A 42-year-old man complains of problems with chewing. Objectively, his tooth 26 is missing. On the medial surface of tooth 27 and distal surface of tooth 25 there are class II carious cavities according to Black's classification.It is recommended to make a full-cast dental bridge with 27 and 25 as the abutment teeth. What material is used to assess whether the dental bridge framework tightly adheres to the abutment teeth?