The color of dentin is usually yellowish, and the enamel is thinned or even the dentin is exposed after tooth polishing, which makes the tooth yellow, and the tooth color can be modified through veneer restoration or full crown restoration, as follows. 1. Veneer restoration: using all-ceramic or resin restorative materials bonded to cover the surface of the teeth, covering the original tooth color. Usually used for anterior teeth, not suitable for maxillary teeth severe lip or tongue misalignment and teeth crowded misalignment. 2. Full crown restoration: All-ceramic crowns can be used to cover all the crowns. All-ceramic crowns have a better ability to withstand mastication and can be used to restore the tooth color of the front or back teeth. It is recommended to visit regular medical institutions to receive professional treatment.