| Hydrofluoric acid on dentin should be avoided. | |
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MedLine Citation:
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PMID: 20359738 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Hydrofluoric acid can be used for intra-oral repair of restorations. Contamination of tooth substrate with hydrofluoric acid cannot always be avoided. OBJECTIVES: To investigate the bonding effectiveness to hydrofluoric acid contaminated dentin by, micro-tensile bond strength testing, SEM and TEM. METHODS: For this study, 15 molar teeth were used of which dentin surfaces were subjected to five, different etching procedures. Group A, 37.5% phosphoric acid (Kerr Gel) (control group); group B, 37.5% phosphoric acid followed by 3% hydrofluoric acid (DenMat); group C, 37.5% phosphoric acid, followed by 9.6% hydrofluoric acid (Pulpdent); group D, 3% hydrofluoric acid followed by 37.5%, phosphoric acid; group E, 9.6% hydrofluoric acid followed by 37.5% phosphoric acid. After the bonding procedure (OptiBond FL, Kerr) a composite resin build-up (Clearfil AP-X, Kuraray), was made. After 1 week storage, specimens were prepared for micro-tensile bond testing, SEM- and, TEM-analysis. Data were analyzed using ANOVA and post hoc Tukey's HSD (p<0.05). RESULTS: In the control group (solely phosphoric acid), the mean microTBS was 53.4+/-10.6 MPa, which was, significantly higher than any hydrofluoric acid prepared group (group A versus groups B-E, p<0.001). No, significant differences in microTBS were found between the 3% and 9.6% hydrofluoric acid groups: group B versus group C (13.5+/-5.5 MPa and 18.7+/-4.3 MPa, respectively) or group D versus group E (19.9+/-6.8 MPa and 20.3+/-4.1 MPa, respectively). SIGNIFICANCE: Due to its adverse effect on the bond strength of composite to dentin, contact of hydrofluoric acid to dentin should be avoided. |
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Authors:
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B A C Loomans; A Mine; F J M Roeters; N J M Opdam; J De Munck; M C D N J M Huysmans; B Van Meerbeek |
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Publication Detail:
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Type: Journal Article Date: 2010-03-31 |
Journal Detail:
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Title: Dental materials : official publication of the Academy of Dental Materials Volume: 26 ISSN: 1879-0097 ISO Abbreviation: Dent Mater Publication Date: 2010 Jul |
Date Detail:
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Created Date: 2010-05-31 Completed Date: 2010-09-22 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 8508040 Medline TA: Dent Mater Country: England |
Other Details:
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Languages: eng Pagination: 643-9 Citation Subset: D |
Copyright Information:
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Copyright 2010 Academy of Dental Materials. Published by Elsevier Ltd. All rights reserved. |
Affiliation:
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Department of Preventive and Restorative Dentistry, Radboud University Nijmegen Medical Centre, The Netherlands. b.loomans@dent.umcn.nl |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Acid Etching, Dental
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methods* Calcium Fluoride / analysis Composite Resins Dental Bonding* Dental Stress Analysis Dentin / drug effects*, ultrastructure Dentin Permeability / drug effects Dentin-Bonding Agents Humans Hydrofluoric Acid / adverse effects* Methacrylates Microscopy, Electron Phosphoric Acids Resin Cements Tensile Strength |
| Chemical | |
Reg. No./Substance:
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0/Clearfil AP-X; 0/Composite Resins; 0/Dentin-Bonding Agents; 0/Methacrylates; 0/OptiBond FL; 0/Phosphoric Acids; 0/Resin Cements; 7664-38-2/phosphoric acid; 7664-39-3/Hydrofluoric Acid; 7789-75-5/Calcium Fluoride |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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