Online ISSN: 2515-8260

Keywords : Bracket position accuracy


Is bracket position determination from digital techniques accurate 100%?: A comparative ex-vitro study

Zhwan Jamal Rashid; Omar Fawzi Chawshli

European Journal of Molecular & Clinical Medicine, 2020, Volume 7, Issue 1, Pages 4384-4394

: Objective: This in vitro study aimed to assess the accuracy of orthodontic treatment outcome by comparing bracket positioning between digital and gold standard techniques. Methods: The sample consisted of ten Angle’s class I typodont models. Typodont models were divided into two groups according to the method of bracket positioning. Every five typodont models were assigned to one group. After orthodontic treatment simulation on the typodont models, Objective Grading System (OGS) for dental casts and radiographs was used in the assessment of all models to compare the final results. A calibration kit of the American Board of Orthodontics (ABO) was used for this purpose. The research was conducted in artificial teeth in pre-formed dental wax. The research was conducted in the college of Dentistry/ Sulaimani University in collaboration with the private SuliOrthodontics clinic. The Bland-Altman analysis was used to assess the intra-operator’s reliability of the vertical bracket positions. Horizontal and axial bracket position errors were assessed by using a color bar chart generated by the 3-Matic software after part comparison analysis of the stereolithographic (STL) file of bracketed models. The Wilcoxon signed-rank test was used to compare the median of the OGD in two time periods. Non-parametric Mann Whitney test was used to compare the mean rank between study groups. Results:A significant difference in the bracket position’s accuracy was seen between the orthodontic treatment outcomes measured by the ABO-OGS. The mean scores of the OGS criteria for gold standard and digital techniques were 15.80 ± 0.84 and 17.00 ± 0.71 (p = 0.049), respectively. Conclusion: Gold standard technique proved to have a more accurate result compared to digital technology.