In each patient one side was randomly selected to be the experimental side, and the contralateral side served as control. Maxillary and mandibular impressions were taken on a monthly basis and the casts made were used for tooth movement measurements. The results of the study indicated that ultrasound application to periodontal tissues is safe. No significant difference in tooth movement was found between those quadrants that had ultrasound applied and those that did not. Perhaps, the parameters of ultrasound used were not clinically relevant, although they were within the range of previous studies .
Future studies utilizing varied applications of ultrasound are in order.
Then it may be possible to know if ultrasound will aid the orthodontists in decreasing treatment time. Temple University School of Dentistry. All rights reserved.