Laboratory (Indirect) Processed Restorations are made outside of the mouth in a dental lab from an impression taken of the prepared tooth. They may be referred to as an inlay or onlay. An inlay is used to fill areas between the cusps. An onlay covers a larger area and is when a cusp needs to be covered. This type of restoration is more conservative than a crown as it involves less removal of the original tooth structure. Likewise, Laboratory Restorations are very strong and can last many years, providing you with a long-lasting, radiant smile.
Both Inlays and Onlays are made for teeth needing a larger filling. They provide the additional strength and durability that a basic composite or amalgam filling cannot provide. Moreover, they can be crafted using a tooth-colored composite (or porcelain), or alternatively be gold or silver colored. Porcelain most closely resembles your natural teeth making it a popular choice.
Reasons for an Inlay or Onlay: