Conclusion. Multilayered zirconia elements developed with unique yttria contents by layer have decreased flexural toughness than These produced with gradient shade know-how and exactly the same yttria content for each layer. Hence, a variety of aspects like the form of prostheses, nesting procedures of prostheses inside the zirconia disc, and https://www.directivepublications.org/journal-of-dentistry-and-oral-research/