NATURAL COLOUR GRADIENT
PROGRESSIVE ZIRCONIA GENERATION
FOR LIFELIKE OUTCOMES
FOR A WIDE INDICATION RANGE
Kuraray Noritake is well aware of the importance of varying levels of chroma and translucency in different parts of a natural tooth. Our aim has been to mimic this effect with the aid of porcelain layering. In areas where the dentin core is revealed, a tooth is highly chromatic and rather opaque. In contrast, those parts of a tooth mainly composed of enamel – such as the incisal edge - are highly translucent and have a low chroma. Our patented KATANA ™ Zirconia multi-layered technology has been developed to precisely imitate this gradient in chroma and has virtually seamless transition between layers, resulting in a tooth-like appearance without the need for porcelain layering. The four types of multi-layered KATANA ™ Zirconia (UTML, STML, YML* and HTML PLUS) have a four-layer colour structure. The optical outcome is revealed immediately after sintering.
While some dental technicians like to switch between different zirconia materials and finishing techniques, others prefer to use a single zirconia for every indication. This is why Kuraray Noritake has developed a multi-layered zirconia with additional flexural-strength and translucency gradation – KATANA ™ Zirconia YML. A smooth transition from one layer to the next delivers structural integrity and flawless aesthetics.
Flexural Strength 1
Layer
Translucency 2
High translucency
Enamel (35%)
750 MPa
49%
4-LAYER COLOUR STRUCTURE
Image of gradation
Body 1 (15%)
Enamel Layer
1.000 MPa
47%
Transition Layer 1
Body 2 (15%)
Transition Layer 2
Body Layer
1.100 MPa
45%
Body 3 (35%)
High strength
(..%) the thickness of each layer in a disc in %
Measurement condition: Evaluated by base material (white color). 1 According to ISO 6872: 2015, Sample size: 3 x 4 x 40mm, 2 All light transmittance, illuminant: D65, Thickness of sample: 1.0mm
Data source: Kuraray Noritake Dental Inc. The numerical value varies according to a condition.
*KATANA ™ Zirconia YML detailed layer structure on page 5
kuraraynoritake.eu
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