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Full-Contour Zirconia
Nakanishi offers three high-quality full-contour zirconia restorations that are ideal for both posterior and anterior cases. After years of exhaustive research and development, we have selected three zirconia solutions that offer superior results. Our team is made of Certified Dental Technicians and industry experts who carefully craft every zirconia crown and bridge to perfectly meet the needs of each patient. We utilize superior zirconia materials that ensure seamless esthetics and minimal wear to opposing dentition.
ZirCAD Zirconia
Monolithic 3Y zirconia, offers the highest strength.
ArgenZ HT Zirconia
Multilayer 4Y zirconia for a balance of high strength and esthetics.
ArgenZ ST
Multilayer 5Y zirconia, offers the highest translucency and esthetics of our zirconia options.
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, Maryland type 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.
Preparation
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
Full-contour zirconia may be cemented using a resin reinforced glass ionomer such as RelyX Luting cement. When a greater bond is needed due to the lack of a retentive preparation, use 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
Solid zirconia requires a cast gold type preparation. If adjustments are needed, use zirconia specific diamonds and rubber wheels polishing with diamond paste.
ADA Insurance Codes
- D2740 Crown – Porcelain/Ceramic Substrate
- D6245 Pontic Porcelain/Ceramic
- D6740 Abutment Crown Porcelain/Ceramic