Effect of thermal and mechanical aging on flexural strength of zirkonzahn and mamut zirconia ceramics

ABSTRACT

Objective: Despite the high strength of zirconia restorations, aging in the oral environment and masticatory loading may result in transformation of tetragonal to monoclinic phase and decrease their strength. Statements in this regard are controversial. This study sought to compare the flexural strength [FS] of Zirkonzahn [ZirkonZahn, Cercon, Ceramill] and Mamut [Dubai Medical Equipment LLC, Dubai, UAE] zirconia ceramics and assess the effect of thermal and mechanical aging on their FS