Browsing by Subject "dental fluorosis"

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    Aesthetical perception of dental fluorosis in a Colombian low income community
    (Universidad CES, 2020-12) Fragelli, Camila; Restrepo, Manuel; Bussaneli, Diego Girotto; Jeremias, Fabiano; de Cássia Loiola Cordeiro, Rita; Escobar-Rojas, Alfonso; Martinez-Mier, E. Angeles; dos Santos-Pinto, Lourdes; Cariology, Operative Dentistry and Dental Public Health, School of Dentistry
    Introduction and objective : Dental fluorosis (DF) is a defect in the development of enamel as a result of overexposure to fluoride and can aesthetically compromise the patient. This study aims to investigate the relationship between aesthetic perception and dental fluorosis in a low-income community with a high prevalence of DF. Materials and methods: A cross-sectional study was carried out with 171 schoolchildren aged 8 to 12 who live in a low socioeconomic community (El Cedro, Ayapel district, Córdoba, Colombia). The students were examined for dental caries (DMFT and dmft indexes (WHO criteria) and for dental fluorosis (TF index). Aesthetic perception was verified with the questionnaire on children's perceptions of the appearance of teeth (CQATA) Data analysis was performed using descriptive statistics and chi-square tests, Student's t, one-way ANOVA and linear regression (p ≤ 0.05). Results: The prevalence of DF was 84.8% (n = 145). Only the presence of caries (DMFT / deft ≠ 0) had a significant impact on aesthetic perceptions. A significantly lower rate was found in girls for the pleasant color report. The number of teeth affected by FD had a significant positive correlation with the general perception of dental health. Conclusion : The presence of mild DF in children with low socioeconomic status, in a population with a high prevalence of this enamel defect, did not seem to have an impact on accepting the appearance of tooth color.
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    Fluoride Dentifrice Overcomes the Lower Resistance of Fluorotic Enamel to Demineralization
    (Karger, 2019) Almeida, L. F.; Marín, L. M.; Martínez-Mier, E. A.; Cury, J. A.; Cariology, Operative Dentistry and Dental Public Health, School of Dentistry
    We evaluated if the low resistance of fluorotic enamel to demineralization could be overcome by fluoride dentifrice (FD) treatment. Paired enamel slabs of sound and fluorotic enamel (n = 20/group) from human teeth presenting Thylstrup and Fejerskov index (TF) scores from 0 to 4 were obtained. Half of the anatomic surface of the enamel slabs was isolated and used as a control (baseline) regarding enamel mineralization and fluoride concentration. The slabs were submitted to a pH-cycling model simulating a high cariogenic challenge, and 2×/day they were treated with placebo dentifrice (PD) or FD (1,100 µg F/g, as NaF). After 10 days, the slabs were cut into two halves. Enamel demineralization was evaluated by cross-sectional microhardness in one half, and the fluoride formed (FF) concentration was determined in the other half. For statistical analysis, the data on net demineralization area (ΔΔS) and FF (µg F/g) were grouped into TF0, TF1–2, and TF3–4, and analyzed by two-way ANOVA followed by Tukey’s test (α = 5%). The factors studied were TF (0, 1–2, and 3–4) and dentifrice treatment (PD or FD). The effect of the factors was statistically significant for ΔΔS and FF (p < 0.05). In the PD group, the following pattern for ΔΔS was observed: TF3–4 > TF1–2 > TF0 (p < 0.05); however, the groups did not differ (p > 0.05) when FD was used. Regarding FF, the groups treated with PD did not differ (p > 0.05), but the greatest (p < 0.05) FF concentration was found in group TF3–4 treated with FD. These findings suggest that the higher susceptibility of fluorotic enamel to demineralization lesions is decreased by the use of FD.
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    Susceptibility of fluorotic enamel to dental erosion-abrasion
    (SciELO, 2023) Silva, Cristiane Araújo Maia; de Sousa, Frederico Barbosa; Martinez-Mier, Esperanza Angeles; Kelly, Adam Benjamin; Eckert, George J.; Hara, Anderson Takeo; Biomedical and Applied Sciences, School of Dentistry
    Dental hard tissue conditions can be of pre- or post-eruptive nature, such as enamel fluorosis and erosive tooth wear (ETW), respectively. Dental enamel fluorosis is caused by the chronic and excessive intake of fluoride during enamel development, leading to increased fluoride concentration and increased porosity. ETW has become a common clinical condition and often impairs dental function and aesthetics. This in vitro study tested the hypothesis that fluorotic enamel presents different susceptibility to dental erosion-abrasion. It consisted of a 3×3×2 factorial design, considering a) fluorosis severity: sound (TF0), mild (TF1-2), moderate (TF3-4); b) abrasive challenge: low, medium, and high; and c) erosive challenge: yes or no. A total of 144 human teeth were selected according to the three fluorosis severity levels (n=48), and subdivided into six groups (n = 8) generated by the association of the different erosive and abrasive challenges. Enamel blocks (4×4 mm) were prepared from each tooth and their natural enamel surfaces subjected to an erosion-abrasion cycling model. After cycling, the depth of the lesions in enamel was assessed by profilometry. ANOVA showed that the three-way and two-way interactions among the factors were not significant (p > 0.20). Enamel fluorosis level (p=0.638) and abrasion level (p = 0.390) had no significant effect on lesion depth. Acid exposure caused significantly more enamel surface loss than water (p < 0.001). Considering the limitations of this in vitro study, fluorosis did not affect the susceptibility of enamel to dental erosion-abrasion.