Denture Duplicating Flask for Use in Producing Full or Partial Dentures. When original dentures require time consuming lab repairs, eliminate your patient's inconvenience with the Denture Duplicator. This system, with its illustrated, explicit how-to instructions, enables a dental assistant to create an identical denture right in the office, quickly and easily. Produce full or partial dentures easily Convert partials into temporary 'immediate' full dentures Make full dentures from existing dentitions