1、 CEN ENSISO 13+397-1 95 m 3404589 O132234 751 m BRITISH STANDARD Periodontal curettes, dental scalers and excavators Part 1. General requirements * m * The European Standard EN IS0 13397-1 : 1995 has the status of a British Standard ICs 11.060.20 BS EN IS0 13397-1 : 1996 NO COPYING WITHOUT BSI PERMI
2、SSION EXCEPT AS PERMITTED BY COPYRIGKT LAW CEN EN*ISO 33*397-L 95 I 3404589 0332235 698 I AmdNo. BS EN IS0 13397-1 : 1996 Date Textaffected Committees responsible for this British Standard The prepdon of this British Standard was entrusted to Technical Committee CW52, Dental instruments, upon which
3、the following bodies were represented: British Dental Association British Dentai kade Association British Endodontic Society British Society for Restorative Dentistry British Society for the Study of prosthetic Den- DepaItrnent of Health Ministry of Defence This British Standard, having been prepare
4、d under the direction of the Health and Environment Sector Board, was published under the authority of the Standards Board and comes into effect on 15 June 1996 0 BSI 1996 The foiiowing BSI references relate to the work on this standard: commiaee reference Cw52 Draft for comment 9#504196 DC ISBN O 6
5、80 26683 9 - CEN EN*ISO L3*397-L 95 m 3404589 O332236 524 m BS EN IS0 13397-1 : 1996 Contents page Committees responsible Inside front cover National foreword ii Foreword 2 Specification 1 Scope 2 Normative references 3 Definitions 3 3 3 4 Classification 3 6 Material 3 6 Requirements 3 7 Testmeth bl
6、 the instrument is securely held; c) there is an unobstructed view of the working end. A.3.1.3 Ensure that the dental ivstrument is parallel to the micrometer stage by focussing on, and trav- ersing the length of, the handle. If the handle remains in focus over the traversed distance, then the instr
7、u- ment is ready for measurement. If the handle does not remain in focus, repeat A.3.1.2 and A.3.1.3 until the handle remains in focus through the field of traverse. A.3.1.4 Align the centreline of the dental instrument with the vertical and horizontal cross-wires on the projector screen. A.3.2 Hori
8、zontal and vertical measurements A.3.2.1 Refer to the illustration, table of dimensions and table of measurement points related to the in- strument to be measured and, using the micrometer stage, bring the appropriate point of the projected image to either the vertical or horizontal cross-wire, whic
9、hever is appropriate to the datum measuring point of interest. A.3.2.2 Zero the micrometer and move the micro- meter stage to the final measurement position and record the measurement. A.3.2.3 Realign the instrument (A.3.1.4) and repeat steps A.3.2.1 and A.3.2.2 for the remaining dimen- sions. A.3.3
10、 Angular measurements A.3.3.1 Refer to the illustration, table of dimensions and table of measurement points related to the in- strument to be measured and, using the micrometer stage, bring the appropriate point of the projected image to either the vertical or horizontal cross-wire, whichever is ap
11、propriate. A.3.3.2 Rotate the bezel of the projector screen to the datum measuring point and note the angular reading. A.3.3.3 Rotate the bezel to the final measurement position, subtract the initial angular reading from the final reading and record the measured angle. CEN ENSISO 13*397-1 95 = 34045
12、89 0332243 764 Page 6 EN IS0 13397-1 : 1995 Annex ZA (normative) Normative references to international publications with their relevant European publications This European Standard incorporates by dated or undated reference, provisions from other publications. These nonnative references are cited at
13、 the appropriate places in the kxt and the publications are listed herafter. For dated references, subsequent amendments to or revisions of any of these pubications apply to this European Standard only when incorporated in it by amendment or revision. For undated references the latest edition of the
14、 publication referred to applies Publication Year litle EN Year Is0 19423 1989 Dental txxabuh?y - Part 3: Dental instruments EN 21942-3 1993 O BSI 1996 CEN ENWISO 13+397-L 95 W 3404589 0132244 hTO = BS EN IS0 13397-1 : 1996 List of references See national foreword. O BSI 1996 BS EN IS0 13397-1 : 199
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20、g or otherwise - without prior written permission Com BSI. This does not preclude the free use, in the course of implementing the standard, of necessary details such as symbols, and size, type or grade designations. If these details are to be used for any other purpose than implementation then the prior written permission of BSI must be obtained If permission is granted, the terms may include royalty payments or a licensing agreement. Details and advice can be obtained from the Copyright Manager, BSI, 389 Chiswick High Road, London W4 4AL ISBN O 680 25683 9 CW52
