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Rapid-processing procedure for heat polymerization of polymethyl methacrylate in a pressure cooker with automatic
1Stomatological Department, Western Region Hospital, Urumqi, Xinjiang Uygur, China.
The Journal of Prosthetic Dentistry
|October 1, 1996
Abstract:
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.