The present invention relates to a method for reducing or eliminating loss of minerals from the enamel and dental hypersensitivity against temperature changes, in particular when caused by the bleaching of teeth with products containing hydrogen peroxide or other oxidizing agents. The method includes providing a substrate assembly having a surface including at least one metal-containing adhesion region separated by at least one surface region of the substrate assembly. Joint compression encoding may include designing preceding matrices that may be used with signal compression.