Dr. Kenji Ojima

Japan

  • Graduated from Showa University School of Dentistry
  • After graduation, worked in several orthodontic practices in Tokyo
  • Founded “Hongo Sakura Orthodontics” in Bunkyo-ku, Tokyo in 2007
  • Specializes in aligner orthodontics treatment and has been involved in

          over 4500 cases

  • Visited Dr. Werner Schupp in Germany for further training and

          aligner education.

  • Founded the Japan Academy of Aligner Orthodontics in 2014
  • Published a paper on accelerated Invisalign treatment in JCO in 2014
  • Received the Oral Presentation Award at the Italian Orthodontic Society meeting in 2014
  • Has given over 50 international lectures in more than 50 countries
  • Mentored by Dr. Junji Sugawara for Surgery First Approach
  • Started incorporating In-House Aligners using Shape Memory Aligners in 2022
  • Founded Smile Innovation Orthodontics in Shinjuku in 2015
  • Founded Ginza Sakura Orthodontics in Ginza in 2022


  • Director of Medical Corporation Smile Innovation
  • President of Japan Academy of Aligner Orthodontics
  • Adjunct Professor in Orthodontics at the University of Torino, Italy
  • Editor of the Journal of Aligner Orthodontics at Quintessence
  • Former Invisalign clinical speaker and faculty

Publication:

  • "Aligner Generation: Dr. Kenji Ojima's 131 Techniques & Analysis Points"

          Authors: Kenji Ojima (Editor), Chisato Dan, Hitoshi Watanabe,

          Yuriko Kumagai

          Publisher: Quintessence Japan, 2025


  • Abstract

    Direct-Printed Aligners: Advancing Precision and Efficiency in Orthodontic Care


    This lecture examines the transformative impact of direct 3D-printed aligners on modern orthodontic practices, focusing on the innovative use of methacrylate-based photopolymer resin (Shape memory clear aligner resin) approved for clinical applications. Participants will explore the clinical advantages of these aligners, including their customizable design

    features for precise force delivery, such as variable thickness, cutouts, and bite ramps. 


    The session will also outline the production workflow, from digital setup and 3D printing to post-processing, emphasizing the enhanced efficiency and accuracy of this technology. By the end, attendees will gain insights into how 3D-printed aligners improve treatment outcomes, expand clinical possibilities, and streamline orthodontic workflows. Join us to discover how direct 3D printing is reshaping orthodontic care.


    Learning Objective


    1. Evaluate the clinical advantages of direct 3D-printed aligners, including customizable

    design features like variable thickness, cutouts, and bite ramps, to enhance treatment precision and efficiency.


    2. Understand the complete production workflow for 3D-printed aligners, from digital setup and 3D printing to post-processing, and apply these steps to streamline orthodontic workflows.


    3. Analyze the material properties of TC-85DAC resin, including its biomechanical and

    clinical benefits, to determine its suitability for specific orthodontic applications.

Download Abstract