Effect of layer thickness on the elution of bulk-fill composite components.
Effect of layer thickness on the elution of bulk-fill composite components.
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层厚度对散装填充复合材料成分洗脱的影响。
DOI：
10.1016/j.dental.2016.10.006
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发表时间：
2017
期刊：
影响因子：
--
通讯作者：
C. Högg
中科院分区：
文献类型：
--
作者：
Lena Rothmund;F. Reichl;R. Hickel;Panorea Styllou;Marianthi Styllou;K. Kehe;Yang Yang;C. Högg
目的：为充分转化（co）单体，以2mm以下厚度的增量分层技术为标准。大块填充树脂复合材料的开发是为了加速修复过程，使高达4毫米厚的增量在一个步骤中固化。本研究的目的是探讨层厚对大块填充复合材料中组分洗脱的影响。方法采用ELS填料、SDR填料和Venus填料三种复合材料，按照生产厂家的说明进行聚合。每种复合材料制备3组，每组4个样品（n= 4）：(1)层厚为2mm的样品；(2)层厚为4mm的样品；(3)层厚为6mm的样品。样品分别在甲醇和水中洗脱24 h和7 d。洗脱液采用气相色谱/质谱（GC/MS）分析。结果共鉴定出11种不同的洗脱物质。随着层厚的增加，甲基丙烯酸酯的洗脱量增加：TEGDMA （SDR散装填料，Venus散装填料），EGDMA （Venus散装填料）。HEMA的洗脱在层厚上无显著差异。在水中浸泡7 d后，层厚为6 mm的SDR散装填充中TEGDMA的浓度最高为146 μg/mL。厚度为6 mm的Venus散装填料的甲醇洗脱液在7 d后检测到的HEMA浓度最高，为108 μg/mL。意义4 mm及以上的层厚可导致部分散装填料组分的洗脱量比2 mm层厚的洗脱量增加。
ObjectiveAn increment layering technique in a thickness of 2 mm or less has been the standard to sufficiently convert (co)monomers. Bulk fill resin composites were developed to accelerate the restoration process by enabling up to 4 mm thick increments to be cured in a single step. The aim of the present study is to investigate the effect of layer thickness on the elution of components from bulk fill composites.MethodsThe composites ELS Bulk fill, SDR Bulk fill and Venus Bulkfill were polymerized according to the instruction of the manufacturers. For each composite three groups with four samples each (n= 4) were prepared: (1) samples with a layer thickness of 2 mm; (2) samples with a layer thickness of 4 mm and (3) samples with a layer thickness of 6 mm. The samples were eluted in methanol and water for 24 h and 7 d. The eluates were analyzed by gas chromatography/mass spectrometry (GC/MS).ResultsA total of 11 different elutable substances have been identified from the investigated composites. Following methacrylates showed an increase of elution at a higher layer thickness: TEGDMA (SDR Bulk fill, Venus Bulk fill), EGDMA (Venus Bulk fill). There was no significant difference in the elution of HEMA regarding the layer thickness. The highest concentration of TEGDMA was 146 μg/mL for SDR Bulk fill at a layer thickness of 6 mm after 7 d in water. The highest HEMA concentration measured at 108 μg/mL was detected in the methanol eluate of Venus Bulk fill after 7 d with a layer thickness of 6 mm.SignificanceA layer thickness of 4 mm or more can lead to an increased elution of some bulk fill components, compared to the elution at a layer thickness of 2 mm.
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各种光固化复合材料成分的洗脱和分解行为
DOI：
10.1016/j.dental.2014.02.022
发表时间：
2014
期刊：
Dental materials : official publication of the Academy of Dental Materials
影响因子：
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作者：
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DOI：
10.1016/j.dental.2015.01.016
发表时间：
2015
期刊：
Dental materials : official publication of the Academy of Dental Materials
影响因子：
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作者：
Rothmund L;Shehata M;Van Landuyt KL;Schweikl H;Carell T;Geurtsen W;Hellwig E;Hickel R;Reichl FX;Högg C
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作者：
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通讯作者：
Hoegg, Christof