Influence of the Bracket Material on the Post-Cure Degree of Conversion of Resin-Based Orthodontic Adhesive Systems

Influence of the Bracket Material on the Post-Cure Degree of Conversion of Resin-Based Orthodontic Adhesive Systems

The aim of this study was to examine the influence of the orthodontic bracket material on the short-term and long-term post-cure development of the degree of conversion (DC) of resin-based orthodontic adhesive systems. Five commercially available materials characterized by different compositions and...

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Bibliographic Details
Published in:Polymers Vol. 16; no. 3; p. 318
Main Authors: Profeta Krznar, Ivona, Par, Matej, Tarle, Zrinka, Meštrović, Senka
Format: Journal Article
Language:English
Published: Switzerland MDPI AG 01-01-2024
Subjects:
Adhesives
Bond strength
Brackets
Composite materials
Curing
degree of conversion
Epoxy resins
Fourier transform infrared spectroscopy
Fourier transforms
FTIR
Identification and classification
Light
orthodontic adhesive systems
Orthodontic appliances
orthodontic brackets
Orthodontics
Polyethylene terephthalate
Polymerization
Properties
Resins
Spectrum analysis
Croatia
United States > US
orthodontic adhesive systems
orthodontic brackets
FTIR
degree of conversion
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Summary:The aim of this study was to examine the influence of the orthodontic bracket material on the short-term and long-term post-cure development of the degree of conversion (DC) of resin-based orthodontic adhesive systems. Five commercially available materials characterized by different compositions and curing modes (light-curable or dual-curable) were tested under three different light curing conditions: without brackets (control group, CO), and in the presence of metal brackets (MB group) or ceramic brackets (CB group). Fourier-transform infrared spectroscopy was used to determine the post-cure DC development, both after "short-term" periods (2, 6, and 10 min) and "long-term" periods (1, 7, and 28 days). The short-term DC values ranged from 43.9% to 76.1%, and the long-term DC values were higher and ranged from 54.3% to 85.3%. The MB group demonstrated significantly lower short-term DC values compared to the CO and the CB groups, while the CB group had statistically similar or slightly lower DC values compared to the CO group. Long-term DC values in the MB and the CB groups were statistically lower or similar compared to the CO group, which depended on the post-cure time. The results indicated that the post-cure DC development was highly material-dependent and affected by the presence of different types of bracket material.
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ISSN:2073-4360
2073-4360
DOI:10.3390/polym16030318