TY  - JOUR
AU  - Miletić, Vesna
AU  - Santini, Ario
PY  - 2012
UR  - https://smile.stomf.bg.ac.rs/handle/123456789/1756
AB  - Objectives: To determine the degree of conversion (DC) over 48 h post-curing of resin mixtures containing trimethylbenzoyl-diphenylphosphine oxide (TPO) initiator cured by a polywave or a monowave LED light-curing unit (LCU). Methods: In resin mixtures based on equal weight percent (wt%) of BisGMA and TEGDMA the following initiators were added: 0.2 wt% camphorquinone (CQ) + 0.8 wt% ethyl-4-dimethylaminobenzoate (EDMAB) (Group 1); 1 wt% TPO (Group 2) and 0.1 wt% CQ + 0.4 wt% EDMAB + 0.5 wt% TPO (Group 3). Half of the samples in each group (n = 5) were cured using a polywave (bluephase (R) G2, Ivoclar Vivadent) or a monowave LED LCU (bluephase (R), Ivoclar Vivadent). The DC was measured using micro-Raman spectroscopy within 5 min and then 1, 3, 6, 24 and 48 h post-irradiation. The data were analysed using general linear model and two-way ANOVA for the factors 'time', 'material', 'surface' and 'LCU' at alpha = 0.05. Results: The initial DC values obtained upon light curing remained similar over a 48 h period. bluephase (R) G2 produced the highest DC in Group 2 followed by Group 3, and Group 1. bluephase (R) resulted in the highest DC in Group 1, followed by Group 2 and Group 3 (p  lt  0.05). Conclusions: Unfilled resin materials containing both TPO- and CQ-amine initiators are effectively cured using bluephase (R) G2. Resin mixture with the same wt% of initiators is better cured when TPO is the only initiator, compared to CQ-amine only or combined TPO and CQ-amine system. After initial light cure, no additional conversion of uncured monomers was detected in an unfilled resin material over 48 h at 37 degrees C.
PB  - Elsevier Sci Ltd, Oxford
T2  - Journal of Dentistry
T1  - Micro-Raman spectroscopic analysis of the degree of conversion of composite resins containing different initiators cured by polywave or monowave LED units
VL  - 40
IS  - 2
SP  - 106
EP  - 113
DO  - 10.1016/j.jdent.2011.10.018
ER  - 

@article{
author = "Miletić, Vesna and Santini, Ario",
year = "2012",
abstract = "Objectives: To determine the degree of conversion (DC) over 48 h post-curing of resin mixtures containing trimethylbenzoyl-diphenylphosphine oxide (TPO) initiator cured by a polywave or a monowave LED light-curing unit (LCU). Methods: In resin mixtures based on equal weight percent (wt%) of BisGMA and TEGDMA the following initiators were added: 0.2 wt% camphorquinone (CQ) + 0.8 wt% ethyl-4-dimethylaminobenzoate (EDMAB) (Group 1); 1 wt% TPO (Group 2) and 0.1 wt% CQ + 0.4 wt% EDMAB + 0.5 wt% TPO (Group 3). Half of the samples in each group (n = 5) were cured using a polywave (bluephase (R) G2, Ivoclar Vivadent) or a monowave LED LCU (bluephase (R), Ivoclar Vivadent). The DC was measured using micro-Raman spectroscopy within 5 min and then 1, 3, 6, 24 and 48 h post-irradiation. The data were analysed using general linear model and two-way ANOVA for the factors 'time', 'material', 'surface' and 'LCU' at alpha = 0.05. Results: The initial DC values obtained upon light curing remained similar over a 48 h period. bluephase (R) G2 produced the highest DC in Group 2 followed by Group 3, and Group 1. bluephase (R) resulted in the highest DC in Group 1, followed by Group 2 and Group 3 (p  lt  0.05). Conclusions: Unfilled resin materials containing both TPO- and CQ-amine initiators are effectively cured using bluephase (R) G2. Resin mixture with the same wt% of initiators is better cured when TPO is the only initiator, compared to CQ-amine only or combined TPO and CQ-amine system. After initial light cure, no additional conversion of uncured monomers was detected in an unfilled resin material over 48 h at 37 degrees C.",
publisher = "Elsevier Sci Ltd, Oxford",
journal = "Journal of Dentistry",
title = "Micro-Raman spectroscopic analysis of the degree of conversion of composite resins containing different initiators cured by polywave or monowave LED units",
volume = "40",
number = "2",
pages = "106-113",
doi = "10.1016/j.jdent.2011.10.018"
}

Miletić, V.,& Santini, A.. (2012). Micro-Raman spectroscopic analysis of the degree of conversion of composite resins containing different initiators cured by polywave or monowave LED units. in Journal of Dentistry
Elsevier Sci Ltd, Oxford., 40(2), 106-113.
https://doi.org/10.1016/j.jdent.2011.10.018

Miletić V, Santini A. Micro-Raman spectroscopic analysis of the degree of conversion of composite resins containing different initiators cured by polywave or monowave LED units. in Journal of Dentistry. 2012;40(2):106-113.
doi:10.1016/j.jdent.2011.10.018 .

Miletić, Vesna, Santini, Ario, "Micro-Raman spectroscopic analysis of the degree of conversion of composite resins containing different initiators cured by polywave or monowave LED units" in Journal of Dentistry, 40, no. 2 (2012):106-113,
https://doi.org/10.1016/j.jdent.2011.10.018 . .

TY  - JOUR
AU  - Santini, Ario
AU  - Miletić, Vesna
AU  - Swift, Michael D.
AU  - Bradley, Mark
PY  - 2012
UR  - https://smile.stomf.bg.ac.rs/handle/123456789/1734
AB  - Objectives: To determine the degree of conversion (DC) and Knoop microhardness (KHN) of resin-based composites (RBCs) containing trimethylbenzoyl-diphenylphosphine oxide (TPO) cured by polywave or monowave LED light-curing units (LCUs). Methods: Three groups (each n = 5) of Tetric EvoCeram (Ivoclar Vivadent), Vit-l-escence (Ultradent) and Herculite XRV Ultra (Kerr) were prepared in Teflon moulds (5 mm in diameter and 2 mm thick) and cured with polywave Bluephase (R) G2 (Ivoclar Vivadent), polywave Valo (Ultradent) or monowave Bluephase (R) (Ivoclar Vivadent; control) resulting in 9 groups. DC and KHN were determined using micro-Raman spectroscopy and Knoop microhardness, respectively. High-performance liquid chromatography and nuclear magnetic resonance spectroscopy were used to confirm the presence or absence of TPO in the three uncured materials. Data were statistically analysed using two-way and one-way ANOVA and DC and KHN were correlated using Pearson's correlation (alpha = 0.05). Results: TPO was confirmed in Tetric EvoCeram and Vit-l-escence but not in Herculite XRV Ultra. All three LCUs produced comparable KHN for Tetric EvoCeram and Herculite XRV Ultra (p > 0.05). Both polywave LCUs resulted in significantly higher KHN for Vit-l-escence and higher DC in Tetric EvoCeram and Vit-l-escence than the monowave Bluephase (R) (p  lt  0.05). Conversely, Bluephase (R) showed higher DC than the two polywave LCUs in Herculite XRV Ultra (p  lt  0.05). Pearson's correlation coefficient was r = 0.818. Conclusions: Polywave LED LCUs improved monomer to polymer conversion and KHN in the two TPO-containing RBCs, but not in Herculite XRV Ultra. DC and KHN were linearly correlated in all three RBCs. Vit-l-escence showed the highest DC and KHN of the three materials tested. Clinical significance: The use of polywave LEDs significantly improves both the DC and KHN of materials which contain TPO. This should be taken into account when curing bleached shades of RBCs even if the manufacturers do not indicate the presence of TPO in their materials.
PB  - Elsevier Sci Ltd, Oxford
T2  - Journal of Dentistry
T1  - Degree of conversion and microhardness of TPO-containing resin-based composites cured by polywave and monowave LED units
VL  - 40
IS  - 7
SP  - 577
EP  - 584
DO  - 10.1016/j.jdent.2012.03.007
ER  - 

@article{
author = "Santini, Ario and Miletić, Vesna and Swift, Michael D. and Bradley, Mark",
year = "2012",
abstract = "Objectives: To determine the degree of conversion (DC) and Knoop microhardness (KHN) of resin-based composites (RBCs) containing trimethylbenzoyl-diphenylphosphine oxide (TPO) cured by polywave or monowave LED light-curing units (LCUs). Methods: Three groups (each n = 5) of Tetric EvoCeram (Ivoclar Vivadent), Vit-l-escence (Ultradent) and Herculite XRV Ultra (Kerr) were prepared in Teflon moulds (5 mm in diameter and 2 mm thick) and cured with polywave Bluephase (R) G2 (Ivoclar Vivadent), polywave Valo (Ultradent) or monowave Bluephase (R) (Ivoclar Vivadent; control) resulting in 9 groups. DC and KHN were determined using micro-Raman spectroscopy and Knoop microhardness, respectively. High-performance liquid chromatography and nuclear magnetic resonance spectroscopy were used to confirm the presence or absence of TPO in the three uncured materials. Data were statistically analysed using two-way and one-way ANOVA and DC and KHN were correlated using Pearson's correlation (alpha = 0.05). Results: TPO was confirmed in Tetric EvoCeram and Vit-l-escence but not in Herculite XRV Ultra. All three LCUs produced comparable KHN for Tetric EvoCeram and Herculite XRV Ultra (p > 0.05). Both polywave LCUs resulted in significantly higher KHN for Vit-l-escence and higher DC in Tetric EvoCeram and Vit-l-escence than the monowave Bluephase (R) (p  lt  0.05). Conversely, Bluephase (R) showed higher DC than the two polywave LCUs in Herculite XRV Ultra (p  lt  0.05). Pearson's correlation coefficient was r = 0.818. Conclusions: Polywave LED LCUs improved monomer to polymer conversion and KHN in the two TPO-containing RBCs, but not in Herculite XRV Ultra. DC and KHN were linearly correlated in all three RBCs. Vit-l-escence showed the highest DC and KHN of the three materials tested. Clinical significance: The use of polywave LEDs significantly improves both the DC and KHN of materials which contain TPO. This should be taken into account when curing bleached shades of RBCs even if the manufacturers do not indicate the presence of TPO in their materials.",
publisher = "Elsevier Sci Ltd, Oxford",
journal = "Journal of Dentistry",
title = "Degree of conversion and microhardness of TPO-containing resin-based composites cured by polywave and monowave LED units",
volume = "40",
number = "7",
pages = "577-584",
doi = "10.1016/j.jdent.2012.03.007"
}

Santini, A., Miletić, V., Swift, M. D.,& Bradley, M.. (2012). Degree of conversion and microhardness of TPO-containing resin-based composites cured by polywave and monowave LED units. in Journal of Dentistry
Elsevier Sci Ltd, Oxford., 40(7), 577-584.
https://doi.org/10.1016/j.jdent.2012.03.007

Santini A, Miletić V, Swift MD, Bradley M. Degree of conversion and microhardness of TPO-containing resin-based composites cured by polywave and monowave LED units. in Journal of Dentistry. 2012;40(7):577-584.
doi:10.1016/j.jdent.2012.03.007 .

Santini, Ario, Miletić, Vesna, Swift, Michael D., Bradley, Mark, "Degree of conversion and microhardness of TPO-containing resin-based composites cured by polywave and monowave LED units" in Journal of Dentistry, 40, no. 7 (2012):577-584,
https://doi.org/10.1016/j.jdent.2012.03.007 . .