Effect of various light curing times on the elution of composite components

Effect of various light curing times on the elution of composite components
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不同光固化时间对复合材料组分洗脱的影响

DOI:
10.1007/s00784-015-1698-7
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发表时间:
2015
影响因子:
3.4
通讯作者:
Reichl FX
Reichl FX
中科院分区:
医学2区
文献类型:
--
作者:
Högg C;Maier M;Dettinger-Maier K;Rothmund L;Kehe K;Hickel R;Reichl FX

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目的树脂基复合材料(rbc)的聚合不完全。本研究的目的是确定比制造商推荐的更长固化时间是否会影响红细胞复合成分的释放量。材料与方法对Clearfil AP-X和els超低收缩率复合材料进行4、10、20、40、100和200 s的固化。制造商建议这两种复合材料的光固化时间为20秒。随后,样品在甲醇和水中洗脱1、3和7天,并通过气相色谱/质谱(GC/MS)分析。结果Clearfil - x在甲醇中检出乙二醇二甲基丙烯酸酯(EGDMA)、二乙二醇二甲基丙烯酸酯(DEGDMA)、三乙二醇二甲基丙烯酸酯(TEGDMA)、2-羟基-4-甲氧基二苯甲酮(HMBP)、樟脑醌(CQ)和2,6-二叔丁基-4-甲基苯酚(BHT)。在水溶液中,仅检测到TEGDMA。在特低收缩率的els中,在甲醇中检测HMBP, BHT和CQ。结论与厂家推荐的固化时间相比,延长固化时间可减少大多数复合成分的释放。这样可以减少人体对这些物质的接触。临床相关性甲丙烯酸酯被归类为潜在的过敏原。越来越多的牙医和病人对甲基丙烯酸酯过敏。因此,减少复合成分的洗脱是一个优点。
ObjectivesPolymerization of resin-based composites (RBCs) is incomplete. The aim of the present study was to determine whether a longer curing time than recommended by the manufacturer influences the amount of released composite components of RBCs.Materials and methodsThe composites Clearfil AP-X and els extra low shrinkage were polymerized for six different curing times: 4, 10, 20, 40, 100, and 200 s. Light curing time recommended by the manufacturer for both composites is 20 s. Subsequently, samples were eluted in methanol and water for 1, 3, and 7 days and analyzed by gas chromatography/mass spectrometry (GC/MS).ResultsFor Clearfil AP-X ethylene glycol dimethacrylate (EGDMA), diethylene glycol dimethacrylate (DEGDMA), triethylene glycol dimethacrylate (TEGDMA), 2-hydroxy-4-methoxybenzophenone (HMBP), camphorquinone (CQ) and 2,6-di-tert-butyl-4-methylphenol (BHT) were detected in methanol. In the aqueous eluate, only TEGDMA was detected. In els extra low shrinkage, HMBP, BHT, and CQ were detected in methanol.ConclusionIncreasing the curing time compared to recommendation of the manufacturer reduces the release of most composite components. This could result in less exposure to human due to these substances.Clinical relevanceMethacrylates are classified as potential allergens. An increasing number of dentists and patients show allergic reaction to methacrylates. Therefore, a reduced elution of composite components is an advantage.
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