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Fillings

What are fillings?

Teeth that have been affected by tooth decay (caries or cavities) require a filling. Advances in dental materials and techniques provide new, effective ways to restore teeth.

There are several different types of restorations, including:

  • direct restorations - require a single visit to place a filling directly into a prepared cavity. Materials used for these filings include dental amalgam, also known as silver fillings; glass ionomers; resin ionomers; and some composite (resin) fillings.

    Amalgam fillings have been used for decades, and have been tested for safety and resistance to wear. Dentists have found amalgams to be safe, reliable, and effective for restorations.

    Glass ionomers are tooth-colored materials made from fine glass powders and acrylic acids. These are used in small fillings that do not have to withstand heavy pressure from chewing. Resin ionomers are made from glass with acrylic acids and acrylic resin.

  • indirect restorations - require two or more visits and include inlays, onlays, veneers, crowns, and bridges. These are constructed with gold, base metal alloys, ceramics, or composites. At the first visit, a dentist will prepare the tooth and make an impression of the area that will be restored. At the second visit, the dentist will place the new restoration into the prepared area.

    For an indirect restoration, a dentist may use an all-porcelain, or ceramic, application. This material looks like natural tooth enamel in color and translucency. Another type of indirect restoration may use the porcelain that is fused to metal, which provides additional strength. Gold alloys are used often for crowns or inlays and onlays. Base metal alloys are used in crowns and are resistant to corrosion and fracture. Indirect composites are similar to those used for fillings and are tooth-colored, but they are not as strong as porcelain or metal restorations.

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Online Resources of Dental & Oral Health

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