| Acid resistance of erbium-doped yttrium aluminum garnet laser-treated and phosphoric acid-etched enamels. | |
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MedLine Citation:
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PMID: 17090176 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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OBJECTIVE: To compare the effects of erbium-doped yttrium aluminum garnet (Er:YAG) laser ablation and of phosphoric acid etching on the in vitro acid resistance of bovine enamel. MATERIALS AND METHODS: Teeth were polished to make the surface flat. The polished enamel was either etched with 37% phosphoric acid for 30 seconds or ablated with a single 33 J/cm2 pulse from an Er:YAG laser. The control specimens were free from acid etching and laser ablation. Changes in crystal structure, dissolved mineral (calcium [Ca] and phosphorus [P]) contents, and calcium distribution in the enamel subsurface after a pH-cycling process were evaluated. RESULTS: After laser treatment, poor crystal structures improved without forming any new phases, such as tricalcium phosphates. Among the tested enamels, dissolved mineral contents were significantly different (P < .05). Er:YAG laser-treated enamels had the lowest mineral dissolution (Ca, 13.78 ppm; P, 6.33 ppm), whereas phosphoric acid-etched enamels had the highest (Ca, 15.90 ppm; P, 7.33 ppm). The reduction rate and reduced depth of calcium content along the subsurface were lowest in Er:YAG laser-treated enamels. CONCLUSION: The Er:YAG laser-treated enamels are more acid resistant to acid attack than phosphoric acid-etched enamels. |
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Authors:
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Jung-Ho Kim; Oh-Won Kwon; Hyung-Il Kim; Yong Hoon Kwon |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: The Angle orthodontist Volume: 76 ISSN: 0003-3219 ISO Abbreviation: Angle Orthod Publication Date: 2006 Nov |
Date Detail:
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Created Date: 2006-11-08 Completed Date: 2007-01-16 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 0370550 Medline TA: Angle Orthod Country: United States |
Other Details:
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Languages: eng Pagination: 1052-6 Citation Subset: D; IM |
Affiliation:
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Department of Orthodontics, College of Dentistry, Kyungpook National University, Daegu, Korea. |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Animals Calcium / analysis Cattle Crystallography, X-Ray Dental Enamel / chemistry, drug effects* Dental Etching / methods* Diphosphonates / pharmacology Electron Probe Microanalysis Erbium Hydrogen-Ion Concentration Lactic Acid / pharmacology Lasers* Phosphoric Acids Phosphorus / analysis |
| Chemical | |
Reg. No./Substance:
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0/Diphosphonates; 0/Phosphoric Acids; 1984-15-2/methylene diphosphonate; 50-21-5/Lactic Acid; 7440-52-0/Erbium; 7440-70-2/Calcium; 7664-38-2/phosphoric acid; 7723-14-0/Phosphorus |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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