In 2007 I was diagnosed with TMJ disorder and have been sleeping with a occlusal splint since then. I understand that heat-cured acrylic resin is used as the material of it. I was wondering if there are any long term risks with using the splint. By long term, I'm asking if the plastic could scrap off and be swallowed while one is sleeping, thus leading to diseases (i.e. cancer). Is the heat-cured acrylic resin safe with the way it is being used (sleeping with it) ?