What is ISO/TS 17988 about?
ISO/TS 17988 discusses corrosion test methods for dental amalgam. ISO/TS 17988 outlines the details of test procedures for evaluating the corrosion resistance of dental amalgam formed from products that are within the scopes of ISO 24234 and ISO 20749.
The methods provided in ISO/TS 17988 help in achieving results in a short time and prolong corrosion resistance of dental amalgam.
The results of these tests should not be used for any biocompatibility claims, for which their use is inappropriate.
Note: ISO/TS 17988 does not apply to other metallic materials in which an alloy powder reacts with a liquid alloy to produce a solid metallic material intended for dental restoration.
Who is ISO/TS 17988 for?
ISO/TS 17988 on corrosion test methods for dental amalgam is useful for:
- Dentists
- Dental amalgam manufacturers
- Test centres for dental products
- Regulatory authorities
Why should you use ISO/TS 17988?
These corrosion test methods are laboratory procedures for evaluating the relative performances of dental amalgam alloy products. They are designed to produce a measurable effect (and differences between products) within a relatively short time, a period-appropriate for a comparative laboratory evaluation.
ISO/TS 17988 guideline helps you with the preparation of dental amalgam test-pieces and determination of the resistance to corrosion by the immersion procedure, corrosion by the potentiostatic procedure, and resistance to corrosion by the hertzian-loading strength reduction test for corrosion test for dental amalgam. This helps in improving the performances of dental amalgam alloy products and methods are designed to produce a measurable effect within a relatively short time.
What’s changed since the last update?
PD ISO/TS 17988:2020 supersedes ISO/TS 17988:2014, which has been withdrawn. PD ISO/TS 17988:2020 has some technical changes with respect to ISO/TS 17988:2014. These include:
- The scope has been extended to include products that are within the scope of ISO 20749
- Clause 3 includes additional terms and definitions
- Clause 4: quantities required to produce test-pieces for each of the three test procedures are given now as the mass of dental amalgam alloy per test-piece, in place of the total mass of dental amalgam alloy for the complete test (i.e., the estimated quantity for all test-pieces including permitted replacements).
- 5.2.2.2 and 5.3.2: the parameter Ra has replaced Rk to specify surface roughness on steel moulds.
- 5.3.2: the surface roughness of the tapered hole in the Hertzian-indentation strength-reduction test-piece mould has been revised.
