KATANA Zirconia Crown (Porcelain Fused to Zirconia)
What is Noritake [KATANA] Zirconia
Zirconia,made of Yttria Stabilized Zirconium (YZ) has substantial advantages compared to other dental materials: mechanical resistance, bio-compatibility and a fracture toughness two times greater than Alumina.
Benefits of Zirconia:
Strength no longer has to be compromised to achieve extreme aesthetics. The Flexural Strength of Zirconia restorations range from 1250 MPa. Conventional precious metal ceramics restorations are at 800 MPa or less. Metal ceramics cannot compete with the aesthetics of Zirconia. It is capable of being placed anywhere in the mouth and can accommodate 3-6 unit bridges.
Why we use Noritake:
We use Noritake CZR (Cerabien ZR) porcelain, a porcelain specifically developed for making cermaic crowns in use with zirconia framework. It can be used for the posterior teeth as well as anterior due to its extremely high flexural strength. It was tested by Dr.Gordon Christensen, the bonding of porcelain to the for zirconia framework of CZR vs. other generic porcelains, and the best bond strength was with the use of CZR porcelain on the zirconia (Clinicians Report recommended material).
BruxZir (Full Contour Zirconia)
What is BruxZir Zirconia? BruxZir® Solid Zirconia is a monolithic solid zirconia restoration with no porcelain overlay. More brawn than beauty, you’ll be impressed by the esthetics of BruxZir when prescribed instead of posterior metal occlusal PFMs and full-cast metal restorations. BruxZir is virtually chip proof, making it the ideal restoration for bruxers, implant restorations and areas with limited occlusal space. Designed and milled using CAD/CAM technology, BruxZir is sintered for 6.5 hours at 1,530 degrees Celsius. The final BruxZir restoration emerges nearly chip proof and is glazed to a smooth surface.
Indications: BruxZir Solid Zirconia is indicated for crowns, bridges, implants, inlays and onlays. It is an esthetic alternative to PFM metal occlusal/lingual or full-cast restorations. The chip proof durability of BruxZir is ideal for bruxers who have broken natural teeth or previous PFM restorations. BruxZir is also ideal when the patient lacks the preparation space for a PFM.
Patient Benefits: Chip-resistant, as it is made of solid zirconia with no porcelain overlay Glazed to a smooth surface to reduce plaque accumulation.
Preparation Requirements: Shoulder preparation not needed, feather edge is okay. It is a conservative preparation similar to full-cast gold, so any preparation with at least 0.5 mm of occlusal space is accepted. Minimum occlusal reduction of 0.5 mm; 1 mm is ideal.
Instructions for Adjustment and Polishing: Adjust BruxZir zirconia crowns and bridges using water and air spray to keep the restoration cool and to avoid micro-fractures 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 BruxZir restorations with the porcelain polishing system of your choice. Or, purchase the Axis Dental BruxZir Adjustment & Polishing Set (LS-7579). Do Not Use Discs To Finish Full-Contour Zirconia.
Cementation Recommendations: Ceramir Crown and Bridge Cement or Resin-reinforced glass ionomer cement (RelyX Luting Cement, 3M ESPE; GC Fuji Plus, GC America) Resin cements for short or over-tapered preparations (RelyX Unicem, 3M ESPE; Panavia F2.0, Kuraray)