At present, the teeth printed by 3D printers cannot be directly put into people's mouths. Before there was a 3D printer, to customize dentures, the customizer bit out a dental mold himself, and then took the dental mold to the master of the factory for repair and carving. This is very inefficient. Later, the appearance of 3D printers improved this phenomenon. The dentist will scan the patient's dental data through a 3D scanner and then print it out through a 3D printer. At present, DLP technology in light curing (used by Envisiontech) is mostly used to print castable dental molds. From the efficiency and accuracy, there has been a qualitative improvement. In the factory, an old master with five years' experience can make about 150 dental molds by working eight hours a day without interruption. With the current DLP3D printer, about 30 teeth can be produced in one hour and 240 teeth can be produced in eight hours.