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There are a variety of treatment options to move molar teeth in a backward direction. While I am not familiar with the particular device you described as a ``T-Rex," it seems to have the same characteristics as other appliances used for this purpose. Any appliance that can apply appropriate force systems to move teeth should be effective including headgear.
It is difficult to give other options for treatment without knowing the exact nature of the problem -- i.e. skeletal or dental; protrusive maxilla or retrusive mandible ; both; etc. The appropriate treatment is dependent on an accurate diagnosis. There is no question that adult orthodontics is more difficult, but it has proven to be effective.
I would recommend that you seek a second opinion from a trained orthodontist if you have concerns about the current therapeutic approach to your treatment.
Richard Ceen, BS, DDS, FACD
Professor
Dept. of Orthodontics
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