The document discusses common problems that can occur when heating acrylic resin for dentures and their potential causes. It lists 10 issues that may arise: porosity, tooth movements, breakage during removal from flask, cracked teeth, crazing of resin, bleaching, color streaks, sandy appearance, stone adhering to denture surface, and spaces between teeth and resin base. For each problem, it provides examples of causes such as rapid heating, improper packaging, contamination, or delayed curing.