The effect of post-cure heating on residual, unreacted monomer in a commercial resin composite
The effect of post-cure heating on residual, unreacted monomer in a commercial resin composite
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DOI：
10.1016/s0109-5641(00)00006-3
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发表时间：
2000-07-01
期刊：
影响因子：
5
通讯作者：
Rueggeberg, FA
中科院分区：
文献类型：
--
作者：
Bagis, YH;Rueggeberg, FA
目标。本文研究了后固化温度对商业光固化树脂复合修复体在初始光固化和随后的后固化加热后残留的未反应单体量的影响。方法。复合材料圆盘经过光固化，然后立即进行后固化加热（50、75、100 或 125 摄氏度，持续 7 分钟）或不加热（对照）。然后将它们在 37 摄氏度的溶剂中放置两周，以提取未反应的单体。使用 HPLC 分析来测定不同处理后剩余的 TEGDMA、BIS-GMA 和乙氧基化 BIS-GMA 的量。使用方差分析对不同固化处理的每种单体浸出量进行比较。结果。即使是最低的后固化热处理（50 摄氏度），与仅光固化的对照相比，剩余未反应的 TEGDMA 也减少了 80%，BIS-GMA 减少了 75%，乙氧基化 BIS-GMA 减少了 77%。 75℃及以上的后固化加热导致聚合物中未固化的各类单体的量最低，并且在大多数情况下不会随着后固化温度的升高而显着减少。树脂复合材料修复体后固化加热的主要好处之一是可以增强这些修复体的生物相容性，因为潜在的可浸出、未反应的单体显着减少。 (C) 2000 年牙科材料学会。由爱思唯尔科学有限公司出版。保留所有权利。
Objectives. This paper examined the influence of post-cure temperature on the amount of unreacted monomer remaining in a commercial light-cured resin composite restoration following initial light-curing and subsequent post-cure heating.Methods. Discs of composite were light-cured and then subjected to immediate post-cure heating (50, 75, 100, or 125 degrees C for 7 min) or were left unheated (control). They were then placed in a solvent for two weeks at 37 degrees C to extract the unreacted monomer. HPLC analysis was used to determine the amounts of TEGDMA, BIS-GMA, and ethoxylated BIS-GMA remaining after the different treatments. The amounts of each monomer leaching were compared using ANOVA with respect to the different curing treatments.Results. Even the lowest post-cure heat treatment (50 degrees C) resulted in 80% reduction in remaining, unreacted TEGDMA, 75% reduction in BIS-GMA, and 77% lower ethoxylated BIS-GMA than the light-cured only control. Post-cure heating at 75 degrees C and above resulted in the lowest amount of each type monomer remaining uncured in the polymer and did not significantly decrease with an increase in post-cure temperature for the most part.Significance. One of the main benefits of post-cure heating of resin composite restorations could he the enhancement of biocompatibility of these restorations as a result of the significant decrease in potentially leachable, unreacted monomer. (C) 2000 Academy of Dental Materials. Published by Elsevier Science Ltd. All rights reserved.