Katana Utra-Translucent Multi-Layered zirconia offers the most lifelike restorations of any zirconia crown available. With translucency comparable to lithium disilicate ceramics and natural shading through four layers of chroma, including two transitional layers, it provides natural esthetics suitable for restorations in the cosmetic zone. Its average flexural strength of 550 MPa is about 150 percent stronger than comparable high-translucency millable ceramics.
A highly versatile zirconia, Katana UTML is indicated for Ideal for anterior crowns and veneers, inlays/onlays and posterior single crowns.
If the patient is hypersensitive to zirconia or any other components, Katana UTML should not be used.
Contraindicated forms include:
- “J” margin
- Deep shoulder
- Knife edge
- Rough margin
- Paralled axis
- Sharp incisal top
- Height difference (anterior)
Shoulder preparation not needed. A mild champfer 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 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 zirconia restorations with the porcelain polishing system of your choice.
Katana UTML zirconia may be cemented using a resin reinforced glass ionomer such as Relyx Luting cement. When a greater bond is needed do to the lack of a retentive preparation, use resin cement like Relyx Unicam or Relyx Ultimate.
Before cementing all Katana UTML zirconia crowns, the interior surface of the crown needs to be cleaned with Ivoclean (Ivoclar Vivadent; Amherst N.Y.). This is critical in assuring maximum bond strength.
Pearl Surface Z is a diamond paste ideal for polishing the zirconia surface to a final finish on Full Contour Zirconia Crowns. Specially developed for Katana zirconia, It is the simplest and fastest way to achieve finished Full Contour Zirconia Crowns.
D2740 Crown – Porcelain/Ceramic Substrate
D6245 Pontic Porcelain/Ceramic
D6740 Abutment Crown Porcelain/Ceramic