| Table 1: Results of studies of dental fluorosis prevalence in areas with optimally fluoridated water* | ||||||
|---|---|---|---|---|---|---|
| Type of case; prevalence, % | ||||||
| Study and year of examination | Age, yr | Fluoride intake period | None | Very mild/mild | Moderate/severe | Total |
| Driscoll et al, 1980[20] | 8-16 | 1964-78 | 84.5 | 15.5 | 0.0 | 15.5 |
| Heifetz et al, 1980[21] | 8-10 13-15 | 1970-78 1965-73 | 81.1 88.6 | 18.7 11.4 | 0.1 0.0 | 18.8 11.4 |
| Leverett, 1981[22] | 7-17 | 1964-80 | 73.1 | --+ | --+ | 26.9 |
| Segreto et al, 1984[23] | 7-18 | 1962-78 | 39.6 | 60.1 | 0.3 | 60.4 |
| Heifetz et al, 1985[21] | 8-10 13-15 | 1975-83 1970-78 | 72.0 70.7 | 28.0 29.3 | 0.1 0.0 | 28.1 29.3 |
| Spunar and Burt, 1986[24] | 6-12 | 1974-84 | 51.0 | 49.0 | 0.0 | 49.0 |
| Williams and Zwemer, 1988[25] | 12-14 | 1974-82 | 19.1 | 66.9 | 14.0 | 80.9 |
| Ismail et al, 1991[26] | 10-12 | 1979-87 | 31.8 | --+ | --+ | 69.2 |
| Clark et al, 1991[27] | 6-14 | 1977-91 | 35.0 | 55.0 | 10.0 | 65.0 |
|
*Adapted from Clark.[1]
+Cases were not classified according to severity. | ||||||