Overview
ISO/TR 17327-2:2021 is a technical report from ISO addressing implant coatings for non‑active surgical implants. It does not set new performance limits; instead it provides curated lists of reference standards (international and national) that contain general guidance, device- or application‑specific information, material specifications, and test methods related to implant coatings. The document is intended to be used with ISO 17327-1, which defines the generic coating properties and characterization needs.
Key topics and requirements
- Scope and purpose
- Applicable to coatings on non‑active surgical implants.
- Helps link ISO 17327-1’s generic coating requirements to existing, relevant standards.
- Reference mapping
- Reference standards are grouped by: general standards, implant-related standards (cardiovascular, orthopaedic, other), and compositional specification / test method standards.
- Each referenced standard is mapped to ten coating properties introduced in ISO 17327-1:
- Chemical composition
- Phase composition
- Surface texture
- Coating integrity
- Dissolvability
- Coating thickness
- Adhesion strength
- Abrasion resistance
- Porosity and pore size
- Surface wettability
- Designation of relationships
- Entries indicate whether a reference provides a Test Method (TM), a Requirement (R), or General Information (GI) for a given property - so users can identify applicable test standards (e.g., ASTM, ISO, JIS, USP) and regulatory guidance (e.g., FDA).
- Practical guidance
- Tables (e.g., for cardiovascular and orthopaedic implants) point to specific standards such as ISO 5840 (cardiovascular), ISO 13779 (hydroxyapatite/orthopaedic), ISO 10993-18, ASTM methods, and compositional tests (e.g., ISO 9277).
Applications - who uses it and why
- Medical device manufacturers designing or qualifying coatings for non‑active implants (orthopaedic, cardiovascular, dental, other).
- R&D and materials engineers selecting coating materials and planning characterization matrices.
- Quality and regulatory affairs teams mapping device testing to recognized standards for submissions and conformity assessments.
- Testing laboratories / contract manufacturers identifying accepted test methods for properties such as adhesion, thickness, porosity, or dissolution.
- Notified bodies and auditors using the referenced standards to assess compliance with coating characterization expectations.
Related standards and practical notes
- Use ISO/TR 17327-2 together with ISO 17327-1 to define characterization scope, then consult the referenced standards (ISO, ASTM, JIS, USP, FDA guidance) for specific test methods and limits.
- The report is a starting point - referenced standards themselves must be reviewed for full technical details and applicability to a specific coating/substrate/device combination.
Keywords: ISO TR 17327-2:2021, implant coating, non-active surgical implants, coating characterization, ISO 17327-1, reference standards, test methods, adhesion strength, coating thickness, porosity.