Measuring the short-term impact of fluoridation cessation on dental caries in Grade 2 children using tooth surface indices
Version of Record online: 17 FEB 2016
© 2016 The Authors. Community Dentistry and Oral Epidemiology Published by John Wiley & Sons Ltd
This is an open access article under the terms of the Creative Commons Attribution-NonCommercial-NoDerivs License, which permits use and distribution in any medium, provided the original work is properly cited, the use is non-commercial and no modifications or adaptations are made.
Community Dentistry and Oral Epidemiology
Volume 44, Issue 3, pages 274–282, June 2016
How to Cite
Measuring the short-term impact of fluoridation cessation on dental caries in Grade 2 children using tooth surface indices. Community Dent Oral Epidemiol 2016; 44: 274–282. © 2016 The Authors. Community Dentistry and Oral Epidemiology Published by John Wiley & Sons Ltd., , , , , , .
- Issue online: 14 APR 2016
- Version of Record online: 17 FEB 2016
- Manuscript Accepted: 9 JAN 2016
- Manuscript Received: 6 JUL 2015
- Canadian Institutes of Health Research. Grant Number: GIR 127083
- Alberta Health
- Alberta Health Services
- Public Health Agency of Canada
- Alberta Innovates – Health Solutions
- Public health
To examine the short-term impact of fluoridation cessation on children's caries experience measured by tooth surfaces. If there is an adverse short-term effect of cessation, it should be apparent when we focus on smooth tooth surfaces, where fluoride is most likely to have an impact for the age group and time frame considered in this study.
We examined data from population-based samples of school children (Grade 2) in two similar cities in the province of Alberta, Canada: Calgary, where cessation occurred in May 2011 and Edmonton where fluoridation remains in place. We analysed change over time (2004/2005 to 2013/2014) in summary data for primary (defs) and permanent (DMFS) teeth for Calgary and Edmonton, for all tooth surfaces and smooth surfaces only. We also considered, for 2013/2014 only, the exposed subsample defined as lifelong residents who reported usually drinking tap water.
We observed, across the full sample, an increase in primary tooth decay (mean defs – all surfaces and smooth surfaces) in both cities, but the magnitude of the increase was greater in Calgary (F-cessation) than in Edmonton (F-continued). For permanent tooth decay, when focusing on smooth surfaces among those affected (those with DMFS>0), we observed a non-significant trend towards an increase in Calgary (F-cessation) that was not apparent in Edmonton (F-continued).
Trends observed for primary teeth were consistent with an adverse effect of fluoridation cessation on children's tooth decay, 2.5–3 years post-cessation. Trends for permanent teeth hinted at early indication of an adverse effect. It is important that future data collection efforts in the two cities be undertaken, to permit continued monitoring of these trends.