Abstract:
:The objective of this study was to test the hypothesis that thermal cycling weakens the flexural strength of porcelain. Specimens of Deguceram Gold and Vita Omega 900 were tested in four groups of 30 specimens each: in the original glazed condition versus being ground with 1000-grit, 600-grit, and 100-grit silicon carbide abrasives. Corresponding to these four types of surface treatments, four groups of 30 specimens per group received 5,000 times of thermal cycling. Flexural strength was measured using a four-point flexural test, and Weibull modulus was calculated. Within each type of surface treatment, the thermal cycling treatment did not result in any decrease in flexural strength although it caused the Weibull modulus to become smaller - except for the control and thermal-cycled groups of 600-grit surface treatment.
journal_name
Dent Mater Jjournal_title
Dental materials journalauthors
Nakamura Y,Hojo S,Sato Hdoi
10.4012/dmj.28.433subject
Has Abstractpub_date
2009-07-01 00:00:00pages
433-7issue
4eissn
0287-4547issn
1881-1361pii
JST.JSTAGE/dmj/28.433journal_volume
28pub_type
杂志文章abstract::The relation between the bonding efficacy of the dentin adhesive and the physical change of the dentin after treatment with various dentin cleansers was investigated. The dentin surface was cleaned with one of the seven experimental dentin cleansers, 5, 10, 20, 30 and 40% of the phosphoric acid, neutralized 0.5 M EDTA...
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journal_title:Dental materials journal
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abstract::Ag-Pd-Cu-Au alloy was subjected to a Thermo-Mechanical Analyzer to investigate high temperature properties up to its liquidus temperature. Microstructural examination and elemental analysis with EPMA were also conducted in the solid/liquid mixture region. The following conclusions were obtained. (1) The solidus temper...
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journal_title:Dental materials journal
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journal_title:Dental materials journal
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更新日期:2012-01-01 00:00:00
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journal_title:Dental materials journal
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更新日期:2008-03-01 00:00:00
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更新日期:2009-09-01 00:00:00