Annual Scientific Congress of the Korean Association of Orthodontists
PASSION FOR A LONG JOURNEY :
Nature vs Nurture
November 5(Thu) - 6(Fri), 2020
Precongress: November 1(Sun) / VOD: November 7(Sat) - 8(Sun)
Korea-Japan Joint Symposium - Long Term Stability
The stability of open bite treated by anterior teeth extrusion, molar intrusion and surgery
Dr. Yasushi Nishii
Affiliation: Tokyo Dental College department of Orthodontics
Address: 2-9-18 Kanda Misaki-cho Chiyoda-ku, Tokyo Japan
Resident course in Tokyo Dental College Department of Orthodontics
Tokyo Dental College
Doctor of Dentistry in Tokyo Dental College
Degree of Dental Surgery in Tokyo Dental College
Professor and Chair in Tokyo Dental College Department of Orthodontics
Associate Professor in Tokyo Dental College Department of Orthodontics
Senior Assistant Professor in Tokyo Dental College Department of Orthodontics
Visiting Scholar in Dental School of University of Southern California
Assistant Professor in Tokyo Dental College Department of Orthodontics
Private dental office
Outstanding poster award of 26th Congress of the Japanese Society for Jaw Deformities
Outstanding poster award of The 55th Congress of the Korean Association of Maxillofacial Plastic and Reconstructive Surgeons
Treatment strategy has drastically changed in orthodontics after the appearance of TAD. Molar intrusion, one of the most difficult tooth movement, has become possible by TAD. The only treatment alternative to open bite was extrusion of anterior teeth before TAD; now, we have obtained treatment strategy of not only anterior teeth extrusion but also molar intrusion with TAD. Also, surgical orthodontics, as usual, is applied to severe open bite as another treatment method.
The diagnosis has become a more important issue in choosing treatment strategies such as anterior teeth extrusion, molar intrusion and surgery. The stability of retention in open bite should be affected by these treatment alterations. Molar intrusion, that is a relatively new treatment method, has not sufficiently demonstrated the retention stability.
We evaluated relation between facial morphology in vertical component and choice of treatment strategy, anterior teeth extrusion, molar intrusion, and surgery with the retrospect study, and also compared the relapse among three treatment strategies.
I would like to share our data information and my treatment opinion with KAO members. It would be great if my lecture could contribute to the daily clinical practice of KAO members even just a little.
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