Distribution of flunoride in human enamel surfaces (III)

Iijima, Youichi; Tazawa, Mitsumasa; Miyazawa, Masato; Katayama, Tsuyoshi; Takaesu, Yoshinori

doi:10.5834/jdh.30.371

Cited by 2 publications

(1 citation statement)

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“…Fluoride-containing toothpastes account for more than 90% of the toothpaste market, and children and adults alike are exposed to 500–1500 ppm of fluoride ions multiple times a day through daily self-care [ 34 , 35 , 36 ]. Although fluoride exposure was not assessed here because bovine teeth were used, in human teeth, approximately 1800 ppm of fluoride ions are present on the tooth surface and inhibit demineralization [ 37 ]. The fluoride concentration in human saliva is 0.05–0.25 ppm but increases to 1–3 ppm after the use of a fluoride-containing dentifrice [ 36 , 38 ].…”

Section: Discussionmentioning

confidence: 99%

In Vitro Risk Assessment of Dental Acid Erosion Caused by Long-Term Exposure to Oral Liquid Bandages

Satou,

Sugihara

2024

Dentistry Journal

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Oral mucosa inflammation can cause severe pain and interfere with eating, reducing quality of life. However, few options for self-care are available. An oral liquid bandage forms a protective film over the affected area. We aimed to assess the acid erosion risk when a newly developed oral liquid bandage (ORAPLA) is accidentally deposited on teeth and to examine the relative acid erosion risk at multiple time points of the maximum recommended duration of continuous use. ORAPLA was applied to both enamel and dentin blocks from 45 bovine anterior mandibular teeth, and an acid challenge was performed in a simulated oral cavity with artificial saliva, with one exposure cycle lasting 6 h. The enamel showed substantial defects and a decrease in Vickers hardness after nine cycles, with no change in surface roughness. Dentin showed an increase in parenchymal defects and surface roughness and a trend toward decreased Vickers hardness with increasing exposure time. We found no significant acid corrosion in enamel after up to nine times the upper limit of normal use time or in dentin after up to six times the upper limit. We conclude that the acid erosion risk due to accidental attachment to teeth is low, and in the human oral cavity with salivary buffering and remineralization, likely even lower.

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Section: Discussionmentioning

confidence: 99%

In Vitro Risk Assessment of Dental Acid Erosion Caused by Long-Term Exposure to Oral Liquid Bandages

Satou,

Sugihara

2024

Dentistry Journal

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A new method for analyzing the distribution of fluoride in human enamel.

Shida

Matsushima

Wada

1986

The Journal of Nihon University School of Dentistry

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A new method for analyzing the fluoride content of the surface layer of human enamel was devised and used in a comparative study, along with methods which have hitherto been reported. The results obtained showed a high correlation between the decalcified depth (X) and the cumulative amount of fluoride in the region from the enamel surface (Y) to the deeper layers, as expressed by the regression power curve (Y=aXb).Furthermore, it was confirmed that the cumulative amount of fluoride from the enamel surface as calculated from this graph was of a value extremely close to the determined value and it was thus possible to obtain better results than in the cases where other methods were used, irrespective of the amount of fluoride contained in the enamel. The regression power curve thus produced was then difdepth. Consequently, it was suggested that this would provide an extremely effective and expedient method for determining the distribution of fluoride concentration in human enamel in the future.

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Distribution of flunoride in human enamel surfaces (III)

Cited by 2 publications

References 10 publications

In Vitro Risk Assessment of Dental Acid Erosion Caused by Long-Term Exposure to Oral Liquid Bandages

In Vitro Risk Assessment of Dental Acid Erosion Caused by Long-Term Exposure to Oral Liquid Bandages

A new method for analyzing the distribution of fluoride in human enamel.

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