Breastfeeding is widely recognized as the optimal form of infant nutrition, providing significant systemic, immunological, and developmental benefits.
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This review examines the current scientific evidence, distinguishing established facts from common myths, and provides evidence-based recommendations for clinicians and caregivers.
✅ Introduction
Breastfeeding is recommended exclusively for the first six months of life and continued alongside complementary feeding thereafter. Beyond its nutritional value, breastfeeding plays an important role in the development of the stomatognathic system, influencing oral functions such as sucking, swallowing, breathing, and craniofacial growth.
Despite these recognized benefits, concerns persist regarding its potential association with early childhood caries (ECC), prolonged nocturnal feeding, and malocclusion development. Understanding the available scientific evidence is essential for delivering accurate preventive guidance and avoiding misconceptions that may discourage breastfeeding.
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Craniofacial Growth and Functional Development
Breastfeeding requires coordinated activity of the lips, tongue, cheeks, and masticatory muscles. This physiological process promotes harmonious growth of the maxilla and mandible while supporting proper neuromuscular development.
Research suggests that breastfed infants demonstrate:
▪️ Improved development of oral musculature.
▪️ Enhanced mandibular advancement during feeding.
▪️ Better establishment of nasal breathing patterns.
▪️ Reduced prevalence of certain malocclusions compared with bottle-fed infants.
The biomechanical demands of breastfeeding differ significantly from bottle feeding, resulting in greater stimulation of the craniofacial complex.
Development of Oral Functions
Breastfeeding contributes to the maturation of essential oral functions, including:
▪️ Sucking.
▪️ Swallowing.
▪️ Breathing coordination.
▪️ Future mastication efficiency.
These functions are critical for the healthy development of the oral cavity and facial structures.
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Myth 1: Breastfeeding Always Causes Dental Caries
Fact: Current evidence does not support the notion that breastfeeding alone causes dental caries.
Dental caries is a multifactorial disease influenced by:
▪️ Cariogenic bacterial biofilm.
▪️ Frequent exposure to fermentable carbohydrates.
▪️ Inadequate oral hygiene.
▪️ Host susceptibility factors.
Human milk contains lactose, but it also possesses protective components such as immunoglobulins, lactoferrin, and antimicrobial proteins. Consequently, breastfeeding itself should not be considered an independent cause of ECC.
Myth 2: Nighttime Breastfeeding Inevitably Leads to Cavities
Fact: The relationship is more complex than commonly believed.
Some studies have reported an increased risk of ECC when breastfeeding continues frequently during the night beyond 12 months in conjunction with poor oral hygiene and sugary dietary exposure. However, breastfeeding alone is insufficient to explain disease development.
The primary determinants remain plaque control, fluoride exposure, and dietary habits.
Myth 3: Bottle Feeding and Breastfeeding Have the Same Effect on Oral Development
Fact: Feeding methods differ substantially in their biomechanical effects.
Breastfeeding requires greater muscular effort and promotes physiological tongue posture, while bottle feeding generally involves reduced muscular activity.
Evidence indicates that breastfeeding may contribute to healthier craniofacial development and lower prevalence of certain occlusal abnormalities.
Myth 4: Extended Breastfeeding Causes Malocclusion
Fact: Available evidence does not consistently support this claim.
Several studies suggest that breastfeeding may actually reduce the risk of non-nutritive sucking habits, including thumb sucking and prolonged pacifier use, both of which are strongly associated with malocclusion development.
The etiology of malocclusion is multifactorial and includes genetic, environmental, and behavioral influences.
Myth 5: Breastfed Children Do Not Need Early Oral Hygiene
Fact: Oral hygiene should begin early regardless of feeding method.
Professional recommendations include:
▪️ Cleaning the oral cavity before tooth eruption.
▪️ Initiating tooth brushing as soon as the first tooth appears.
▪️ Using age-appropriate fluoride toothpaste.
▪️ Scheduling an early dental visit during infancy.
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Protective Factors
Several mechanisms may contribute to oral health benefits associated with breastfeeding:
▪️ Presence of antimicrobial agents.
▪️ Immunological protection against pathogens.
▪️ Reduced exposure to added sugars during infancy.
▪️ Promotion of healthy oral microbial development.
Potential Risk Factors
Certain conditions may increase ECC risk:
▪️ Frequent nocturnal breastfeeding after tooth eruption.
▪️ Lack of oral hygiene.
▪️ High consumption of sugary foods and beverages.
▪️ Irregular preventive dental care.
Importantly, these factors act synergistically and should not be interpreted as evidence that breastfeeding itself is harmful.
💬 Discussion
The scientific literature demonstrates that breastfeeding provides substantial benefits for oral and craniofacial development, while concerns regarding caries should be interpreted within the broader context of disease multifactoriality.
Although some epidemiological studies have identified associations between prolonged breastfeeding and ECC, causality remains difficult to establish because dietary practices, socioeconomic conditions, oral hygiene behaviors, and fluoride exposure frequently act as confounding variables.
Current evidence supports a balanced interpretation: breastfeeding should be encouraged according to established pediatric recommendations, while preventive oral health measures should be implemented from infancy. The focus should remain on comprehensive caries prevention rather than restricting breastfeeding without clear clinical justification.
🎯 Clinical Recommendations
For Parents and Caregivers
1. Continue breastfeeding according to pediatric and maternal preferences.
2. Begin oral hygiene practices early.
3. Brush erupted teeth twice daily using fluoride toothpaste.
4. Limit exposure to sugary foods and beverages.
5. Schedule the first dental visit by the child's first birthday.
6. Maintain regular preventive dental examinations.
For Dental Professionals
1. Promote evidence-based breastfeeding counseling.
2. Assess individual caries risk factors comprehensively.
3. Educate families regarding infant oral hygiene.
4. Avoid unsupported recommendations that discourage breastfeeding.
5. Integrate dietary counseling into preventive care programs.
✍️ Conclusion
Breastfeeding remains one of the most beneficial practices for infant health and contributes positively to oral and craniofacial development. Current scientific evidence does not support the misconception that breastfeeding alone causes dental caries or malocclusion. Instead, oral diseases arise from complex interactions involving microbial, behavioral, dietary, and environmental factors. An evidence-based approach that combines breastfeeding promotion, fluoride use, oral hygiene, and regular dental care represents the most effective strategy for maintaining optimal oral health during early childhood.
📚 References
✔ American Academy of Pediatric Dentistry. (2024). Policy on dietary recommendations for infants, children, and adolescents. The Reference Manual of Pediatric Dentistry, 88–92.
✔ Peres, K. G., Cascaes, A. M., Nascimento, G. G., & Victora, C. G. (2015). Effect of breastfeeding on malocclusions: A systematic review and meta-analysis. Acta Paediatrica, 104(467), 54–61. https://doi.org/10.1111/apa.13103
✔ Tham, R., Bowatte, G., Dharmage, S. C., Tan, D. J., Lau, M. X., Dai, X., Allen, K. J., & Lodge, C. J. (2015). Breastfeeding and the risk of dental caries: A systematic review and meta-analysis. Acta Paediatrica, 104(467), 62–84. https://doi.org/10.1111/apa.13118
✔ Victora, C. G., Bahl, R., Barros, A. J. D., França, G. V. A., Horton, S., Krasevec, J., Murch, S., Sankar, M. J., Walker, N., & Rollins, N. C. (2016). Breastfeeding in the 21st century: Epidemiology, mechanisms, and lifelong effect. The Lancet, 387(10017), 475–490. https://doi.org/10.1016/S0140-6736(15)01024-7
✔ World Health Organization. (2023). Infant and young child feeding. Geneva, Switzerland: World Health Organization.
✔ Peres, K. G., Chaffee, B. W., Feldens, C. A., Flores-Mir, C., Moynihan, P., Rugg-Gunn, A., & Peres, M. A. (2018). Breastfeeding and oral health: Evidence and methodological challenges. Journal of Dental Research, 97(3), 251–258. https://doi.org/10.1177/0022034517738925
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