The index of refraction of dental enamel apatite

Houwink, B

doi:10.1038/sj.bdj.4803346

Cited by 25 publications

(14 citation statements)

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“…If an incipient lesion could be remineralized, its colour would be altered, as the translucency of enamel occurs in function of its mineral content. 7,8 In previous studies, the remineralization action of highly concentrated fluorides, such as those found in oral rinses, was observed and shown to prevent incipient caries progression. 29 Nevertheless, this remineralization seems to be superficial.…”

Section: Discussionmentioning

confidence: 96%

“…Since the refractive index of water is 1.33 and of air is 1.00, the larger difference, and consequently a greater scattering, are produced at the enamel/ air interace. 7,8 The appearance of a white spot lesion is related to its activity, and the consequence of disease control would be seen clinically by a change from chalky and rough (active) to bright and smooth (inactive). Although it has been suggested that white spot lesions could regress or even disappear due to mechanical removal of the affected enamel and remineralization, 9 clinical studies using fluoride toothpaste and gel in longexisting white spot lesions showed no significant enhancement of remineralization.…”

Section: Introductionmentioning

confidence: 99%

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Effect of caries infiltration technique and fluoride therapy on the colour masking of white spot lesions

Torres¹,

Borges²,

Torres³

et al. 2011

Journal of Dentistry

152

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Section: Discussionmentioning

confidence: 96%

Section: Introductionmentioning

confidence: 99%

Effect of caries infiltration technique and fluoride therapy on the colour masking of white spot lesions

Torres¹,

Borges²,

Torres³

et al. 2011

Journal of Dentistry

152

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“…More over, preliminary mass spectrometry data showed that the weight losses were almost exclusively due to release of water [David son and deGee, 1976], The dehydration in this range is reported to be reversible; about 1% can be exchanged with D20 [Lit tle and Casciani, 1966] or with various im mersion fluids [Darling, 1956;Houwink, 1974], This loosely bound water will not be discussed in this paper. The experimental losses are in good agreement with the meas urements of the previously mentioned au thors.…”

Section: Discussionmentioning

confidence: 99%

Thermal Analysis Studies on Sound and Artificially Decalcified Tooth Enamel

Davidson¹,

Arends²

1977

Caries Res

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Sound and artificially decalcified enamel has been studied by dynamic and static thermal analysis. Weight losses mainly due to water release occur in 3 temperature ranges: 20–150, 150–400 and 400–550 °C. Special attention has been given to water release occurring in the range 150–400 °C. Here the weight losses for sound and carious enamel are 1.9 ± 0.3 and 4.5 ± 0.9%, respectively. Possible models for HPO₄²^–– and H₂O incorporation are discussed. The experimental thermal analysis studies, combined with infrared and X-ray data indicate that the mineral phase in sound enamel and carious enamel can be approximated by the formulae of water-containing non-stoichiometric apatites. In the temperature range 150–400 °C, the (firmly bound) H₂O content in sound and carious enamel is comparable. The significant difference in weight loss between sound and carious enamel is caused by the differences in HPO₄^2–– content.

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“…If the enamel porosities of an early-stage lesion are filled with an aqueous solution showing the same refraction index of hydroxyapatite, the existing spaces are full and the enamel keeps its translucency. 2 Since the stage of white spot does not involve enamel cavitation, noninvasive treatment with topical fluorides associated with diet and hygiene procedure orientation are recommended. However, the whitish appearance may remain, even if the lesion is arrested.…”

Section: Introductionmentioning

confidence: 99%

Color Stability of Resin Used for Caries Infiltration After Exposure to Different Staining Solutions

Borges

Caneppele

Luz

et al. 2014

Operative Dentistry

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Patients should be aware of minimizing the intake of colored staining solutions when submitted to resin infiltration treatment of white spot lesions in esthetically compromised areas. SUMMARYPurpose: The aim of this study was to investigate the staining behavior of demineralized enamel infiltrated by low-viscosity resin.Methods and Materials: Bovine enamel/dentin cylindrical samples (3 3 2 mm) were assigned into four groups (n=45) according to the enamel treatment: sound enamel (control), demineralization + artificial saliva, demineralization + daily application of 0.05% NaF, demineralization + resin infiltration (Icon, DMG). Artificial white spot lesions were produced in groups with demineralization. After the treatments, color was assessed by spectrophotometry, using the CIE L*a*b* system. The specimens (n=15) were then immersed in deionized water, red wine, or coffee for 10 minutes daily for eight days. Color was measured again, and the specimens were repolished with sandpaper discs. The final color was assessed. Data were analyzed by two-way analysis of variance and Tukey tests (a=0.05). A paired t-test was used for comparison between staining and repolishing conditions.Results: There were significant differences for surface treatment and dye after staining and repolishing. Immersion in wine and coffee resulted in significantly increased color alteration (DE) compared with water (p=0.001). The resin-infiltrated group exhibited the highest staining values (p=0.001). The repolishing procedures resulted in significantly decreased color change.

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The index of refraction of dental enamel apatite

Cited by 25 publications

References 0 publications

Effect of caries infiltration technique and fluoride therapy on the colour masking of white spot lesions

Effect of caries infiltration technique and fluoride therapy on the colour masking of white spot lesions

Thermal Analysis Studies on Sound and Artificially Decalcified Tooth Enamel

Color Stability of Resin Used for Caries Infiltration After Exposure to Different Staining Solutions

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