Belastbarkeit viergliedriger Brücken aus Zirkoniumdioxid und Metallkeramik

Abstract

Load-bearing capacity of four-unit bridges with zirconia or metal frameworkZirconia frameworks for all-ceramic bridges were produced by different copymilling procedures and frameworks for porcelain-fused-to-metal bridges were cast in Co-Cr alloy. In load tests after veneering, all-ceramic bridges primarily failed by fractures of the framework, whereas the porcelain-fused-to-metal bridges failed by chipping and delamination. No significant differences were found between both types of bridges with respect to their load-bearing capacity under clinical aspects.