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Fig. 5 | BMC Oral Health

Fig. 5

From: Effects of blue-light LED toothbrush on reducing dental plaque and gingival inflammation in orthodontic patients with fixed appliances: a crossover randomized controlled trial

Fig. 5

Effect of the LED toothbrush on Streptococcus mutans biofilm: (A) Colony forming Units, (B) The comparison of percentage of bacterial viability. The group with 15-, 30-, 60-, and 120-sec exposure had a significantly lower percentage of bacterial viability than the negative control group (no LED) (P < 0.05). Asterisks indicate a significant difference compared with no LED group. No significant difference was detected between the exposure time points

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