Abstract
This review is making an overview of the behavior of the zirconia-toughened ceramic (ZTC) intended for use in the next generation of dental implants replacing zirconia (yttria-stabilized zirconia [Y-TZP]) currently in use. The new ZTCs are joining improved strength and toughness to the excellent biological behavior of TZP currently used worldwide for metal-free dental implants. Most of the Y-TZP dental implants currently in use are one-piece designs. New two-piece designs are now in the market. This design results very demanding because of the mechanical behavior of the ceramic and poses some limitations in implant diameter. Thanks to the improved strength and toughness, the new ZTCs will allow the increase in the reliability of the present implant design and the production of implants with diameter smaller than the first generation ones.
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