Abstract
The relationship between additional pressure after injection molding and the adaptability of denture base was determined.When pressure of about 60kgf/cm^2 was applied to the dough for 1 minute, the dough was completely injected in to the mold space.Fastening of sprue with stoppers of φ8×5mm and φ8×10mm at a pressure of about 10kgf/cm^2 after injection molding made the pressure of the dough increase to about 35 and 50kgf/cm^2, respectively.When the vent in the denture flask was fitted with a stopper, the resin base denture constructed without additional pressure after injection molding had an adaptability superior to that constructed with compression molding.The adaptability of the resin base denture constructed under additional pressure after injection molding was 30〜50% superior to that constructed with compression molding.
