Effect of Mechanical Vibration on Root Resorption
Vibration; Exposure
About this trial
This is an interventional diagnostic trial for Vibration; Exposure
Eligibility Criteria
Inclusion Criteria:
- Need for bilateral maxillary first premolar extractions (necessitating moderate anchorage) and fixed appliance treatment
- Permanent dentition
- Completion of apexification
- Similar minimal crowding on each side of the maxillary arch
Exclusion Criteria:
- Previous orthodontic or orthopedic treatment
- Unilateral or bilateral posterior crossbites
- Craniofacial anomaly
- History of trauma, bruxism, or parafunction
- Past or present signs and symptoms of periodontal disease
- Significant medical history that would affect the development or structure of the teeth and jaws and any subsequent tooth movement
- History of asthma
Sites / Locations
Arms of the Study
Arm 1
Arm 2
No Intervention
Active Comparator
No-force group
Force Group
The right and left side first premolar teeth were randomly assigned (split-mouth design) so that mechanical vibration was applied in the buccal direction on one side and the other side was used as the premolar tooth control group. Oral B HummingBird device (Procter&Gamble, USA) with a modified tip was used for the application of vibration. The tip was positioned mid-buccally of teeth to perform buccally directed vibration. HummingBird is prescribed maximum period 0.00885s corresponding to 6800RPM or 113Hz of the motor. The vibration procedure was applied for 10mins/day during the period of 12 weeks. At the end of the 12th week, the first stage was completed and the first premolar teeth were extracted.
The right and left side first premolar teeth were randomly assigned (split-mouth design) so that mechanical vibration was applied in the buccal direction to one side and the other side was used as the premolar tooth control group. As in no-force group, same device procedure was used for the application of vibration. Self-ligating Speed (Strite Industries, Cambridge, Ontario, Canada) tubes and brackets with 0.022×0.026 inch slots were bonded to the buccal surfaces of the right and left first molar teeth and first premolar teeth.150g of buccally directed forces, producing by a 0.017×0.025-in beta-titanium-molybdenum alloy (3M Unitek, Monrovia, Calif) cantilever spring, were applied to premolar teeth on both side.The force magnitude was measured with a strain gauge (Dentaurum). At the end of the 12th week, the first stage was completed and the first premolar teeth were extracted.