After tooth loss, tooth loss should be seen at the hospital’s Department of Prosthodontics as soon as possible in order to carry out reasonable restorative treatment. The Department of Prosthodontics mainly carries out restorative treatment for the following tissue defects, color abnormalities or morphological abnormalities: (1) Treatment of tooth color abnormalities, tooth morphological abnormalities and repair of dental defects with artificial crowns, i.e. artificially made prosthetic crowns such as cast porcelain crowns, porcelain crowns, metal crowns, etc. (2) Treatment of mild dental defects such as missing several natural teeth with fixed bridges, i.e. artificially made fixed dentures such as cast porcelain bridges, porcelain bridges, metal bridges, etc. (3) Use removable partial teeth such as invisible denture, plastic dental wire retainer denture, recolored hard resin dental casting bracket denture, porcelain dental boutique casting bracket denture, attachment denture, etc. to treat severe tooth loss such as only a few natural teeth remaining after missing teeth. (4) Treatment of complete tooth loss with full mouth teeth such as composite hard resin teeth plastic bracket full mouth teeth, composite hard resin teeth cast metal bracket full mouth teeth, etc. (5) Treatment of various types of missing teeth with implant prosthesis, i.e., artificial tooth roots and then prosthesis made on the basis of artificial tooth roots, i.e., implant prosthesis, as well as the use of implant technology to solve the problem of retaining prosthesis such as prosthetic eyes (false eyes), prosthetic nose (false nose) and prosthetic ears (false ears).