Whats the bond look like between baseplate and contour/finishing resins?
A. Contour and Setup Resins bond to the baseplate by micro-mechanical retention. The surface of the ground baseplate is irregular and the molten / liquified Contour and Set-up Resins flow into and around the rough surface contours while setting teeth and contouring the denture. When the Contour and Set-up Resins are cured, the resin is locked into place. This bond is the same as for bonding of plastic teeth to acrylic denture resin. There is no actual chemical bond of Contour Resin to the baseplate. The key in obtaining the best lock of Contour Resin and Set-up Resin to the baseplate is a good melt interface which is why the Directions For Use stress that the Set-up Resin surface must be melted prior to placement on the baseplate. Materials Q.
