Layered Zirconia

Layered Zirconia

Layered zirconia restorations are an excellent alternative to PFM crowns. These crowns are crafted by layering esthetic ceramic over a zirconia substructure. They provide the strength of PFM crowns while eliminating esthetic challenges, such as discoloration or the dark line that can appear along the gum-line. Through the use of advanced CAD/CAM technology, they provide a consistently accurate fit. Due to zirconia's natural translucency, these crowns are warmer and provide superior lifelike coloration when compared to their PFM counterparts.

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Indications

A CAD/CAM substitute for traditional PFM, our porcelain-fused-to-zirconia can be used for anterior and posterior crowns, crowns over implants, and bridges of up to fourteen units.

  • Attachment cases
  • Cases with less than 1 mm clearance
  • Bruxism
  • Patients who have broken a PFM crown
  • Cases that require bonding

The ideal preparation for PFZs is a chamfer margin preparation. If a porcelain labial margin is prescribed, then a shoulder margin preparation is required. Feather-edge margin preparations are indicated for full-cast restorations.

  • Resin Ionomer cement (RelyX or RelyX Unicem, 3M ESPE)
  • Maxcem Elite (Kerr)
  • Panavia F 2.0 (Kuraray) - ideal for short, tapered preparations
  • Glass ionomer cement (GC Fuji, GC America)

If an adjustment is required on the ceramic, use a fine diamond with water and air to keep the crown cool. To contour the ceramic, polish with a pink rubber wheel and diamond polishing paste (Brasseler, Shofu, Vident).

  • D2740 Crown - porcelain / ceramic substrate