Chronological age versus corrected age of first tooth eruption in Jordanian premature infants

الملخص EN

Objective : To evaluate the chronological and corrected age and the impact of neonatal factors on first tooth eruption of Jordanian premature infants.

Methods : A prospective study of 110 Jordanian preterm infants (gestational age < 37 weeks and birth weight < 2500g) who were born and attended the neonatal follow up clinic at Prince Hashim Ben Al-Hussein Military Hospital, Zarqa / East of Jordan.

A first tooth eruption record including factors that might have an influence on teething were completed by the principal neonatologist and the parents of the enrolled infants, during the annual clinic visits.

Results : The study population consisted of 110 premature infants (50 males and 60 females) who were born at mean gestational age of 32.21 weeks + SD of 2.38 (Range was 28 to 37 weeks), mean chronological age 37.20 weeks + SD of 6.446 (Range was 24 to 48 weeks) and mean corrected age 29.45 weeks + SD of 5.55 (Range was 19 to 39 weeks) and mean birth weight 1551.82 grams + SD of 422.74 (Range was 850 to 2450 grams).

More normal eruption has been seen in subjects with birth weight (> 1500 grams) than (< 1500 gram) and gestational age (> 32 weeks) than (< 32 weeks).

There were great significant differences in birth weight and gestational age between normal and delayed groups when the chronological age rather than corrected age used (P < 0.05, Fisher's exact test).

Introduction of total parenteral nutrition, breast milk, and full term formula to premature infants associated with early first tooth eruption (P< 0.05, Fisher's exact test).

Conclusion : Introduction of total parenteral nutrition, breast milk, and preterm formula to premature infants associated with early first tooth eruption.

The significant difference between groups was mainly with chronological age rather than corrected age.