Dentsply Sirona recently introduced CEREC Tessera high-strength glass ceramic blocks for CAD/CAM fabricated restorations.
The lithium disilicate CAD/CAM blocks can be fired quickly and are indicated for both the anterior and posterior regions, according to a press release. Glaze firing takes four and a half minutes in the company’s SpeedFire, accelerating the manufacturing process.
The new composition of the ceramic, which is made of lithium disilicate and virgilite, a lithium aluminum silicate, make this faster firing time possible. During the firing process, virgilite crystals are formed and embedded in a zirconia enriched glass matrix. The material constituents combine to create a reinforced, high-density restorative material.
The blocks’ dense interwoven crystal composition gives them their strength and helps suppress microcracks and subsequent crack propagation. The microcrystal composition also contributes to the material’s highly esthetic light refraction, transmission and adsorptive properties that mimic natural dentition.
The blocks provide clinical benefits with their low minimal wall thickness preparation guidelines and the ability to use conventional cementation. CEREC Tessera restorations can be fixed adhesively. Restorations with a wall thickness of 1.5 millimeters can also be conventionally cemented with a glass ionomer or hybrid glass ionomers.
The blocks are now available in the United States and are indicated for fully anatomical single-tooth restorations in the anterior and posterior regions including crowns, inlays, onlays and veneers.
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