1G.D. Slade1*, A.E. Sanders1,

Systematic reviews produce conflicting conclusions regarding dental caries-preventive effects of water fluori-dation in adults. The authors investigated the relationship using data from the nationally representative 2004−2006 Australian National Survey of Adult Oral Health. Effects were compared between the pre-fluoridation cohort born before 1960 (n = 2,270) and the cohort born between 1960 and 1990 (n = 1,509), when widespread implementation of fluoridation increased population coverage from < 1% to 67%. Residential history questionnaires determined the percentage of each person’s lifetime exposed to fluori-dated water. Examiners recorded decayed, missing, and filled teeth (DMF-Teeth) and decayed and filled tooth surfaces (DF-Surfaces). Socio-demographic and preven