A metal-free dentistry has long been the dream of all practitioners. However, the inherent fragility, low flexural strength, as well as the low fracture resistance of ceramics were the main obstacles slowing the use of these materials. To overcome this weakness, researchers and manufacturers have developed advanced formulas to prevent the propagation of cracks in the ceramic using mainly yttria-tetragonal zirconia polycrystal (Y-TZP), commonly known as "zirconia". However, despite their resistance to mechanical tests, zirconia frameworks can still be fragile if their properties are not well studied, and the requirements for handling them are not met. To succeed zirconia frameworks, several requirements need to be known, respected and applied.
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