Impact of Interdental Brushing on Pregnancy‐Associated Gingivitis: A Secondary Analysis of a Randomised Controlled Trial
Year: 2026
Type: article
Abstract: AIM: To assess whether daily use of calibrated interdental brushes can reduce gingival bleeding in pregnant women at high risk of preeclampsia. MATERIALS AND METHODS: In this multi-centre randomised controlled trial, 323 nulliparous women at risk of preeclampsia and with an intact periodontium were enrolled at 12 weeks of gestation. Participants were randomly allocated (1:1) to either: (i) the intervention group receiving individualised interdental hygiene instructions and calibrated interdental brushes for daily use, or (ii) the control group: receiving routine antenatal care. All participants were recalled at 1 week after baseline, 4, 5 and 8 months of pregnancy for assessments of bleeding on probing (BOP) and other periodontal indices. Linear mixed models were used to assess changes in bleeding over time, and logistic regression was used to evaluate predictors of bleeding resolution at the final follow-up. RESULTS: At 8 months of pregnancy, the intervention group showed a significant reduction in gingival bleeding, from 56% at baseline to 12% (-79.9%, p < 0.001), whereas the control group remained stable. Most of the improvement occurred during the first week (-56.8%). Among participants with severe baseline bleeding (> 81%), the reduction reached 84.3% (p < 0.05). Longitudinal analysis confirmed sustained reductions at each follow-up. Interdental brushing was the strongest independent predictor of bleeding reduction (OR = 3.14; 95% CI: 2.01-4.90). CONCLUSIONS: Daily use of calibrated interdental brushes, introduced early in pregnancy, significantly reduced gingival bleeding with rapid and sustained effects. These findings support the feasibility and clinical relevance of individualised interdental hygiene as a preventive strategy within standard antenatal oral health care. TRIAL REGISTRATION: ClinicalTrials.gov NCT04989075 (https://clinicaltrials.gov/study/NCT04989075).
DOI: 10.1111/jcpe.70085
Institutions: Lyon 1 Université, Parcours santé systémique, Ministère de la Santé Publique et Action Sociale, Cheikh Anta Diop University, Sapienza University of Rome, Hospices Civils de Lyon, Marche Polytechnic University, Koszalin University of Technology, Université de Tours, Éducation Éthique Santé, Centre National de la Recherche Scientifique, Aix-Marseille Université, Anthropologie Bio-Culturelle, Droit, Éthique & Santé
Language: English
Subfield: Periodontics
Field: Dentistry
Domain: Health Sciences
Open Access status: hybrid
Estimated APC paid: $5,510
OpenAlex ID: W7125187076