BS EN ISO 2157:2016 pdf download – Dentistry — Nominal diameters and designation code numbers for rotary instruments (ISO 2157:2016) This International Standard specifies the nominal diameters of the working parts of dental rotary instruments, for example burs, laboratory burs, grinding instruments, diamond instruments, mandrels and the corresponding designation. Excluded are the diameters of endodontic instruments and scaler tips. 2 Normative references The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 3, Preferred numbers — Series of preferred numbers ISO 1942, Dentistry — Vocabulary ISO 6360-1, Dentistry — Number coding system for rotary instruments — Part 1: General characteristics 3 Terms and definitions For the purposes of this document, the terms and definitions given in ISO 1942 and ISO 6360-1 and the following apply. 3.1 code number series of numbers for specific detail information for dental rotary instruments (3.4) or their accessories [SOURCE: ISO 6360-1:2004, 3.3.] 3.2 designation code number resulting designation as derived from the nominal diameter (3.3) 3.3 nominal diameter theoretical value of the diameter 3.4 rotary instrument tool used for rotary or oscillating movements, consisting of a working end, neck (if applicable) and shank, which is constructed to fit into a handpiece Note 1 to entry: This includes continuous rotation or oscillating instruments. Note 2 to entry: See Figure 1. 4 Nominal diameters and designation The nominal diameters, in millimetres, and the designation by code number of the working parts of ental rotary instruments shall be selected from those listed in Table 1, Table 2 and Table 3. In the range of 2,5 mm to 9,5 mm, it is recommended to use the diameters of the R 20 series. This reduces the number of diameters in this area from 21 to 12 (see Table 2). 4 Nominal diameters and designation The nominal diameters, in millimetres, and the designation by code number of the working parts of dental rotary instruments shall be selected from those listed in Table 1, Table 2 and Table 3. In the range of 2,5 mm to 9,5 mm, it is recommended to use the diameters of the R 20 series. This reduces the number of diameters in this area from 21 to 12 (see Table 2).BS EN ISO 2157...
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