We proposed a new method of applying an immediate post-surgical maxillary prosthesis made of light-polymerized resin （Maxillofacial Prosthetics 28：91-96, 2006）. Denture relining materials may need to be applied to the remaining tissue for longer tentative use. Clinical experience shows that relining materials tend to peel off the obturator materials. However, there is no information about the bonding strength among the materials. The purpose of this study was to examine the bonding strength between light-polymerized resin （Denture-AidTM） and relining materials or tissue conditioning materials. Experimental models were fabricated using the light-polymerized resin and three types of autopolymerizing resins （Mild RebaronTM, RebaseⅡTM, UnifastTM） and tissue conditioning materials （Soft LinerTM, Tissue ConditionerTM, Visco-gelTM）. The effect of primers on bonding was also examined. The maximum bonding strength of each material was measured by tensile and shear tests. As a result, the bonding strength of tissue conditioning materials against Denture-AidTM was lower than that of the autopolymerizing resin. The bonding strengths increased after applying the composite resin primer and increasing the surface roughness. Therefore, it is suggested that relining of the light-polymerized resin required surface modification to increase bonding strength.
