Overview
EN ISO 22674:2022 (ISO 22674:2022) defines requirements and test methods for metallic materials used in fixed and removable dental restorations and appliances. It covers metallic materials recommended for use with or without ceramic veneers, and includes requirements for packaging, marking and instructions for use when products are delivered for sale to a third party. The standard excludes dental amalgam alloys (see ISO 24234), dental brazing materials (ISO 9333), metallic materials for orthodontic wires/brackets, and magnetic attachments (ISO 13017).
Keywords: ISO 22674, EN ISO 22674:2022, dental metallic materials, dental restorations, dental alloys, biocompatibility, corrosion resistance.
Key Topics
- Classification and symbols for metallic dental materials to standardize product identification.
- Chemical composition reporting and permitted deviations for declared elements.
- Hazardous element controls, with specified limits and special attention to nickel content and other elements of concern.
- Biocompatibility requirements to support safe intraoral use.
- Mechanical properties, including:
- Proof stress (0.2% non‑proportional extension)
- Elongation after fracture
- Elastic modulus measurement and precision requirements
- Density determination
- Corrosion resistance and tarnish resistance criteria to ensure material integrity and aesthetics.
- Thermal properties, such as solidus/liquidus (or melting point for pure metals) and linear thermal expansion coefficients-important when combining metals with ceramics.
- Sampling, specimen preparation and heat‑treatment procedures for consistent testing.
- Specified test methods, including tensile, flexure (three- or four-point bending), acoustic resonance, and density measurements, plus calculation methods for elasticity parameters.
- Information and marking requirements for packaging and instructions for use.
Applications
EN ISO 22674:2022 is practical for:
- Dental material manufacturers developing alloys and metallic dental products to meet regulatory and market requirements.
- Dental laboratories and technicians selecting materials for crowns, bridges, frameworks and removable prostheses.
- Testing and quality control laboratories performing standardized mechanical, chemical and corrosion tests.
- Regulatory bodies and procurement teams evaluating product compliance and ensuring patient safety.
- Clinicians and prosthodontists who need assurance about the mechanical performance, biocompatibility and compatibility of restorative metals with ceramics.
Using this standard helps ensure consistent product performance, traceability, safety and interchangeability of metallic dental materials across suppliers and jurisdictions.
Related Standards