Evaluation of a novel dual-headed toothbrush design for periodontal health: split-mouth randomized blind clinical trial
Clinical Snapshot
PICO Framework
| P — Population | 37 dental professionals |
| I — Intervention | Dual-headed toothbrush |
| C — Comparator | Conventional single-headed toothbrush |
| O — Outcomes | Plaque index (PI), gingival index (GI), modified sulcus bleeding index (mSBI), brushing time, user satisfaction |
Bottom Line
This split-mouth RCT in 37 dental professionals suggests dual-headed toothbrushes may improve short-term periodontal outcomes and reduce brushing time compared to conventional brushes. However, the study has significant limitations including very small sample size, inability to blind participants, lack of confidence intervals, and questionable external validity to general patients. The exclusive use of dental professionals as participants severely limits generalisability, as this population likely has superior baseline oral hygiene knowledge and technique. While the split-mouth design effectively controls for individual variation, the short 4-week follow-up and absence of long-term safety data limit clinical confidence. The reported time efficiency (0.54 vs 0.99 minutes) and high user satisfaction (89.2% rating 'very easy') are promising but require validation in typical patient populations before clinical recommendations can be made.
Key Findings
P Value: Not specified
Effect Size: Not reported
Primary Outcome: Significant improvements in plaque index, gingival index, and modified sulcus bleeding index with dual-headed toothbrush at 2 weeks
Nnt Or Sensitivity: Not calculable from available data
Confidence Interval: Not reported
Clinical Application
High feasibility if dual-headed toothbrushes become commercially available Would require TGA approval for therapeutic claims; potential PBS listing unlikely for oral hygiene devices; relevant to RACGP preventive care guidelines Limited applicability to general population due to study in dental professionals
Abstract
BACKGROUND: Optimal oral health largely depends on the successful removal of plaque through effective brushing, but success typically relies on user technique, time, and adherence. The aim was to compare the effectiveness of a newly introduced dual-headed toothbrush with a conventional single-headed toothbrush in control of plaque and gingival health using a split-mouth design. METHODS: In the study, 37 dental professionals used two types of toothbrushes: a dual-headed toothbrush on one side of the mouth (Test side) and a conventional single-headed toothbrush on the other side (Control side). The study compared plaque removal, gingival status, and brushing time, assessing clinical outcomes using plaque index (PI), gingival index (GI), and modified sulcus bleeding index (mSBI) at baseline, 2 weeks, and 4 weeks. At the end, participants completed a Likert scale questionnaire. RESULTS: Both types of toothbrushes were effective in enhancing oral hygiene over time; however, dual-headed toothbrush group showed significant short-term reductions in plaque accumulation, gingival inflammation, and bleeding, particularly at the 2-week interval. A significant majority of participants (89.2%) rated dual-headed brush as "very easy" to use. Using a dual-headed toothbrush significantly reduces the brushing time (0.54 ± 0.17 vs. 0.99 ± 0.05 min for a conventional single-headed toothbrush), suggesting enhanced time efficiency. CONCLUSION: A dual-headed toothbrush would be more effective, faster, and easier to use than a single-headed brush. It would be a convenient alternative, especially for individuals with time constraints.
References
- 1.ElHaddad, S. A., Zahid, M. N., Dimashkieh, R. M., Demachkia, A. M., Al Khalifa, F. I., Ayami, R. A., ElShall, A. M., Kahil, N., Algohar, A., & Dimashkieh, M. R. (2026). Evaluation of a novel dual-headed toothbrush design for periodontal health: split-mouth randomized blind clinical trial. Clinical Oral Investigations. https://doi.org/10.3390/jcm11195557
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