| Journal: | Brazilian dental journal |
| Database: | PERIÓDICA |
| System number: | 000290300 |
| ISSN: | 0103-6440 |
| Authors: | Prado, Ricardo Alves do1 Panzeri, Heitor2 Fernandes Neto, Alfredo Julio Neves, Flavio Domingues das Silva, Marlete Ribeiro da Mendonca, Gustavo |
| Institutions: | 1Universidade Federal de Uberlandia, Faculdade de Odontologia, Uberlandia, Minas Gerais. Brasil 2Universidade de Sao Paulo, Faculdade de Odontologia, Ribeirao Preto, Sao Paulo. Brasil |
| Year: | 2005 |
| Season: | Sep-Dic |
| Volumen: | 16 |
| Number: | 3 |
| Pages: | 202-206 |
| Country: | Brasil |
| Language: | Inglés |
| Document type: | Artículo |
| Approach: | Experimental, analítico |
| English abstract | The continuous technological advance and increasing availability of new base metal alloys and ceramic systems in the market, coupled to the demands of daily clinical practice, have made the constant evaluation of the bond strength of metal/porcelain combinations necessary. This study evaluated the metal/porcelain shear bond strength of three ceramic systems (Duceram, Williams and Noritake) in combination with three nickel-chromium (Ni-Cr) alloys (Durabond, Verabond and Viron). Thirty cast cylinder specimens (15 mm high; 6 mm in diameter) were obtained for each alloy, in a way that 10 specimens of each alloy were tested with each porcelain. Bond strength was measured with an Emic screw-driven mechanical testing machine by applying parallel shear forces to the specimens until fracture. Shear strength was calculated using the ratio of the force applied to a demarcated area of the opaque layer. Mann-Whitney U test was used for statistical analysis of the alloy/ceramic combinations (p<0.05). Viron/Noritake had the highest shear bond sregnth means (32.93 MPa), while Verabond/Duceram (16.31 MPa) presented the lowest means. Viron/Noritake differed statistically from other combinations (p<0.05). Viron/Duceram had statistically significant higher bond strengths than Verabond/Duceram, Verabond/Williams and Durabond/Noritake (p<0.05). It was also found significant difference (p<0.05) between Verabond/Noritake, Verabond/Duceram and Durabond/Noritake. No statistically significant difference (p>0.05) were observed among the other c |
| Disciplines: | Medicina |
| Keyword: | Odontología, Porcelana, Aleaciones metálicas, Interfase, Fuerza de retención |
| Keyword: | Medicine, Dentistry, Porcelain, Metal alloys, Interface, Shear bond strength |
| Full text: | Texto completo (Ver HTML) |
