ISO 15854:2021 Dentistry — Casting and baseplate waxes
标准简介
Dentistry — Casting and baseplate waxes是ISO于2021-01发布的ISO标准，适用于全球范围。标准截图
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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 — Vocabulary
ISO 6873, Dentistry — Gypsum products
ISO 8601-1, Date and time — Representations for information interchange — Part 1: Basic rules
ISO 8601-2, Date and time — Representations for information interchange — Part 2: Extensions
ISO 22112, Dentistry — Artificial teeth for dental prostheses
3 Terms a nd definiti ons
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://w ww .iso. org/ obp
— IEC Electropedia: available at http://w ww .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 “lost-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.
4 Classific ation
Dental waxes covered by this document are classified according to the flow characteristics that represent their hardness, as follows:
a) Type 1 (casting wax):
1) Class 1 Soft;
2) Class 2 Hard;
b) Type 2 (baseplate wax):
1) Class 1 Soft;
2) Class 2 Hard;
3) Class 3 Extra hard.
5 Requirements
5.1 Appearance
The wax shall be uniform in colour, supplied in pieces of uniform size, of smooth texture and free of foreign materials. Test in accordance with 8.1.
5.2 Flow
The wax when tested in accordance with 8.2 shall have flow values conforming with the appropriate requirements in Table 1.
Table 1 — Flow requirements percentages
Type 1 Type 2
Temperature
Class 1 Class 2 Class 1 Class 2 Class 3
°C
min. max. min. max. min. max. min. max. min. max.
23,0 ± 0,2 — — — — — 1,0 — 0,6 — 0,2
30,0 ± 0,2 — 1,0 — — — — — — — —
37,0 ± 0,1 — — — 1,0 5,0 90,0 — 10,0 — 1,2
40,0 ± 0,1 50,0 — — 20,0 — — — — — —
45,0 ± 0,1 70,0 90,0 70,0 90,0 — — 50,0 90,0 5,0 50,0
— not required
5.3 Behaviour on trimming
The wax shall be capable of being trimmed without chipping, flaking, or other undesirable behaviour when tested in accordance with 8.3.
5.4 Behaviour on softening (Type 1)
The wax shall soften without flaking or crumbling and shall cohere readily when tested in accordance with 8.4.
5.5 Appearance after f laming (Type 2)
The wax shall present a smooth glossy surface when tested in accordance with 8.5.
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