Dental ceramics in dentistry can be broadly categorized into several types, each with specific applications and properties:
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Resin Composites: These materials are used for restorative purposes due to their aesthetic properties and concerns about mercury in dental amalgams. They consist of a resin binder, typically an aromatic dimethacrylate monomer, and a ceramic filler such as pulverized quartz, colloidal silica, or silicate glasses containing strontium or barium for X-ray opacity. Resin composites are less durable than dental amalgams, especially in posterior restorations, and can degrade over time due to the breakdown of the bond between filler particles and the matrix.
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Dental Porcelain: A type of unglazed ceramic, dental porcelain is used for making crowns and veneers. It is composed of about 60% pure kaolin and 40% other additives like feldspar, quartz, or oxides to enhance color, hardness, and durability. Porcelain is softer than natural dentin and requires support from the natural tooth structure or a bonding agent.
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Metal Ceramic Systems: These systems combine the aesthetic properties of ceramics with the mechanical strength of metals. They are used to create durable and visually appealing dental prostheses that can withstand the functional forces in the oral cavity.
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Technical (Advanced) Ceramics: These ceramics are used in high-temperature applications, such as dental implants. They are processed in highly uniform furnaces at temperatures up to 2,050°F (1,120°C) to ensure precise shaping and bonding without shrinkage or distortion.
Each type of dental ceramic serves a specific purpose in dentistry, from aesthetic restorations to durable prostheses, and is selected based on the specific needs of the patient and the clinical situation.
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