Dr. George Joji Tsubaki

Short CV

Joji George TSUBAKI –Tokyo-  

    椿 丈二   Teethart Orthodontic Office

Cerulean Tower Tokyu Hotel 3F, 26-1

Sakuragaoka Shibuya-ku

Tokyo, 150-0031 Japan

TEL: +81-3-3464-8211,

FAX: +81-3-3464-8245

E-mail: george@teethart.com


Nippon Dental University, Tokyo, Japan     D.D.S.  1991

Japan Orthodontic Society, Tokyo Orthodontic Society Social Member-             

Japan Lingual Orthodontic Association       -The Board Member -

2015~  President of JLOA

Japan Association of Adult Orthodontics    -Specialty Certified Member –

-The Board Member –

European Society of Lingual Orthodontics    -Active Member-

-Titular Membership-

2015~ Chairman of Organizing Committee

World Society of Lingual Orthodontics       -Active Member-

Asian Meeting of Lingual Orthodontics

2015~ Chairman of Organizing Committee

Publications: 2009 「Lingual Bracket Orthodontic Technique 」

2015 「Lingual Orthodontic technique Question & Answer 60」






Title: Analysis of differences between analog and digital setups with over-torque for the maxillary incisors and their limits


Objectives: There are a variety of methods available for adding positive torque to the maxillary incisors. They are roughly divided into two categories: extra torque is incorporated into either the arch-wire or the setup model. The latter has not yet been established in many aspects. This presentation discusses differences between digital and analog setups, as well as differences among appliances used, with regard to the method, criteria and limit of over-torque incorporation into the setup model.

Methodologies: Changes in horizontal and vertical bracket positions were measured when incorporating over-torque for the maxillary incisors into analog and digital setup models in Japanese patients with average crown heights. Bracket positions with clinically tolerated maximum over-torque were analyzed in relation to the morphology of lingual crown surfaces for brackets widely used in Japan excluding customized brackets.

Results: The analysis revealed differences in over-torque limit (bracket position with maximum over-torque) among the brackets used for measurement, and points to consider for analog and digital setups.

Conclusions: These results suggest that the establishment of a standardized method of incorporating over-torque and over-corrections for the maxillary incisors would contribute to the enhancement of treatment efficiency in lingual practice.