Plaque removal by young children using old and new toothbrushes

Area of Science:

• Pediatric Dentistry
• Oral Hygiene Research
• Clinical Trials

Background:

• Limited evidence exists regarding the impact of toothbrush wear on plaque removal efficacy.
• Understanding toothbrush lifespan is crucial for maintaining optimal oral hygiene practices.

Purpose of the Study:

• To evaluate the non-inferiority of plaque removal by old versus new toothbrushes in children.
• To provide evidence-based recommendations for toothbrush replacement intervals.

Main Methods:

• A randomized cross-over clinical trial involving 101 children aged 7-8 years.
• Children used either a 14-month-old or a new toothbrush in two separate sessions.
• Plaque scores were measured using the Quigley-Hein index before and after brushing.

Main Results:

• The plaque score reduction was 10.9% greater with new toothbrushes compared to old ones (p<0.001).
• The confidence interval for the difference (7.6%-13.9%) fell within the pre-defined non-inferiority margin of <15%.
• The study validated the non-inferiority of old toothbrushes in plaque removal for this age group.

Conclusions:

• Toothbrushes aged 14 months demonstrated comparable plaque removal efficacy to new ones in 7- and 8-year-old children.
• The findings suggest that children may not need to replace toothbrushes as frequently as commonly recommended.
• This research contributes to optimizing oral hygiene strategies and potentially reducing dental care costs.