ISO 15854:2021 pdf download

ISO 15854:2021 pdf download

ISO 15854:2021 pdf download.Dentistry — Casting and baseplate waxes
1 Scope
This document specifies the classification of and requirements for dental casting and dental baseplate waxes together with the test methods to be employed to determine compliance with these requirements.This document does not apply to waxes supplied for additive manufacturing or CAD/CAM-based procedures.
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一Vocabulary
ISO 6873, Dentistry一Gypsum products
ISO 8601-1, Date and time – Representations for information interchange一Part 1: Basic rules
ISO 8601-2, Date and time一Representations for information interchange一Part 2: Extensions
ISO 22112, Dentistry一Artificial teeth for dental prostheses
3 Terms and definitions .
For the purposes of this document, the terms and definitions given in ISO 1942 and the following apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
– ISO Online browsing platform: available at https://www.iso .org/obp
– IEC Electropedia: available at http:/ /www.electropedia .org/
3.1 casting wax
mouldable material with minimal residue on ignition suitable primarily for shaping patterns in the production of cast restorations using the “Ilost-wax” technique
3.2 baseplate wax
mouldable material primarily for forming occlusion rims, positioning and retaining artificial teeth therein, and shaping patterns that are duplicated in the denture base polymer
3.3 melting point
temperature above which no solid material exists at equilibrium
Note 1 to entry: For the practical purposes of this document, the melting point and the freezing point shall be considered as being the same.
5.6 Behaviour on softening (Type 2)
The wax shall soften without becoming sticky or crumbly and shall be mouldable without breaking or delaminating when tested in accordance with 8.6.
This requirement shall not apply to baseplate preforms where a suitable square test piece cannot be cut.
5.7 Residue on artificial teeth (Type 2])
The wax shall not leave a visible residue on either ceramic or synthetic polymer teeth when tested in accordance with 87.
5.8 Behaviour of colouring material (Type 2)
The colouring material shall neither separate from the wax nor impregnate the gypsum mould when tested in accordance with 87.
5.9 Adhesion on storage (Type 2)
Adhesion due to storage of the wax shall be such that, when tested in accordance with 8.8, there shall be no evidence of damage to wax surfaces. Wax and separating paper surfaces shall separate cleanly and readily.
NOTE The separating paper might not cover the whole area of the wax sheet.