Reliability of Expected Root Position in Two Different Bracket Bonding and Positioning Techniques (A Comparative Ex-Vitro Study)
Volume 7 , Issue 2 , December 2020 , Pages 105-113
Authors
Zhwan J. Rashid 1 ; Omer F. Chawshli 2
1 Pedodontic, Orthodontic, and Preventive Dentistry Department, College of Dentistry, University of Sulaimani, Sulaimani, Iraq.
2 Pedodontic, Orthodontic, and Preventive Dentistry Department, College of Dentistry, Hawler Medical University, Erbil, Iraq.
10.17656/sdj.10122
Keywords
Abstract
Objective: To measure the reproducibility of expecting root position (ERP) in various brackets bonding and positioning techniques.
Methods: Twenty Angle’s Class-I typodont models were divided into four groups of five models each. The first two groups were
bonded directly, and the other two groups were bonded indirectly. Intraoral scanning and CBCT were taken before and after simulation
orthodontic treatment for each model. The pre-treatment CBCT of models was matched to the digital crown of the post-treatment
intraoral scanner of the models in order to put the root in the expected position. At the same time, the true root position was obtained
from the CBCT of post-treated models. Finally, the true and ERPs were superimposed by part comparison analysis function in 3-Matic
software to measure mm displacement between two compared parts. The intra-examiner reliability was tested by the Bland-Altman
method. One-way ANOVA was used to compare the displacement means of true and ERP.
Results: There was no significant difference between the mean of true and ERP among the study groups for maxillary and mandibular
arches (P>0.05).
Conclusions: Combining data from CBCT and the digital models, simulation of the root positions was statistically validated with
direct and indirect techniques of bracket positioning and bonding.
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