Forty porcelain disks were resin bonded to etched base metal surfaces to measure tensile bond strengths. One metal surface was bonded to each porcelain surface, making each test specimen "sandwiched", with a porcelain disk between two metal surfaces. The mean bond strength values of the Conclude group was 3017 +/- 869 psi. The mean for the Mar-Bond group was 3747 +/- 693 psi, and the mean for the two Chameleon groups combined was 3172 +/- 544 psi. No two groups were significantly different.
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