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Volume 16 , Issue 6
November/December 2003

Pages 635639

Bonding Indirect Resin Composites to Metal: Part 1. Comparison of Shear Bond Strengths Between Different Metal-Resin Bonding Systems and a Metal-Ceramic System

Haralampos Petridis, DDS, MS, PhD/Pavlos Garefis, DDS, PhD/Hiroshi Hirayama, DDS, DMD, MS/Nikolaos M. Kafantaris, DDS, PhD/Petros T. Koidis, DDS, MS, PhD

PMID: 14714844

Purpose: This laboratory study compared the shear bond strength between three indirect resin composites and a noble alloy using their respective bonding systems. Materials and Methods: One hundred twenty disks cast in a medium-gold, high-noble metal-ceramic alloy (V-Deltaloy) were divided equally into four groups and received different treatments for veneering: Conventional feldspathic porcelain (Omega) was applied on one set of specimens to be used as a control, and three indirect resin composites (Artglass, Sculpture, Targis) with their respective bonding systems were used for the other groups. The specimens were tested in a parallel shear test, half of them after 24-hour dry storage at room temperature and the rest after 10-day storage in normal saline solution at 37C and thermocycling. The fractured specimens were evaluated to determine the nature of the failure. Results: The mean shear bond strength values (in MPa), before and after wet storage and thermocycling, were 30 and 23 for the metal-ceramic group, 29 and 23 for the Artglass group, 20 and 19 for the Sculpture group, and 17 and 14 for the Targis group, respectively. The metal-ceramic and Artglass groups exhibited significantly higher bond strengths than the other two groups. All specimens, with the exception of the Sculpture group, showed a significant decrease in bond strength after wet storage and thermocycling. Conclusion: No group exceeded the shear bond strength of the metal-ceramic group, but the Artglass group with its respective metalresin bonding system exhibited similar bond strengths. The Sculpture group showed a stable bond after water storage and thermocycling. Int J Prosthodont 2003;16:635639.

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