| A possible mechanism of acquired acid resistance of human dental enamel by laser irradiation. | |
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MedLine Citation:
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PMID: 2160327 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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A possible mechanism of acquired acid resistance of lased enamel was proposed on the basis of the investigations of optical properties, compositional and structural changes and permeability of lased and unlased human dental enamel. Lased enamel showed a high positive birefringence, suggesting the formation of 'microspaces' in enamel. No new products were found, though a decrease of lattice strain and a slight a-axis contraction were recognized in lased enamel compared with unlased enamel. The contents of water, carbonate and organic substances were reduced in lased enamel. Gradual changes of birefringence were observed in lased enamel during treatment with acid solutions, and this change was attributed to mineralization of the microspaces. The ions released by an acid decalcification would be trapped in the microspaces in lased enamel, whereas such ions diffuse to the surrounding solution in unlased enamel. |
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Authors:
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T Oho; T Morioka |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: Caries research Volume: 24 ISSN: 0008-6568 ISO Abbreviation: Caries Res. Publication Date: 1990 |
Date Detail:
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Created Date: 1990-06-27 Completed Date: 1990-06-27 Revised Date: 2008-11-21 |
Medline Journal Info:
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Nlm Unique ID: 0103374 Medline TA: Caries Res Country: SWITZERLAND |
Other Details:
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Languages: eng Pagination: 86-92 Citation Subset: D; IM |
Affiliation:
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Department of Preventive Dentistry, Faculty of Dentistry, Kyushu University, Fukuoka, Japan. |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Acids
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pharmacology Acidulated Phosphate Fluoride / pharmacology Calcium / pharmacology Citrates / pharmacology Dental Enamel / drug effects, radiation effects* Dental Enamel Permeability / drug effects, radiation effects* Dental Enamel Solubility / drug effects, radiation effects* Durapatite Hot Temperature Humans Hydroxyapatites / radiation effects Lactates / pharmacology Lasers* Microscopy, Polarization Perchloric Acid / pharmacology Rosaniline Dyes / pharmacology Sodium Hydroxide / pharmacology Spectrophotometry, Infrared Thermogravimetry Tooth Permeability / radiation effects* X-Ray Diffraction |
| Chemical | |
Reg. No./Substance:
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0/Acids; 0/Citrates; 0/Hydroxyapatites; 0/Lactates; 0/Rosaniline Dyes; 1306-06-5/Durapatite; 1310-73-2/Sodium Hydroxide; 39456-59-2/Acidulated Phosphate Fluoride; 4197-24-4/carbol-fuchsin solution; 7440-70-2/Calcium; 7601-90-3/Perchloric Acid |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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