Comparative analysis of testing methods for strength metal-ceramic joint

The study aims to perform a comparative analysis of the methods of investigating the strength of a bond between a metal substructure and facing ceramics in the aspect of their application in prosthetic material examinations. The analysis included strength tests determining the binding force between bound materials by means of point shearing, linear shearing, three-point bending and by the roller with a collar method. Design/methodology/approach Co-Cr alloy samples were blasted with 110 μm Al2O3 abrasive at a pressure of 0.25 MPa to develop the surface. The samples were then faced with ceramics. The produced connections were tested for joint strength using the point shear method, linear shear method, pull-out linear shear method, and three-point bending method. The test results were statistically analysed using the ANOVA test (α=0.05). Findings The highest strength was observed in samples subjected to the three-point bending test (M = 57.4 MPa). The lowest strength was observed in the group of samples subjected to the linear pull-out shear method (M = 24.7 MPa). It was shown that there are statistically significant differences between the average strengths in the groups (p<0.05). Research limitations/implications A literature analysis shows that many scientific methods are used to examine the bond between alloys and facing ceramics. However, there is no unequivocal information about the degree to which the test results obtained from different methods are comparable. Practical implications The analysis helps solve some of the research difficulties connected with comparing the results of tests conducted by different authors. Originality/value There is no similar comparative analysis in the literature.