Resin cure determination by polymerization shrinkage.
Resin cure determination by polymerization shrinkage.
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DOI：
10.1016/0109-5641(95)80060-3
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发表时间：
1995-07
期刊：
影响因子：
--
通讯作者：
F. Rueggeberg;K. Tamareselvy
中科院分区：
文献类型：
--
作者：
F. Rueggeberg;K. Tamareselvy
ObjectivesThis study was designed to develop a methodology that would measure the monomer conversion of dental restorative resins without the use of a infrared spectrometer.MethodsSpecimens were prepared from heat-cured TEGDMA/MMA copolymer comprising of 0，20，40，60，80 and 100 mol % TEGDMA.测量了棒状试样（45 × 7 × 1 mm）和薄膜的固化前后体积。使用树脂体积的变化以及通过红外光谱法测定薄试样的固化。市售的未填充粘结树脂的薄试样的固化也确定使用的收缩方法，并通过常规的红外光谱methods.ResultsThere是没有差异（p = 0.0617）之间的商业树脂的固化值使用传统的IR方法或收缩方法。对于薄膜的每种共聚物组合，所用IR方法和所示收缩方法之间的固化程度也无显著差异（最低p值0.29）。TEGDMA/MMA共聚物棒试样的固化表现出随着TEGDMA比例的增加而降低的固化趋势，并且具有与文献中报道的其他人相似的固化值，从这项研究中得到的证据表明，试样体积法可以用于确定薄膜或散装树脂试样的树脂固化程度。这种方法是一种易于执行的程序，所有调查人员都可以使用，无需昂贵的设备。
ObjectivesThis study was designed to develop a methodology that would measure the monomer conversion of dental restorative resins without the use of an infrared spectrometer.MethodsSpecimens were prepared from heat-cured TEGDMA/MMA copolymers consisting of 0,20,40,60, 80 and 100 mole% TEGDMA. The pre- and post-cure volumes of bar-shaped specimens (45 × 7 × 1 mm) and thin films were measured. The cure of the thin specimens was determined using changes in resin volume as well as by an infrared spectroscopic method. The cure of thin specimens of a commercially available unfilled bonding resin was also determined using the shrinkage method and by conventional infrared spectroscopic methods.ResultsThere was no difference (p = 0.0617) between cure values of the commercial resin using either conventional IR methods or the shrinkage methods. For each copolymer combination of thin films, there was also no significant difference in the extent of cure between the IR method used and the shrinkage method presented (lowest p-value 0.29). The cure of TEGDMA/MMA copolymer bar specimens demonstrated a decreasing trend of cure with increasing proportion of TEGDMA, and had cure values which were similar to others reported in the literature.SignificanceThe evidence from this study demonstrated that the specimen volume method can be used to determine the extent of resin cure of thin film or bulk resin specimens. This method represents an easily performed procedure that can be used by all investigators without expensive equipment.