I've managed to find a few direct studies that show a reduction in caries, fillings, and extractions, in fluoridated communities compared to non. These are all summarized in a meta-analyses but i'm sure you want to examine the primary evidence for yourself.
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Brunelle JA, Carlos JP. Recent trends in dental caries in U.S. children. J Dent Res 1990;69:723–7.
Grembowski D, Fiset L, Spadafora A. How fluoridation affects adult dental caries. J Am Dent Assoc 1992;123:49–54.
Gillcrist JA, Brumley DE, Blackford JU. Community fluoridation status and caries experience in children. J Public Health Dent 2001;61:168–71.
Kumar JV, Green EL, Coluccio C, Davenport R. Oral health status of second grade school children in upstate New York. NY State Dent J 2001;67:26–31.
Ismail AI, Brodeur J-M, Kavanagh M, Boisclair G, Tessier C, Picotte L. Prevalence of dental caries and dental fluorosis in students, 11–17 years of age, in fluoridated and non-fluoridated cities in Quebec. Caries Res 1990;24:290–7.
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Clark DC, Hann HJ, Williamson MF, Berkowitz J. Effects of lifelong consumption of fluoridated water or use of fluoride supplements on dental caries. Community Dent Oral Epidemiol 1995;23:20–4.
Brezina AJ, Baranchuk LN. [Water fluoridation in the city of Buenos Aires]. Rev Asoc Odontol Argent 1991;79:32–5.
Cortes DF, Ellwood R, O'Mullane DM, Bastos JRM. Drinking water fluoride levels, dental fluorosis, and caries experience in Brazil. J Public Health Dent 1996;56:226–8.
Dini EL, Holt RD, Bedi R. Prevalence and severity of caries in 3–12-year-old children from three districts with different fluoridation histories in Araraquara, SP, Brazil. Community Dent Health 1998;15:44–8.
Sales-Peres SHC, Bastos JRM. Perfil epidemiológico de cárie dentária em crianças de 12 anos de idade, residents em cidades fluoretadas e não fluoretadas, na Região Centro-Oeste do Estado de São Paulo, Brazil. [An epidemiological profile of dental caries in 12-year-old children residing in cities with and without fluoridated water supply in the central western area of the State of São Paulo, Brazil]. Cad Saúde Pública 2002;18:1281–8.
Cypriano S, Pecharki GD, de Sousa MLR, Wada RS. A saúde buccal de escolares residents em locais com ou sem fluoretação nas águas de abastecimento public na região de Sorocaba, São Paulo, Brazil. [Oral health of schoolchildren residing in areas with or without water fluoridation in Soraba, São Paulo State, Brazil]. Cad Saúde Pública 2003;19:1063–71.
Tagliaferro EPS, Cypriano S, Sousa MLR, Wada RS. Caries experience among schoolchildren in relation to community fluoridation status and town size. Acta Odontol Scand 2004;62:124–8.
Saliba NA, Moimaz SAS, Casotti CA, Pagliari AV. Dental caries of lifetime residents in Baixo Guandu, Brazil, fluoridated since 1953 – a brief communication. J Public Health Dent 2008;68:119–21.
Bastos RS, Olympio KP, Bijella VT, Buzalaf MAR, Bastos JRM. Trends in dental caries prevalence in 12-year-old schoolchildren between 1976 and 2001 in Bauru, Brazil. Public Health 2005;119:269–75.
Ramires I, Buzalaf MAR. A fluoretação da água de abastecimento public e seus benefícios no controle da cárie dentária – cinqüenta anos no Brazil. [Fifty years of fluoridation of public water supplies in Brazil: benefits for the control of dental caries]. Cien Saude Colet 2007;12:1057–65.
Murray JJ, Breckon JA, Reynolds PJ, Tabari ED, Nunn JH. The effect of residence and social class on dental caries experience in 15–16-year-old children living in three towns (natural, adjusted fluoride and low fluoride) in the north east of England. Br Dent J 1991;171:319–22.
Thomas FD, Kassab JY. Fluoridation in Anglesey: a clinical study of dental caries in mothers at term. Br Dent J 1992;173:136–40.
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Evans DJ, Rugg-Gunn AJ, Tabari ED. The effect of 25 years of water fluoridation in Newcastle assessed in four surveys of 5-year-old children over an 18-year period. Br Dent J 1995;178:60–4.
Ellwood RP, O'Mullane DM. The association between area deprivation and dental caries in groups with and without fluoride in their drinking water. Community Dent Health 1995;12:18–22.
Jones C, Taylor G, Woods K, Whittle G, Evans D, Young P. Jarman underprivileged area scores, tooth decay and the effect of water fluoridation. Community Dent Health 1997;14:156–60.
Jones CM, Taylor GO, Whittle JG, Evans D, Trotter DP. Water fluoridation, tooth decay in 5 year olds, and social deprivation measured by the Jarman score: analysis of data from British dental surveys. Br Med J 1997;315:514–7.
Riley JC, Lennon MA, Ellwood RP. The effect of water fluoridation and social inequalities on dental caries in 5-year-old children. Int J Epidemiol 1999;28:300–5.
Tickle M, Milsom KM, Jenner TM, Blinkhorn AS. The geodemographic distribution of caries experience in neighboring fluoridated and nonfluoridated populations. J Public Health Dent 2003;63:92–8.
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Whelton H, Crowley E, O'Mullane D, Donaldson M, Kelleher V, Cronin M. Dental caries and enamel fluorosis among the fluoridated and non-fluoridated populations in the Republic of Ireland in 2002. Community Dent Health 2004;21:37–44.
Whelton H, Crowley E, O'Mullane D, Donaldson M, Cronin M, Kelleher V. Dental caries and dental fluorosis among the fluoridated population in the Republic of Ireland and non fluoridated population in Northern Ireland in 2002. Community Dent Health 2006;23:37–
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Stockwell AJ, Medcalf GW, Rutledge GJ, Holman CDJ, Roberts M. Dental caries experience in schoolchildren in fluoridated and non-fluoridated communities in Western Australia. Community Dent Oral Epidemiol 1990;18:184–9.
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