ISO 9693:2019 pdf download

ISO 9693:2019 pdf download.Dentistry — Compatibility testing for metal-ceramic and ceramic-ceramic systems
1 Scope
This document specifies requirements and test methods to assess the thermomechanical compatibility between a veneering ceramic and a metallic or ceramic substructure material used for dental restorations. This document 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 this document. 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
ISO 6872:2015, Dentistry — Ceramic materials
ISO 22674:2016, Dentistry — Metallic materials for fixed and removable restorations and appliances
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 1942, ISO 6872, ISO 22674 and the following apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
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3.1 veneering ceramic
full structure of fired ceramic layers applied to a substrate material
3.2 conditioning
process of treating the substructure to enhance the bonding of the veneering ceramic (3.1)
3.3 liner
substance, applied to the substructure and fired under appropriate time-temperature conditions,with the purpose to improve aesthetics and/or adherence of the veneering ceramic to the coated substructure-surface
6.4.2 Preparation of test specimens
Prepare six specimens (either six metallic or six zirconia) with a size of (25 ± 1) mm × (3 ± 0,1) mm × (0,5 ± 0,05) mm in accordance with the manufacturer’s procedure for processing the substructures for prostheses. Condition the specimens and follow the procedure described in the instructions for use (e.g. cleaning, sandblasting, oxidation). Before applying the ceramic to the test specimens, calibrate the furnace according to the manufacturer’s recommendation and test-fire the ceramic material to obtain the appropriate firing grade and surface gloss of the veneering ceramic materials. If necessary, adjust the firing temperatures or holding times. According to the instructions for use, add dental veneering ceramic to each specimen to form a total ceramic thickness of (1,1 ± 0,1) mm after firing (see Figure 1). The ceramic layer shall have a rectangular shape and extend the full 3 mm width of the substrate. If necessary add additional dental veneering ceramic to obtain the required thickness and shape, and fire it. Carefully trim the rectangular shape with a disc. If necessary remove ceramic from the side of the substructure material in order to keep its overall shape. Submit each specimen to a glaze firing in accordance with the instructions for use.