Overview
ISO 22674:2022 - "Dentistry - Metallic materials for fixed and removable restorations and appliances" specifies requirements and test methods for metallic materials used to fabricate dental restorations and appliances. The standard covers alloys and commercially pure metals intended for use with or without ceramic veneers and defines requirements for chemical composition, mechanical properties, corrosion and tarnish resistance, density, thermal behavior, packaging, marking and instructions for use. It excludes dental amalgam (see ISO 24234), dental brazing materials (ISO 9333), orthodontic appliance metals, and magnetic attachments (ISO 13017).
Key topics and technical requirements
- Chemical composition and reporting: required declaration of elemental content and permitted deviations.
- Hazardous elements: identification and limit-setting for elements of concern (including nickel considerations).
- Biocompatibility: expectations for safe clinical use and information to support biological evaluation.
- Mechanical properties: mandatory tests such as proof stress (0.2% non‑proportional extension), elongation after fracture and elastic modulus.
- Physical properties: density, solidus/liquidus or melting point, and linear thermal expansion coefficients.
- Corrosion and tarnish resistance: procedures for material integrity and aesthetic stability (including static and cyclic immersion methods; ISO 10271 referenced for static immersion).
- Sampling, specimen preparation and heat treatment: standardized preparation methods for reliable test results.
- Test methods and measurement: tensile, flexure, acoustic resonance and thermal analysis methods are specified for evaluating performance.
- Information and labelling: required product marking, labelling of packages and instructions for use, including processing guidance for dental laboratories and clinicians.
- Test reporting: content and format expectations for conformity evidence.
Applications and target users
ISO 22674:2022 is essential for:
- Dental materials manufacturers developing or certifying dental alloys and metals.
- Dental laboratories selecting and processing materials for fixed and removable prostheses, including metal-ceramic restorations.
- Testing/inspection laboratories performing mechanical, corrosion and thermal tests.
- Regulatory and quality managers ensuring compliance for market access and patient safety.
- Dental clinicians and prosthodontists who need material data to inform clinical decisions.
Using ISO 22674 helps ensure consistent performance, safety and traceability of dental metallic materials across manufacturing, laboratory processing and clinical use.
Related standards
- ISO 24234 - dental amalgam (exclusion reference)
- ISO 9333 - dental brazing materials (exclusion reference)
- ISO 13017 - magnetic attachments (exclusion reference)
- ISO 10271 - corrosion testing (referenced in testing procedures)
Keywords: ISO 22674:2022, dentistry metallic materials, dental alloys, metal-ceramic restorations, corrosion resistance, mechanical testing, biocompatibility, dental standards.