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Testing Solutions » By Standard » ISO » ISO 20795-1 & 20795-2

ISO 20795-1 and 20795-2 Flexure Test of Base Polymers

Specimen

  • Biomateriał
  • Prostokątna

Standard

  • ISO 20795-1
  • ISO 20795-2

Materials

  • Inżynieria Biomedyczna
  • Biomateriały

Business Sector

  • Biomedical/Medical/Healthcare

Test Types

  • Giętkość/zginanie
Contact usView Accessories Catalog
  • Description
  • Literature

Dental restorative and prosthodontics materials experience stresses caused by mastication action once they are in the mouth. Each dental material may respond to the stresses differently and in some cases, deformation can occur.  For example, the porcelain portion of the dental crown can chip or break off while biting down on hard food. Therefore, evaluating the mechanical properties of dental materials can be useful to establish their functions and predict the long-term clinical performance.

ISO 20795 Dentistry – Base Polymers Part 1: Denture-Base Polymers and Part 2: Orthodontic-Base Polymers specify the requirements for denture and orthodontic base polymers and copolymers used in dental applications. Test methods that are used to determine compliance with these requirements are also specified in the standards. One of the tests is the three-point flexure test, which measures the ultimate flexure strength and modulus of the polymers using 3.2 mm diameter anvils placed 50 mm apart. For instance, in accordance to ISO 20795-1, dental cements of type 1, 3, 4, and 5 should have minimum ultimate flexure strength of 65 MPa for at least 4 out of 5 tested specimens.

To meet the requirements of ISO 20795-1, we used a custom 3-point flexure fixture with a temperature-controlled bath. The temperature of the specimen was maintained at 37° C (±1°) to simulate in-vivo conditions. The setup shown in the picture was mounted onto an ElectroPuls™ Test System and the test was controlled by our 3 Software®Bluehill. However, since this is a quasi-static test, it can also be easily carried out on either a 3300 or 5900 Electromechanical Testing Machine.

We recommend that you review ISO 20795 to fully understand its requirements.

Interested in other types of test for dental materials or dental implants? We have a variety of solutions for testing of dental materials and implants.

5900 Series Premier Testing Systems Brochure

5900 Universal Testing Systems are engineered for precision, built for durability, and offer the flexibility for changing requirements. They are designed with standard and optional features that increase testing efficiency and improve the testing experience for the operator. A wide range of models are available for testing capacities from < 100N up to 600kN.

  • Products
  • 1/22/2019
  • 6.8 MB

ElectroPuls™ E1000 All-Electric Dynamic Test Instrument

The ElectroPulsTM E1000 is a state-of-the-art, all-electric test instrument designed for dynamic and static testing on a wide range of materials and components. It includes Instron® advanced digital control electronics, DynacellTM load cell, Console software, and the very latest in testing technology – hassle-free tuning based on specimen stiffness, electrically operated crosshead lifts, a T-slot table for flexible test set ups, and a host of other user-orientated features. Powered from a single-phase supply it requires no additional utilities for basic machine operation (for example, pneumatic air, hydraulics, or water).

  • Products
  • 3/3/2017
  • 0.7 MB

ElectroPuls™ E3000 All-Electric Dynamic Test Instrument

The ElectroPulsTM E3000 is a state-of-the-art, all-electric test instrument designed for dynamic and static testing on a wide range of materials and components. It includes Instron® advanced digital control electronics, DynacellTM load cell, Console software, and the very latest in testing technology–hassle-free tuning based on specimen stiffness, electrically operated crosshead lifts, a T-slot table for flexible test set ups and a host of other user-orientated features. Powered from a single-phase supply it requires no additional utilities for basic machine operation (for example, pneumatic air, hydraulics, or water).

  • Products
  • 3/3/2017
  • 0.7 MB

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