Relationship between Duration of Fluoride Exposure in School-Based Fluoride Mouthrinsing and Effects on Prevention and Control of Dental Caries

Table 1

Caries prevalence of 12-year-old children in two groups.

S-FMR experience in elementary school						Teeth				Tooth surfaces
	Gender	Number	Mean number of erupted teeth	Mean number of erupted tooth surfaces	DMF person rate (%)	Mean DT	Mean MT	Mean FT	DMFT index*	Mean DT	Mean MT	Mean FT	DMFS index**
	Boys	319	25.2	114.3	44.5	0.08	0.00	1.18	1.27	0.18	0.00	1.98	2.16
F+	Girls	280	26.0	117.8	47.9	0.09	0.01	1.20	1.30	0.16	0.04	1.85	2.05
	Subtotal	599	25.6	116.0	46.1	0.09	0.00	1.19	1.28	0.17	0.02	1.92	2.05
	Boys	147	24.9	111.0	58.5	0.20	0.00	1.56	1.76	0.35	0.00	2.73	3.09
F−	Girls	135	25.8	116.4	71.9	0.27	0.00	2.04	2.31	0.53	0.00	3.82	4.36
	Subtotal	282	25.3	113.6	64.9	0.23	0.00	1.79	2.02	0.44	0.00	3.26	3.69
	Total	881	25.5	115.2	52.1	0.13	0.00	1.38	1.52	0.26	0.01	2.35	2.62
	Boys	—			46.5	—	—	—	1.30	—	—	—	—
Prefectural mean (2006)^†	Girls	—			49.9	—	—	—	1.50	—	—	—	—
	Subtotal	—			48.1	—	—	—	1.40	—	—	—	—
	Boys	—			—	0.57	0.02	0.98	1.57	—	—	—	—
Nationwide mean (2006)^‡	Girls	—			—	0.63	0.03	1.18	1.85	—	—	—	—
	Subtotal	—			—	0.60	0.03	1.08	1.71	—	—	—	—

*Average number of permanent teeth with dental caries (DT, MT, and FT).
**Average number of permanent tooth surfaces with dental caries (DS, MS, and FS).
^†Results from Prefectural Survey on School Health Statistics (2006).
^‡Results from National Survey on School Health Statistics by Ministry of Education, Culture, Sports, Science and Technology, Japan (2006).