YY 0271.2-2024Dentistry - Water-based cements - Part 2: Resin-modified cements (English PDF)

YY 0271.2-2024 is the English-translated version of 牙科学 水基水门汀 第2部分：树脂改性水门汀.

YY 0271.2 is the mandatory standard for resin-modified glass ionomer and related water-based dental cements, the materials used to lute crowns and to restore teeth where a chemical bond to tooth structure and fluoride release matter more than maximum strength. It is Part 2 of the Chinese water-based cement series, the counterpart of the powder-liquid acid-base cements in Part 1, and it corresponds to the international standard for the same materials. The properties it controls are the ones a dentist experiences at the chair and the patient experiences afterwards: working and setting time, film thickness for luting, flexural strength, radiopacity and colour stability. The YY prefix without /T makes compliance compulsory in China. For a manufacturer or an importer of dental cements, this is the governing document.

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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 17 pages — is available in the English PDF.

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