The CU-SIL denture has holes for natural teeth. These holes are surrounded by a gasket of stable silicone rubber which hugs the natural teeth and allows the rest of the denture to rest against the gums giving the benefit of suction in addition to the mechanical stability offered by the immobility of the natural teeth. These are especially useful in situations in which the remaining teeth are on the same side or area of the arch as in the example below. Even a single remaining tooth in the arch can increase the stability of the entire denture several hundred percent over a completely edentulous (no teeth) arch.

Another variation of the Cu-Sil denture involves the placement of a denture OVER teeth that have been endodonticly treated and cut down flush with the gums. These are called OVERDENTURES. This has the benefit of retaining the bone which holds the natural teeth in place, thus maintaining a more retentive ridge shape that does not tend to disappear over time as does the bone that used to retain the now extracted natural teeth. The Cu-Sil is often placed on the denture base over the tooth stumps to give a cushion which allows the rest of the denture to press into the gums for maximum surface contact and stability.