Overview
ISO 14233:2003 - "Dentistry - Polymer-based die materials" defines compositional, performance, testing, packaging and user‑information requirements for polymer‑based die materials used in dentistry. The standard applies to die materials whose principal constituent is a polymeric matrix (epoxy, polyurethane or acrylate-based) and is intended primarily for producing laboratory casts from dental impressions for the manufacture of fixed or removable restorations.
Key topics and technical requirements
- Scope and composition: Materials shall be free from extraneous matter and show no deterioration when handled per the manufacturer’s instructions.
- Working time and setting time: The working time must be at least that stated by the manufacturer; at stated setting time the material must meet a minimum Vickers hardness (see below).
- Detail reproduction: Die materials must reproduce a 20 µm wide line continuously when tested using the ruled test block and impression method described in the standard.
- Linear dimensional change: Change after 24 h must be less than 1.0%.
- Vickers hardness (HV 0,2):
- At manufacturer’s stated setting time: not less than 6 HV 0,2.
- At 24 h: must meet the value declared by the manufacturer.
- Testing conditions and methods:
- Standard test environment: 23 ± 2 °C, relative humidity ≥ 30%.
- Test methods include visual inspection, detail reproduction with ruled test block, dimensional measurement with measuring microscope (0.01 mm accuracy), and Vickers hardness testing per ISO 6507‑1.
- Use of compatible elastomeric impression materials conforming to ISO 4823.
- Sampling: Tests use samples from retail packages (≈50 ml material) from the same batch.
- Manufacturer information: Required instructions must include application range, compatible impression types, composition, mixing/proportioning, working/setting times, Vickers hardness, storage and shelf‑life.
- Packaging and marking: Outer pack and containers must carry manufacturer name/address, trade name, method of polymerization, net contents, recommended storage, expiry (year and month per ISO 8601) and batch identification.
Applications and target users
- Practical use: production of accurate dental casts for crown, bridge and removable prosthesis fabrication in dental laboratories.
- Primary users:
- Manufacturers of polymer‑based die materials (product development, QC).
- Dental laboratories and technicians (product selection and validation).
- Testing laboratories and regulatory bodies (conformity testing, certification).
- Procurement and quality managers ensuring supplier compliance.
Related standards
- ISO 4823 - Elastomeric impression materials (compatibility)
- ISO 6507‑1 - Vickers hardness test method
- ISO 6873 - Dental gypsum products (gypsum dies are covered separately)
- ISO 8601 - Date representation (expiry marking)
Keywords: ISO 14233:2003, polymer-based die materials, dentistry, dental laboratory, Vickers hardness, working time, dimensional change, detail reproduction.
