A highly versatile zirconia, Katana UTML is 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
Undercuts
Rough margin
Groove
Paralled axis
Sharp incisal top
Height difference (anterior)
D2740 Crown – Porcelain/Ceramic Substrate
D6245 Pontic Porcelain/Ceramic
D6740 Abutment Crown Porcelain/Ceramic
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 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 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 due 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, NY). This is critical in assuring maximum bond strength.
