Table 2.

Oral Hygiene: Plaque, Gingiva, and Dentures

	Plaque Index (0–3)a n=391			Gingival Index (0–4)b n=390
	Buccal (Outside) Surface	Lingual (Inside) Surface		Buccal (Outside) Surface	Lingual (Inside) Surface
	Mean (SD)	Mean (SD)	p	Mean (SD)	Mean (SD)	p
Upper teeth	1.7 (0.8)	1.3 (0.8)	<.001	1.6 (1.0)	1.2 (0.9)	<.001
Lower teeth	1.8 (0.8)	1.8 (0.8)	.95	1.7 (0.9)	1.6 (0.9)	<.001
Overall scores	1.8 (0.8)	1.6 (0.8)	<.001	1.7 (0.9)	1.4 (0.8)	<.001
	1.7 (0.8)			1.5 (0.9)
		Upper Denture (0–4)c n=168		Lower Denture (0–4)c n = 107
		Mean (SD)		Mean (SD)		p
Facial, exposed surface		2.2 (1.3)		1.9 (1.3)		.020
Basal, unexposed surface		2.4 (1.3)		2.1 (1.3)		.12
Overall scores		2.3 (1.2)		2.0 (1.3)		.016
		2.2 (1.2)

^a0=no plaque; 1=plaque covers ≤ 1/3 of tooth surface or presence of extrinsic strains; 2=plaque covers > 1/3 but ≤ 2/3 of tooth surface; 3=plaque covers > 2/3 of tooth surface; n=404

^b0=no inflammation; 1=mild inflammation with slight change in color, little change in texture but not of the entire margin; 2=mild inflammation with slight change in color, little change in texture of the entire margin; 3=moderate inflammation with glazing, redness, edema, and/or hypertrophy with bleeding on pressure; 4=severe inflammation with marked redness, edema, and/or hypertrophy with spontaneous bleeding, congestion, or ulceration; n=401 due to missing data

^c0=no plaque; 1=light plaque covering up to 25% of area; 2=moderate plaque covering 26–50% of area; 3=heavy plaque covering 51–75% of area; 4=very heavy plaque covering 76–100% of area;