Microtensile bond strength of lithium disilicate to zirconia with the CAD-on technique.
J Prosthodont
; 24(3): 188-93, 2015 Apr.
Article
em En
| MEDLINE
| ID: mdl-25850949
PURPOSE: Recently, a novel technique was introduced to combine lithium disilicate and zirconia into one restoration. The purpose of this study was to compare the microtensile bond strength of veneering ceramic to a zirconia core in two techniques: the e.max® CAD-on technique and the Press-on technique. MATERIALS AND METHODS: Group A was prepared by veneering sintered zirconia blocks (e.max® ZirCAD) with lithium disilicate blocks (e.max® CAD) using the CAD-on technique according to manufacturer's instructions. Group B was prepared by taking sintered e.max® ZirCAD blocks and veneering them with fluorapatite glass-ceramic (e.max® ZirPress) using the Press-on technique according to manufacturer's instructions. Each block was loaded in a dynamic cyclic loading machine. The blocks were then sectioned into 1 × 1 mm(2) beams (n = 43) using a precision saw, thermocycled, and loaded in tension until failure on a universal testing machine. A mean and standard deviation were determined per group. Data were analyzed using an unpaired t-test (α = 0.05). RESULTS: The mean microtensile bond strengths were 44.0 ± 13.8 MPa for the CAD-on technique and 14.9 ± 8.8 MPa for the Press-on technique. Significant differences were found between the two groups (p = 2.7E-19). CONCLUSIONS: The CAD-on technique (lithium disilicate/zirconia) resulted in greater microtensile bond strength than the Press-on technique (fluorapatite glass-ceramic/zirconia).
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Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Prostodontia
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Zircônio
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Planejamento de Prótese Dentária
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Porcelana Dentária
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Análise do Estresse Dentário
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Facetas Dentárias
Idioma:
En
Revista:
J Prosthodont
Assunto da revista:
ODONTOLOGIA
Ano de publicação:
2015
Tipo de documento:
Article
País de publicação:
Estados Unidos