Journal ArticleDOI
Bonding mechanism evidence in a ceramic–nonprecious alloy system
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The present study was centered on the determination of possible adherence zone compounds in four composite ceramic-metal couples examined by x-ray energy analysis and revealed the presence of a predominant Al-Cr interaction resulting from the formation of an Al- Cr-O compound or mixed complex.Abstract:
Bonding between porcelain and dental ceramic alloys is thought to be dependent upon the establishment of a continous electron structure across the ceramicmetal interface (Pask, Proc. Procelain Enamel Inst., 33, 1, 1971). Such a structure most likely results from the compatibility of metal ions at the metal surface saturated in an oxide form with the complex oxide structure of the ceramic matrix. Reaction zone compounds are expected to play a prominent role in the strength of the ceramic–metal bonds but thus far none have been detected or identified.
The present study was centered on the determination of possible adherence zone compounds in four composite ceramic–metal couples examined by x-ray energy analysis. Elemental analysis of four couples revealed the presence of a predominant AlCr interaction resulting from the formation of an AlCrO compound or mixed oxide complex. The Cr ions were supplied by the Cr2O3 oxide layer at the metal surface and the Al was provided by the initial bonding-agent coating.read more
Citations
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Designs of bond strength tests for metal-ceramic complexes: review of the literature.
Ihab Adel Hammad,Yousef F Talic +1 more
TL;DR: Different experimental designs to evaluate bond strengths at the metal-ceramic interface are described and a predictive experimental design should minimize variables and result in the least residual interfacial stresses.
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Shear bond strength of a ceramic to Co-Cr alloys
Renato Morales Jóias,Rubens Nisie Tango,Jose Eduardo Junho de Araujo,Maria Amelia Junho de Araujo,Guilherme de Siqueira Ferreira Anzaloni Saavedra,Tarcisio José de Arruda Paes-Junior,Estevão Tomomitsu Kimpara +6 more
TL;DR: Bond strength of a dental ceramic to a Co-Cr alloy is dependent on the alloy composition, and mean bond strengths for IPS 20 and IPS 30 were significantly higher than mean bond strength for the other 4 alloys, which were not significantly different from each other.
Journal ArticleDOI
The metallurgy of Ni-Cr alloys for fixed prosthodontics
TL;DR: Ni-Cr alloys continue to be an important part of dental restorative materials and it behooves those interested to study these alloys and develop an understanding of their chemical and physical characteristics.
Journal ArticleDOI
The effect of oxidation heat treatment on porcelain bond strength in selected base metal alloys
TL;DR: This study evaluated the effect of oxidation heat treatment on the porcelain bond strength of base metal alloys and investigated composition changes that may have occurred during this process.
Journal ArticleDOI
Influence of Surface Treatment on the Shear Bond Strength of Ceramics Fused to Cobalt–Chromium
Geraldo Henrique Leão Lombardo,Renato Sussumu Nishioka,Rodrigo Othávio de Assunção e Souza,Silvia Masae de Araújo Michida,Alberto Noriyuki Kojima,Alfredo Mikail Melo Mesquita,Leonardo Buso +6 more
TL;DR: Air-particle abrasion with Al(2)O(3) improved the shear bond strength between metal and ceramics used, and ceramic and surface treatment significantly affected the mean bond strength values.
References
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Journal ArticleDOI
Nature of Adherence of Porcelain Enamels to Metals
TL;DR: Investigation of the fundamentals of the adherence of porcelain enameling indicated that good adherence is the result of metal-to-metal bonds between the atoms in the base metal and the proper metallic ions in the enamel.
Journal ArticleDOI
Microprobe Analyses of Gold-Porcelain Bonding
TL;DR: An electron microprobe analyzer was used in area and line-scanning modes at the interfaces of several types of gold-porcelain crown systems, revealing high concentrations of trace elements diffusing to the boundaries.