Table 1. Descriptive data of dentin loss (μm).

Design of toothbrush	Toothbrush	Manufacturer	Stroke number	Mean	Standard deviation	95% confidence interval
• Sonic	Sonicare PowerUp	Philips GmbH	2610	21.03	1.26	20.41–21.66
• Oscillating-rotating	Oral B Vitality Precisions Clean	Procter & Gamble	2610	15.28	0.85	15.28–16.13
• ManualFlat-trim	Dr. Best Original	Glaxo-Smith-Kline	31200	6.13	1.24	5.51–6.75
• ManualRipple-shaped	Blend-a-Dent Complete V-Interdental	Blend-a-med	31200	2.50	0.43	2.28–2.71