This part of YY 0271 specifies requirements and test methods for powder/liquid acid-base dental cements intended for permanent cementation, lining and restoration. This part of YY 0271 is applicable to both hand-mixed and capsulated cements for mechanical mixing.
This part specifies limits for each of the properties according to whether the cement is intended for use as a luting agent, a base or liner or as a restorative material. This part is not intended to address resin-modified water-based cements.
2 Normative references
The following referenced documents are indispensable for the application 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 2590 General method for the determination of arsenic - Silver diethyldithiocarbamate photometric method
ISO 3665:1996 Photography - Intra-oral dental radiographic film - Specification
ISO 3696 Water for analytical laboratory use - Specification and test methods
ISO 7491 Dental materials - Determination of colour stability
3 Terms and definitions
For the purposes of this standard, the following terms and definitions apply.
3.1
mixing time
that part of the working time required in order to obtain a satisfactory mix of the components
3.2
working time
period of time, measured from the start of mixing, during which it is possible to manipulate a dental material without an adverse effect on its properties
3.3
net setting time
period of time, measured from the end of mixing, until the material has set according to the parameters and conditions specified in Annex A
Note: For the purposes of this part of YY 0271, in view of the wide variation in mixing times of cements, the net setting time is determined from the end of mixing.
