Abstract

Introducing TADs with Interchangeable Upper Units to Enhance Alexander Discipline

by Itsuki Yasuhiro

I developed temporary anchorage devices (TADs) called i-stationαwith a removable superstructure which have increased the range of tooth movement. In fact, i-stationα is able to perform distalization, mesialization, expansion, constriction, intrusion and extrusion. The device allows the force to be distributed to every possible direction, which is secured by only 2 to 4 screws. Furthermore, the screws are three-threaded and they have more than 1.5 times stronger gripping force than typical one-thread screws. In addition, people whose bones were too thin to insert screws can be treated perfectly as a result of the support provided by 4 screws. i-stationα does not require complicated adjustments, has a strong fixation source, and can place the power point at the optimum position for tooth movement. This has made it possible to treat even more complex and difficult cases more easily without having surgeries. This time, it is my great honor to introduce a newly developed i-stationα and examine its possibilities. Also, I believe that i-stationα will be able to contribute to the further enhancement of the Alexander Discipline.

Learning Objectives

After this lecture, you will be able to understand the structure and features of i-station α
After this lecture, you will be able to gain knowlege of mechanics of i-station α
After this lecture, you will be able to learn how to treat difficult cases using i-station α