Metal-ceramic bond strength.
No currently available bond test for dental metal ceramic systems has yet gained general acceptance. Such a bond test cannot be established without careful analysis of the stress distribution within the adherence region. The objective of the present study was to establish a mechanical shear stress test and combine the results with a finite element stress analysis of an idealized crown to enable comparisons of different metal-ceramic systems. The titanium-ceramic systems tested, both machined and cast titanium, showed higher shear strength values than the high gold-ceramic system used as a reference. Since the latter system has been used successfully in the clinic for many years, it seems reasonable to assume that the bond strength of titanium-ceramic systems is quite satisfactory for dental crown-and-bridge work. In conclusion, the interfacial bond strength test proposed in the present study should be applicable to all of the currently known material combinations in which a brittle fracture might be expected to occur.
Persson
M
M
Nobelpharma AB, Procera Research & Development, Göteborg, Sweden.
Bergman
M
M
D002516:Ceramics / Q000737:chemistry*; D003442:Crowns; D003722:Dental Alloys / Q000737:chemistry; D001840:Dental Bonding; D003734:Dental Casting Investment / Q000737:chemistry; D019232:Dental Restoration Failure; D003829:Denture, Partial; D006047:Gold Alloys / Q000737:chemistry; D008422:Materials Testing; D016876:Metal Ceramic Alloys / Q000737:chemistry*; D008962:Models, Theoretical; D013314:Stress, Mechanical; D013718:Tensile Strength; D014025:Titanium / Q000737:chemistry
D003722:Dental Alloys; D003734:Dental Casting Investment; D006047:Gold Alloys; D016876:Metal Ceramic Alloys; D014025:Titanium