The teeth printed by 3D printers, for the time being, can not be directly set into the human mouth. Before there was a 3D printer, to customize dentures, it was the customizer himself bit out a tooth mold, and then, the mold was taken to the factory teacher to repair and carve. This is very inefficient. Later, the advent of 3D printers improved this. The dentist will scan the patient's teeth data through a 3D scanner, and with the data, print it out through a 3D printer. Currently, most of them use DLP technology in light curing (which is what Envisiontech uses) to print dental molds that can be cast. There has been a qualitative improvement in terms of efficiency and accuracy. In the factory, a teacher with five years of experience, a day of non-stop work 8 hours, can do about 150 teeth molds, using the current DLP3D printer, an hour can be out of about 30 teeth, 8 hours can be out of 240.