Behaviour change intervention for periodontal disease

Fraser Macdonald, Dental Tribune International

Wed. 11. March 2026

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MANCHESTER, England: Many dental professionals use behavioural techniques alongside routine oral hygiene advice to help patients improve their brushing and interdental cleaning habits. A new Cochrane systematic review has assessed whether such behavioural approaches offer additional clinical benefit compared with usual advice alone in adults with periodontal disease. The findings highlight current uncertainties and call for more rigorous research to determine the true effectiveness of behaviour change strategies in periodontal care.

The review synthesised evidence from 25 studies involving 1,422 participants. Outcomes assessed included clinical measures such as bleeding on probing, inflammation, plaque accumulation and pocket depth, as well as self-reported oral hygiene behaviour.

For adults with periodontitis, the review found no clear evidence that behavioural approaches provided additional benefits over usual advice in reducing bleeding, inflammation, plaque or pocket depth. Likewise, there was no reliable evidence that behavioural strategies led to greater improvements in self-reported oral hygiene habits. Similar uncertainty applied to adults with gingivitis. None of the studies reported effects on attachment to bone or any potential harms linked to behavioural interventions.

However, the review’s evidence was judged to be of very low certainty because of small sample sizes and methodological limitations, among other reasons. Speaking to Dental Tribune International on the main findings of the study, lead author Dr Lucy O’Malley, senior lecturer in applied health science in the University of Manchester’s Division of Dentistry, stated: “The trials varied widely in terms of intervention design and methods, and the certainty of the evidence was judged to be very low. As a result, we cannot conclude that these additional behavioural interventions are effective overall.”

On the clinical relevance of the study, Dr O’Malley explained: “These results do not mean the interventions do not or cannot work; rather, the current evidence base is insufficient to determine their impact. It is also important to note that most interventions were compared with an active control—standard care provided by dental health practitioners, which itself involves behavioural support. There is a need for further high-quality theory driven research in this area.”

At present, there is insufficient high-quality evidence to recommend specific behavioural approaches as reliably more effective than usual oral hygiene advice in improving clinical outcomes for adults with periodontal disease, according to the researchers. The review highlights a clear need for well-designed and well-reported randomised trials on behaviour change interventions based on techniques that have a clear mechanism of action for change and that measure standardised outcomes in larger sample sizes over longer follow-up periods.

The study, titled “Behavioural interventions for improving oral hygiene in adults with periodontal diseases”, was published online on 28 January 2026 in the Cochrane Database of Systematic Reviews.