A silicone rubber spacer used to determine the optimum thickness for hard and resilient materials in complete dentures.

When making a denture with a resilient lining, the problem of controlling the thickness of the resilient lining material is eliminated by use of a spacer. However, controlling the thickness of the hard acrylic resin denture base in these dentures remains a problem and may increase the possibility of fracture. When limited denture space is available, the portions of the denture base subject to fracture should have an accurate if not equal share of the resilient lining material and the hard acrylic resin material. This procedure will minimize the fracture problem of dentures made with resilient lining and is an alternative to conventional spacer procedures.