DMR Ⅱ is a rigid dental model resin that can be printed quickly. It has excellent mechanical properties and vertical printing capabilities, andcan achieve high-precision vertical printing. The DMR Ⅱ material can be easily removed from the forming table and is extremely easy to clean. With its high-strength physical properties and good surface properties, the invisible orthosis and night bite plate can be easily removed from the DMR Ⅱ model after thermoforming.