Polymerization shrinkage and hygroscopic expansion of contemporary posterior resin-based filling materials -: A comparative study
Polymerization shrinkage and hygroscopic expansion of contemporary posterior resin-based filling materials -: A comparative study
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DOI：
10.1016/j.jdent.2007.07.014
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发表时间：
2007-10-01
影响因子：
4.4
通讯作者：
Janda, Ralf
中科院分区：
文献类型：
--
作者：
Ruettermann, Stefan;Krueger, Soren;Janda, Ralf
目的：研究现代后牙树脂基充填材料的聚合收缩和吸湿性。方法：采用阿基米德原理，分别在固化前、固化后20、40、60分钟，在37℃水中放置1h、24 h、7 d、30 d后，测定SureFil(SU)、CeramXMono(CM)、Clearfi AP-X(CF)、Solitaire 2(SO)、TetricEvoCeram(TE)和Filtek P60(FT)的密度。根据密度的变化计算聚合后和在水中每个储存期后的体积变化(Delta V)百分比。在30d后测定所有样品及其养护时间的吸水率和溶解度。结果：AV值与填料用量有关，而与固化时间无关(SU约为-2.0%，CM约为-2.6%，CF约为-2.1%，因此约为-3.3%，TE约为-1.7%，FT约为-1.8%)。吸湿膨胀依赖于水的吸附和溶解。除SU外，所有材料在水分储存后的Delta V接近+1%。结论：聚合收缩与树脂基填充材料的类型有关，而与固化时间无关。收缩不能通过吸湿膨胀来补偿。(C)2007爱思唯尔有限公司。保留所有权利。
Objectives: To investigate the polymerization shrinkage and hygroscopic expansion of contemporary posterior resin-based filling materials.Methods: The densities of SureFil (SU), CeramXMono (CM), Clearfil AP-X (CF), Solitaire 2 (SO), TetricEvoCeram (TE), and Filtek P60 (FT) were measured using the Archimedes' principle prior to and 15 min after curing for 20, 40 and 60 s and after 1 h, 24 h, 7 d, and 30 d storage at 37 degrees C in water. Volumetric changes (Delta V) in percent after polymerization and after each storage period in water were calculated from the changes of densities. Water sorption and solubility were determined after 30 d for all specimens and their curing times. Two-way ANOVA was calculated for shrinkage and repeated measures ANOVA was calculated for hygroscopic expansion (p < 0.05).Results: AV depended on filler load but not on curing time (SU approximate to -2.0%, CM approximate to -2.6%, CF approximate to -2.1%, SO approximate to -3.3%, TE approximate to -1.7%, FT approximate to -1.8%). Hygroscopic expansion depended on water sorption and solubility. Except for SU, all materials showed Delta V approximate to +1% after water storage.Conclusion: Polymerization shrinkage depended on the type of resin-based filling material but not on curing time. Shrinkage was not compensated by hygroscopic expansion. (C) 2007 Elsevier Ltd. All rights reserved.