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Associated Topics

Inconclusive evidence of the effects of orthodontic therapy on periodontal health

Robbie Henwood DDS, PhD, MAGD; Mina Chung DDS, MS .


Systematic Review Conclusion

The association between orthodontic therapy and improved periodontal health cannot be verified. However, limited evidence suggests a slight worsening of periodontal health after orthodontic therapy.

Critical Summary Assessment

On the basis of evidence from only 12 studies with substantial risk of bias, there is an absence of reliable evidence supporting the positive effects of orthodontic therapy on patients’ periodontal status.

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