The PMMA blank is made of polymethyl methacrylate and its resistance is between 70 and 110 MPa. The arrival of digital technology in the field of dentistry and the ability to grind PMMA using Codecam systems made this material to be used as a temporary coating in the patient’s mouth.
Due to the non-absorption of moisture in PMMA material, the amount of color change over time in the wet environment of the mouth is very low, and also because of its transparency, it has been satisfied by dentists and patients. Also, before injecting the metal, a frame can be cut from the PMMA blank by CAD CAM systems and sent to the office to test the frame. After controlling the PMMA frame and confirming the margin compliance by the dentist, the frame is returned to the laboratory and the casting process is performed.
