Zirconia Restoration Guide

 

The following information may be helpful in understanding the best applications of our zirconia restorations.  These popular restorations continue to evolve in tandem with technology and industry demands.  As a note, we use only the highest quality materials from the best manufacturers in the world.  Our reputation and yours demand it.

1. Zenostar®. (monolithic zirconia by Wieland) This monolithic zirconia restoration is CAD designed and milled to exacting tolerances in our Bellevue laboratory.  Select Zenostar® for its precision fit, high flexural strength (1200 MPa), tooth shade and cementable quality.

Indications: Perfect for molar use and bridges up to five units.  Cementable over most dark stump shades and metal implant abutments with minimal bleed through.
Contra-indications: Not typically suitable in the anterior region due to limited translucency and exacting shade control.
Preparation: 1mm minimal reduction occlusally, axially with .8mm champher margins preferred for best fits.
Seating: Cementable with any conventional crown and bridge cement, and bondable to a limited degree.

2. Zenostar® Layered. (monolithic zirconia by Wieland layered with Ivoclar e.max®) This is a full Zenostar® restoration with e.max® enamel layered in the facial (incisal/buccal) aesthetic areas only.  This restoration is designed for use when exceptional fit and the strength of Zenostar® is desired but esthetic demands are higher.

Indications: Prescribe for canines to premolars, and upper first molars, and up to five-unit bridges. Can be mixed with full Zenostar® units.
Contra-indications: Not as suitable in the anterior region as e.max® or Imagine™ due to the opaque dentin.
Preparation: 1mm minimal reduction occlusally and axially with 1.3mm reduction in the facial incisal region where the e.max enamel will be placed. Champher margins preferred for best fits.
Seating: Cementable with any conventional crown and bridge cement, and bondable to a limited degree.

3. Traditional Zirconia. (zirconia coping with layered porcelain) This is a traditional zirconia coping with hand stacked porcelain.

Indications: Best suited in the anterior when esthetic demands are high but the stump shade is too dark for e.max®. Also suitable for use in small three-unit anterior bridgework.
Contra-indications: Due to the relatively low strength of layering porcelain for zirconia, we do not recommend this zirconia restoration in the molar region.
Preparation: 1.5mm minimal reduction occlusally, axially with champher margins preferred for best fits.
Seating: Cementable with any conventional crown and bridge cement, and bondable to a limited degree.

4. Imagine™ High Translucency Zirconia. (monolithic zirconia/alumina blend by Jensen Dental) This is our newest zirconia offering which features the fit of Zenostar® but the translucency of e-Max®.  Imagine™ is CAD designed and milled with nearly twice the flexural strength of e-max® at 769 MPa.  Imagine™ is well suited for all full coverage posterior teeth and many anterior multiple crowns (shade dependant).

Indications: This restoration is ideal for all molars and premolars when the stump shade is not too dark.  Also for use in small three unit bridge work.
Contra-indications: We do not recommend this monolithic zirconia restoration for single anterior teeth where layered e.max® can be used.
Preparation: 1.5mm minimal reduction occlusally, 1mm to axially with champher margins .8mm preferred for best strength and fits.
Seating: Cementable with any conventional crown and bridge cement, although the translucency may allow some cement shades to affect the final crown shade.
 

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