The effects of a vibrational appliance on tooth movement and patient discomfort: a prospective randomised clinical trial.
ABSTRACT The aim of this study was to assess the rate of tooth movement and discomfort experienced by orthodontic patients using a vibrational appliance (Tooth Masseuse).
In this randomised controlled trial (RCT), 66 consecutive patients were assigned to a control or experimental group. The experimental group was instructed to use a vibrational appliance for a minimum of 20 minutes per day. All of the patients had the same fixed appliance and a 0.014 inch thermal NiTi wire during the 10 week study period. Impressions of the mandibular six anterior teeth were taken at 4 time points: at the start of treatment, 5 weeks, 8 weeks, and at 10 weeks after commencement. Little's Irregularity Index was used to record alignment and assess the rate of tooth movement. A discomfort score chart was used to evaluate patient pain levels at 5 time points.
The experimental group showed a 65% reduction in irregularity at 10 weeks, while the control group showed a 69% reduction in irregularity over the same period. No significant differences in irregularity or pain levels were observed at any of the time points between the groups.
The results demonstrate that, for 20 minute use per day, there appears to be no clinical advantage in using the vibrational appliance for the early resolution of crowding or the alleviation of pain during initial alignment.
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ABSTRACT: Objective: To investigate the effect of externally applied cyclical (vibratory) forces on the rate of tooth movement, the structural integrity of the periodontal ligament, and alveolar bone remodeling. Methods: Twenty-six female Sprague-Dawley rats (7 weeks old) were divided into four groups: CTRL (unloaded), VBO (molars receiving a vibratory stimulus only), TMO (molars receiving an orthodontic spring only), and TMO+VB (molars receiving an orthodontic spring and the additional vibratory stimulus). In TMO and TMO+VB groups, the rat first molars were moved mesially for 2 weeks using Nickel-Titanium coil spring delivering 25 g of force. In VBO and TMO+VB groups, cyclical forces at 0.4 N and 30 Hz were applied occlusally twice a week for 10 minutes. Microfocus X-ray computed tomography analysis and tooth movement measurements were performed on the dissected rat maxillae. Tartrate-resistant acid phosphatase staining and collagen fiber assessment were performed on histological sections. Results: Cyclical forces significantly inhibited the amount of tooth movement. Histological analysis showed marked disorganization of the collagen fibril structure of the periodontal ligament during tooth movement. Tooth movement caused a significant increase in osteoclast parameters on the compression side of alveolar bone and a significant decrease in bone volume fraction in the molar region compared to controls. Conclusions: Tooth movement was significantly inhibited by application of cyclical forces.The Angle Orthodontist 08/2013; DOI:10.2319/032213-234.1 · 1.28 Impact Factor
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ABSTRACT: Objectives The purposes of this study were to evaluate the effects of frequent applications of low level laser therapy (LLLT) on corticotomy-assisted tooth movement in a beagle model and to compare the effects in the mandible and maxilla. Materials and methods In four male beagles, the maxillary and mandibular 2nd premolars were extracted. The 3rd premolars were corticotomized and then protracted from the canines with a continuous force of 200g. Daily LLLT (AlGaInP diode) was applied at the buccal mucosa of the corticotomized premolars on one side only. Tooth movement was measured for 8 weeks. Fluorochromes were injected intravenously at the start of the experiment (T0), after 2 weeks (T2), after 4 weeks (T4), and after 8 weeks (T8) to evaluate new bone formation on the tension sides. Histomorphometric and immunohistologic evaluation were performed. Results In the mandible, the movement of the corticotomized premolars in the LLLT + corticotomy group was less than in the corticotomy group, although the difference was not statistically significant. In the maxilla, no significant differences between the groups were found. Osteoclastic and proliferating cell activities and the amount of new bone formation were higher in the mandibular LLLT + corticotomy group than in the corticotomy group. Conclusion The frequent application of LLLT showed no significant effect on the corticotomized tooth movement.Journal of oral and maxillofacial surgery: official journal of the American Association of Oral and Maxillofacial Surgeons 06/2014; DOI:10.1016/j.joms.2014.02.028 · 1.28 Impact Factor