Page 116 - 7. FINAL draft Compendium 2019 2020_22072022

IN-VITRO MEASUREMENT ON THE ACCURACY OF ORTHODONTIC BRACKET SLOT SIZE
USING SCANNING ELECTRON MICROSCOPY (SEM)
NMRR-18-1465-41490

Sindhuja R, Lawrence T
Objective: To evaluate the accuracy of orthodontic bracket slot height from different
countries of manufacture and to compare this to the nominal value of 0.022 inches.
Materials and Methods: This was a cross sectional study which involved measurements of
five upper right central incisor brackets of 0.022 inch slot height from four different
countries of manufacture using scanning electron microscope (SEM). The measurements
were conducted in triplicate and the means and standard deviations of the slot height were
determined and compared to the nominal value of 0.022 inches. Statistical analyses were
carried out using Graphpad Prism software. One-way ANOVA, Tukey’s multiple
comparisons, Dunett’s multiple comparison and Independent T-tests were carried out.
P<0.05 was considered statistically significant. Results: B1 (China) was significantly
different (P<0.05) from the nominal value of 0.022 inches. B2 (Germany) was not
significantly different (P>0.05) from 0.022 inches. B3 (Japan) was significantly different
(P<0.05) from 0.022 inches. B4 (America) and B5 (China; Lazada) was not significantly
different (P>0.05) from the value of 0.022 inches. Conclusion: Brackets B2, B4 and B5 were
shown to have accurate slot height measurements, however brackets B1 and B3 were
oversized but fell within the range that has been previously reported. The findings of this
study warrant further investigation using a larger sample, which could prove beneficial to
orthodontic practitioners when treating patients.

Published in Malaysian Dental Journal DOI: https://mda.org.my/home/wp-content/uploads/2020/12/mdj-2020-02-08-In-
vitro-Measurement-of-the-Accuracy-of-Orthodontic-Bracket-Slot-Size-using-Scanning-Electron-Microscopy-SEM.pdf
EpubDecember (2)2020

Dr Sindhuja Rajadorai
Orthodontic Specialist Unit
Pekan Dental Clinic
Pahang

Dr Christopher Lawrence Tan Soon Lee
Orthodontic Specialist Unit
Jalan Gambut Dental Clinic
Pahang

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