BS EN ISO 9873:2019 pdf free.Dentistry – Intra-oral mirrors.
handheld dental instrument for intra-oral inspection or inspection and tissue retraction generally comprising the mirror head and the mirror handle Note 1 to entry: See Figure 1. mirror head assembly comprising a glass reflective surface, casing, packing (if present) and stem part of the intra-oral mirror connecting the reflecting surface to the handle.reflecting surface layer applied to the mirror glass for the purpose of reflecting light reflecting layer coated onto the back surface of the mirror glass so that the image can be observed through the glass reflecting layer coated onto the front surface of the mirror glass so that the image can be observed with no intervening glass layer intra-oral mirror whose reflective surface is flat. intra-oral mirror whose reflective surface is concave to produce an enlarged image of the object observed. surface of the mirror glass, excluding the bevel, not enclosed by the metal casing.The metric thread dimensions of the connection between the stem and handle shall be M 2,5 in accordance with ISO 724. The length of the thread engagement shall be as shown in Figure 2. The tolerances shall be in accordance with ISO 965-1 and shall be  for the stem 6e, 一for the handle 6H. The mirror casing shall be made of metal which is resistant to corrosion, e.g. stainless steel or a plated non-ferrous alloy.  Examples of suitable stainless steel or other metal alloys can be found in ISO 7153-1. The material is left to the discretion of the manufacturer provided that it is in accordance with the requirements of this document. Mirror handles shall be made of metal which is resistant to corrosion, e.g. stainless steel or a plated non-ferrous alloy. Examples of suitable stainless steel or other metal alloys can be found in ISO 7153-1. The material for the plastic mirror handle is left to the discretion of the manufacturer provided that it is in accordance with the requirements of this document. BS EN ISO 9873 pdf download.