ELUTION OF UNCURED MONOMERS RELEASED FROM A RESIN COMPOSITE POLYMERIZED AT THE REDUCED RATE

研究了树脂复合体在还原速率下的聚合对牙本质洞边缘适合性和径向拉伸强度的影响。此外，还通过未固化单体的内部硬度和洗脱度来评价固化程度。综上所述：1.在9 V下聚合120秒，在用三种光固化树脂复合体Palfique Estite、Z-100、Lite-FIL II A2修复的牙本质洞中产生良好的边缘适合性。2.在9 V下聚合120秒的样品表现出理想的硬度，因为这种照射条件产生了与常规条件相当的诺普硬度，12 V为60，临床上使用。3.在9 V下聚合120秒的样品的径向拉伸强度与在12 V下固化60秒的样品没有差别将TEGDMA和Bis-GMA从辐照后的树脂样品Lite-FIL II A.5中洗脱出来。当样品在8V下聚合时，未固化单体的释放量随着辐照时间的增加而减少。6.对于TEGDMA和Bis-GMA，无论是以8V的降速聚合还是以12V的顺序电压进行聚合，洗脱值都没有差别。

The effects of the polymerization of the resin composite at the reduced rate were investigated on marginal adaptation in the dentinal cavities and diametral tensile strength. Besides the degree of cure was evaluated by the internal hardness and elution of uncured monomers on. A light source which enabled to change the light intensity was intended for the aim.To summarize :1.Polymerization at 9 V for 120 seconds resulted in a good marginal adaptation in the dentinal cavities restored with three light-cured resin composites, Palfique Estelite, Z-100, Lite-fil II A.2.The specimens polymerized at 9 V for 120 seconds showed a desirable hardness since this irradiation condition produced comparative Knoop hardness to the ordinal condition, 12 V for 60, used clinically.3.The diametral tensile strengths of the specimens polymerized at 9 V for 120 seconds did not differed to those cured at 12 V for 60 seconds.4.Uncured monomers of HEMA,TEGDMA and Bis-GMA were eluted from the irradiated resin specimens, Lite-fil II A.5.When the specimens were polymerized at the 8 V,the uncured monomers released decreased with an increase in irradiation time.6.For TEGDMA and Bis-GMA the eluted values did not differ whether polymerization was performed at the reduced rate, 8V,or at the ordinal voltage, 12 V.7.Polymerization at the reduced rate possibly produces a resin composite restoration well adapted with desirable mechanical properties.