Traditional Hand Layered Zirconia

Nakanishi offers layered zirconia restorations as a superior alternative to traditional PFM or full cast crowns. Our team crafts these crowns by layering highly esthetic porcelain over a zirconia substructure. This restoration provides comparable strength to PFM crowns and eliminates the associated esthetic challenges that are common to metal-based options. Porcelain and zirconia are both highly esthetic and translucent, which eliminates the risk of discoloration or the dark metal appearing along the gingiva. We utilize advanced CAD/CAM technology to ensure every case is fulfilled with consistent and accurate fit.

Features

Lifelike Coloration
Natural Translucency
Eliminates Esthetic Challenges
Comparable Strength to PFMs

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. Feather-edge margin preparations are indicated for full-cast restorations.

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).

ADA Insurance Codes

D2740 Crown - porcelain / ceramic substrate