Post-curing conversion kinetics as functions of the irradiation time and increment thickness
Objective: This study evaluated the variation of conversion degree (DC) in the 12 hours following initial photoactivation of a low-shrinkage composite resin (Venus Diamond). Material and Methods: The conversion degree was monitored for 12 hours using Attenuated Total Reflection (ATR) F-TIR Spectro...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
University of São Paulo
2013-04-01
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| Series: | Journal of Applied Oral Science |
| Subjects: | |
| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1678-77572013000200190 |
| _version_ | 1819267962921549824 |
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| author | Nicola Scotti Alberto Venturello Francesco Andrea Coero Borga Damiano Pasqualini Davide Salvatore Paolino Francesco Geobaldo Elio Berutti |
| author_facet | Nicola Scotti Alberto Venturello Francesco Andrea Coero Borga Damiano Pasqualini Davide Salvatore Paolino Francesco Geobaldo Elio Berutti |
| author_sort | Nicola Scotti |
| collection | DOAJ |
| description | Objective: This study evaluated the variation of conversion degree (DC) in the 12 hours following initial photoactivation of a low-shrinkage composite resin (Venus Diamond). Material and Methods: The conversion degree was monitored for 12 hours using Attenuated Total Reflection (ATR) F-TIR Spectroscopy. The composite was placed in 1 or 2 mm rings and cured for 10 or 20 seconds with a LED lamp. ATR spectra were acquired from the bottom surface of each sample immediately after the initial photoactivation (P=0), 30 minutes (P=0.5) and 12 hours after photoactivation (P=12) in order to obtain the DC progression during the post-curing period. Interactions between thickness (T), irradiation time (I) and post-curing (P) on the DC were calculated through ANOVA testing. Results: All the first order interactions were statistically significant, with the exception of the T-P interaction. Furthermore, the shift from P=0 to P=0.5 had a statistically higher influence than the shift from P=0.5 to P=12. The post-curing period played a fundamental role in reaching higher DC values with the low-shrinkage composite resin tested in this study. Moreover, both the irradiation time and the composite thickness strongly influenced the DC. Conclusions: Increased irradiation time may be useful in obtaining a high conversion degree (DC) with a low-shrinkage nano-hybrid composite resin, particularly with 2 mm composite layers. |
| first_indexed | 2024-12-23T21:25:30Z |
| format | Article |
| id | doaj.art-32fcc0a8d43d44d98505a92e6e5bc36d |
| institution | Directory Open Access Journal |
| issn | 1678-7757 1678-7765 |
| language | English |
| last_indexed | 2024-12-23T21:25:30Z |
| publishDate | 2013-04-01 |
| publisher | University of São Paulo |
| record_format | Article |
| series | Journal of Applied Oral Science |
| spelling | doaj.art-32fcc0a8d43d44d98505a92e6e5bc36d2022-12-21T17:30:37ZengUniversity of São PauloJournal of Applied Oral Science1678-77571678-77652013-04-01212190195Post-curing conversion kinetics as functions of the irradiation time and increment thicknessNicola ScottiAlberto VenturelloFrancesco Andrea Coero BorgaDamiano PasqualiniDavide Salvatore PaolinoFrancesco GeobaldoElio BeruttiObjective: This study evaluated the variation of conversion degree (DC) in the 12 hours following initial photoactivation of a low-shrinkage composite resin (Venus Diamond). Material and Methods: The conversion degree was monitored for 12 hours using Attenuated Total Reflection (ATR) F-TIR Spectroscopy. The composite was placed in 1 or 2 mm rings and cured for 10 or 20 seconds with a LED lamp. ATR spectra were acquired from the bottom surface of each sample immediately after the initial photoactivation (P=0), 30 minutes (P=0.5) and 12 hours after photoactivation (P=12) in order to obtain the DC progression during the post-curing period. Interactions between thickness (T), irradiation time (I) and post-curing (P) on the DC were calculated through ANOVA testing. Results: All the first order interactions were statistically significant, with the exception of the T-P interaction. Furthermore, the shift from P=0 to P=0.5 had a statistically higher influence than the shift from P=0.5 to P=12. The post-curing period played a fundamental role in reaching higher DC values with the low-shrinkage composite resin tested in this study. Moreover, both the irradiation time and the composite thickness strongly influenced the DC. Conclusions: Increased irradiation time may be useful in obtaining a high conversion degree (DC) with a low-shrinkage nano-hybrid composite resin, particularly with 2 mm composite layers.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1678-77572013000200190Post-curingThicknessIrradiation timeLEDLow-shrinkage composite |
| spellingShingle | Nicola Scotti Alberto Venturello Francesco Andrea Coero Borga Damiano Pasqualini Davide Salvatore Paolino Francesco Geobaldo Elio Berutti Post-curing conversion kinetics as functions of the irradiation time and increment thickness Journal of Applied Oral Science Post-curing Thickness Irradiation time LED Low-shrinkage composite |
| title | Post-curing conversion kinetics as functions of the irradiation time and increment thickness |
| title_full | Post-curing conversion kinetics as functions of the irradiation time and increment thickness |
| title_fullStr | Post-curing conversion kinetics as functions of the irradiation time and increment thickness |
| title_full_unstemmed | Post-curing conversion kinetics as functions of the irradiation time and increment thickness |
| title_short | Post-curing conversion kinetics as functions of the irradiation time and increment thickness |
| title_sort | post curing conversion kinetics as functions of the irradiation time and increment thickness |
| topic | Post-curing Thickness Irradiation time LED Low-shrinkage composite |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1678-77572013000200190 |
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