Ion-releasing polymeric restorative materials seem to be promising solutions, due to their possible anticaries effect. However, acid functional groups (monomers) and glass filler increase hydrophilicity and, supposedly, water sorption. The purpose of the study was to evaluate the influence of water sorption of polymeric materials on the stress state at the restoration-tooth interface. Beautifil Bulk Fill Flow, Beautifil Flow Plus F00, Beautifil Flow F02, Dyract eXtra, Compoglass Flow, Ionosit, Glasiosite, TwinkiStar, Ionolux and Fuji II LC were used for the study. The stress state was measured using photoelastic analysis after: 0.5, 24, 72, 96, 168, 240, 336, 504, 672, 1344 and 2016 h. Moreover, water sorption, solubility and absorption dynamic were assessed. The water sorption, solubility and absorption dynamic of ion-releasing restorative materials are material dependent properties. The overall results indicated that the tested restorative materials showed significant stress decrease. The total reduction in contraction stress and water expansion stress was not observed for materials with low value of water sorption (Beautifil Bulk Fill, Dyract eXtra, Glasionosit and Twinky Star). The photoelastic method turned out to be inadequate to evaluate stress changes of resin modified glass-ionomer cement (RMGI, Fuji II LC and Ionolux).
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机译：由于其可能的防龋效果，释放离子的聚合物修复材料似乎是有前途的解决方案。但是，酸官能团（单体）和玻璃填充剂会增加亲水性，并增加吸水率。该研究的目的是评估聚合物材料的吸水率对修复牙齿界面的应力状态的影响。 Beautifil批量填充流，Beautifil Flow Plus F00，Beautifil Flow F02，Dyract eXtra，Compoglass Flow，Ionosit，Glasiosite，TwinkiStar，Ionolux和Fuji II LC用于研究。在以下时间，0.5、24、72、96、168、240、336、504、672、1344和2016 h后使用光弹性分析测量应力状态。此外，评估了水的吸收，溶解度和吸收动力学。离子释放修复材料的吸水率，溶解度和吸收动力学是材料相关的特性。总体结果表明，测试的修复材料显示出明显的应力降低。对于吸水值低的材料（Beautifil散装，Dyract eXtra，Glasionosit和Twinky Star），未观察到收缩应力和水膨胀应力的总降低。结果证明，光弹性方法不足以评估树脂改性的玻璃离聚物水泥（RMGI，Fuji II LC和Ionolux）的应力变化。
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