TY - JOUR
T1 - Effects of extended curing time on the diametral tensile strength, degree of conversion, and monomer release of bulk-fill composite resins
AU - Harahap, S. A.
AU - Eriwati, Y. L.
AU - Triaminingsih, S.
N1 - Publisher Copyright:
© Published under licence by IOP Publishing Ltd.
PY - 2018/9/7
Y1 - 2018/9/7
N2 - This study aims to evaluate the effects of extended curing of bulk-fill composite resins with a light-emitting diode (LED) by investigating the diametral tensile strength (DTS), degree of conversion (%DC), and bis-GMA monomer release (MR). A total of 144 specimens (diameter, 5 mm and thickness, 4 mm) with three different bulk-fill composite resins were investigated by divided them into three groups with curing times of 20, 25, and 30 s, with LED irradiance of 900 mW/cm2. After 24 h of curing, each specimen was analyzed using a universal testing machine, Fourier-transform infrared (FTIR) spectroscopy, and high-performance liquid chromatography (HPLC) to determine the DTS, %DC, and bis-GMA MR, respectively. The data were analyzed using a one-way ANOVA (μ= 0.05). It was observed that DTS increased as the curing time increased for all resins tested but only the differences in the FBF samples were statistically significant. The %DC was in the range 45.92%-74.65% but was not affected by curing time (P ≥ 0.05). FBF exhibited the lowest MR of all the resins. It can be concluded that extending the LED curing time increases the DTS of bulk-fill composite resins but did not affect the %DC or MR.
AB - This study aims to evaluate the effects of extended curing of bulk-fill composite resins with a light-emitting diode (LED) by investigating the diametral tensile strength (DTS), degree of conversion (%DC), and bis-GMA monomer release (MR). A total of 144 specimens (diameter, 5 mm and thickness, 4 mm) with three different bulk-fill composite resins were investigated by divided them into three groups with curing times of 20, 25, and 30 s, with LED irradiance of 900 mW/cm2. After 24 h of curing, each specimen was analyzed using a universal testing machine, Fourier-transform infrared (FTIR) spectroscopy, and high-performance liquid chromatography (HPLC) to determine the DTS, %DC, and bis-GMA MR, respectively. The data were analyzed using a one-way ANOVA (μ= 0.05). It was observed that DTS increased as the curing time increased for all resins tested but only the differences in the FBF samples were statistically significant. The %DC was in the range 45.92%-74.65% but was not affected by curing time (P ≥ 0.05). FBF exhibited the lowest MR of all the resins. It can be concluded that extending the LED curing time increases the DTS of bulk-fill composite resins but did not affect the %DC or MR.
UR - http://www.scopus.com/inward/record.url?scp=85054514137&partnerID=8YFLogxK
U2 - 10.1088/1742-6596/1073/5/052020
DO - 10.1088/1742-6596/1073/5/052020
M3 - Conference article
AN - SCOPUS:85054514137
SN - 1742-6588
VL - 1073
JO - Journal of Physics: Conference Series
JF - Journal of Physics: Conference Series
IS - 5
M1 - 052020
T2 - 2nd Physics and Technologies in Medicine and Dentistry Symposium, PTMDS 2018
Y2 - 18 July 2018 through 18 July 2018
ER -