Effect of design of prefabricated post heads on core materials

This study investigated post-core adaptation as it relates to core materials and post-head configuration. A total of 360 samples that consisted of three prefabricated post systems and three core materials of amalgam and composite resin of 1 and 3 mm post-head-covering thicknesses were made. Composite resin with a post-head covering of 3 mm was most resistant to compression, whereas amalgam was most resistant to retentive forces. The addition of titanium to composite resin as a reinforcement filler did not improve resistance to either compressive or tensile forces.