Thesis (Ph.D.) - Cairo University - Faculty of Oral and Dental Medicine - Department of Orthodontics

The current study was a Randomized Controlled clinical Trial that was performed to investigate three dimensionally; using digital models and Cone Beam Computed Tomography imaging, the effect of vibrational devise (AcceleDent) on the rate of tooth movement in a canine retraction model. The sample consisted of 32 patients requiring bilateral upper first premolars extraction and canine retraction with maximum anchorage. The sample was recruited from the outpatient clinic of the Orthodontic Department, Faculty of Dentistry, Cairo University. They were randomly allocated to experimental group using AcceleDent aura appliance 20 mins daily and the other group was control group. After placement of the fixed orthodontic appliance, levelling and alignment proceeded till 0.016" {u00D7} 0.022" st.st upper archwire. Indirect skeletal anchorage was then prepared using TADs inserted bilaterally between the upper 1st molar and 2nd premolar, and the patient was referred for upper 1st premolars extraction. After that 0.017 x 0.025 inch st.st. wire was inserted and canine retraction was performed using NiTi coil springs delivering 150 g of force/side. The experimental group received AcceleDent aura device in the same day of starting canine retraction with instruction of how to use it. Data were collected from monthly upper impressions, which were poured into stone models and scanned to obtain sequential digital models, in addition to pre- and post-retraction maxillary CBCT images. From the results of the clinical and statistical analyses, and within the limitations of this study, the following conclusions could be withdrawn: 1. Orthodontic tooth movement couldn{u2019}t be accelerated by AcceleDent aura (vibrational forces). 2. Pain level couldn{u2019}t be reduced by Vibrational force with an AcceleDent device during orthodontic treatment. 3. Root condition was not affect by vibrational forces. 4. Indirect anchorage using mini-screws did not offer absolute anchorage. 5. Digital models were powerful tools in assessment of orthodontic tooth movement.

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