ISO 21606:2007适用于所有弹性体助剂，包括用于口内外口腔正畸的正畸弹性体，弹性带，链，连接，线和连线，以及固定和可移除的器具

ISO 21606:2007 is applicable to all elastomeric auxiliaries including orthodontic elastics, elastomeric bands, chains, links, thread and ligatures used for orthodontics both inside and outside the mouth, in conjunction with fixed and removable appliances.