Micro-Layered Zirconia Restoration

Zirconia has the highest flexural strength and fracture toughness of any tooth colored material used in dentistry. Its optical properties generally limit it to posterior restorations. However, in an effort to increase its indications, manufacturers have modified the chemical composition to increase the translucency of the material. This has reduced its physical properties. Rather than utilize these weaker versions of zirconia in the name of esthetics, we have developed a restoration that improves the esthetics of monolithic zirconia without compromising its advantages. We call it Micro-Layered Zirconia. It consists of a zirconia crown or bridge that has been designed to have a thin layer of porcelain applied to the visible, non-functional surfaces of the restoration.

Indications & Recommendations

Micro-Layered Zirconia is indicated for crowns and bridges anywhere in the mouth.

Adjustments

Occlusal*: In order to maintain the extremely smooth occlusal surface of polished zirconia, care must be taken when making occlusal adjustments. For minor occlusal adjustment, it is recommended to adjust the opposing tooth. If that is not possible, the Oral Adjustment and Polishing Kit provides the necessary instruments for reducing zirconia. To properly polish zirconia, the restoration must be polished with a diamond polishing paste.

Internal: For minor adjustments, it is recommended to adjust the preparation. If the internal aspect must be altered, a sharp diamond with irrigation is recommended to minimize the generation of heat.

Cementation

Micro-Layered Zirconia 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.

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