Post-Retention Changes in Class II Correction With the Forsus (trademark) Appliance
Uniformed Services University of the Health Sciences Bethesda United States
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The goal of this retrospective, descriptive study was to evaluate post-treatment changes of non-extraction treatment of class II correction using the Forsus trademark appliance. Methods 40 Class II patients 25 males, 15 females consecutively treated with the Forsus trademark appliance had cephalometric radiographs taken before treatment, at the end of comprehensive fixed and Forsus trademark treatment, and 1-4.5 years out of retention. Each radiograph was digitally traced by one examiner and intrarater reliability was measured. 29 cephalometric variables angular and linear were analyzed. At debond to post-retention, SNA and SNB increased 0.9plus-minus1.9 degrees and 1.0plus-minus1.3 degrees respectively, IMPA increased 1.6plus-minus4.0 degrees while overjet and overbite decreased 0.8plus-minus0.7mm and 0.9plus-minus1.0mm respectively. Conclusion The null hypothesis was rejected. The increases seen in SNA and SNB during the post-retention period were most likely due to continued normal growth.
- Medicine and Medical Research