scholarly journals Effect of recasting percentage of base metal alloys on the metal-ceramic bond strength

2017 ◽  
Vol 13 (3) ◽  
pp. 51-54
Author(s):  
Ayşe Gözde Türk
Keyword(s):  
Bond Strength ◽  
Base Metal ◽  
Metal Alloys ◽  
Ceramic Bond ◽  
Metal Ceramic

scholarly journals Evaluation of the Effect of recasting Nickel–chromium Base Metal Alloy on the Metal–ceramic Bond Strength: An in vitro Study

2017 ◽  
Vol 18 (9) ◽  
pp. 837-841
Author(s):  
T Meenakshi ◽  
Munagapati Bharathi ◽  
Jayasree Komala
Keyword(s):  
Bond Strength ◽  
Base Metal ◽  
Metal Alloy ◽  
Bending Test ◽  
Chromium Alloy ◽  
Nickel Chromium ◽  
Ceramic Bond ◽  
Metal Ceramic ◽  
Base Metal Alloy

ABSTRACT Aim The aim of this study was to evaluate the effect of recasting base metal alloy on the metal–ceramic bond strength. Materials and methods A total of 60 test samples were prepared from new and recast nickel–chromium alloy and divided into six groups. In group A0, test samples were prepared from 100% new alloy. Groups A1, A2, A3, A4, and A5 were prepared from 50% new alloy and 50% casting remnants (sprue and buttons) of the previous group by weight. All these samples were coated with ceramic (IPS d.SIGN and Ivoclar-Vivadent), and samples were then subjected to three-point bending test to evaluate metal–ceramic bond strength. Results The values were analyzed using one-way analysis of variance and Tukey's post hoc test. The mean bond strength of group A0 was higher than that of groups A1, A2, A3, A4, and A5. Conclusion Metal–ceramic bond strength decreased significantly with multiple recastings. Clinical significance Bond strength between metal and ceramic is a crucial factor for the clinical performance of metal–ceramic restorations. Recasting of alloys may affect the metal oxide layer composition and thickness of metal–ceramic interface, and thereby the metal–ceramic bond. How to cite this article Meenakshi T, Bharathi M, Komala J. Evaluation of the Effect of recasting Nickel–chromium Base Metal Alloy on the Metal–ceramic Bond Strength: An in vitro Study. J Contemp Dent Pract 2017;18(9):837-841.

Effect of two opaquing techniques and two metal surface conditions on metal-ceramic bond strength

1995 ◽  
Vol 74 (1) ◽  
pp. 8-17 ◽  
Author(s):  
Philip C. Rake ◽  
Charles J. Goodacre ◽  
B. Keith Moore ◽  
Carlos A. Munoz
Keyword(s):  
Bond Strength ◽  
Metal Surface ◽  
Surface Conditions ◽  
Ceramic Bond ◽  
Metal Ceramic

scholarly journals Correlation between metal-ceramic bond strength and coefficient of linear thermal expansion difference

2009 ◽  
Vol 17 (2) ◽  
pp. 122-128 ◽  
Author(s):  
Stella Crosara Lopes ◽  
Valéria Oliveira Pagnano ◽  
João Manuel Domingos de Almeida Rollo ◽  
Mônica Barbosa Leal ◽  
Osvaldo Luiz Bezzon
Keyword(s):  
Thermal Expansion ◽  
Bond Strength ◽  
Linear Thermal Expansion ◽  
Ceramic Bond ◽  
Metal Ceramic

scholarly journals Mechanical Properties and Metal-Ceramic Bond Strength of Co-Cr Alloy Manufactured by Selective Laser Melting

Materials ◽  
2020 ◽  
Vol 13 (24) ◽  
pp. 5745
Author(s):  
Joon-Ki Hong ◽  
Seong-Kyun Kim ◽  
Seong-Joo Heo ◽  
Jai-Young Koak
Keyword(s):  
Mechanical Properties ◽  
Elastic Modulus ◽  
Flexural Strength ◽  
Yield Strength ◽  
Bond Strength ◽  
Selective Laser Melting ◽  
Laser Melting ◽  
Three Point Bending ◽  
Ceramic Bond ◽  
Metal Ceramic

Cobalt–chromium (Co-Cr) metal is one of the widely used biomaterials in the fabrication of dental prosthesis. The purpose of this study was to investigate whether there are differences in the properties of metals and bond strength with ceramics depending on the manufacturing methods of Co-Cr alloy. Co-Cr alloy specimens were prepared in three different ways: casting, milling, and selective laser melting (SLM). The mechanical properties (elastic modulus, yield strength, and flexural strength) of the alloys were investigated by flexure method in three-point bending mode, and microstructures of the specimens were analyzed. After application of the veneering ceramic through the three-point bending test, bond strength of the Metal-Ceramic was investigated. The cracked surfaces were observed by means of energy dispersive X-ray (EDX) spectroscopy and scanning electron microscopy (SEM) with backscattered electron (BSE) images. In mechanical properties, the elastic modulus was highest for the casting group, and the yield strength and flexural strength were lowest for the milling group. The SLM group showed finer homogeneous crystalline-microstructure, and a layered structure was observed at the fractured surface. After the ceramic bond strength test, all groups showed a mixed failure pattern. The casting group showed the highest bond strengths, whereas there was no significant difference between the other two groups. However, all groups have met the standard of bond strength according to international standards organization (ISO) with the appropriate passing rate. The results of this study indicate that the SLM manufacturing method may have the potential to replace traditional techniques for fabricating dental prosthesis.

Reducing the alloy thickness of base metal ceramic restorations

2009 ◽  
Vol 1 (2) ◽  
pp. 25-29
Author(s):  
Andre Rayne Le Roux
Keyword(s):  
South Africa ◽  
Base Metal ◽  
Noble Metal ◽  
Metal Alloy ◽  
Metal Alloys ◽  
Modulus Of Rupture ◽  
Metal Ceramic ◽  
Ceramic Restorations ◽  
Noble Metal Alloys ◽  
Base Metal Alloy

Reduction in base metal alloy thickness will permit additional porcelain depth and improved aesthetics but unfortunately little information exists regarding the thickness to which base metal alloys may be reduced in comparison to noble metal alloys for metal ceramic restorations. Even with comparison of noble metal alloys the aesthetic benefits are restricted to improving aesthetics in base metal restoration further, since noble metal alloys are generally regarded as providing superior aesthetics to base metal restorative alloys. Purpose: The objective of this study was to determine whether a significant reduction in thickness could be achieved using a base metal alloy as compared to a noble metal alloy and the thickness to which base metal alloy substructures could safely be reduced while still providing the same resistance to fracture of the porcelain. Material and methods: Tensile strength tests (N) of the modulus of rupture of the porcelain were performed on 40 base metal alloy (Wiron 99, Bego, Germany) and 12 noble metal alloy rectangular specimens (5.8 mm wide and 15.0 mm long) bonded to a standardized 1.0 mm thickness of dentine Creation porcelain. The base metal alloy thickness varied in 0.1mm increments from 0.1 to 0.4 mm. The results were compared to 12 noble metal alloy (Bio Y 81, Argen, South Africa) specimens of recommended minimum thickness (0.3 mm). Data for the results was obtained using a universal tensile testing instrument, which was set to operate at a cross head speed of 0.5mm (Instron Mini 44, Instron corporation U.S.A). The applied force (N) that measured the modulus of rupture of each specimen was printed from a computer connected to the Instron Mini 44 that operated on a 95% level of confidence. Instron Agents (Durban, South Africa) performed the calibration and setting up of the machine prior to testing the specimens. Results: The results indicated a permissible 33.33% reduction in the base metal alloy specimens as compared to the noble metal alloy control specimens. This was deduced from the reduction in alloy thickness of up to 0.2 mm for base metal alloy specimens as compared to the 0.3 mm noble metal alloy specimens. The recommended thickness to which the base metal alloys could be reduced without distortion of the alloy was also 0.2 mm. The one-way ANOVA showed a level of significance of (α=05).

Sign in / Sign up

Export Citation Format

Share Document