ISO 6876-2025 PDF

Full title and description

ISO 6876:2025 — Dentistry — Endodontic sealing materials. This International Standard specifies classification, requirements and test methods for endodontic (root‑canal) sealing materials used in dentistry, covering materials for conventional orthograde obturation and for other endodontic sealing procedures.

Abstract

This edition (2025) updates and expands ISO 6876 to cover two types of endodontic sealing materials (Type 1 for conventional orthograde sealing and Type 2 for other sealing procedures such as apexification, perforation filling, resorption treatment and retrograde root‑end filling). The document sets out classification, physical and chemical requirements, test methods (flow, film thickness, setting/working times, radiopacity, solubility/dimensional stability, etc.), labelling and performance criteria. The standard notes that it does not specify sterility requirements and refers users to national regulations and to sterilization standards where applicable.

General information

• Status: Published.
• Publication date: November 2025.
• Publisher: International Organization for Standardization (ISO).
• ICS / categories: 11.060.10 (Dental materials).
• Edition / version: Edition 4 (2025).
• Number of pages: 20 pages.

Scope

ISO 6876:2025 applies to endodontic sealing materials intended for use in dentistry. It is applicable to materials used for conventional orthograde endodontic sealing (Type 1) and to materials used for other endodontic sealing procedures including apexification, perforation filling, resorption treatment and retrograde root‑end filling (Type 2). The standard clarifies that Type 2 materials may be used in vital pulp therapy scenarios but that requirements for vital pulp therapy itself are not addressed. Sterility is not specified in the standard; manufacturers should refer to applicable national regulations and to sterilization standards (for example ISO 11737 series) when relevant.

Key topics and requirements

• Classification into Type 1 (orthograde) and Type 2 (other endodontic sealing uses).
• Physical property requirements and test methods: flow, film thickness, working and setting times, radiopacity, dimensional stability and solubility limits.
• Chemical/compositional requirements and restrictions relevant to performance and safety.
• Radiopacity requirements to ensure adequate clinical detection on radiographs.
• Labelling, packaging and instructions for use (intended indications, handling, mixing, storage and safety information).
• Reference to biological evaluation and biocompatibility pathways (use of ISO 10993 series / dental biocompatibility guidance such as ISO 7405 where appropriate).
• Note that the standard does not itself specify sterilization processes or sterility requirements; relevant sterilization validation standards (ISO 11737 series) are referenced for national/regulatory use.

Typical use and users

Primary users are dental materials manufacturers (product development and quality assurance), regulatory and conformity assessment bodies, dental laboratories and testing laboratories performing standard performance tests, and clinical endodontists and general dental practitioners who select and use endodontic sealers. Researchers developing or evaluating new sealer chemistries (e.g., bioceramic/calcium‑silicate sealers) also rely on the test methods and acceptance criteria in this standard.

Related standards

Relevant and commonly referenced standards when applying ISO 6876:2025 include the ISO 10993 series for biological evaluation of medical devices, ISO 7405 (biocompatibility evaluation specific to dentistry), and ISO 11737 (sterilization / microbiological methods) for sterilization validation processes when sterility/sterilization is addressed by national/regulatory requirements. Historical predecessor: ISO 6876:2012 (superseded by this 2025 edition).

Keywords

endodontic sealer; root canal sealer; endodontic sealing material; radiopacity; setting time; film thickness; flow; solubility; biocompatibility; ISO 6876:2025; dental materials.

FAQ

Q: What is this standard?

A: ISO 6876:2025 is the International Standard that specifies classification, performance requirements and test methods for endodontic (root‑canal) sealing materials used in dentistry (Edition 4, 2025).

Q: What does it cover?

A: It covers Type 1 materials for conventional orthograde root‑canal obturation and Type 2 materials for other endodontic sealing procedures (apexification, perforation filling, resorption treatment, retrograde root‑end filling). It defines physical, chemical and labelling requirements and test methods; it does not itself set sterility requirements.

Q: Who typically uses it?

A: Manufacturers of endodontic sealers, test laboratories, regulators and conformity-assessment bodies, dental clinicians (especially endodontists), and researchers developing or validating sealer formulations.

Q: Is it current or superseded?

A: ISO 6876:2025 is the current published edition (published November 2025) and supersedes ISO 6876:2012 (withdrawn when the 2025 edition was published).

Q: Is it part of a series?

A: ISO 6876 is a standalone technical standard for endodontic sealing materials but is typically used alongside related dental and medical device standards (for example ISO 10993 for biological evaluation, ISO 7405 for dental biocompatibility guidance, and ISO 11737 for sterilization/bioburden methods where sterilization is applicable).

Q: What are the key keywords?

A: Endodontic sealer, root canal sealer, radiopacity, setting time, flow, film thickness, solubility, biocompatibility, dental materials, ISO 6876:2025.