These are indirect restorations, like common fillings ,manufactured in the dental lab.
They are mainly used for cases where there is a lot of tooth decay or fracture which is not effectively corrected by direct fillings but not so extensive to require a crown.
They are made of white aesthetic resin material or ceramic and requires 2 visits in the office.
In the first one, the tooth is cleaned from the caries and the old fillings,impressions are taken and a temporary restoration is placed for a few days.
On the second visit the welding of the structure is done?Inlays and onlays,are an excellent technique for replacing old metalrestorations both in aesthetics and function.