| Surface roughness and enamel loss with two microabrasion techniques. | |
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MedLine Citation:
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PMID: 19142257 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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AIM: The aim of this study was to evaluate and compare the surface roughness and enamel loss produced by two microabrasion techniques. METHODS AND MATERIALS: Bovine teeth were selected and an area was delimited for microabrasion techniques. Surface roughness was determined before and after treatment using a digital profilometer. Specimens were randomized to one of two acid treatments (n = 10): 18% hydrochloric acid (HCl) and pumice or 37% phosphoric acid (H3PO4) and pumice. Acid treatments were applied using a wooden spatula for 5 seconds for a total of ten applications. Then, specimens were sectioned through the center of the demineralization area to obtain 80 microm thick slices. The wear produced by the microabrasion techniques was evaluated using stereomicroscopy (40 x). The greatest depth (microm) and the total surface area (microm(2)) of demineralization were measured using the Image Tool software (University of Texas Health Science, San Antonio, TX, USA). In addition, three specimens of each group were subjected to SEM analysis at different magnifications. RESULTS: The mean surface roughness was statistically lower for HCl than for H3PO4 (p < 0.001). Deeper demineralization (p < 0.003) and a larger total demineralization area was observed for HCl (p < 0.005). Under SEM analysis H3PO4 showed a selective conditioning etching, while HCl exhibited a non-selective pattern. CONCLUSIONS: Microabrasion using H3PO4 produced greater surface roughness but less demineralization than the microabrasion technique using HCl. CLINICAL SIGNIFICANCE: Both microabrasion techniques effectively remove the superficial enamel layer. However, the technique using H3PO4 was less aggressive, safer, and easier to perform. |
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Authors:
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Sonia Saeger Meireles; Darvi de Almeida Andre; Ferdinan Luis Leida; Jorge Saldivar Bocangel; Flavio Fernando Demarco |
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Publication Detail:
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Type: Comparative Study; Evaluation Studies; Journal Article Date: 2009-01-01 |
Journal Detail:
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Title: The journal of contemporary dental practice Volume: 10 ISSN: 1526-3711 ISO Abbreviation: J Contemp Dent Pract Publication Date: 2009 |
Date Detail:
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Created Date: 2009-01-14 Completed Date: 2009-04-27 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 101090552 Medline TA: J Contemp Dent Pract Country: United States |
Other Details:
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Languages: eng Pagination: 58-65 Citation Subset: D; IM |
Affiliation:
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Department of Operative Dentistry, Federal University of Paraíba, João Pessoa, PB, Brazil. soniasaeger@hotmail.com |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Acid Etching, Dental
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methods* Animals Cattle Dental Enamel / drug effects, ultrastructure Enamel Microabrasion / methods* Hydrochloric Acid / pharmacology Microscopy, Electron, Scanning Phosphoric Acids / pharmacology Random Allocation Silicates Surface Properties |
| Chemical | |
Reg. No./Substance:
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0/Phosphoric Acids; 0/Silicates; 1332-09-8/pumice; 7647-01-0/Hydrochloric Acid; 7664-38-2/phosphoric acid |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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