed 5 : Crown almost completed 6 : Complete calcification of crown. Tooth shows eruptive movement 7 : 1/3rd of root completed 8 : 2/3rd of Root completed 9 : Root almost completed with open apex 10 : Apical end of Root completed