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Effect of Recast Cobalt Chrome Base Metal Alloy on Flexural Bond Strength of Metal Ceramic Restoration
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A
BSTRACT
Aim:
The aim of this study was to assess and compare the outcome of recasting of CoCr alloy on the metal ceramic flexural bond strength.
Materials and Methods:
50 resin patterns were fabricated and divided into 5 equal groups and casted as: Group 1 containing 0%, Group 2 containing 20%, Group 3 containing 30%, Group 4 containing 40%, and Group 5 containing 100% recast alloy. They were layered with VITA VMK 68 porcelain powder and put through to 3-point bending test using Universal Testing Machine. Data obtained was statistically analyzed using one-way ANOVA which was followed by Tukey honest significant difference
post hoc
test (α = 0.05).
Results:
A reduction in bond strength was noted as the percentage of recast alloys were increased. Group 5 showed a notable reduction (
P
< 0.001) in bond strength compared to other groups as it was performed on 100% recast alloys.
Conclusions:
Metal ceramic flexural bond strength reduced as the percentage of one-time used alloy increased. 40% of once used alloy can be considered safe to achieve optimal bond strength.
Ovid Technologies (Wolters Kluwer Health)
Title: Effect of Recast Cobalt Chrome Base Metal Alloy on Flexural Bond Strength of Metal Ceramic Restoration
Description:
A
BSTRACT
Aim:
The aim of this study was to assess and compare the outcome of recasting of CoCr alloy on the metal ceramic flexural bond strength.
Materials and Methods:
50 resin patterns were fabricated and divided into 5 equal groups and casted as: Group 1 containing 0%, Group 2 containing 20%, Group 3 containing 30%, Group 4 containing 40%, and Group 5 containing 100% recast alloy.
They were layered with VITA VMK 68 porcelain powder and put through to 3-point bending test using Universal Testing Machine.
Data obtained was statistically analyzed using one-way ANOVA which was followed by Tukey honest significant difference
post hoc
test (α = 0.
05).
Results:
A reduction in bond strength was noted as the percentage of recast alloys were increased.
Group 5 showed a notable reduction (
P
< 0.
001) in bond strength compared to other groups as it was performed on 100% recast alloys.
Conclusions:
Metal ceramic flexural bond strength reduced as the percentage of one-time used alloy increased.
40% of once used alloy can be considered safe to achieve optimal bond strength.
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