When treatment stops here
The curve remains deep after leveling. Anterior intrusion does not behave as expected. You want to avoid unwanted premolar intrusion. The finishing occlusion does not settle.
MASTERING THE CURVE OF SPEE
When the Curve of Spee does not level easily, what else can we do?
A clinical seminar from X UNIVERSITY on what to do when Spee correction stalls. We will organize classic approaches such as U-arch, slot selection, and stiffer wires, then focus on other powerful clinical options, including premolar extrusion, TAD-supported control, and aligner perspectives. The English edition is a translated archive, not live interpretation.
Payment is handled securely by Stripe.
This is not just a collection of tricks. It is a 2.5-hour clinical map for when Spee correction gets stuck.
We will connect anterior intrusion, premolar extrusion, TAD-supported control, U-arch, slot and wire-size decisions, and aligner perspectives into treatment sequencing.
A clinical decision map
We organize when to use anterior intrusion, premolar extrusion, TAD support, U-arch, slot or wire-size changes, and aligner planning.
Questions are welcome by email
The live Q&A will be in Japanese, but you can email questions in advance. Please do not send identifiable patient information or clinical images.
Putting words to why Spee sometimes levels smoothly, and sometimes does not.
For orthodontic specialists, GP dentists using aligners, GP dentists using fixed appliances, and younger orthodontists in university departments.
Curve of Spee correction can sometimes happen naturally through leveling, just like the textbook suggests. But in other cases, treatment progresses and the curve remains deep. Anterior intrusion does not seem to work. You are unsure how to manage the premolars. The occlusion does not settle cleanly at finishing.
When that happens, treatment becomes heavy if you only have one strategy. U-arch, slot selection, and leveling with stiffer wires are classic, well-known methods. In this seminar, we organize those foundations, then go beyond them: powerful clinical options for when Spee correction gets stuck, and aligner-side thinking for the same problem.
What You Take Home
Clinical viewpoints you can bring back to diagnosis, treatment planning, and sequencing.
Another route when Spee correction gets stuck
Beyond anterior intrusion, we will add options such as premolar extrusion, TAD-supported control, and alternatives for cases where classic methods alone do not solve the problem.
A sequence that makes treatment lighter
We will organize classic methods such as U-arch, changing from .018 to .022 slot, and leveling with stiffer wires, then connect the next clinical decisions to the overall sequence.
Tips across labial, lingual, and aligners
We will share techniques that genuinely work in multi-bracket treatment, and also discuss aligner-side tips for Spee correction.
Speakers
Dr. Takada brings the Haisai Curve and premolar extrusion perspective. Dr. Komatsu brings Kashiwa Reverse and efficient mechanics from early leveling. Dr. Minamidate connects the fixed-appliance discussion with aligner-side thinking.
Director, Yui Orthodontic Clinic
Shunsuke Takada
The “Haisai Curve”: an eye-opening method for Spee correction.
Dr. Takada graduated from Fukuoka Dental College and earned his PhD through its graduate school. He served in the Department of Orthodontics at Fukuoka Dental College as assistant professor, department office chief, and lecturer, and is certified by the Japanese Orthodontic Society. Since opening Yui Orthodontic Clinic in Urasoe, Okinawa in 2024, he has continued specialist orthodontic care; in this seminar he will share the Haisai Curve, integrating anterior intrusion and premolar extrusion into the treatment sequence.
Director, Kashiwanoha Campus Orthodontic Clinic
Shohei Komatsu
Kashiwa Reverse. Efficient mechanics that start from the leveling stage.
Dr. Komatsu graduated from Nihon University School of Dentistry at Matsudo, trained and worked in oral surgery at University of the Ryukyus Hospital and Chubu Tokushukai Hospital, then completed the orthodontics program at Nihon University Graduate School of Dentistry at Matsudo. After working in the orthodontic department of Nihon University Matsudo Dental Hospital, he became certified by the Japanese Orthodontic Society and has served as a part-time lecturer at Nihon University since 2024. He will organize labial fixed-appliance Spee correction and present the Kashiwa Reverse.
Director, Fukuoka MA Orthodontic Clinic / Moderator
Takao Minamidate
Founder of X University. Key points for Spee correction with aligners.
Dr. Minamidate studied human sciences at the University of Tsukuba, completed a master’s degree at Musashino Art University, and graduated from Fukuoka Dental College before training in orthodontics at Kyushu University Hospital. He earned his PhD in dental orthodontics at Kyushu University and is certified by the European Aligner Society. As director of Fukuoka MA Orthodontic Clinic and founder of X University, he will moderate the discussion and connect fixed-appliance mechanics with aligner-based Spee correction.
Program
A lecture-based structure followed by discussion and Q&A to sharpen clinical decision-making. The order and timing may be adjusted depending on the live discussion.
OPENING
Opening and framing
We align the clinical problems and the map for the evening.
SESSION 01
Overview and early leveling mechanics
Why Spee correction becomes difficult, and where treatment tends to become heavy.
SESSION 02
Anterior intrusion, premolar control, and TADs
How to avoid forcing the whole problem through anterior intrusion alone.
SESSION 03
Classic methods and the options beyond them
U-arch, slot, and wire-size decisions as a foundation for other clinical routes.
DISCUSSION
Aligner perspective, discussion, and Q&A
We will go deeper into clinical decision-making across labial, lingual, and aligner treatment.
LECTURE 01
Overview of Spee correction in multi-bracket orthodontics
Why is it difficult? Where does treatment tend to stall? We will organize the problems of leveling and occlusal design.
LECTURE 02
How to integrate anterior intrusion and premolar control into treatment
We will cover mandibular anterior intrusion with TADs, how to support the premolar region so it does not intrude, and how to use premolar extrusion clinically.
LECTURE 03
Classic methods, then the options beyond them
U-arch, changing from .018 to .022 slot, and leveling with stiffer wires are classic, well-known methods. This lecture starts from those foundations, then shares other powerful approaches and the clinical reasoning behind them.
APPLIANCE FREE
Tips that translate across labial, lingual, and aligner treatment
We will share techniques that genuinely work in clinical multi-bracket treatment. Takao Minamidate will also cover key points and tips for Spee correction with aligners.
DISCUSSION
Cases, decisions, and clinical tips in deeper discussion
The goal is to translate useful techniques passed down in clinical practice into clear, usable clinical language. Q&A included.
Who This Is For
If you have ever struggled with Spee correction, whether in wires or aligners, this archive should land clinically.
- Orthodontic specialists who want to organize fixed-appliance technique one level deeper.
- GP dentists who use aligners and struggle with deep bite or Spee correction.
- GP dentists who also provide wire/fixed appliance treatment and want more efficient leveling.
- Younger orthodontists in university departments who want clinical techniques beyond the textbook.
Language
Japanese live, English archive
The live seminar is Japanese-only. The English version is provided as a translated archive.
Japanese live session
The live session will be delivered in Japanese only. There will be no simultaneous English interpretation during the live event.
English archive edition
The English archive is produced for purchasers. There is no minimum-attendee threshold. The English AI-subtitled archive is now available, followed by a reviewed English translation by an orthodontic translation specialist around July 28-August 11, 2026 JST. Each archive release will remain accessible for 1 month from its release date.
English Archive Edition
Single price. Secure payment is handled by Stripe.
Price
US$50
This is for the English-translated archive, not a live English interpretation ticket. Archive access details will be sent to the email address used at checkout. Refunds are generally not provided.
Watch the English AI-subtitled archive
Enter the email address used at Stripe checkout. The video is the original Japanese lecture with English AI subtitles.
English subtitles are shown in the black caption bar. Use the yellow button to show or hide them.
FAQ
Please read this before registering from outside Japan.
Can I watch if I cannot attend live?
Yes. For the Japanese ticket, live participation and archive access are bundled. For the English ticket, you are purchasing the translated archive edition. Archive access is planned for 1 month from each release date.
Will the live session be in English?
No. The live session is Japanese-only, and there will be no simultaneous English interpretation.
Is there a minimum number of English-speaking participants?
No. There is no minimum-attendee threshold. The English archive will be produced for purchasers.
When will the English archive be available?
The English AI-subtitled archive is now available. A reviewed English translation by an orthodontic translation specialist is planned around July 28-August 11, 2026 JST.
Can I ask questions?
You can send questions by email. The live Q&A itself will be conducted in Japanese.
Do I need LINE to receive the archive?
No. Archive access is managed by the email address used at Stripe checkout. The official LINE is optional and is mainly for reminders and future X University updates.
Can I receive a receipt?
Yes. For paid registrations, use the receipt button in your purchase-confirmation email. If you cannot find the email, enter your checkout email on the receipt delivery page; the link is sent only to that address. No payment receipt is issued for a zero-cost invitation. Reply to the purchase email only if you need a specific billing name.
Are refunds available?
Refunds are generally not provided. If there is an obvious payment issue such as duplicate checkout, please contact us by email.
Can I review the content later?
Yes. The translated archive is planned to remain accessible for 1 month from each release date.
Can I share the archive link?
No. Archive access is for the purchaser only and is tied to the email address used at checkout.
Entry / Contact
Register for the English archive
This English ticket is for the translated archive edition. Payment is handled by Stripe. Your checkout email will be used for archive access and follow-up announcements.
LINE registration alone is not an event registration or archive access credential. Important archive messages will be sent by email.