Working toward the international standardizationof dental magnetic attachments- Commission report of the ISO Corresponding Committee in 2011 Y. Takada
Division of Dental Biomaterials, Tohoku University Graduate School of Dentistry

Introduction
The international standardization of dental
magnetic attachments has been continued forover six years since “Development andstandardization of the dental magneticattachment" supported by the NEDO grant wasstarted in 2005. After NWIP (New Work ItemProposal) was presented in ISO/ TC 106/ SC2 in2007 (Berlin meeting), a Japanese draft
established by “The Magnetic attachment
standardizationcommittee(TheISOcorresponding committee in JSMAD)” wasapproved as WD 13017 (Working draft) in 2008
(ISO/ TC 106 Goteborg meeting). WD 13017
was revised to DIS 13017 (Draft of International Standard) in Jun, 2011 through CD 13017(Committee Draft) in ISO/ TC 106 Rio de Janeiro meeting in 2010.
Our activities in ISO/ TC 106 Phoenix meeting in 2011 are reported and you can know progress inISO/ DIS 13017, here.

Working goal in 2011
The Magnetic attachment standardization committee set up the following targets.
1) In ISO/ TC 106 Phoenix meeting which will be held in September, 2011, we get acceptanceof revised DIS 13017 and that of its FDIS voting.
2) We improve jigs used for measuring retentive force in order to standardize measurement
methods and the jigs for the retentive force in detail before long.

Fig. 1

Members of the magnetic attachment standardization committee

Activities
DIS 13017 came into existence by DIS voting for CD 13017 in Jun, 2011 without a dissenting
vote. (Fig.2).

Fig.2 The result of DIS voting in 20th Jun, 2011
The first meeting of the magnetic attachment standardization committee was held in July, 2011 inTokyo, and we set the working goal in 2011. In order to promote DIS 13017 to FDIS 13017, wediscussed answers to comments from P-member countries such as introduction, materialcompositions, hazardous elements, and biocompatibility. After that, we revised the DIS 13017, andconvener of WG 22, Dr. H. Mizutani who was our committee member sent new revised DIS 13017
to experts of P-member countries.
After ISO/ TC 106 Phoenix meeting held in September, 2011, the second meeting of thecommittee was held in Tokyo in November, 2011. The chairman of the committee reported thedetails of SC2/ WG 22 meeting. The convener of WG 22 also revealed that the revised DIS 13017
was approved and that FDIS voting for the DIS 13017 was determined next year (in 2012) in plenaryof TC 106.
We also discussed improvements of jigs used for measuring retentive force with respect to frictionof a liner motion bearing and addition of an X-Y stage for specimens.

ISO/TC 106 Phoenix meeting
Five members of the magnetic attachment standardization committee, Dr. H. Mizutani (convener),Dr. Y. Takada (expert), Dr. Y. Nakamura (expert assistant), Dr. Kent T. Ochiai (convener assistant),and Dr. H. Sasaki (obsever) attended the ISO/TC 106 Phoenix meeting. Reception banquet wasgiven on 18th September by host country (U.S.A.) in Pointe Hilton Tapatio Cliffs Resort. (Figs.3 and4)

Fig.3 Pointe Hilton Tapatio Cliffs Resort

Fig.4 Reception banquet

The five members made an effort to success SC 2/ WG 22 meeting till all hours of the night.
(Fig.5) SC 2/ WG 22 meeting was held on 19th September at the same place. (Fig.6) The revised
DIS 13017 was approved and FDIS voting for the DIS 13017 was determined next year (in 2012) inthe meeting. The short minutes of the meeting was partially shown in Fig.7.

Fig.5 Small hours on previous day of the meeting

Fig.7

Fig.6

SC 2/ WG 22 meeting

A part of the short minutes of the meeting

Improvement of the jig
The committee continuously develops a pilot model of the jig, which can measure the retentive
force with excellent accuracy and reproducibility because of the preparation for ISO/ TC 106 Paris
meeting in 2012. (Fig.8)

Universaljoint

Slide bearing

φ8 shaftX-Y stage

X axismovable knob
X axis lockY axis lockY axis lockY axis movable knob

FrontSideFig.8 A pilot model of the Jig equipped with an X-Y stage and a new slide bearing

Future prospects
The members of the Magnetic Attachment Standardization Committee are looking forward to avoting result of FDIS (Final Draft of International standard) in this year. If FDIS 13017 is carried inthe voting, ISO 13017 (ISO standard of “Dentistry-Magnetic attachments”) will come into the worldin this year. In preparation for ISO/ TC 106 Paris meeting in 2012, the members make a challenge toa new standardization of measurement methods and the jig for the retentive force in magnetic
attachments, now. The members’ activity already allows obtaining the souped-up jig for measuring
retentive force.

To readers,
We will do our utmost to live up to your expectations!
From all members of the Magnetic Attachment Standardization Committee(The ISO corresponding committee in JSMAD)