The effect of 12 weeks of mechanical vibration on root resorption: a micro-CT study
Hakan Yılmaz, Fethiye Çakmak Özlü, Tamer Türk, M. Ali Darendeliler
Abstract
OBJECTIVE: The aim was to investigate the effect of mechanical vibration on root resorption with or without orthodontic force application. MATERIAL AND METHODS: Twenty patients who required maxillary premolar extractions as part of orthodontic treatment were randomly divided into two groups of 10: no-force group and force group. Using a split-mouth procedure, each patient's maxillary first premolar teeth were randomly assigned as either vibration or control side for both groups. A buccally directed vibration of 50 Hz, with an Oral-B HummingBird device, was applied to the maxillary first premolar for 10 min/day for 12 weeks. After the force application period, the maxillary first premolars were extracted and scanned with micro-computed tomography. Fiji (ImageJ), performing slice-by-slice quantitative volumetric measurements, was used for resorption crater calculation. Total crater volumes were compared with the Wilcoxon and Mann-Whitney U tests. RESULTS: on the control side, respectively. There was no statistical difference between the vibration and control sides (P > 0.05). There was more resorption by volume in the force group when compared to the no-force group (P < 0.05). CONCLUSION: Mechanical vibration did not have a beneficial effect on reducing root resorption; however, force application caused significant root resorption.