Is there a soft denture relining material that lasts longer than the traditional acrylic-based soft reliners?

Yes. A new material, SOFRELINER TOUGH (Tokuyama Dental Corp./Tokuyama America Inc.), is an addition silicone that is formulated specifically for denture soft relining and has shown excellent clinical results. It adheres well to denture acrylic and has excellent resistance to staining, cracking, tearing, and wear.