| Effect of acidic pretreatment combined with a silane coupling agent on bonding durability to silicon oxide ceramic. | |
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MedLine Citation:
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PMID: 15625674 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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This study examined the effect of different acidic treatments and the role of a phosphate monomer in a silane coupling agent on the durability of the dual-cure resin cement/silicon oxide bond. Ceramic blocks (Vita Celay Blanks) were cut into multiple 3 mm-thick slices and polished using 600 grit SiC paper. Two pairs were left untreated [controls (CTRL)], two pairs were treated with 40% phosphoric acid and rinsed with water for 30 s (PA), and another two pairs treated with 20% hydrofluoric acid followed by 30 s water rinsing (HF). Half the specimens were silanated with Tokuso Ceramics Primer (TCP) (Tokuyama) and the other half with TCP formulated without phosphate monomer (TCP-NoPM). All the pairs were bonded with Bistite II dual-cure resin cement (Tokuyama) and light cured. After 24 h water storage at 37 degrees C, 0.7 mm-thick slabs were serially sectioned. Immediately, after 6 months and after 1 year of water storage, two slabs were randomly selected from each subgroup, and sliced into beams (6 x 0.7 x 0.7 mm) for the microtensile bond strength (muTBS) test. The muTBS data were statistically analyzed using multiple Wilcoxon Signed Rank tests (p < 0.05). Failure modes were determined using a confocal laser-scanning microscope. Ceramic surface morphology after the different acidic treatments was examined using an SEM. After 1 day, in the case of silane treatment with TCP, there were no significant differences in muTBS between the control and acid-treated groups (p > 0.05), whereas with TCP-NoPM, the muTBS of the control was significantly lower than the acid-treated groups (p < 0.05). All the TCP and acid-treated TCP-NoPM groups exhibited significant reductions in muTBS after 6 months (p < 0.05). After 1 year, the muTBS of the acid-treated TCP groups were not significantly different from the control TCP group (p > 0.05). There was also no significant difference between the HF-treated TCP and TCP-NoPM groups (p > 0.05) after 1 year, all exhibiting greater than 10 MPa tensile bond strength. It is suggested that acidic pretreatment of the ceramic surface does not improve the durability of the dual-cure resin cement/silicon oxide ceramic bond when an acidic phosphate monomer is present as an activator in a ceramic primer. |
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Authors:
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Richard M Foxton; Masatoshi Nakajima; Junji Tagami; Hiroyuki Miura |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: Journal of biomedical materials research. Part B, Applied biomaterials Volume: 73 ISSN: 1552-4973 ISO Abbreviation: J. Biomed. Mater. Res. Part B Appl. Biomater. Publication Date: 2005 Apr |
Date Detail:
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Created Date: 2005-03-28 Completed Date: 2005-07-11 Revised Date: 2006-06-22 |
Medline Journal Info:
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Nlm Unique ID: 101234238 Medline TA: J Biomed Mater Res B Appl Biomater Country: United States |
Other Details:
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Languages: eng Pagination: 97-103 Citation Subset: IM |
Copyright Information:
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(c) 2004 Wiley Periodicals, Inc. |
Affiliation:
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Division of Conservative Dentistry, Floor 25, Guy's, King's and St. Thomas' Dental Institute, Guy's Tower, Guy's Hospital, London Bridge, London, SE1-9RT, UK. richard.foxton@kcl.ac.uk |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Acid Etching, Dental
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methods* Acids Bone Cements / chemistry* Ceramics / chemistry* Composite Resins / chemistry Dental Bonding / methods Dental Cements / chemistry Dentin-Bonding Agents / chemistry* Hydrofluoric Acid / chemistry Light Microscopy, Confocal Microscopy, Electron, Scanning Phosphates / chemistry Phosphoric Acids / chemistry Silanes / chemistry* Silicon Dioxide / chemistry* Stress, Mechanical Surface Properties Tensile Strength Time Factors Water |
| Chemical | |
Reg. No./Substance:
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0/Acids; 0/Bone Cements; 0/Ceramics; 0/Composite Resins; 0/Dental Cements; 0/Dentin-Bonding Agents; 0/Phosphates; 0/Phosphoric Acids; 0/Silanes; 7631-86-9/Silicon Dioxide; 7664-38-2/phosphoric acid; 7664-39-3/Hydrofluoric Acid; 7732-18-5/Water |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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