Table 2.

Residual plaque index values assessed using the Turesky et al.⁷ modification of the Quigley–Hein plaque index (TQHPI) at baseline and at the last tooth-brushing using Soft Elmex® toothbrushes with the same duration of brushing and the same toothpaste

Tooth surface		Minimum	Maximum	Mean	SD	P-value
Buccal surfaces
12	Baseline	0.0	4.0	1.1	1.0	< 0.01
	Last use	0.0	4.0	2.0	1.2
21	Baseline	0.0	2.0	0.4	0.8	< 0.01
	Last use	0.0	3.0	1.4	1.1
26	Baseline	0.0	2.0	0.5	0.8	< 0.01
	Last use	0.0	3.0	1.3	1.0
36	Baseline	0.0	2.0	0.4	0.8	< 0.01
	Last use	0.0	3.0	1.2	0.9
Lingual surfaces
16	Baseline	0.0	3.0	1.1	0.9	< 0.01
	Last use	0.0	3.0	1.7	0.9
46	Baseline	0.0	2.0	0.7	0.9	< 0.01
	Last use	0.0	4.0	1.3	0.9
Plaque index*
	Baseline	0.0	1.8	0.7	0.5	< 0.01
	Last use	0.2	2.7	1.5	0.5

SD, standard deviation.

^*Corresponds to the mean (total plaque index).