it is a full denture that goes over 2 teeth and you put soft liner around opening so it fits tight around teeth.
There are a number of drawbacks associated with full dentures, and not everyone can successfully wear them. In many instances, false teeth are not especially useful because of retention or stability problems. For this reason, even a single healthy tooth left in place can stabilize an otherwise unstable full denture.
Only recently has it become possible to build a denture leaving a hole here and there to allow a few remaining teeth to poke through without ruining the suction which generally holds the denture in the mouth. 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.