The effect of canine disimpaction performed with temporary anchorage devices (TADs) before comprehensive orthodontic treatment to avoid root resorption of adjacent teeth.
OBJECTIVE
The aim of this study was to evaluate the movement of impacted canines away from the roots of neighboring teeth before full-mouth bracket placement, performed by means of TADs to decrease undesired side effects on adjacent teeth.


METHODS
The study sample consisted of 34 palatally impacted canines, being 19 in the experimental group and 15 in the control group. In the experimental group, before placement of brackets, the impacted canine was erupted by means of miniscrews. In the control group, after initiation of comprehensive orthodontics, canine disimpaction was performed by means of a cantilever spring soldered to a palatal bar. At the end of treatment, volume of lateral incisors and canine root resorption were measured and compared by means of a CBCT-derived tridimensional model. Visual Analogue Scale (VAS) score, bleeding on probing (BOP) and gingival index (GI) were recorded. Clinical success rate was also calculated.


RESULTS
The volume of root resorption of lateral teeth in the control group was significantly greater than in the experimental group (p < 0.001). At the end of treatment, VAS score, GI and BOP were not significantly different between the two groups.


CONCLUSIONS
Based on our results, it seems that disimpaction of canines and moving them to the arch can be done successfully carried out with minimal side effects by means of skeletal anchorage.
Professor, Mashhad University of Medical Sciences, Dental Research Center, Department of Orthodontics, School of Dentistry, Mashhad, Iran., Mashhad University of Medical Sciences, Mashhad University of Medical Sciences, Dental Research Center, School of Dentistry, Mashhad , Iran.
Farzin
F
Heravi
Assistant professor, Mashhad University of Medical Sciences, Oral and Maxillofacial Diseases Research Center, Department of Orthodontics, School of Dentistry, Mashhad, Iran. , Mashhad University of Medical Sciences, Mashhad University of Medical Sciences, Oral and Maxillofacial Diseases Research Center, School of Dentistry, Mashhad , Iran.
Hooman
H
Shafaee
Assistant professor, Mashhad University of Medical Sciences, Dental Research Center, Department of Periodontics, School of Dentistry, Mashhad, Iran., Mashhad University of Medical Sciences, Mashhad University of Medical Sciences, Dental Research Center, School of Dentistry, Mashhad , Iran.
Ali
A
Forouzanfar
Associate professor, Mashhad University of Medical Sciences, Dental Materials Research Center, Department of Oral and Maxillofacial Radiology, School of Dentistry, Mashhad, Iran., Mashhad University of Medical Sciences, Mashhad University of Medical Sciences, Dental Materials Research Center, School of Dentistry, Mashhad , Iran.
Seyed Hossein Hoseini
SH
Zarch
Assistant professor, Shahed University of Medical Sciences, Tehran, Iran., Shahed University of Medical Sciences, Shahed University of Medical Sciences, Tehran , Iran.
Mohsen
M
Merati
D003481:Cuspid; D006801:Humans; D052280:Orthodontic Anchorage Procedures / Q000379:methods*; D009971:Orthodontics, Corrective / Q000379:methods*; D012391:Root Resorption / Q000517:prevention & control*; D014095:Tooth, Impacted / Q000628:therapy*