Porcelain Fused to Engineered Zirconia

Over the years, Zirconia has proven to be sufficiently strong when used as a core material. However, due to a number of differences in the handling characteristics of zirconia versus metal alloys, the structural makeup of veneering porcelain is significantly different. As a result, while zirconia porcelain is very esthetic and kind to opposing dentition, it does have a fracture toughness that is 33% lower than porcelain used for PFMs. Therefore, copings and frameworks that provide optimal porcelain support are crucial to the durability of zirconia-reinforced restorations. Clinical studies, as well as our own observations based on 50,000+ units fabricated over the past 15 years, reveal that there is a higher incidence of chipping of the veneering porcelain with these restorations.

Indications & Recommendations

Although many manufacturers advocate the use of porcelain fused to zirconia restorations in all areas of the mouth, we recommend restricting their use to single crowns and 3-unit bridges in the anterior region. Cases involving posterior teeth can only be recommended with prior case consultation and evaluation.


ZCore+ restorations can be conventionally cemented with your crown and bridge cement of choice. Due to its crystalline structure, zirconia crowns cannot be etched and therefore cannot be adhesively bonded. For increased adhesion through chemical bonding, Multilink® Automix by Ivoclar is recommended.


All restorations are manufactured in our laboratory in Corvallis, Oregon under our ISO 9001:2015 and DAMAS Quality Management System guidelines. This ensures your patients consistently receive only the highest quality restorations. Production time is seven working days in the laboratory. Multilink® is a registered trademark of Ivoclar Vivadent, Inc.

Additional Resources

Our crown and bridge technical support team of Tony and Craig are available for case consultations. Call 1.800.445.5941 and ask for them, or request a call on your Rx.

Information regarding shade communication and shade photography.

Shade photos can be emailed to shade@obriendentallab.com.



“ZCore+ is a great alternative to anterior porcelain to metal restorations. I would recommend them for anterior crowns and bridges with the most demanding esthetic requirements.”

Karli Luksch, CDT | Senior Team Leader

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