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Treatment Information

Dentures

Types of DenturesDuplicates

When your new full denture is being made, you may consider ordering an exact copy of the denture to have on hand in case of emergency. The duplicate can be made quickly and is much less expensive than the original.

Duplicates are made using a substance known as agar. Agar is a gelatin-like material made from seaweed that is liquid when hot, but cools to form a flexible rubbery substance. It is one of the oldest, but still one of the most accurate impression materials known.

Your dentist will flow the liquid agar around the finished denture and allow it to harden. Then, the original denture is removed from the agar mould. The mould is filled with liquid plastic -white plastic in the tooth indents and pink plastic to form the base and flanges. The liquid plastic is then allowed to harden.

Duplicate dentures are not especially high quality. The flowable plastic used to make them tends to be porous and less resistant to wear. Also, the delineation between the tooth-coloured plastic in the tooth indents and the pink base plastic may not always be exactly at the margins of the teeth. However, these dentures make it possible to keep a spare set of dentures tucked away just in case the regular denture must be sent out for repair, or is lost and a new denture must be made. 

To make them affordable, they are frequently delivered to the patient without adjusting them for sore spots or any other technical modifications that you would have with a proper set of dentures. Adjustments cost money, and if dentists spent as much time and effort on them as they do on the primary service, the duplicate could end up costing as much as the primary full denture. That’s why you should never consider duplicate dentures as a permanent solution. While they may cost less, the fit and appearance will never be as good as your primary dentures.