Table 6.

Mean RMNPI scores at the week 1 and week 8 assessments

	Baseline (SD)*	Week 1			Week 8
		Adjusted mean (SE) change from pre-brushing baseline	Ratio vs. manual brush†	2-Sided P-value	Adjusted mean (SE) change from pre-brushing baseline	Ratio vs. manual brush†	2-Sided P-value
Whole mouth
Manual brush	0.616 (0.35)	0.046 (0.005)	–	<0.001	0.060 (0.004)	–
Novel O-R electric brush	0.620 (0.044)	0.104 (0.008)	2.26		0.152 (0.005)	2.53	<0.001
Whole-mouth proximal
Manual brush	1.000 (0.000)	0.071 (0.010)	–	<0.001	0.114 (0.013)	–
Novel O-R electric brush	1.000 (0.000)	0.185 (0.021)	2.61		0.364 (0.023)	3.19	<0.001
Whole-mouth gingival margin
Manual brush	1.000 (0.000)	0.011 (0.002)	–	0.002	0.008 (0.002)	–
Novel O-R electric brush	1.000 (0.000)	0.045 (0.010)	4.09		0.050 (0.005)	6.25	<0.001
Lingual surfaces
Whole mouth
Manual brush	0.620 (0.036)	0.022 (0.006)	–	<0.001	0.049 (0.004)	–
Novel O-R electric brush	0.618 (0.040)	0.072 (0.007)	3.27		0.129 (0.007)	2.63	<0.001
Proximal
Manual brush	1.000 (0.000)	0.024 (0.008)	–	<0.0001	0.081 (0.014)	–
Novel O-R electric brush	1.000 (0.000)	0.112 (0.019)	4.67		0.306 (0.027)	3.78	<0.001
Gingival margin
Manual brush	1.000 (0.000)	0.004 (0.002)	–	0.017	0.003 (0.002)	–
Novel O-R electric brush	1.000 (0.000)	0.019 (0.006)	4.75		0.034 (0.005)	11.33	<0.001
Molar surfaces
Whole mouth
Manual brush	0.648 (0.043)	0.039 (0.004)	--	<0.001	0.052 (0.004)	–
Novel O-R electric brush	0.651 (0.047)	0.077 (0.006)	1.97		0.099 (0.005)	1.90	<0.001
Proximal
Manual brush	1.000 (0.000)	0.002 (0.002)	–	0.005	0.022 (0.007)	–
Novel O-R electric brush	1.000 (0.000)	0.043 (0.014)	21.5		0.112 (0.018)	5.09	<0.001
Gingival margin
Manual brush	1.000 (0.000)	0	–	0.031	0	–
Novel O-R electric brush	1.000 (0.000)	0.010 (0.005)	>18		0.003 (0.001)	>18	0.004

^*Baseline plaque measures did not differ significantly (P > 0.320) between treatment groups.

^†Ratio = novel electric O-R brush/manual brush.