Evaluation of shear bond strength of porcelain to metal and zirconia cores
An in-vitro study
Keywords:
metal core, shear bond strength, zirconia coreAbstract
Aim: The aim of the study is to find out the difference between the shear bond strength values and failure pattern between the metal ceramic system and zirconia core veneering system. Materials and methods: A study was conducted to find out the difference between the shear bond strength values and failure pattern between the metal ceramic system and zirconia core veneering system. A total of 30 samples were divided into three groups. The first group contains metal core(Ni-Cr base metal-10nos), second group contains zirconia- Upcera core (10 nos) and third group contains Zirconia- Amman Girrbach core (10nos). All the cores were layered with corresponding porcelain. The specimens were stored under artificial saliva for 24 hours and were subjected to shear bond strength test using Instron Universal Testing machine (Instron, model 3382, Japan). The testing machine's computer software automatically recorded and reported the maximum load at which failure occurred.SEM study was performed to determine the type of failure. Results: The results show that the mean shear strength of group I is higher than that of group II and group III. Two-way Analysis of Variance (ANOVA) showed that there was significant difference between group I and other groups (p< 0.005).
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