The Effect of Various Mixing Techniques on the Push-Out Bond Strength of Calcium Enriched Mixture

Statement of the problem: correct proportioning and mixing are essential to ensure cements attain their optimum physical properties. purpose: the aim of this experimental study was to evaluate the influence of various mixing techniques including manual, mechanical mixing, and ultrasonic vibration on push-out bond strength of calcium enriched mixture (cem). materials and method: ninety 2-mm-thick dentin disks were prepared from singlerooted human teeth and filled with cem mixed with manual, trituration, or ultrasonic methods. push-out bond strength values of the specimens were measured by a universal testing machine after 3 and 21 days. the samples were then examined under a stereomicroscope at 40× magnification to determine the nature of bond failure. data were analyzed by kruskal-wallis and mann-whitney test. (p< 0.05) results: the highest (7.59 mpa) and lowest (4.01 mpa) bond strength values were recorded in conventional method (after 21 days) and trituration method (after 3 days), respectively. there was no statistically significant difference between the three techniques in 3 and 21 days. conclusion: according to the results, various mixing techniques had no effect on the push-out bond strength of cem cement.