Related Experiment Video
Updated: May 20, 2026

Micro-dissection of Enamel Organ from Mandibular Incisor of Rats Exposed to Environmental Toxicants
Published on: March 29, 2018
Are low birth weight, intrauterine growth restriction, and preterm birth associated with enamel developmental
J R O Pinho1, F Lamy Filho, E B A F Thomaz
1Technical School's Health Care System, Postgraduation Program in Public Health, Federal University of Maranhão, São Luís, Maranhão, Brazil. judrafa@hotmail.com
Insights
Low birth weight and intrauterine growth restriction (IUGR) increase the risk of developmental defects of dental enamel (DDE) in children. Preterm birth was not significantly associated with DDE.
Area of Science:
- Pediatric Dentistry
- Neonatal Health
- Developmental Biology
Background:
- Developmental defects of dental enamel (DDE) can impact oral health.
- Low birth weight is a significant concern in neonatal care.
- Understanding risk factors for DDE is crucial for early intervention.
Purpose of the Study:
- To assess the association between low birth weight and its components (IUGR, preterm birth) with DDE.
- To identify specific risk factors contributing to enamel defects in early childhood.
Main Methods:
- Retrospective cohort study of 205 children aged 12-60 months.
- Clinical examination and analysis of medical records using the modified DDE index.
- Poisson regression analysis to determine relative risks (RR) and confidence intervals (CI).
Main Results:
- Intrauterine growth restriction (IUGR) was a significant risk factor for DDE (RR=5.19).
- Low birth weight was also associated with an increased risk of DDE (RR=3.44).
- Preterm birth showed no significant association with DDE in adjusted analyses.
Conclusions:
- Infants with low birth weight have a higher risk of developing DDE.
- IUGR appears to be a more significant contributor to DDE than preterm birth.
- These findings highlight the importance of monitoring children born with low birth weight for dental enamel issues.
Purpose:
The purpose of this study was to estimate the association between low birth weight and its 2 components, intrauterine growth restriction (IUGR) and preterm birth, with developmental defects of dental enamel (DDE).
Methods:
A retrospective cohort study was conducted on 205 12- to 60-month-olds born in the municipality of São Luís, Maranhão, Brazil. Clinical examination and interviews with the responsible persons were performed, and the medical records were analyzed. The modified DDE index was used for the diagnosis and classification of enamel defects. Poisson regression analysis was performed, and relative risk (RR) ratios (95% confidence interval, CI) were used for the estimation of associations.
Results:
Preterm birth was not associated with DDE in nonadjusted or adjusted analysis. In the crude models and after adjusting for confounding factors, IUGR (RR=5.19; CI=2.42-11.13) and low birth weight (RR=3.44; CI=1.72-7.37) continued to be risk factors for the occurrence of DDE.
Conclusions:
Low birth weight infants present a higher risk of developing enamel defects. This risk seems to be more related to the IUGR component than to the preterm birth component.
Related Concept Videos
Teeth
In the bud stage, the tooth germ (an aggregation of cells) starts to form in the developing jawbone. During the cap stage, the tooth germ differentiates into enamel organ, dental papilla, and dental sac, which will later develop into the tooth's enamel, dentin and...
Development of the Oral Microbiota
Teratogenicity
Tooth Anatomy
The Crown, Neck, and Root
The visible part of the tooth is referred to as the crown. It's covered by enamel, the hardest substance in the human body. The crown is uniquely shaped for each type of tooth, allowing for different functions such as cutting, tearing, or grinding food.
Bone Disorders
Bone deposition is also affected by the levels of sex hormones like estrogen and testosterone that promote osteoblast activity and bone matrix synthesis. When the level of these hormones decreases due to aging, it causes a reduction in bone deposition. As a result, bone resorption by osteoclasts...
Essential Minerals for Bone Health
Calcium and Phosphorus
Calcium is a critical component of bones, especially in the form of calcium phosphate and calcium carbonate. Since the body cannot make calcium, it must be obtained from the diet. However, calcium cannot be absorbed from the small intestine without...

