TY - JOUR
T1 - Corrosion of orthodontic brackets
T2 - qualitative and quantitative surface analysis
AU - Doomen, Romy A.
AU - Nedeljkovic, Ivana
AU - Kuitert, Reinder B.
AU - Kleverlaan, Cornelis J.
AU - Aydin, Burcu
N1 - Publisher Copyright:
© 2022 by The EH Angle Education and Research Foundation, Inc.
PY - 2022/9
Y1 - 2022/9
N2 - Objectives: To determine and compare surface characteristics and presence of corrosion in new and used brackets with optical light microscopy (OLM) and scanning electron microscopy (SEM), and with elemental chemical analysis with energy-dispersive X-ray spectroscopy (EDS). Materials and Methods: OLM and SEM were used to analyze 24 new and 24 used conventional premolar brackets. EDS analysis was performed in six used brackets and four new brackets with corrosion-suspected spots. Results: OLM and SEM images showed wear/abfraction signs, striations, pits/crevices, and adherent material. Used brackets showed more deterioration than new brackets. SEM images disclosed more morphological features than OLM images. EDS analysis revealed a significantly higher phosphorus (P = .001) and sodium (P < .005) weight fraction and significantly lower amounts of chromium (P < .001) in used brackets. The iron, chromium, and nickel weight fractions did not differ significantly between the clean and corrosion-suspected spots. Of the corrosionsuspected spots analyzed by combined SEM and EDS, 44.14% and 6.90% remained corrosionsuspected on used and new brackets, respectively. Conclusions: Used brackets showed more signs of corrosion than new ones. Combined assessment of SEM and EDS indicates that the bracket surface is affected during orthodontic treatment as a result of corrosion.
AB - Objectives: To determine and compare surface characteristics and presence of corrosion in new and used brackets with optical light microscopy (OLM) and scanning electron microscopy (SEM), and with elemental chemical analysis with energy-dispersive X-ray spectroscopy (EDS). Materials and Methods: OLM and SEM were used to analyze 24 new and 24 used conventional premolar brackets. EDS analysis was performed in six used brackets and four new brackets with corrosion-suspected spots. Results: OLM and SEM images showed wear/abfraction signs, striations, pits/crevices, and adherent material. Used brackets showed more deterioration than new brackets. SEM images disclosed more morphological features than OLM images. EDS analysis revealed a significantly higher phosphorus (P = .001) and sodium (P < .005) weight fraction and significantly lower amounts of chromium (P < .001) in used brackets. The iron, chromium, and nickel weight fractions did not differ significantly between the clean and corrosion-suspected spots. Of the corrosionsuspected spots analyzed by combined SEM and EDS, 44.14% and 6.90% remained corrosionsuspected on used and new brackets, respectively. Conclusions: Used brackets showed more signs of corrosion than new ones. Combined assessment of SEM and EDS indicates that the bracket surface is affected during orthodontic treatment as a result of corrosion.
KW - Brackets
KW - Corrosion
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U2 - 10.2319/072321-584.1
DO - 10.2319/072321-584.1
M3 - Article
AN - SCOPUS:85136268463
SN - 0003-3219
VL - 92
SP - 661
EP - 668
JO - Angle Orthodontist
JF - Angle Orthodontist
IS - 5
ER -