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ANSI/ADA 139-2020 (R2025)
Dentistry - Dental Base Polymers
Part 1 of this standard classifies denture base polymers and copolymers and specifies their requirements. It also specifies the test methods to be used in determining compliance with these requirements. It further specifies requirements with respect to packaging and marking the products and to the instructions to be supplied for use of these materials. Furthermore, it applies to denture base polymers for which the manufacturer claims that the material has improved impact resistance. It also specifies the respective requirement and the test method to be used. Part 2 is applicable to orthodontic base polymers and copolymers used in the construction of both active and passive orthodontic appliances and specifies their requirements. It also specifies test methods to be used in determining compliance with these requirements. It further specifies requirements with respect to packaging and marking the products and to the instructions to be supplied for use of these materials. This is a modified adoption of ISO 20795-1:2013 and and ISO 20795-2:2013, Dentistry – Base polymers - Part 2: Orthodontic base polymers.
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American Dental Association [ada]