CSN EN ISO 18556 This International Standard specifies requirements and their test methods for metallic and non-metallic intraoral spatulas used to introduce and model filling materials into a tooth cavity, including single use disposable items. NOTE: This includes instruments used for placement and contouring of non-metallic direct restorative materials. It also specifies requirements for their marking and labelling. Original English text of CSN EN Standard. The price of the Standard included all amendments and correcturs.