Layered Zirconia

Layered Zirconia

The layered zirconia restorations from Apex are fabricated out of Crystal Zirconia and high-quality, esthetic porcelain. This restoration combines the high flexural strength of zirconia with the anterior beauty of hand-layered porcelain. Unlike traditional porcelain-fused-to-metal restorations, our layered porcelain crowns do not have any potential esthetic challenges. PFMs can often result in discoloration of the restoration or greying along the gingiva line. It is because of zirconia's natural translucency that these crowns have a warmer, lifelike coloration that will perfectly complement and blend in with your patient's preexisting dentition.

Benefits:

  • Substructure Strength up to 1,100 MPa
  • Hypoallergenic
  • Biocompatible
  • Anterior Esthetics

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.

Contraindications

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

Preparation

The ideal preparation for PFZs is a chamfer margin preparation. If a porcelain labial margin is prescribed, then a shoulder margin preparation is required.

Cementation

  • 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)

Tech Notes

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).

Codes

  • D2740 Crown - porcelain / ceramic substrate