2002
DOI: 10.1177/154405910208100509
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Comparative Microstructural Study of the Diffusion Zone between NiCr Alloy and Different Dental Ceramics

Abstract: To compare a number of materials for extracoronal restoration of teeth with particular reference to CAD-CAM ceramics. CASE DESCRIPTION AND TREATMENT CARRIED OUT: This paper will be illustrated using clinical examples of patients treated using different ceramic restorations to present the advantages and disadvantages and each technique. The different requirements of tooth preparation, impression taking and technical procedures of each system will be presented and compared. PATIENT PROGRESS: Follow up clinical o… Show more

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Cited by 30 publications
(27 citation statements)
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“…The mechanical retention depends on the superficial roughness and contributes for the increase of the area of reactions, promoting higher wetting of ceramic to the metal (10). In spite of this, the chemical bond represents the main factor of adhesion in the metal-ceramic systems (11) and it is directly related to the formation of an adherent oxide layer on metal surface (5,12). The composition and thickness of this layer can be determinant for the success of the metal-ceramic bond and they depend on the technique and the materials used in the system.…”
Section: Effect Of Casting Atmosphere On the Shear Bond Strength Of Amentioning
confidence: 99%
“…The mechanical retention depends on the superficial roughness and contributes for the increase of the area of reactions, promoting higher wetting of ceramic to the metal (10). In spite of this, the chemical bond represents the main factor of adhesion in the metal-ceramic systems (11) and it is directly related to the formation of an adherent oxide layer on metal surface (5,12). The composition and thickness of this layer can be determinant for the success of the metal-ceramic bond and they depend on the technique and the materials used in the system.…”
Section: Effect Of Casting Atmosphere On the Shear Bond Strength Of Amentioning
confidence: 99%
“…Hegedus je utvrdio da taj tanki oksidni sloj Cr2O3 predstavlja difuzionu barijeru između legure i staklaste faze keramike. Na visokoj temperaturi (temperaturi pečenja keramike), je moguć prolaz metalnih i keramičkih komponenti kroz tu barijeru, i nastanak metal-keramičkog međuspoja [3]. Yilmaz smatra da je prevelika količina hroma u međuspoju nepovoljna, jer hrom-oksid nije dovoljno adherentan u odnosu na leguru [44].…”
Section: Wwwtmgorgrsunclassified
“…U toku sinterovanja keramike on difunduje ka leguri i meša se sa metalnim oksidima stvarajući metal međuspoj putem jonskih i kovalentnih veza. Takva difuzija važi i za ostale okside iz keramike [37].…”
Section: Wwwtmgorgrsunclassified
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“…O sucesso do sistema metalocerâmico depende especialmente da estabilidade da união [10,11], que ocorre por microrretenção mecânica, ligações tipo van der Waals e, especialmente, pela interação química da camada superficial de óxidos metálicos com a porcelana [2,5,11,14,15]. Os óxidos da superfície metálica são indispensáveis à aderência [7,16,17]. A formação de uma camada muito fina de óxidos é freqüentemente associada ao aumento dos riscos de insucesso na união metalocerâmica [11,18].…”
Section: Introductionunclassified