In the CEREC Tessera blocks, the lithium disilicate provides the high tensile strength, while the newly formed virgilite increases the precompression stress.
CEREC TESSERA PDF CRACK
The dense interwoven crystal composition of CEREC Tessera blocks is key to their high strength and helps suppress the presence of microcracks and subsequent crack propagation. Together, these material constituents combine to create a robustly reinforced, high-density restorative material. During the firing process, new virgilite crystals are formed and embedded in a zirconia enriched glass matrix. The innovative microcrystalline composition with the material virgilite is patent pending in both the USA and the EU. The fast-firing time is mainly made possible by the special and new composition of the ceramic made of lithium disilicate and virgilite, a lithium aluminum silicate. Before firing, the application of a glaze is necessary to achieve the final properties, such as the high biaxial flexural strength of over 700 MPa. Compared to other glass ceramics, this represents a time saving across the entire manufacturing process of about 44 percent. A crown can be fired in the CEREC SpeedFire in just 4 minutes and 30 seconds. The new CEREC Tessera blocks have proven to be very strong, meet very high esthetic demands and accelerate the entire manufacturing process within the chairside workflow by shortening the glaze firing time. The reason is mainly esthetics – patients usually want restorations looking nearly identical to their natural teeth.Īdvanced material properties due to optimized microstructure High-strength glass ceramics are frequently used by dentists for CAD/CAM-fabricated restorations. CEREC Tessera is now available on the European market. CEREC Tessera blocks are therefore an attractive option within single-visit dentistry. The glaze firing takes only four and a half minutes, so the entire manufacturing process is accelerated. The advanced lithium disilicate (ALD) ceramic is characterized primarily by its robust strength and high esthetics. Dentsply Sirona has introduced CEREC Tessera Advanced Lithium Disilicate CAD/CAM Blocks, a new material for CAD/CAM-fabricated restorations for anterior and posterior regions.
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