Abstract: Using a highly flowable silicone putty which can be combined with catalysts to set, dentures can be repaired and modified by flowing the putty onto the dentures, allowing it to set while in intimate contact therewith, removing the dentures from the set putty for effecting changes, and subsequently reinserting the dentures in the set putty to effect any necessary changes, modifications or repairs. Prior art practices often used dental stone which had to be chipped away from the dentures when effecting repair or modification.