| 0249 Enamel Fluorosis, Non-Fluoride Opacities, and Caries Among Norwegian Children | ||
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D. PENDRYS1, O. HAUGEJORDEN2, A. BÅRDSEN2, N.J. WANG2, and F. GUSTAVSEN3, 1University of Connecticut Health Center, Farmington, USA, 2University of Bergen, Norway, 3University of Bergen Objectives: This international collaborative, population-based investigation reports the relationship between enamel fluorosis, non-fluoride opacities, and caries among Norwegian children, who used fluoride under protocols similar to the most recent U.S. protocols. Methods: As part of an ongoing case-control study, 1847 school-based examinations were conducted in Bergen, Norway by two calibrated examiners, using the Fluorosis Risk Index (FRI) to assess fluorosis and non-fluoride opacities, and modified NIDCR caries criteria, with teeth lightly dried. Logistic regression and ANOVA were used for the initial analyses presented. Results: Mean age was 12.7±1.2 years; 49% were female. Examiner agreement on FRI classification I (early forming) and classification II (later forming) enamel surface zones was respectively as follows. For fluorosis: intra-examiner was 98.1% and 97.2%; inter-examiner was 88.0% and 91.4%; for non-fluoride opacities: intra-examiner was 99.1% and 100%; inter-examiner was 96.4% and 98.8%. Intra- and inter-examiner intra-class correlation estimates for DMFS were 0.81 and 0.82 (94% & 91% agreement respectively on DMFS free). 37% of subjects showed signs of fluorosis, 4% of mild or greater severity; 22% of subjects had non-fluoride opacities. Subjects with fluorosis had a lower mean DMFS compared to those fluorosis free (1.62±2.64 and 2.49±3.12, respectively on FRI II surfaces, p<0.05); and higher proportion DMFS free (55.2% and 40.6% respectively, p<0.05). Subjects with non-fluoride opacities had a higher mean DMFS compared to opacity free subjects (3.25±3.26 and 1.56±2.39, respectively on FRI I surfaces; p<0.05); and lower proportion DMFS free (25.3% vs 53.3%, respectively, p<0.05). Conclusions: Adjusted for each other, age, gender, eruption status, and orthodontic banding, the presence of enamel fluorosis was associated with lower DMFS; the presence of non-fluoride opacities was associated with higher DMFS. This work was supported by NIDCR grant DE13671 with additional support from Meltzer College Fund, project no. 480171. | ||
| Seq #56 - Epidemiology 10:45 AM-12:45 PM, Thursday, 10 March 2005 Baltimore Convention Center 331 | ||
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