Fabrication of polymeric dental devices and aids

A method of making a hermetically sealed enclosure for use in fabricating a polymeric dental article, the method comprising:

• disposing two flexible sheets face-to-face and sealing certain portions together to form a) a first burst pouch at one lengthwise end of the enclosure which is hermetically sealed except along an open portion of a perimeter margin through which the first burst pouch can be filled, b) a hermetically sealed dispensing funnel chamber at an opposite lengthwise end of the enclosure, c) a second burst pouch which is between the first burst pouch and the dispensing funnel chamber and which is hermetically sealed except along an open portion of a perimeter margin through which the second burst pouch can be filled, d) a first burst seal between a lengthwise inner end of the first burst pouch and a first lengthwise end of the second burst pouch adjacent the first burst pouch, e) a second burst seal disposed between a second lengthwise end of the second burst pouch and an inner lengthwise end of the dispensing funnel chamber which is adjacent the second lengthwise end of the second burst pouch, and f) a tear-off strip closing an outlet of the dispensing funnel chamber at an outer lengthwise end of the dispensing funnel chamber;
• then, after the first burst pouch, the dispensing funnel chamber, the second burst pouch, the first burst seal, the second burst seal, and the tear-off strip have been formed,
• filling the first burst pouch through the open portion of its perimeter margin with a first monomer and then hermetically sealing its open perimeter margin closed;
• and
• filling the second burst pouch through the open portion of its perimeter margin with a second monomer and then hermetically sealing its open perimeter margin closed.