Jun,10

BS EN ISO 9873:2019 pdf – Dentistry – Intra-oral mirrors

BS EN ISO 9873:2019 pdf – Dentistry – Intra-oral mirrors

BS EN ISO 9873:2019 pdf – Dentistry – Intra-oral mirrors.
1 Scope This document specifies requirements and test methods for reusable intra-oral mirrors with a coated glass reflecting surface used for dental purposes in the oral cavity. In addition, specific requirements for metallic casing and metallic handles are given. 2 Normative references The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 263, ISO inch screw threads — General plan and selection for screws, bolts and nuts — Diameter range 0,06 to 6 inch ISO 724, ISO general-purpose metric screw threads — Basic dimensions ISO 965-1, ISO general purpose metric screw threads — Tolerances — Part 1: Principles and basic data ISO 1942, Dentistry — Vocabulary ISO 5864, ISO inch screw threads — Allowances and tolerances ISO 17664, Processing of health care products — Information to be provided by the medical device manufacturer for the processing of medical devices 3? Terms? and? definitions For the purposes of this document, the terms and definitions given in ISO 1942 and the following apply. ISO and IEC maintain terminological databases for use in standardization at the following addresses: — ISO Online browsing platform: available at https://www.iso.org/obp — IEC Electropedia: available at http://www.electropedia.org/ 3.1 intra-oral mirror mouth mirror 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. 3.2 mirror head assembly comprising a glass reflective surface, casing, packing (if present) and stem 3.3 stem part of the intra-oral mirror connecting the reflecting surface to the handle
3.4 reflecting? surface layer applied to the mirror glass for the purpose of reflecting light 3.5 reflecting? back? surface reflecting layer coated onto the back surface of the mirror glass so that the image can be observed through the glass 3.6 reflecting? front? surface reflecting layer coated onto the front surface of the mirror glass so that the image can be observed with no intervening glass layer 3.7 plane mirror intra-oral mirror whose reflective surface is flat 3.8 magnifying mirror intra-oral mirror whose reflective surface is concave to produce an enlarged image of the object observed 3.9 viewing surface surface of the mirror glass, excluding the bevel, not enclosed by the metal casing 3.10 distortion image deformation due to optical defect(s)

4.1.2 Connection between the stem and handle, if applicable 4.1.2.1 One-piece design (not applicable) This requirement is not applicable to intra-oral mirrors with a one-piece design. 4.1.2.2 Two-piece design (applicable) 4.1.2.2.1 Metric thread connection 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, — for the handle 6H. 4.1.2.2.2 Imperial thread connection The imperial thread dimensions of the connection between the stem and handle shall be imperial thread No. 4-48 UNF, in accordance with ISO 263. The length of the thread engagement shall be as shown in Figure 3. The tolerances shall be in accordance with ISO 5864 and shall be — for the stem 2A, — for the handle 2B. 4.1.3 Dimensions of mirror casing and viewing surface Intra-oral mirrors shall meet the dimensions given in Figure 2, Figure 3, and Table 1. 4.1.4 Size designation of mirror head The mirror head size designations are based on the nominal diameter of the casing, d 1 , expressed in millimetres. Each subsequent size increases by 2 mm.

Download
The previous

BS EN ISO 9913-2:2000 pdf - Optics and optical instruments — Contact lenses — Part 2: Determination of oxygen permeability and transmissibility by the coulometric method

The next

BS EN ISO 9809‑3:2019 pdf - Gas cylinders — Design, construction and testing of refillable seamless steel gas cylinders and tubes Part 3: Normalized steel cylinders and tubes

Related Standards