Overview
EN ISO 21850-2:2025 - "Dentistry - Materials for dental instruments - Part 2: Polymers" (CEN adoption of ISO 21850-2:2025) specifies polymers commonly used in the manufacture of dental instruments. The standard covers polymers used for entire instruments or parts, for both single‑use and reusable devices, whether hand‑held or connected to power‑driven systems. It excludes oral appliances and long‑term intra‑oral devices (e.g., crowns, bridges, implants) and non‑polymeric instruments.
Key topics and requirements
- Material designation and naming: Polymer chemical composition and designation shall follow ISO 1043‑1 conventions where applicable.
- List of common polymers: The document provides examples and abbreviations (e.g., ABS, PA, PEEK, PC, POM, PP, PTFE, PSU, PPSU, PE, PBT, PEI, PUR, silicone).
- Selection criteria: Polymers must be selected based on required functional properties for the intended purpose, taking into account effects of manufacture, handling, sterilization, and storage.
- Suitability demonstration: Manufacturers demonstrate suitability either by design evaluation (see Clause 6: pre‑clinical evaluation) or by selecting polymers listed with evidence of common or demonstrated clinical use.
- Certification of analysis: Manufacturers are required to confirm the composition of polymers used; methods are at the manufacturer’s discretion, using standardized analytical methods where appropriate.
- Pre‑clinical evaluation: The standard requires pre‑clinical evaluation to support material selection and device safety (details in Clause 6).
Practical applications
- Product development and material selection for plastic components of dental instruments (handles, trays, syringe tips, retractor parts, scaler handles, rotary shanks).
- Risk‑based evaluation of polymer suitability for instruments subject to sterilization cycles or disposability requirements.
- Supporting documentation for regulatory filings, supplier quality agreements, and procurement specifications.
- Harmonizing test and approval procedures across Europe to reduce duplicated testing and approval costs.
Who should use this standard
- Dental instrument manufacturers and product designers selecting polymers for new or improved instruments.
- Regulatory and compliance teams preparing technical files and biocompatibility assessments.
- Materials engineers, quality assurance professionals, and test laboratories verifying polymer composition and performance.
- Procurement specialists specifying material requirements for components and outsourced molding.
Related standards (normative references)
EN ISO 21850-2:2025 is a practical guidance tool for selecting and documenting polymer materials used in contemporary dental instrument manufacture, improving safety, consistency and regulatory alignment.