ISO 9693:2019 pdf download.Dentistry – Compatibility testing for metal-ceramic and ceramic-ceramic systems.
Dental veneering ceramics and metal alloys or substructure ceramics are suitable materials for the fabrication of dental restorations. Compatibility between the veneering ceramic and the substructure material under mechanical and thermal loading is essential if they are to function in a prosthetic construction.
ISO 9693 specifies requirements and test methods for assessing the risk of failure associated with masticatory forces and the oral environment.
ISO 9693 specifies requirements and test methods toassess the thermomechanical compatibility between a veneering ceramic and a metallic or ceramic substructure material used for dental restorations.
ISO 9693 applies only to the materials used in combination. Conformity cannot be claimed for a single material.
For requirements for ceramic materials, see Iso 6872. For requirements for metallic materials see
ISO 22674.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of ISO 9693. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 1942, Dentistry — Vocabulary
Specific qualitative and quantitative test methods for demonstrating freedom from unacceptable biological risks are not included in ISO 9693, but it is recommended that, for the assessment of such biological risks, reference be made to ISO 10993-1 and ISO 7405.
4.2 Physical properties
4.2.1 General
The individual component materials shall fulfil the requirements of ISO 6872 for ceramics or ISO 22674 for metallic materials. The materials shall also be in accordance with the requirements of 4.2.2 to 4.2.4 where applicable.
In particular, the elastic modulus of the substrate material shall be determined in order to interpret the measurements in the de-bonding test.
6.1.1 Metallic materials
Test methods for metallic materials shall be in accordance with ISO 22674:2016, 8.13.
6.1.2 Ceramic materials
Test methods for ceramic materials shall be in accordance with ISO 6872:2015, 7.4.
6.2 Glass transition temperature
The glass transition temperature shall be determined in accordance with ISO 6872:2015, 7.5.
6.3 Young’s modulus
Test methods for elastic modulus of metallic materials shall be in accordance with ISO 22674:2016, 5.5.
Prepare, according to the instructions for use, either at least one veneered prosthesis of three units (bridgework, with the geometry of tooth positions 11 to 13 or 14 to 16) or, if multiple units are not indicated, at least five anterior crowns (geometry of tooth position 11 or 21). Apply the veneer to the substructure material with at least two firings.
NOTE The numerical tooth designations are in accordance with ISO 3950.
6.5.3 Thermocycling test with fixed temperature interval
6.5.3.1 Apparatus
6.5.3.1.1 Container with cold water maintained at (10 ± 10) °C.
6.5.3.1.2 Container with water maintained at its boiling point.ISO-9693-2019