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Celtra stands for successful all-ceramic restorations ...

1 ... with extraordinary
aesthetics
An increased glass content visibly improves aesthetics by facilitating in-depth opalescence and fluorescence.
2 ... with outstanding
strength
The near-atomic dissolution of the zirconia does not cloud the glass and reinforces the glass matrix. In combination with the presence of the glass-ceramic crystals, this results in very high strength.
3 ... in a minimum of
time
The very small glass-ceramic crystals allow the material to be finished and polished in its final crystallized, tooth-coloured state. An additional crystallization step – as with lithium disilicate – is not required.

Optical properties and their benefits

NATURAL OPALESCENCE
NATURAL OPALESCENCE
The lithium silicate crystallites in Celtra, 500–700 nm in size, correspond exactly to the wavelength range of natural daylight that is responsible for the opalescence. Celtra thus behaves like a natural tooth enamel.
FLUORESZENZ
The fluorescence of Celtra materials is graded by brightness. The fine crystals of the microstructure and the high glass content create a deep fluorescent effect and make the intensity easy to adjust.
FLUORESZENZ
CHAMELEON EFFECT
CHAMELEON EFFECT
The high light conductivity and shade adaptation of Celtra in conjunction with the remaining natural teeth and the pronounced opalescence create the desired chameleon effect. With its lightoptical properties based on the ZLS microstructure, Celtra has a reduced greying risk.
Learn more about Celtra® Duo

Mechanical properties

HIGH EDGE STABILITY

Material 1Material 2Material 3Celtra Duo

STRENGTH RESERVES AFTER ARTIFICIAL AGING – CHEWING SIMULATIONS

In the chewing simulation, Celtra behaves in a way that is atypical of ceramic materials. While ceramics usually lose some of their strength in the aging process, Celtra retains its high level of strength due to ample strength reserves – a strength that contributes to the long-term safety of the restoration.
CHEWING SIMULATIONS
Load at fracture, anterior crowns – thermal cycling (5°C–55°C), 6000 cycles, followed by 1.2 million chewing cycles at 70 N.

POLISHING IN THE LABORATORY

Thanks to the unique microstructure of Celtra, restorations can be polished quickly and easily. The fine lithium silicate crystallites embedded in the glass matrix give Celtra its homogeneous surface that retains its typical light-optical properties. On top of that, polishing does not take long at all.
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POLISHING IN THE DENTAL OFFICE

With Celtra, the necessary intraoral occlusal adjustments and subsequent polishing of the milled surfaces are quickly accomplished by the dentist. The surface quality achieved is excellent thanks to the new microstructure.
Intraoral polishing

Intraoral polishing

Final restorations

Final restorations

Speed

CELTRA – WITH STAINING AND GLAZE FIRING

Only 29:50 minutes to 370 MPa – Celtra attains the same bending strength as lithium disilicate in less time. In addition, its high edge stability and excellent polishability supports high-quality laboratory outcomes.
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CELTRA – POLISHED ONLY

With just a single polishing step, inlays (to give one example) are milled within 14:30 minutes and, at 210 MPa, become twice as strong as glass ceramics.
 

MORE STRENGTH IN LESS TIME

Molar, C14 block size, standard milling program
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SIGNIFICANTLY HIGHER STRENGTH IN APPROXIMATELY THE SAME TIME

Molar, C14 block size, standard milling program
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