A Reference number ISO 1 3397 4 1 997(E) INTERNATIONAL STANDARD ISO 1 3397 4 First edition 1 997 1 2 1 5 Periodontal curettes, dental scalers and excavators — Part 4 Dental excavators — Discoid type C[.]
INTERNATIONAL STANDARD I SO 397-4 First edition 997-1 2-1 Peri o d on tal cu rettes, d en tal scal ers an d excavators — Part 4: Dental excavators — Discoid type Curettes parodontales, instruments dentaires pour détartrage et excavateurs dentaires — Partie 4: Excavateurs dentaires — Type discoïde A Reference number ISO 3397-4:1 997(E) I SO 339 7-4: 97(E) Fo rewo rd ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies) The work of preparing International Standards is normally carried out through ISO technical committees Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization Draft International Standards adopted by the technical committees are circulated to the member bodies for voting Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote International Standard ISO 3397-4 was prepared by Technical Committee ISO/TC 06, Dentistry , Subcommittee 4, Dental instruments ISO 3397 consists of the following parts, under the general title Periodontal curettes, dental scalers and excavators: Part : General requirements Part 2: Periodontal curettes — Gr-type Part 3: Dental scalers — H-type Part 4: Dental excavators — Discoid-type It is anticipated that additional types of instruments will form the subject of future parts © ISO 997 All rights reserved Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from the publisher International Organization for Standardization Case postale 56 • CH-1 21 Genève 20 • Switzerland Internet central@iso.ch X.400 c=ch; a=400net; p=iso; o=isocs; s=central Printed in Switzerland ii I N TERN ATI ON AL STAN DARD © ISO I SO 33 97-4: 97(E) Peri od on tal cu rettes, d en tal scal ers an d excavators — Part 4: Dental excavators — Discoid type Sco pe This part of ISO 3397 specifies the dimensions for dental excavators with discoid working ends N o rm ati ve referen ces The following standards contains provisions which, through reference in this text, constitute provisions of this part of ISO 3397 At the time of publication, the editions indicated were valid All standards are subject to revision, and parties to agreements based on this part of ISO 3397 are encouraged to investigate the possibility of applying the most recent editions of the standards indicated below Members of IEC and ISO maintain registers of currently valid International Standards ISO 942-3:1 989, Dental vocabulary — Part 3: Dental instruments ISO 3397-1 :1 995, Periodontal curettes, dental scalers and excavators — Part : General requirements Defi n i ti o n s For the purposes of this part of ISO 3397, the definitions given in ISO 942-3 apply 4 Desi g n an d d i m en si o n s G en eral General requirements for dental excavators are specified in ISO 3397-1 The classification of forms of dental excavator is given in table © I SO 397-4: 997(E ) Tabl e ISO — Cl assi fi cati on of excavator form s Form Sh ap e Cl assi fi cati on A Straight 00 B Angled 200 C Contra-angled 300 D Angled, complex 400 Dental excavators shall have the designs shown in figures to and the dimensions as given in table The points of measurement associated with the dimensions are listed in table Annex A of ISO 3397-1 :1 995 provides details of one method of measurement applicable to most types of dental hand instrument Overal l l en g th The maximum overall length, irrespective of the design of the instrument, shall be 78 mm Test u n d er to rq u e For dental excavators, subject the union between the working end and the handle to a torque of 200 N for a duration of at last s • cm D esi g n ati o n an d m arki n g The manufacturer should include in the catalogue and on the package of the product the number of this International Standard (ISO 3397-4) followed by an oblique stroke and the number indicating the type of excavator as shown in table EXAMPLE: an excavator of form C, type 301 , should be designated as follows: I SO 3397-4/301 © ISO I SO 339 7-4: 99 7(E ) Tabl e — Di m en si on s of d i scoi d -type excavators Dimensions in millimetres (angular dimensions in degrees) b1 b2 b3 b4 h1 h2