Overview
EN ISO 6872:2024 - Dentistry - Ceramic materials is the latest CEN-adopted version of ISO 6872 (fifth edition) that defines requirements, recommendations and standardized test methods for dental ceramic materials used in fixed all-ceramic and metal-ceramic restorations and prostheses. Published August 2024 and endorsed by CEN, this standard replaces EN ISO 6872:2015 and its 2018 amendment, and is published in English, French and German.
Key topics and technical requirements
The standard specifies classification, sampling, test methods and information to be supplied by manufacturers. Major technical topics covered include:
- Types and identification
- Classification of dental ceramics (Type I and Type II) and their intended uses.
- Materials, processing and properties
- Requirements for uniformity, freedom from extraneous materials and mixing/condensation behaviour (for Type I ceramics).
- Mechanical and physical test methods
- Flexural strength - three‑point, four‑point and biaxial flexure (piston-on-three-ball) tests.
- Fracture toughness (informative Annex A) and Weibull statistics for reliability analysis (Annex B).
- Linear thermal expansion coefficient and glass transition temperature measurements.
- Chemical and biological stability
- Chemical solubility test procedures and radioactivity assessment.
- Protocol for assessing hydrothermal stability of yttria‑stabilized tetragonal zirconia (Y‑TZP) (Annex C).
- Sampling, specimen preparation and firing
- Detailed procedures for specimen fabrication, mixing apparatus and firing cycles relevant to testing.
- Information, instructions and labelling
- Mandatory manufacturer information, instructions for use, packaging, marking and labelling requirements.
Practical applications and who uses it
EN ISO 6872:2024 is essential for stakeholders involved in the design, manufacture, testing, regulation and clinical use of dental ceramics:
- Dental materials manufacturers - to ensure product conformity, label claims and to support CE marking/national compliance.
- Dental laboratories and technicians - for material selection, processing guidance and validation of ceramic systems for restorations.
- Testing laboratories and accreditation bodies - to run standardized mechanical, thermal and chemical tests and report results reproducibly.
- Regulators and procurement - to set acceptance criteria for restorative materials used in clinics and public health systems.
- Dental researchers and clinicians - for understanding material limits, longevity factors (e.g., Y‑TZP ageing) and performance metrics.
Related standards
- Identical to ISO 6872:2024 (en) and supersedes EN ISO 6872:2015 / A1:2018.
- Refer to national CEN member bodies for adoption status and any translation versions.
Keywords: EN ISO 6872:2024, dental ceramic materials, ceramic dental restorations, flexural strength, Y‑TZP, thermal expansion, chemical solubility, fracture toughness, biaxial flexure.