1990 Volume 9 Issue 1 Pages 80-90,124
A very effective method for removing a denture from its cast after curing has been developed using a static expansive agent for hydration. Three filling hole designs for packing the expansive agent into a stone cast were examined to obtain the most effective method of splitting the cast for clinical application. The dynamic strain in the resin denture base was measured during static splitting one filling hole design was the safest for handling and the most effective for removing the denture. The upper tolerance limits for the maximum strain were estimated to be 2.9×10-3 in the upper denture and 3.4×10-3 in the lower denture. These values were lower than one-third of the critical strain corresponding to the proportinal limit of the denture resin.
