hearing loss was more prevalent and severe in 19 children with enamel defects of the incisal tooth edge ( mean = 61 db ) reflecting a systemic insult at 14 to 16 weeks gestation , than in 7 children with cervical third tooth defects ( mean = 23 db ) reflecting insult near term ( x2 = 4.08 ; p less than 0.05 ) .
C2986583
of
C0040426
tooth