Catalogo Articoli (Spogli Riviste)


Severe dental fluorosis in a Tanzanian population consuming water with negligible fluoride concentration
Yoder, KM; Mabelya, L; Robison, VA; Dunipace, AJ; Brizendine, EJ; Stookey, GK;
Indiana Univ, Sch Dent, Dept Oral Biol, Indianapolis, IN USA Indiana UnivIndianapolis IN USA t, Dept Oral Biol, Indianapolis, IN USA Univ Dar Es Salaam, Fac Dent, Dept Prevent & Community Dent, Dar Es Salaam, Univ Dar Es Salaam Dar Es Salaam Tanzania ommunity Dent, Dar Es Salaam, Johns8Hopkins Univ, Sch Hyg & Publ Hlth, Dept Epidemiol, Baltimore, MD 2121 Johns Hopkins Univ Baltimore MD USA 21218 t Epidemiol, Baltimore, MD 2121 Indiana Univ, Sch Dent, Oral Hlth Res Inst, Indianapolis, IN 46204 USA Indiana Univ Indianapolis IN USA 46204 s Inst, Indianapolis, IN 46204 USA Indiana Univ, Sch Med, Div Biostat, Indianapolis, IN 46204 USA Indiana Univ Indianapolis IN USA 46204 iostat, Indianapolis, IN 46204 USA
Titolo Testata:
fascicolo: 6, volume: 26, anno: 1998,
pagine: 382 - 393
acid-base balance; altitude; dental caries; fluorosis; food additives; hypobaric hypoxia; nutrition;
Tipo documento:
Settore Disciplinare:
Clinical Medicine
Indirizzi per estratti:
Indirizzo: Yoder, KM 2101 E Coliseum Blvd,Neff Hall 150, Ft Wayne, IN 46805 USA 2101E Coliseum Blvd,Neff Hall 150 Ft Wayne IN USA 46805 05 USA
K.M. Yoder et al., "Severe dental fluorosis in a Tanzanian population consuming water with negligible fluoride concentration", COMM DEN OR, 26(6), 1998, pp. 382-393


Objectives: To identify risk factors for dental fluorosis that cannot be explained by drinking water fluoride concentration alone. Methods: Two hundred eighty-four Tanzanian children ages 9 to 19 (mean 14.0+/-SD 1.69), who were lifetime residents at differing altitudes (Chanika, 100 m; Rundugai, 840 m; and Kibosho, 1,463 m; Sites 1, 2,and 3 respectively) were examined fordental fluorosis and caries. They were interviewed about their food habits, environmental characteristics and use of a fluoride-containing food tenderizer known locally as magadi. Meal, urine, water and magadi samples supplied by the participants were analyzed for fluoride content. Urine samples were also analyzed for creatinine concentration. Four magadi samples from Sites I and 3 were analyzed for complete element composition. Results: Of the 13 water samples from Site 2, 10 contained greater than or equal to 4 mg/L F, ranging from 1.26 to 12.36 mg/L with a mean+/-SD of 5.72+/-4.71 mg/L. Sites 1 and 3 had negligible water fluoride of 0.05+/-0.05 and 0.18+/-0.32 mg/L respectively. Mean TFI fluorosis scores (range 0-9) for Site 2 were high: 4.44+/-1.68. In Sites 1 and 3, which both had negligible water fluoride, fluorosis scores varied dramatically: Site 1 mean maximum TFI was 0.01+/-0.07 and Site 3 TFI was 4.39+/-1.52. Mean DMFS was 1.39+/-2.45, 0.15+/-0.73 and 0.19+/-0.61 at Sites 1, 2, and 3, respectively There were no restorations present. Urinary fluoride values were 0.52+/-0.70, 4.34+/-7.62 and 1.43+/-1.80 mg/L F at Sites 1, 2, and 3, respectively. Mean urinary fluoride values at Site 3 were within the normal urinary fluoride reference value range in spite of pervasive severe pitting fluorosis. Meal and magadi analyses revealed widely varied fluoride concentrations. Concentrations ranged from 0.01 to 22.04 mg/L F for meals and from 189 to 83 211 mg/L F for magadi. Complete element analysis revealed the presence of aluminum, iron, magnesium, manganese, strontium and titanium in four magadi samples. There were much higher concentrations of these elements in samples from Site 3, which was at the highest altitude and had severe enamel disturbances in spite of negligible water fluoride concentration. An analysis of covariance model supportedthe research hypothesis that the three communities differed significantly in mean fluorosis scores (P<0.0001). Controlling for urinary fluoride concentration and urinary fIuoride:urinary creatinine ratio, location appeared to significantly affect fluorosis severity. Urinary fluoride:urinary creatinine ratio had a stronger correlation than urinary fluoride concentration with mean TFI fluorosis scores (r=0.43 vs r= 0.25). Conclusions: The severityof enamel disturbances at Site 3 (1463 m) was not consistent with the low fluoride concentration in drinking water, and was more severe than would beexpected from the subjects' normal urinary fluoride values. Location, fluoride in magadi, other elements found in magadi, and malnutrition are variables which may be contributing to the severity of dental enamel disturbancesoccurring in Site 3. Altitude was a variable which differentiated the locations.

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Documento generato il 29/03/20 alle ore 15:26:04