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Vol. 36, No. 5, 2002
Issue release date: September–October 2002
Section title: Original Paper
Caries Res 2002;36:308–314
(DOI:10.1159/000065960)

Caries Occurrence in a Fluoridated and a Nonfluoridated Town in Finland: A Retrospective Study Using Longitudinal Data from Public Dental Records

Seppä L. · Hausen H. · Kärkkäinen S. · Larmas M.
Institute of Dentistry, University of Oulu, Finland

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Article / Publication Details

First-Page Preview
Abstract of Original Paper

Received: 8/20/2001
Accepted: 6/26/2002
Published online: 10/23/2002

Number of Print Pages: 7
Number of Figures: 4
Number of Tables: 1

ISSN: 0008-6568 (Print)
eISSN: 1421-976X (Online)

For additional information: http://www.karger.com/CRE

Abstract

The tap water of Kuopio, Finland, was fluoridated from 1959 to1992. In the first decade of fluoridation, children in Kuopio had lower DMF values than children in Jyväskylä, a nearby low-fluoride town, but later differences between the towns have been small and inconsistent. The present study aimed to gain further insight into caries occurrence in Kuopio and Jyväskylä using longitudinal tooth-specific data from public health records on cohorts born in 1970/71 and 1980/81 (total n = 1,503). Survival analyses were used to summarize the tooth-specific times elapsed between eruption and the first filling (used as a proxy for dental caries). Generally, the first filling was placed sooner after eruption in the 1970/71 cohort than in the 1980/81 cohort. The curves for the two towns were virtually identical except for the first molars of the 1970/71 cohort, for which the percentage of filled first molars was consistently lower in Jyväskylä than in Kuopio. This study indicates that, among children and adolescents whose permanent teeth erupted in the mid-1970s or thereafter, even a longitudinal approach did not reveal a lower caries occurrence in the fluoridated than in the low-fluoride reference community. The main reason for the modest effect of water fluoridation in Finnish circumstances is probably the widespread use of other measures for caries prevention. The children have been exposed to such intense efforts to increase tooth resistance that the effect of water fluoridation does not show up any more. The results must not be extrapolated to countries with less intensive preventive dental care.


  

Author Contacts

Liisa Seppä
Institute of Dentistry, University of Oulu
POB 5281
FIN–90014 Oulu (Finland)
Tel. +358 8 537 5577, Fax +358 8 537 5560, E-Mail liisa.seppa@oulu.fi

  

Article Information

Received: Received: August 20, 2001
Accepted after revision: June 26, 2002
Number of Figures : 4, Number of Tables : 1, Number of References : 26

  

Publication Details

Caries Research (Journal of the European Organization for Caries Research (ORCA))
Journal founded 1967 by Y. Ericsson; edited 1970–1987 by K.G. König; 1987–1994 by J.M. ten Cate; 1994–2000 by J. Tenovuo

Vol. 36, No. 5, Year 2002 (Cover Date: September-October 2002)

Journal Editor: R.P. Shellis, Bristol
ISSN: 0008–6568 (print), 1421–976X (Online)

For additional information: http://www.karger.com/journals/cre


Article / Publication Details

First-Page Preview
Abstract of Original Paper

Received: 8/20/2001
Accepted: 6/26/2002
Published online: 10/23/2002

Number of Print Pages: 7
Number of Figures: 4
Number of Tables: 1

ISSN: 0008-6568 (Print)
eISSN: 1421-976X (Online)

For additional information: http://www.karger.com/CRE


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