摘要

The aims of this study were to observe the release of fluoride ions (F-) from GC-Fuji Lining-LC® glass-ionomer cement, to assess the diffusion process, and to measure fluoride diffusivity (D) in the set cement. Specimens of various dimensions and shapes, ranging from discs to cylindrical rods, were fabricated for both open and embedded modes of testing. In the open mode studies, specimens with different surface to volume ratios were selected and immersed in 37°C distilled water. In the embedded mode studies, only one diametral surface of the rod-shaped specimens of different lengths and diameters was exposed. F- concentration was measured using a fluoride electrode. The storage solution was analysed at predetermined intervals hourly, daily, and weekly (up to 10 weeks). Immediately after each sampling, the old storage solution was discarded and replaced with new distilled water. F- release from the set cements was detectable (0.4-3.8 ppm, varied with sample geometry), even after a 10-week sampling interval. F- release was greater in ground set cements (0.37 ppm/mg powder) than in control samples of unmixed powder (0.01 ppm/mg powder) immersed for 1 h. Two mechanisms for F- release were proposed. One was short-term and involved rapid dissolution from the cement surface. The other was more gradual and resulted in the sustained diffusion of ions through the bulk cement, which can be modelled by applying a mathematical technique known as separation of variables to Fick's Second Law of Diffusion. The mean D of F- in embedded set cements of glass-ionomer was (1.4 ± 0.5) × 10-11 cm2/s, with higher apparent D observed in open mode samples [(7.6 ± 1.4) × 10-11 cm2/s].

原文英語
頁(從 - 到)576-586
頁數11
期刊Journal of Oral Rehabilitation
27
發行號7
出版狀態已發佈 - 七月 2000

指紋

Glass Ionomer Cements
Fluorides
Powders
Ions
Process Assessment (Health Care)
Water
Electrodes

ASJC Scopus subject areas

  • Dentistry(all)

引用此文

Fluoride ion diffusion from a glass-ionomer cement. / Lee, Sheng Yang; Dong, De Rei; Huang, Haw Ming; Shih, Yung Hsun.

於: Journal of Oral Rehabilitation, 卷 27, 編號 7, 07.2000, p. 576-586.

研究成果: 雜誌貢獻文章

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abstract = "The aims of this study were to observe the release of fluoride ions (F-) from GC-Fuji Lining-LC{\circledR} glass-ionomer cement, to assess the diffusion process, and to measure fluoride diffusivity (D) in the set cement. Specimens of various dimensions and shapes, ranging from discs to cylindrical rods, were fabricated for both open and embedded modes of testing. In the open mode studies, specimens with different surface to volume ratios were selected and immersed in 37°C distilled water. In the embedded mode studies, only one diametral surface of the rod-shaped specimens of different lengths and diameters was exposed. F- concentration was measured using a fluoride electrode. The storage solution was analysed at predetermined intervals hourly, daily, and weekly (up to 10 weeks). Immediately after each sampling, the old storage solution was discarded and replaced with new distilled water. F- release from the set cements was detectable (0.4-3.8 ppm, varied with sample geometry), even after a 10-week sampling interval. F- release was greater in ground set cements (0.37 ppm/mg powder) than in control samples of unmixed powder (0.01 ppm/mg powder) immersed for 1 h. Two mechanisms for F- release were proposed. One was short-term and involved rapid dissolution from the cement surface. The other was more gradual and resulted in the sustained diffusion of ions through the bulk cement, which can be modelled by applying a mathematical technique known as separation of variables to Fick's Second Law of Diffusion. The mean D of F- in embedded set cements of glass-ionomer was (1.4 ± 0.5) × 10-11 cm2/s, with higher apparent D observed in open mode samples [(7.6 ± 1.4) × 10-11 cm2/s].",
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TY - JOUR

T1 - Fluoride ion diffusion from a glass-ionomer cement

AU - Lee, Sheng Yang

AU - Dong, De Rei

AU - Huang, Haw Ming

AU - Shih, Yung Hsun

PY - 2000/7

Y1 - 2000/7

N2 - The aims of this study were to observe the release of fluoride ions (F-) from GC-Fuji Lining-LC® glass-ionomer cement, to assess the diffusion process, and to measure fluoride diffusivity (D) in the set cement. Specimens of various dimensions and shapes, ranging from discs to cylindrical rods, were fabricated for both open and embedded modes of testing. In the open mode studies, specimens with different surface to volume ratios were selected and immersed in 37°C distilled water. In the embedded mode studies, only one diametral surface of the rod-shaped specimens of different lengths and diameters was exposed. F- concentration was measured using a fluoride electrode. The storage solution was analysed at predetermined intervals hourly, daily, and weekly (up to 10 weeks). Immediately after each sampling, the old storage solution was discarded and replaced with new distilled water. F- release from the set cements was detectable (0.4-3.8 ppm, varied with sample geometry), even after a 10-week sampling interval. F- release was greater in ground set cements (0.37 ppm/mg powder) than in control samples of unmixed powder (0.01 ppm/mg powder) immersed for 1 h. Two mechanisms for F- release were proposed. One was short-term and involved rapid dissolution from the cement surface. The other was more gradual and resulted in the sustained diffusion of ions through the bulk cement, which can be modelled by applying a mathematical technique known as separation of variables to Fick's Second Law of Diffusion. The mean D of F- in embedded set cements of glass-ionomer was (1.4 ± 0.5) × 10-11 cm2/s, with higher apparent D observed in open mode samples [(7.6 ± 1.4) × 10-11 cm2/s].

AB - The aims of this study were to observe the release of fluoride ions (F-) from GC-Fuji Lining-LC® glass-ionomer cement, to assess the diffusion process, and to measure fluoride diffusivity (D) in the set cement. Specimens of various dimensions and shapes, ranging from discs to cylindrical rods, were fabricated for both open and embedded modes of testing. In the open mode studies, specimens with different surface to volume ratios were selected and immersed in 37°C distilled water. In the embedded mode studies, only one diametral surface of the rod-shaped specimens of different lengths and diameters was exposed. F- concentration was measured using a fluoride electrode. The storage solution was analysed at predetermined intervals hourly, daily, and weekly (up to 10 weeks). Immediately after each sampling, the old storage solution was discarded and replaced with new distilled water. F- release from the set cements was detectable (0.4-3.8 ppm, varied with sample geometry), even after a 10-week sampling interval. F- release was greater in ground set cements (0.37 ppm/mg powder) than in control samples of unmixed powder (0.01 ppm/mg powder) immersed for 1 h. Two mechanisms for F- release were proposed. One was short-term and involved rapid dissolution from the cement surface. The other was more gradual and resulted in the sustained diffusion of ions through the bulk cement, which can be modelled by applying a mathematical technique known as separation of variables to Fick's Second Law of Diffusion. The mean D of F- in embedded set cements of glass-ionomer was (1.4 ± 0.5) × 10-11 cm2/s, with higher apparent D observed in open mode samples [(7.6 ± 1.4) × 10-11 cm2/s].

KW - fluoride

KW - Fuji glass ionomer lining cement

KW - Fuji glass-ionomer lining cement

KW - glass ionomer

KW - ion

KW - article

KW - chemical model

KW - chemistry

KW - diffusion

KW - kinetics

KW - materials testing

KW - regression analysis

KW - solubility

KW - Diffusion

KW - Fluorides

KW - Glass Ionomer Cements

KW - Ions

KW - Kinetics

KW - Least-Squares Analysis

KW - Materials Testing

KW - Models, Chemical

KW - Solubility

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EP - 586

JO - Journal of Oral Rehabilitation

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