Conclusion. Multilayered Zirconia components developed with different yttria contents by layer have lower flexural toughness than those made with gradient shade technological know-how and the identical yttria written content for each layer. Consequently, various factors like the form of prostheses, nesting strategies of prostheses within the zirconia disc, and the https://www.directivepublications.org/journal-of-dentistry-and-oral-research/