One highly esthetic block - two processing options
A proprietary Zirconia-reinforced Lithium Silicate (ZLS) microstructure makes Celtra Duo (ZLS) the one and only CEREC material that allows complete control over the workflow process without sacrificing the quality of the final restoration.
With crystallites four to eight times smaller than lithium disilicate blocks, Celtra Duo (ZLS) possesses an ultra-fine microstructure that combines high flexural strength with a high glass content, resulting in an impressive strength and beauty profile.
Benefits
Why choose Celtra Duo?
Flexible processing options
Choosing between mill and fire (370 MPa) or mill and polish (210 MPa) provides workflow flexibility and processing freedom with every case.
Chameleon effect for highly esthetic restorations
The high light conductivity and shade adaptation of Celtra Duo in conjunction with the remaining natural teeth and the pronounced opalescence create the desired chameleon effect.
Clinically proven strength for long-term clinical confidence
Even after 6,000 thermal cycles (41°F to 131°F) and 1.2 million chewing cycles with 70 Newtons of force, Celtra Duo demonstrated no loss in strength.
Automated sintering and glazing with CEREC SpeedFire
No programming of the furnace required.
Selbstheilend für mehr Festigkeit und Haltbarkeit
Der hohe Glasanteil von Celtra Duo (ZLS) verleiht dem Material nicht nur seine hervorragenden lichtoptischen und mechanischen Eigenschaften, sondern bietet auch den zusätzlichen Vorteil der Selbstheilung beim Brennen.
Während des Brennvorgangs wird die Glaskeramik bei Erreichen der Glasübergangstemperatur zu einer hochviskosen "Flüssigkeit", die jedoch nicht so zähflüssig ist, dass sie die Form der Restauration verliert. Vielmehr füllt das zähflüssige Glas die durch den Schleifprozess entstandenen Unebenheiten aus. Nach dem Brennen, wenn das Material die Selbstheilungsphase durchlaufen hat, härtet es beim Abkühlen auf Raumtemperatur wieder auf seine ursprüngliche hohe Festigkeit aus.
"The first true high strength glass ceramic that offers the option to polish only or fire in the oven for additional strength...it's very unique in the market."
Dr. Bob Conte
"Celtra Duo covers a very broad spectrum of clinical indications. The advantage is we can work quickly, saves us time, makes us more efficient."
Dr. Andrew Hall
The science behind the block
Learn more about Celtra Duo (ZLS) and the recommended ways to handle the material in clinical application.
Preparing Celtra Duo (ZLS)
The preparation requirements of Celtra Duo (ZLS) are similar to other all-cermic restorations. Clinicians should aim for 1.5mm to 2mm of occlusal reduction with at least 1mm of axial reduction.
As with all CEREC restorations, the margins are the most critical part of the preparation and should be smooth and polished. Any milled restoration requires smooth polished margins so that the milling unit can adequately mill Celtra Duo (ZLS) restorations with ease.
Option 1: Mill and Fire
Characterization and firing technique
Fired restorations have a flexural strength of 370 MPa.
The induction furnace CEREC SpeedFire by Dentsply Sirona combines the processes of sintering and glazing in one compact, user-friendly device. The CEREC SpeedFire reaches a maximum heating rate of 300 °C per minute – no preheating or holding temperatures are necessary. Its induction technology ensures a perfectly homogeneous temperature distribution. Its dimensions make the CEREC SpeedFire a compact device that fits in any practice.
No firing schedules are required for CEREC SpeedFire. All sintering and glazing processes are completely automated: The CEREC Software sends the order with the necessary information to the furnace, eliminating the need for manual programming.
Option 2: Mill and Polish
Milled restorations have a flexural strength of 210MPa after polishing.
Downloads
Further resources can be found in our Download Center.
