不同单体对树脂陶瓷复合材料双键转化率和颜色稳定性的影响

Influence of Different Monomer on Degree of Conversion and Color Stability of Dental Resin/Ceramic Composite Materials

研究了不同单体对树脂陶瓷复合材料双键转化率和颜色稳定性的影响,同时也研究了不同固化方式对树脂陶瓷复合材料双键转化率的影响。实验结果表明,含有不同单体的树脂陶瓷复合材料的双键转化率按Bis-GMA、Bis-EMA、UDMA顺序依次增大,分别为51.87%、69.29%、79.98%,样品在红酒中浸泡后的色差则按前述顺序依次减小,分别为1.780、1.244、0.534。对于不同固化方式,实验中分别采用了光固化、热固化2种单独固化方式和先热后光、先光后热2种双固化方式。结果表明样品双键转化率随热固化温度增加而稍有提高,光固化与热固化间无明显差距。双固化处理的样品具有相比单纯光固化或热固化更高的双键转化率,其中先热固化后光固化的双固化系统的双键转化率达到87.52%,远高于仅热固化的双键转化率77.24%,具有临床意义。

The influence of different monomer on degree of conversion(DC) and color stability of dental resin/ceramic composite materials was studied, as well as the effect of different curing methods. The degrees of conversion of monomer group increase in the order of Bis-GMA, Bis-EMA, UDMA, as 51.87%, 69.29%, 79.98%, respectively. And the color changes of these specimens show the opposite trend, as 1.780, 1.244, 0.534, respectively. When cured in different curing conditions, the degrees of conversion show a slow-growth with the increase of temperature, and light-cured specimens' degrees of conversion on specimens' surface is similar to that of heat-cured ones. Dual cured specimens show higher DC than merely light-cured or heat-cured ones. Thereinto, in dual cured system of heat-light-cured, the DC reaches 87.52%, much higher than 77.24% of merely heat-cured ones, which is of clinical significance.