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

Scientific paper - Original scientific paper

• Author: Ivona Profeta Krznar
• Author: Matej Par
• Author: Zrinka Tarle
• Author: Senka Meštrović
• Author's institution: (Zagreb University Hispital Center)
• Author's institution: University of Zagreb; School of Dental Medicine
• Scientific / art field, discipline and subdiscipline: BIOMEDICINE AND HEALTHCARE; Dental Medicine

Abstract (english)

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.

• Keywords (english): degree of conversion; FTIR; orthodontic adhesive systems; orthodontic brackets
• Language: english
• Publication type: Scientific paper - Original scientific paper
• Publication status: Published
• Peer review: Peer review - international
• Publication version: Published version
• Journal title: Polymers
• Numbering: vol. 16, no. 3, 318
• e-ISSN: 2073-4360
• DOI: https://doi.org/10.3390/polym16030318
• URN:NBN: urn:nbn:hr:127:836795
• Publication: 2024-01-24
• Document URL: https://www.mdpi.com/2073-4360/16/3/318
• Type of resource: Text
• Access conditions: Open access
• Created on: 2024-07-01 10:27:29