Remaining Unreacted Methacrylate Groups in Resin-Based Composite With Respect to Sample Preparation and Storing Conditions Using Micro-Raman Spectroscopy
Abstract
The aim of this study was to measure degree of conversion (DC) of resin-based composites (RBCs) using micro-Raman spectroscopy followed by different sample preparation procedures and storing conditions. Ninety samples of Tetric EvoCeram (Ivoclar Vivadent, Schaan, Liechtenstein) were prepared in standardized molds and cured with a high powered LED light-curing unit, bluephase (R)) (Ivoclar Vivadent, Schaan, Liechtenstein) for 20 s. Samples were allocated to eight groups. DC of groups I and 2 was recorded without or after polishing. DC in groups 3 and 4 was recorded from vertically sectioned samples versus "split" samples. DC in groups 5-8 was recorded after storing samples at room temperature and humidity, in 90 +/- 2% humidity at 37 +/- 1 degrees C, distilled water at 37 +/- 1 degrees C or buffered incubation medium (BIM) at 37 +/- 1 degrees C for 24 h. Mean values of DC in polished and unpolished samples were 63.6% (+/- 3.2%) and 54.7% (+/- 5.2%), respectively (p lt 0.0001). There w...as no significant difference in DC after sample-sectioning (p > 0.05). Significantly higher DC values were obtained after storing samples in BIM (76.8% +/- 2.1%) than in distilled water (59.7% +/- 5.7%), extreme humidity (60.3% +/- 3.9%) or in room conditions (63.6% +/- 3.2%) (P lt 0.001). DC of an RBC measured by micro-Raman spectroscopy may be affected by differences in sample preparation and storing conditions, making it difficult to extrapolate data from in vitro studies into clinically relevant information.
Keywords:
micro-Raman spectroscopy / degree of conversion / resin-based composites / adhesive restorations / dental materialsSource:
Journal of Biomedical Materials Research Part B: Applied Biomaterials, 2008, 87B, 2, 468-474Publisher:
- Wiley, Hoboken
DOI: 10.1002/jbm.b.31128
ISSN: 1552-4973
PubMed: 18506816
WoS: 000260355000021
Scopus: 2-s2.0-55049139944
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Stomatološki fakultetTY - JOUR AU - Miletić, Vesna AU - Santini, Ario PY - 2008 UR - https://smile.stomf.bg.ac.rs/handle/123456789/1450 AB - The aim of this study was to measure degree of conversion (DC) of resin-based composites (RBCs) using micro-Raman spectroscopy followed by different sample preparation procedures and storing conditions. Ninety samples of Tetric EvoCeram (Ivoclar Vivadent, Schaan, Liechtenstein) were prepared in standardized molds and cured with a high powered LED light-curing unit, bluephase (R)) (Ivoclar Vivadent, Schaan, Liechtenstein) for 20 s. Samples were allocated to eight groups. DC of groups I and 2 was recorded without or after polishing. DC in groups 3 and 4 was recorded from vertically sectioned samples versus "split" samples. DC in groups 5-8 was recorded after storing samples at room temperature and humidity, in 90 +/- 2% humidity at 37 +/- 1 degrees C, distilled water at 37 +/- 1 degrees C or buffered incubation medium (BIM) at 37 +/- 1 degrees C for 24 h. Mean values of DC in polished and unpolished samples were 63.6% (+/- 3.2%) and 54.7% (+/- 5.2%), respectively (p lt 0.0001). There was no significant difference in DC after sample-sectioning (p > 0.05). Significantly higher DC values were obtained after storing samples in BIM (76.8% +/- 2.1%) than in distilled water (59.7% +/- 5.7%), extreme humidity (60.3% +/- 3.9%) or in room conditions (63.6% +/- 3.2%) (P lt 0.001). DC of an RBC measured by micro-Raman spectroscopy may be affected by differences in sample preparation and storing conditions, making it difficult to extrapolate data from in vitro studies into clinically relevant information. PB - Wiley, Hoboken T2 - Journal of Biomedical Materials Research Part B: Applied Biomaterials T1 - Remaining Unreacted Methacrylate Groups in Resin-Based Composite With Respect to Sample Preparation and Storing Conditions Using Micro-Raman Spectroscopy VL - 87B IS - 2 SP - 468 EP - 474 DO - 10.1002/jbm.b.31128 ER -
@article{ author = "Miletić, Vesna and Santini, Ario", year = "2008", abstract = "The aim of this study was to measure degree of conversion (DC) of resin-based composites (RBCs) using micro-Raman spectroscopy followed by different sample preparation procedures and storing conditions. Ninety samples of Tetric EvoCeram (Ivoclar Vivadent, Schaan, Liechtenstein) were prepared in standardized molds and cured with a high powered LED light-curing unit, bluephase (R)) (Ivoclar Vivadent, Schaan, Liechtenstein) for 20 s. Samples were allocated to eight groups. DC of groups I and 2 was recorded without or after polishing. DC in groups 3 and 4 was recorded from vertically sectioned samples versus "split" samples. DC in groups 5-8 was recorded after storing samples at room temperature and humidity, in 90 +/- 2% humidity at 37 +/- 1 degrees C, distilled water at 37 +/- 1 degrees C or buffered incubation medium (BIM) at 37 +/- 1 degrees C for 24 h. Mean values of DC in polished and unpolished samples were 63.6% (+/- 3.2%) and 54.7% (+/- 5.2%), respectively (p lt 0.0001). There was no significant difference in DC after sample-sectioning (p > 0.05). Significantly higher DC values were obtained after storing samples in BIM (76.8% +/- 2.1%) than in distilled water (59.7% +/- 5.7%), extreme humidity (60.3% +/- 3.9%) or in room conditions (63.6% +/- 3.2%) (P lt 0.001). DC of an RBC measured by micro-Raman spectroscopy may be affected by differences in sample preparation and storing conditions, making it difficult to extrapolate data from in vitro studies into clinically relevant information.", publisher = "Wiley, Hoboken", journal = "Journal of Biomedical Materials Research Part B: Applied Biomaterials", title = "Remaining Unreacted Methacrylate Groups in Resin-Based Composite With Respect to Sample Preparation and Storing Conditions Using Micro-Raman Spectroscopy", volume = "87B", number = "2", pages = "468-474", doi = "10.1002/jbm.b.31128" }
Miletić, V.,& Santini, A.. (2008). Remaining Unreacted Methacrylate Groups in Resin-Based Composite With Respect to Sample Preparation and Storing Conditions Using Micro-Raman Spectroscopy. in Journal of Biomedical Materials Research Part B: Applied Biomaterials Wiley, Hoboken., 87B(2), 468-474. https://doi.org/10.1002/jbm.b.31128
Miletić V, Santini A. Remaining Unreacted Methacrylate Groups in Resin-Based Composite With Respect to Sample Preparation and Storing Conditions Using Micro-Raman Spectroscopy. in Journal of Biomedical Materials Research Part B: Applied Biomaterials. 2008;87B(2):468-474. doi:10.1002/jbm.b.31128 .
Miletić, Vesna, Santini, Ario, "Remaining Unreacted Methacrylate Groups in Resin-Based Composite With Respect to Sample Preparation and Storing Conditions Using Micro-Raman Spectroscopy" in Journal of Biomedical Materials Research Part B: Applied Biomaterials, 87B, no. 2 (2008):468-474, https://doi.org/10.1002/jbm.b.31128 . .