Table 1.

Individual participants mean tooth plaque scores with and without water additive treatment.

Mean tooth plaque scores
Participant number	No water additive	Water additive
1	10.11	7.50
2	8.50	7.67
3	7.72	7.39
4	7.33	7.22
5	8.28	7.61
6	8.67	7.28
7	5.78	8.89
8	ND	ND

ND — no data.