An inlay is a restoration that is embedded inside a tooth to restore the defect and its form and function. There are two types of inlays, one is in-cavity inlays, as the name implies, which are embedded in the crown of the tooth; there is a part of the restoration that is above the tooth surface called high inlays, which are used to increase the retention of the inlay while restoring the occlusal function with the opposite jaw. Sometimes, in order to increase the retention force of the inlay, a cavity shape called peg retention may be developed using an inverted concavity to increase the retention force of the inlay called peg inlay, and the inlay covering most or all of the crown is called inlay crown. Unlike direct fillings, inlays are an indirect restoration done on a model and fixed to the defective area of the tooth with an adhesive or bonding agent. There are metal inlays, porcelain inlays, and composite resin inlays, depending on the material used to make them. The cavity inlay is mainly used to restore the defect of the affected tooth, while the high inlay is mainly suitable for restoring the height of the crown and the contact relationship of the opposing teeth. Inlay crowns are mostly used to restore defects in the dentition, including defects in the incisal angle and crest, which are its indications.