2009 AAO Meeting (Boston) Phase I & Phase II Treatment

Three randomized clinical trials were conducted at the University of North Carolina (Dr. Tulloch), the University of Florida (Dr. Wheeler), and the United Kingdom (Dr. O'Brien) to assess the clinical effectiveness of Phase I & Phase II therapy versus Phase II treatment by itself. Although these studies have evaluated many facets of orthodontic treatment outcomes, the overall conclusion of all three RCT's was that there is no clinically significant differences between Phase I therapy when combines with Phase II therapy versus Phase II treatment by itself. The only statistically significant difference was related to the overall treatment time, and the Phase II treatment was approximately seventeen (17) months shorter than the combined therapy of a Phase I and Phase II approach.