<prompt> A 6 months old child does not have any tooth in mouth. Normally by what maximum age first tooth should erupt.10 to 11 months6 to 8 months14 to 16 monthsAll of the above  <response>: In primary dentition the variation of eruption has a range of 4-5 months, Since first tooth erupts at an age of 6 months then a variation of 4-5 months can be considered normal. 