This part of ISO 9693 specifes test methods for determining the compatibility of metallic and ceramic materials used for dental restorations by testing the composite structure.The requirements given in this part of ISO 9693 are applicable to metallic materials and ceramics when used in combination, and are not applicable to either metallic materials or ceramics when used alone.NOTE Requirements for metallic materials are given in ISO 22674; requirements for ceramic materials are given in ISO 6872.