Overview
EN ISO 6874:2015 (ISO 6874:2015) - "Dentistry - Polymer-based pit and fissure sealants" specifies requirements and test methods for polymer-based materials used to seal pits and fissures in teeth. Adopted by CEN as a European Standard, it applies to both self-curing (Class 1) and external-energy‑activated (Class 2) sealants and defines sampling, test conditions and performance limits used for product evaluation and quality control.
Key topics and technical requirements
- Classification
- Class 1: Self‑curing materials (initiator + activator).
- Class 2: External‑energy‑activated materials (e.g., visible light).
- Performance requirements
- Working time (Class 1): not less than 40 s (measured per clause 6.4).
- Setting time (Class 1): not greater than 5 min (measured per clause 6.5).
- Depth of cure (Class 2): not less than 1.5 mm (measured per clause 6.6); each shade must comply.
- Test methods and conditions
- Sampling: retail package(s) from the same batch, minimum 20 g of material for testing.
- Standard test environment: (23 ± 2) °C, relative humidity > 30 %; refrigerated materials must equilibrate to test temperature.
- Includes specific test procedures (working time, setting time, depth of cure) and apparatus descriptions (e.g., thermometry apparatus used for working time).
- Biocompatibility
- The standard refers users to dedicated biological evaluation documents (see Related Standards) rather than specifying quantitative biocompatibility thresholds.
- Packaging, marking and instructions
- Requirements for manufacturer instructions, recommended energy sources for Class 2 materials and labeling are included to ensure correct clinical use.
Practical applications
- Product development: Guides R&D for formulation and curing strategy (self‑curing vs. light‑activated).
- Quality control and batch testing: Establishes pass/fail criteria for working time, setting time and depth of cure.
- Regulatory and conformity assessment: Used by manufacturers to demonstrate compliance with internationally recognized test methods.
- Clinical procurement and practice: Helps dental clinics and procurement teams compare sealants based on standardized performance data.
Who uses this standard
- Dental materials manufacturers and formulators
- Testing laboratories and quality managers
- Regulatory bodies and notified bodies in medical/dental device approval
- Dental researchers, professional associations and large dental practices
Related standards
- ISO 10993 (biological evaluation of medical devices)
- ISO 7405 (dental materials - biocompatibility guidance)
- ISO 1942 (dentistry vocabulary)
- ISO 8601 (date/time representation)
- ISO 10650 (guidance on light-curing devices)
Keywords: EN ISO 6874:2015, ISO 6874:2015, dentistry, pit and fissure sealants, polymer-based sealants, dental materials, depth of cure, working time, setting time, test methods, biocompatibility.
