deciduous teeth ( 51 ) were tested in 17 children ( 3.7 +/- 0.5 yr ) and a total of 531 permanent teeth in two other groups of subjects : older children with an average age of 12.4 +/- 1.9 yr and adults with an age of 44.7 +/- 11.7 yr .
C0008059
children
C1455726
older children