ISO 22674:2022 歯科 — 固定および取り外し可能な修復および装具用の金属材料 | ページ 6

3.1

additive manufacturing

process of joining materials to make parts from 3D model data, usually layer upon layer, as opposed to subtractive manufacturing (3.19) and formative manufacturing methodologies

[SOURCE:ISO/ASTM 52900:2021, 3.1.2, modified — Notes 1 and 2 to entry have been deleted.]

3.2

appliance

prefabricated metallic device such as attachments and bars

3.3

as-cast state

metallurgical condition of the metallic material (3.15) in its solid state when removed from the casting machine

Note 1 to entry: This condition is dependent upon the manufacturer’s recommended cooling procedure (e.g. bench cooling).

3.4

base metal

metallic element, with the exception of noble metals (3.16) and silver

3.5

base-metal alloy

alloy having a base metal (3.4) as the principal element

3.6

bench-cooling

process whereby a casting is retained in its investment with exposed metal uppermost and placed on a flat, insulating surface at ambient temperature in freely circulating air until its temperature falls to ambient

3.7

casting alloy

metallic material (3.15) designed for casting into an investment mould

3.8

ceramic veneer

thin ceramic surface layer present on a metallic material (3.15) restoration to provide an aesthetic effect

3.9

elastic modulus

Young's modulus

ratio of elastic stress to elastic strain

3.10

hardening

heat-treatment of a metallic material (3.15) producing a condition which provides a higher 0,2 % proof stress than the as-cast state (3.3)

Note 1 to entry: If recommended by the manufacturer, explicit instructions are required in the instructions for use.

3.11

hazardous element

element that is known for its potential to produce an adverse biological effect

Note 1 to entry: The presence of such an element (as an alloying addition or as an impurity) in a dental alloy does not imply that the alloy, in itself, is hazardous.

3.12

heat treatment

thermal treatment of a metallic material (3.15) such as a material stress relieving process, including softening (3.18) , hardening (3.10) , ceramic firing

3.13

metal-ceramic restoration

dental restoration with a ceramic veneer (3.8) bonded to a metallic material (3.15) substructure by firing

Note 1 to entry: This can apply also to the metallic material used for such a restoration. In this context, metal-ceramic alloy is a synonym.

Note 2 to entry: If recommended, such a metallic material may be used without a ceramic veneer.

3.14

metallic base

metal with highest concentration by mass fraction in the alloy

3.15

metallic material

material with properties that are associated with an alloy, noble metal (3.16) or base metal (3.4)

Note 1 to entry: This may be a pure element, commercially pure metal or an alloy.

3.16

noble metal

metal containing gold, metal of the platinum group and/or rhenium

3.17

one-surface inlay

inlay restoration that is exposed to the oral environment on one and no more of the surfaces that are used to define the tooth for the purposes of charting

3.18

softening

heat-treatment of a metallic material (3.15) producing a condition which provides a lower 0,2 % proof stress than the as-cast state (3.3)

Note 1 to entry: If recommended by the manufacturer, explicit instructions are required in the instructions for use.

3.19

subtractive manufacturing

manufacturing process where a solid material such as milling blank is reduced by milling, grinding, eroding or similar techniques to the final shape