PFZ
At PM Newton Dental Ceramics Dental, we provide a range of PFZ crowns that bring together the strength of a metal crown with the realistic beauty and opalescence of zirconia.
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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 unit
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Contraindications
Attachment cases
Cases with less than 1 mm clearance
Bruxism
Patients who have broken a PFM crown
Cases that require bonding
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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.
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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)
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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).
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Codes
D2740 Crown – porcelain / ceramic substrate