A resin that polymerizes under heat (heat-cured), light (light-cured), and/or after a period of time (self-cured) intended to be used in the dental laboratory to manufacture a patient-worn dental appliance (e.g., denture base, occlusal splint/night guard); it may in addition be intended to fabricate non-patient-worn devices (e.g., drilling templates using 3-D printing). It consists of a reactive component (e.g., acrylic monomer, reactive polymer) that hardens via polymerization [or vulcanization]. Reinforcing fillers may be included in the resin to increase its strength and/or durability. After application, this material cannot be refabricated.