Table 4.

Plaque indices and plaque reduction percentages for buccal surface of the maxillary first molars

	STM system TBI	Conventional TBI	p valuea
Baseline	4.29 (0.78)	4.10 (1.09)	0.725
Immediately after TBI	2.19 (1.04)	2.71 (1.33)	0.142
1 week after TBI	3.19 (1.09)	3.12 (1.31)	0.970
1 month after TBI	2.76 (1.26)	3.07 (1.43)	0.432
Mean decrease	37.35%	30.07%

STM system smart toothbrush and smart mirror system, TBI toothbrushing instruction

^aMann-Whitney U test