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The effect of thermal cycling on metal-ceramic bond strength


Fischer, J; Zbären, C; Stawarczyk, B; Hämmerle, C H F (2009). The effect of thermal cycling on metal-ceramic bond strength. Journal of Dentistry, 37(7):549-553.

Abstract

OBJECTIVES: The aim was to evaluate the effect of thermal cycling on the metal-ceramic bond strength. METHODS: Four different noble metal alloys were used. Specimens for the crack initiation test according to ISO 9693 were prepared to assess metal-ceramic bond strength (n=10). The metal substrates were either air-borne particle abraded or polished prior to veneering. Bond strength was measured after veneering or after 6000 thermal cycles. With one alloy in addition long-term thermal cycling with 15,000 and 50,000 cycles was carried out. Statistical analysis was performed with one-way ANOVA followed by a post hoc Bonferroni test. RESULTS: Polished metal substrates showed a significantly lower bond strength compared to the air-borne particle abraded substrates. Treatment with 6000 thermal cycles did not significantly reduce the bond strength. Long-term thermal cycling resulted in an exponential decrease of bond strength for both polished and air-borne particle abraded specimens. CONCLUSIONS: Air-borne particle abrasion significantly increases metal-ceramic bond strength. Thermal cycling of metal-ceramic composites results in an exponential decrease of bond strength. The crack initiation test is a sensitive method for assessing the metal-ceramic bond strength.

Abstract

OBJECTIVES: The aim was to evaluate the effect of thermal cycling on the metal-ceramic bond strength. METHODS: Four different noble metal alloys were used. Specimens for the crack initiation test according to ISO 9693 were prepared to assess metal-ceramic bond strength (n=10). The metal substrates were either air-borne particle abraded or polished prior to veneering. Bond strength was measured after veneering or after 6000 thermal cycles. With one alloy in addition long-term thermal cycling with 15,000 and 50,000 cycles was carried out. Statistical analysis was performed with one-way ANOVA followed by a post hoc Bonferroni test. RESULTS: Polished metal substrates showed a significantly lower bond strength compared to the air-borne particle abraded substrates. Treatment with 6000 thermal cycles did not significantly reduce the bond strength. Long-term thermal cycling resulted in an exponential decrease of bond strength for both polished and air-borne particle abraded specimens. CONCLUSIONS: Air-borne particle abrasion significantly increases metal-ceramic bond strength. Thermal cycling of metal-ceramic composites results in an exponential decrease of bond strength. The crack initiation test is a sensitive method for assessing the metal-ceramic bond strength.

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Additional indexing

Item Type:Journal Article, refereed, original work
Communities & Collections:04 Faculty of Medicine > Center for Dental Medicine > Clinic for Fixed and Removable Prosthodontics
Dewey Decimal Classification:610 Medicine & health
Language:English
Date:July 2009
Deposited On:04 Jan 2010 10:49
Last Modified:05 Apr 2016 13:39
Publisher:Elsevier
ISSN:0300-5712
Publisher DOI:https://doi.org/10.1016/j.jdent.2009.03.014
Related URLs:http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6T86-4W4JR5W-2&_user=5294990&_rdoc=1&_fmt=&_orig=search&_sort=d&_docanchor=&view=c&_acct=C000049009&_version=1&_urlVersion=0&_userid=5294990&md5=67bf76b9f21d7040e289d72a3196e1fa (Publisher)
PubMed ID:19398257

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