Rapid-processing procedure for heat polymerization of polymethyl methacrylate in a pressure cooker with automatic controls.
This study introduces a new rapid-processing procedure for curing polymethyl methacrylate denture base resin in an automatically controlled pressure cooker. The cooker filled with water was inflated with 6 kgf/cm2 air pressure and heated to 120 degrees C (248 degrees F) and maintained for 10 minutes. No significant differences were found between the new pressure cooker method and the conventional method for surface hardness and porosity (p > 0.05). The pressure cooker significantly shortened polymerization time, and the polymerization is controlled automatically.
Stomatological Department, Western Region Hospital, Urumqi, Xinjiang Uygur, China.
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D000399:Air Pressure; D003819:Denture Bases; D006244:Hardness; D006358:Hot Temperature; D008422:Materials Testing; D008768:Methylmethacrylates / Q000737:chemistry*; D011108:Polymers / Q000737:chemistry; D016062:Porosity; D013674:Technology, Dental / Q000295:instrumentation*
D008768:Methylmethacrylates; D011108:Polymers