The Effect of Hydroxyapatite on the Remineralization of Dental Fissure Sealant

The purpose of this study is to investigate the remineralization of enamel in the human tooth by fissure sealant containing various amount of hydroxyapatite. Prior to remineralization experiments, the necessary requirements of the dental fissure sealant, the curing depth and the curing time, were measured with the content of the hydroxyapatite according to the standard of ISO 6874. Various amount of hydroxyapatite was mixed uniformly using sonicator up to 20 wt% to the fissure sealant. In spite both the curing time and the curing depth were decreased with increasing the content of hydroxyapatite, all samples were satisfied the ISO requirements. Remineralization experimental samples were produced by bonding fissure sealant containing various amount of hydroxyapatite to human tooth enamel using manufacturer’s information. After exposure to the simulated body fluid at 36.5oC for 4 weeks, the bonding strength and the surface morphology were examined using Instron and scanning electronic microscope, respectively. The bonding strength between the fissure sealant and the human teeth was drastically enhanced with the amount of hydroxyapatite. The remineralization zone could be observed along with the boundary of hydroxyapatite and fissure sealant using a scanning electronic microscope.

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A Comparison of the Bone-Like Apatite Formation Potency Between Hydroxyapatite and β-Tricalcium Phosphate in Glass Ionomer Dental Luting Cement

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.309-311.885 ◽

2006 ◽

Vol 309-311 ◽

pp. 885-890 ◽

Cited By ~ 1

Author(s):

S.I. Yoon ◽

Yong Keun Lee ◽

Kyoung Nam Kim ◽

S.O. Kim ◽

H.K. Son ◽

...

Keyword(s):

Simulated Body Fluid ◽

Bonding Strength ◽

Body Fluid ◽

Setting Time ◽

Glass Ionomer Cement ◽

Human Blood Plasma ◽

Apatite Formation ◽

Glass Ionomer ◽

Human Teeth ◽

Luting Cement

Previous studies have shown that hydroxyapatite increases the bonding strength of dental luting cement with human teeth by forming bone-like apatite when it is added to cement. However, due to the low solubility of the hydroxyapatite, its ability to form bone-like apatite decreases in protein-free acellular simulated body fluid with ion concentrations nearly equal to those of the human blood plasma. The purpose of this experiment was to increase the formation of bone-like apatite by mixing hydroxyapatite with β-TCP of high solubility. RelyXTM glass ionomer cement(3M/ESPE, USA) was used as dental luting cement. Film thickness, setting time, and compressive strength was measured for each group of 15% hydroxyapatite, 15% β-TCP, and 15% mixed hydroxyapatite and β-TCP (85:15). Every specimen of each group was immersed in the simulated body fluid for four week before measuring bonding strength, and then their sectional surface was observed under SEM. The most noteworthy result was that the group containing β-TCP produced more amount of bone-like apatite compared with the group composed of only hydroxyapatite.

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Contamination from Possible Solar Light Exposures in ESR Dosimetry Using Human Tooth Enamel.

Journal of Radiation Research ◽

10.1269/jrr.39.185 ◽

1998 ◽

Vol 39 (3) ◽

pp. 185-191 ◽

Cited By ~ 14

Author(s):

NORI NAKAMURA ◽

JANINE F. KATANIC ◽

CHYUZO MIYAZAWA

Keyword(s):

Tooth Enamel ◽

Solar Light ◽

Human Tooth ◽

Human Tooth Enamel

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Hexahedrally Based Crystals in Human Tooth Enamel

Caries Research ◽

10.1159/000261432 ◽

1992 ◽

Vol 26 (2) ◽

pp. 69-76 ◽

Cited By ~ 6

Author(s):

T. Kodaka ◽

K. Debari ◽

M. Abe

Keyword(s):

Tooth Enamel ◽

Human Tooth ◽

Human Tooth Enamel

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Investigation on the microtribological behaviour of human tooth enamel by nanoscratch

Wear ◽

10.1016/j.wear.2010.11.020 ◽

2011 ◽

Vol 271 (9-10) ◽

pp. 2290-2296 ◽

Cited By ~ 20

Author(s):

S.Y. Zheng ◽

J. Zheng ◽

S.S. Gao ◽

B.J. Yu ◽

H.Y. Yu ◽

...

Keyword(s):

Tooth Enamel ◽

Human Tooth ◽

Human Tooth Enamel

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Fabrication of Bioactive Stainless Steel by the Function of Apatite Nuclei

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.696.151 ◽

2016 ◽

Vol 696 ◽

pp. 151-156 ◽

Cited By ~ 2

Author(s):

Takeshi Yabutsuka ◽

Ryoki Karashima ◽

Shigeomi Takai ◽

Takeshi Yao

Keyword(s):

Stainless Steel ◽

Simulated Body Fluid ◽

Bonding Strength ◽

Body Fluid ◽

Apatite Layer ◽

Mechanical Interlocking ◽

High Bonding Strength ◽

Fluid Formation ◽

Bonelike Apatite

Micropores were formed on the surfaces of stainless steel (SUS) by sandblasting methods and Apatite Nuclei (AN) were formed in the pores. By this treatments, a bioactive SUS was fabricated. Apatite-forming ability of the SUS was evaluated by immersing in an acellular simulated body fluid. Formation of bonelike apatite was induced on the surface of the SUS within 1 day. High bonding strength of the bonelike apatite layer was achieved by a mechanical interlocking effect between the bonelike apatite formed in the pores and the SUS specimen.

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