Dentistry. Base polymers - Orthodontic base polymers

BS EN ISO 20795-2:2010 Dentistry. Base polymers. Orthodontic base polymers

BS EN ISO 20795-2 specifies requirements for orthodontic base polymers and copolymers used in the construction of both active and passive orthodontic appliances.

BS EN ISO 20795-2 also specifies test methods to be used in determining compliance with these requirements.

BS EN ISO 20795-2 further specifies requirements with respect to packaging and marking the products and to the instructions to be supplied for use of these materials.

BS EN ISO 20795-2:

Foreword

Introduction

1 Scope

2 Normative references

3 Terms and definitions

4 Classification

5 Requirements

5.1 Unpolymerized material

5.2 Polymerized material

6 Sampling

7 Preparation of specimen plates and test specimens

7.1 Laboratory environment

7.2 Procedures

7.3 Special equipment

8 Test methods

8.1 Inspection for compliance determination

8.2 Colour

8.3 Polishability, freedom from porosity, ultimate flexural strength and flexural modulus

8.4 Fracture toughness with a modified bending test

8.5 Residual methyl methacrylate monomer

8.6 Plasticiser(s), where applicable

8.7 Water sorption and solubility

9 Requirements for labelling, marking, packaging and instructions supplied by manufacturer

9.1 Packaging

9.2 Marking of outer packages and containers

9.3 Manufacturer's instructions

Annex A (normative) HPLC method for determination of MMA content

Bibliography