Related Experiment Video
Updated: Apr 14, 2026

Midface Hypoplasia and Cranial Base Morphology in Syndromic Craniosynostosis: A Comparative Analysis Study Using a Predictive Regression Model
Published on: November 4, 2025
Stomatognathic evaluation at five years of age in children born premature and at term
Kíldane Maria Almeida Guedes1,2, Alzira Maria D'Avila Nery Guimarães3, Alliny de Souza Bastos4
1Graduate School of Health Sciences, Federal University of Sergipe, Aracaju, Brazil. kildaneguedes@hotmail.com.
Insights
Premature birth increases the risk of stomatognathic system disorders, including malocclusion and enamel hypoplasia. Mechanical ventilation and not breastfeeding are significant contributing factors to these developmental issues in preterm infants.
Area of Science:
- Pediatric Dentistry
- Neonatology
- Developmental Biology
Background:
- Prematurity is a significant risk factor for stomatognathic system alterations.
- Preterm birth affects 6-11% of births and is linked to various maternal and infant health factors.
- Enamel defects and skeletal structure changes are associated with prematurity.
Purpose of the Study:
- To investigate changes in the stomatognathic system at five years of age in children born prematurely.
- To identify risk factors associated with developmental disorders in the stomatognathic system of preterm infants.
Main Methods:
- A comparative study evaluating the prevalence of stomatognathic system developmental disorders in preterm (n=32) versus term-born (n=381) children at five years of age.
- Data collection included clinical examinations, questionnaires, and review of medical records for gestational age, birth weight, head circumference, Apgar score, and mechanical ventilation.
- Preterm birth (<37 weeks gestational age) was the primary explanatory variable.
Main Results:
- Preterm infants exhibited higher rates of atresic palate (40.6%), malocclusion (56.2%), and enamel hypoplasia (21.8%).
- Children not breastfed had a higher incidence of malocclusion (65.0%).
- Preterm infants showed significantly higher rates of head circumference changes (5x) and mechanical ventilation use (3x) at birth.
Conclusions:
- Mechanical ventilation at birth is a direct contributor to stomatognathic system developmental disorders, particularly dental hypoplasia, in preterm infants.
- Lack of breastfeeding increases the risk of malocclusion.
- Head circumference alterations are linked to dental malocclusion, underscoring the impact of prematurity on stomatognathic system development and the need for preventive strategies.
Background:
The high frequency of alterations of the stomatognathic system associated with premature birth may suggest that prematurity is an important risk factor in the development of this system. Prematurity has an incidence between 6-11% of births and is associated with factors such as genetic, maternal conditions (obstetric problems, nutritional status, infections) and antenatal care. In addition, undesirable situations, such as changes in enamel and the development of the skeletal structure, also appears to be associated with prematurity. This study aimed to look for changes in the stomatognathic system at five years of age associated with premature birth.
Methods:
We estimated the prevalence of developmental disorders of the stomatognathic system in the primary dentition of preschool children at five years of age. Changes in preterm infants (n = 32) compared with term born (n = 381) were evaluated . Clinical examinations and questionnaire with sociodemographic and health of mothers and children information. Gestational age, birth weight, head circumference, Apgar score and mechanical ventilation, were collected from the medical records to birth records. The explanatory variable was preterm (<37 weeks gestational age).
Results:
Prevalence of 7.7% of preterm infants was found. Of these, 40.6% had atresic palate, 56.2% malocclusion and 21.8% enamel hypoplasia. Forty (9.6%) children were not breastfed at the breast, and 26 (65.0%) had some type of malocclusion, showing association between not breastfeeding with an abnormal development of the stomatognathic system. The group of preterm infants showed five times more changes in head circumference and three times more mechanical ventilation use at birth. Change in head circumference at birth and mechanical ventilation has a significant association between groups of preterm and term infants.
Conclusions:
Mechanical ventilation at birth directly contributed to an increased risk of developmental disorders of the stomatognathic system in preterm infants, especially dental hypoplasia. Non-breastfed children had a higher risk of developing malocclusion. Alterations in head circumference were related effective on dental malocclusion. The results suggest that changes in the stomatognathic system are influenced by premature birth and points to the imperative need of using methods of preventive.
Related Concept Videos
Assessment of the Mouth
Mouth Inspection
The inspection begins with visually examining the mouth for symmetry, color, and size.
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...
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...
Development of the Oral Microbiota
Assessment of Airway, Skin Color, and Use of Accessory Muscles
Introduction
The initial evaluation of a patient's respiratory system...

