Aim: Determine eruption dates & sequence and to correlate between chronological and developmental age of eruption of primary and permanent teeth.
Methods: Study sample consisted of 1526 apparently healthy children of both sexes, 1020 children were selected from schools, and 506 children were selected from children attending Maternal and Child Welfare Centers.
Results: Eruption sequence in primary teeth in both sexes was: LA, UA, UB, LB, UD, LD, UC, LC, LE, and UE. Sequence of eruption of permanent teeth in boys was: L6, L1, L2, U1, U2, U6, L4, U4, U5, L3, L5, L7, upper permanent second molar U7 and U3. In girls: L1, L2, U1, U2, U6, L6, L3, L4, L5, U4, U5, L7, U7, and U3. In boys, deviation from the standard range exceeding 50% except for LA, UE, and LE. In girls, deviation was exceeding 50% in UC, UE, LA, LB, LC, LD, and LE. There were statistically significant difference between means age of eruption of permanent teeth in boys and girls for U1, U2, U5, U6, and L6.
Conclusion: Sequence and dates of eruption of teeth differ among populations. Orthodontists and pediatric dentists can rely on specific standards of Eruption dates & sequence for diagnosis, treatment planning, and preventive programs.