Description
Ultimate Dental Lab provides carefully crafted full-contour zirconia crafted with the use of state-of-the-art technology. Our FCZ restorations offer the highest flexural strength of any all-ceramic options. Our team utilizes digital dentistry to ensure every full-contour zirconia crown or bridge is fabricated to have a perfectly smooth surface, which eliminates abrasion against natural dentition. Our full-contour zirconia crown and bridge restorations do not contain metal and are 100% biocompatible. These restorations have the highest flexural strength of any all-ceramic option and are also extremely gentle on opposing dentition.
Indications
Full-contour zirconia is so versatile, it can be used in almost any situation from singles, bridges with any combination of abutments and pontics, inlay bridges and screw-retained implants. Also an esthetic alternative to a PFM with metal occlusion due to limited space.
Contraindications
When esthetic expectations are high and it is important that the restorations match surrounding natural dentition or other existing restorations. If bonding is necessary to retain the restoration, bond strength is weaker and less predictable than other ceramics.
Preparation
Shoulder preparation not needed. A mild chamfer or a feather-edge margin is good. 1mm buccal, lingual, and occlusal reduction is ideal, but can go to .5mm in some areas when reduction is limited. Minimum occlusal reduction of 0.5 mm; 1 mm is ideal. Adjustments and polishing: Adjust full-contour zirconia crowns and bridges using water and air spray to keep the restoration cool and to avoid microfractures with a fine grit diamond. If using air only, use the lightest touch possible when making adjustments. A football-shaped bur is the most effective for occlusal and lingual surfaces (on anterior teeth); a tapered bur is the ideal choice for buccal and lingual surfaces. Polish full-contour zirconia restorations with the porcelain polishing system of your choice.
Cementation
It is recommended that full-contour zirconia be cemented using a zirconia primer like Z-Prime from Bisco or Clearfil Ceramic Primer from Kuraray. Alternatively, a resin reinforced glass ionomer such as RelyX Luting cement can also be used. When a greater bond is needed due to the lack of a retentive preparation, use a resin cement like RelyX Unicam or RelyX Ultimate. Before cementing all full-contour zirconia crowns, the interior surface of the crown needs to be cleaned with Ivoclean (Ivoclar Vivadent – Amherst, NY). This is critical in assuring maximum bond strength.
Tech Notes
Advantage Z has a flexural strength of 700-750 MPa, making it an excellent choice for the posterior.
Simple Z has a flexural strength of 750-800 MPa, making it an excellent choice for both the anterior and posterior.
MPa (Megapascal) is the unit by which the amount of pressure an object can withstand is measured. A natural tooth’s flexural strength is measured at 305 MPa for a molar and 248 MPa for a premolar.
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