ISO 9873 pdf download.Dental hand instruments – Reusable mirrors and handles
1 Scope
This International Standard specifies requirements and test methods for reusable mouth mirrors with a coated glass reflecting surface and metal casing and metallic handles suitable for dental use in the oral cavity.
2 Normative references
The following standards contain provisions which, through reference in this text, constitute provisions of this International Standard. At the time of publication, the editions indicated were valid. All standards are subject to revision, and parties to agreements based on this International Standard are encouraged to investigate the possibility of applying the most recent editions of the standards indicated below. Members of IEC and IS0 maintain registers of currently valid International Standards. IS0 68-1 :-I), IS0 general-purpose screw threads – Basic profile – Part I: Metric screw threads. IS0 724:1993, IS0 general-purpose metric screw threads – Basic dimensions. IS0 965-1 :- 2), IS0 general-purpose metric screw threads – Tolerances – Part I: Principles and basic data. IS0 1 942-3: 1 989, Dental vocabulary – Part 3: Dental instruments. IS0 3696:1987, Water for analytical laboratory use – Specification and test methods. IS0 71 53-1 :1991, Surgical instruments – Metallic materials – Part 1: Stainless steel. IS0 13402:1995, Surgical and dental hand instruments – Determination of resistance against autoclaving, corrosion and thermal exposure.
3 Definitions
For the purposes of this International Standard, the definitions in IS0 1 942-3 and the following definitions apply. 3.1 mirror intra-oral inspection or inspection and retraction instrument generally comprising the mirror head and the mirror handle 3.2 mirror head assembly comprising a glass reflective surface, casing, packing (if present) and stem 3.3 stem that part of the mirror head connecting the glass and casing 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 dental mirror whose reflective surface is flat 3.8 magnifying mirror dental 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 See figure 1, diameter d2. 3.10 distortion image deformation due to optical defect(s)
4 Requirements
4.1 Dimensions 4.1.1 Overall length The maximum overall length of mirror head plus handle shall be 1 78 mm. If the mirror can be separated from the handle for sterilization, the maximum overall length of 1 78 mm is applicable to each of the separate parts. 4.1.2 Dimensions of connection between stem and handle The dimensions of the connection between stem and handle shall be M 2,5 in accordance with IS0 724. The tolerances for the stem shall be 6e and for the handle 6H, in accordance with IS0 965-1. The length of the thread engagement shall be as shown in figure 1. 4.1.3 Dimensions of mirror casing and viewing surface Dental mirrors shall meet the dimensions given in figure 1 and table 1.4.1.4 Position of mirror head with respect to stem The mirror head shall be positioned such that the long axis of the stem bisects the casing to provide a symmetrical mount about the plane surface of the mirror glasskasing. Test in accordance with 5.1. 4.2 Material 4.2.1 Mirror glass The mirror glass shall be made of polished glass free from visible defects such as waves, chips, scratches and other imperfections observable to the naked eye. Test in accordance with 5.1. The glass or front-surface reflective coating shall show no blemish or other deterioration after having been tested. Test in accordance with 5.2, 5.3, 5.4 and 5.5. 4.2.2 Mirror casing The mirror casing shall be made of a metal which is resistant to corrosion, e.g. stainless steel or a plated non- ferrous alloy. The metal shall show no visible signs of corrosion after having been tested. Any visible blemish on the metal shall be considered as evidence of corrosion. Test in accordance with 5.2, 5.3, 5.4 and 5.5.