Meet the Inventor
Dr. Otsuka Atsushi
Tokyo Dental College · DDS, MD, Orthodontist
Otsuka Orthodontic Clinic
Inventor of Preortho
Preortho Chief Clinical Consultant
Trusted by clinicians, designed for children
More than a decade of documented cases shaped every detail of Preortho — the appliance design, the sizing, and the treatment protocol.
30 Years of Clinical Practice
Dr. Otsuka Atsushi is an orthodontist with thirty years of clinical experience. Preortho grew out of more than a decade of documented cases, developed with a single aim: meaningful results for young patients, achieved comfortably.
His textbook, published by Quintessence, remains the clinical foundation behind every Preortho appliance.
The Science Behind the System
About Preortho Book
Before Preortho became a trusted system for clinicians worldwide, it was built case by case, documented, tested, and refined over a decade.
Co-authored by Dr. Otsuka Atsushi and leading Korean orthodontists, this book captures the full science and clinical methodology behind myofunctional appliance therapy. It is essential reading for any practitioner who wants to understand not just how to use Preortho, but why it works.
Preortho Book
Curious about what the book covers? Watch the official introduction video to get a closer look at the clinical content, case studies, and methodology that make Preortho the system it is today.
Preortho Training Book
The Preortho Training Book is a step-by-step practical guide for clinicians and dental staff. Covering correct fitting, patient instructions, and common mistakes to avoid, this 190-page workbook ensures every patient gets the most out of their Preortho appliance from day one.