Skip to main content
Toggle Menu of ADA WebSites
ADA Websites
Partnerships and Commissions
Toggle Search Area
Toggle Menu
e-mail Print Share

Insufficient evidence to determine an association between dental crowding and caries

Anthony Jackson DDS .


Systematic Review Conclusion

The possible association between dental crowding and caries remains unresolved owing to a lack of appropriately designed, higher-quality studies.

Critical Summary Assessment

The authors of this systematic review found limited cross-sectional evidence with respect to the relationship between crowding and caries. Randomized controlled trials or longitudinal studies that take into account more dental health parameters than those in the included studies—such as presence or development of malocclusions (included in indexes of orthodontic treatment need), age, sex, baseline oral health status and quality of home care—are required to answer the question of whether crowding and caries are associated.

Evidence Quality Rating

Limited Evidence

This summary is published in the Journal of the American Dental Association and can be accessed at:

Critical Summary Publication Date:


These summaries are not intended to, and do not, express, imply, or summarize standards of care, but rather provide a concise reference for dentists to aid in understanding and applying evidence from the referenced systematic review in making clinically sound decisions as guided by their clinical judgment and by patient needs. American Dental Association © 2019