<prompt> Age of eruption of Permanent 1st molar6 years8 years10 years12 years  <response>: Ans. is a- i.e., 6 years Eruption of temporary teeth Primary dentition Tooth Age in range months Average age months Lower Cl Upper Cl UpplerLI Lower LI I molar Canine II molar 6-8 7-9 7-9 10-12 12-14 17-18 20-30 7 8 8 11 13 17?5 25 Eruption of permanent teeth Secondary dentition Age in range years Average age years First Molar Central incisor Lateral incisor First PM Second PM Canine Second Molar Third molar 6-7 7-8 8-9 9-11 10-12 11-12 12-14 17-25 6?5 7 8 10 11 11 5 13 17 