Dental inlays are restorations which are used to repair the rear teeth with slight decay or cracked and fractured teeth which needs a crown. Many individuals for inlay or onlay have to work typically for damaging or decaying in the tooth structure which is successful for treating using fillers. It allows the dentist to conserve many patients original tooth structure. Many dental inlays and outlays are used for old fillings which need to be removed or replaced and further dental inlay is very similar to a filling and fits the inside cusp tips of the tooth. Furthermore, a dental onlay is very extensive and extends to the treated tooth. During the treatment the dentist helps to remove the old fillings under the local anaesthesia and it takes an impression for the tooth which is further sent to the dental laboratory. However, the new inlay is cemented into a place for the next appointment and blends successfully with the treated tooth and the rest of the teeth to achieve a natural, uniform look. It takes almost two appointments for the inlays treatment to be fully completed and finally linked to damaged area of the tooth. Onlays and inlays are performed using similar ways. Any decay or damage helps to remove it by drilling and cleaning the tooth for the dental inlay.