| Influence of aging treatments on microtensile bond strength of adhesive systems to primary dentin. | |
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MedLine Citation:
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PMID: 18477429 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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PURPOSE: The purpose of this study was to evaluate the in vitro influence of aging treatments on the microtensile bond strength of 2-step total-etch and self-etch adhesive systems to primary dentin. METHODS: Class I cavities (4 mm x 4 mm x 2 mm) were prepared in 80 extracted human primary molars divided into 8 groups (N=5) per adhesive system: (1) Single Bond (SI); and (2) Clearfil SE Bond (SE). Restored teeth were exposed to individual and combined aging treatments: (1) thermal (2,000 x at 5-55 degrees C; T); (2) mechanical load (100,000 x 80 N; M); (3) pH (mineralizing/demineralizing solutions; pH); and (4) control (24-hour water storage; C). Beam-shaped microtensile specimens were prepared (0.8 mm2 cross-sectional area) and loaded at a crosshead speed of 1.0 mm/minute in a universal testing machine. Fracture modes were examined by scanning electron microscope. RESULTS: Means (MPa) and standard deviations (+/-) were: (1) SI-T=24.17 (+/-1.99); (2) SI-M=25.64 (+/-9.75); (3) Si-pH=23.43 (+/-4.19); (4) SI-C=33.81 (+/-2.45); (5) SI-TM=18.60 (+/-3.57); (6) SI-TpH=23.90 (+/-4.28); (7) SI-MpH=20.96 (+/-4.06); (8) SI-TMpH=20.94 (+/-3.15); (9) SE-T=24.08 (+/-4.52); (10) SE-M=18.30 (+/-14.12); (11) SE-pH=19.22 (+/-8.93); (12) SE-C=37.80 (+/-7.28); (13) SE-TM=22.89 (+/-11.74); (14) SE-TpH=27.87 (+/-12.77); (15) SE-MpH=18.87 (+/-10.95); and (16) SE-TMpH=22.55 (+/-3.05). Both adhesive systems presented similar dentin bond strength (P>.05) which were significantly reduced when combined aging treatments were applied or when pH cycling (pH) was done. CONCLUSION(S): Combined aging treatments and also pH cycling alone influenced negatively adhesive bond strengths. |
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Authors:
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Rachel Rocha; Fabio Z M Soares; Celia R M D Rodrigues; Leonardo Eloy Rodrigues Filho |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: Journal of dentistry for children (Chicago, Ill.) Volume: 74 ISSN: 1935-5068 ISO Abbreviation: J Dent Child (Chic) Publication Date: 2007 May-Aug |
Date Detail:
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Created Date: 2008-05-14 Completed Date: 2008-07-15 Revised Date: 2008-11-21 |
Medline Journal Info:
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Nlm Unique ID: 101180951 Medline TA: J Dent Child (Chic) Country: United States |
Other Details:
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Languages: eng Pagination: 109-12 Citation Subset: D; IM |
Affiliation:
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Department of Stomatology, University of Santa Maria, Universidade Federal de Santa Maria, Santa Maria, RS, Brazil. rarocha@usp.br |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Acid Etching, Dental
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methods* Bisphenol A-Glycidyl Methacrylate Composite Resins Dental Bonding* Dental Restoration Failure Dental Restoration, Permanent Dental Stress Analysis* Dentin Dentin-Bonding Agents* Hot Temperature Humans Hydrogen-Ion Concentration Molar Resin Cements* Silicon Dioxide Stress, Mechanical Tensile Strength Tooth, Deciduous Zirconium |
| Chemical | |
Reg. No./Substance:
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0/Clearfil SE Bond; 0/Composite Resins; 0/Dentin-Bonding Agents; 0/Resin Cements; 0/Z100 composite resin; 0/single bond; 1565-94-2/Bisphenol A-Glycidyl Methacrylate; 7440-67-7/Zirconium; 7631-86-9/Silicon Dioxide |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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