The degree of conversion of fiber-reinforced composites polymerized using different light-curing sources.
The degree of conversion of fiber-reinforced composites polymerized using different light-curing sources.
复制标题
使用不同光固化源聚合的纤维增强复合材料的转化程度。
DOI：
10.1016/j.dental.2004.08.001
复制
发表时间：
2005
期刊：
影响因子：
--
通讯作者：
P. Vallittu
中科院分区：
文献类型：
--
作者：
S. Uctasli;A. Tezvergil;L. Lassila;P. Vallittu
目标市场上有不同聚合物基质成分的纤维增强复合材料（FRC）。本研究的目的是比较含有二甲基丙烯酸酯树脂基体或半互穿网络树脂基体的FRC的单体转化程度。此外，不同类型的光固化单元和光照射的持续时间对转化度的影响进行了evaluated. METHODS连续单向纤维浸渍与二甲基丙烯酸酯或半IPN树脂进行了比较。作为对照材料，使用颗粒填料复合树脂和未填充树脂。使用各种照射时间和不同类型的光固化单元（具有标准或涡轮尖端的石英钨卤素、发光二极管和等离子体电弧）使材料光聚合。通过FT-IR光谱法测定单体转化率（DC%）。在聚合后7个不同时间点记录红外光谱，TSANOVA显示材料间和固化单元间差异有显著性（P<0.05）。半互穿网络和二甲基丙烯酸酯基质FRC的DC%与未填充树脂相比无统计学差异（P>0.05）。传统的石英钨卤素与涡轮尖显示最高的DC%（69-72.3%），而等离子弧固化单元显示出最低的转化程度（47-62%）。可以得出结论，当石英-钨或轻-甲基丙烯酸酯树脂时，FRC的半IPN基质与二甲基丙烯酸酯树脂FRC相比没有显示出转化程度的差异。使用发光二极管聚合单元。与发光二极管和石英钨卤素灯相比，等离子弧光固化单元显示出所有材料的转化程度较低。
OBJECTIVESFiber-reinforced composites (FRC) with different polymer matrix compositions are available on the market. The aim of this study was to compare the degree of monomer conversion of FRC that contained either dimethacrylate resin matrix or semi-IPN resin matrix. In addition, the effect of different types of light-curing units and durations of light irradiation on the degree of conversion was evaluated.MATERIALS AND METHODSContinuous unidirectional fibers impregnated with dimethacrylate or semi-IPN resin were compared. As control materials, a particulate filler composite resin and an unfilled resin were used. The materials were photopolymerized using various irradiation times and different types of light-curing units (quartz–tungsten–halogen with standard or turbo tip, light-emitting diode and plasma-arc). Degree of monomer conversion (DC%) was determined by FT-IR spectrometry. The infrared spectra were recorded at seven different time points after polymerization.RESULTSANOVA showed significant differences between the materials tested, and the curing units (P<0.05). The DC% of semi-IPN and dimethacrylate matrix FRC was not statistically different (P>0.05) compared to that of unfilled resin. Conventional quartz–tungsten halogen with turbo tip showed the highest DC% (69–72.3%), whereas the plasma-arc curing unit showed the lowest degree of conversion (47–62%).SIGNIFICANCEWithin the limitations of this study, it can be concluded that semi-IPN matrix of FRC did not show a difference in the degree of conversion compared to dimethacrylate resin FRC when quartz–tungsten or a light-emitting diode polymerization unit was used. The plasma-arc light-curing unit showed a lower degree of conversion with all materials compared to the light-emitting diode and quartz–tungsten–halogen lamps.
光尖距离对树脂复合材料聚合的影响。
DOI：
--
发表时间：
1993
期刊：
The International journal of prosthodontics
影响因子：
--
作者：
Rueggeberg,FA;Jordan,DM
通讯作者：
Jordan,DM
影响因子：
5
作者：
GOLDBERG, AJ;BURSTONE, CJ
通讯作者：
BURSTONE, CJ
影响因子：
5
作者：
Lovell, LG;Newman, SM;Bowman, CN
通讯作者：
Bowman, CN