Evaluation of the wear resistance of new nanocomposite resin restorative materials.
Evaluation of the wear resistance of new nanocomposite resin restorative materials.
复制标题
新型纳米复合树脂修复材料的耐磨性评价。
DOI：
10.1016/s0022-3913(08)60105-5
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发表时间：
2008
期刊：
影响因子：
--
通讯作者：
Seghi,RobertR
中科院分区：
文献类型：
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作者：
Yesil,ZeynepDuymus;Alapati,Satish;Johnston,William;Seghi,RobertR
使用复合树脂修复后牙很受欢迎，因为这些材料的性能和外观都得到了改善。本研究的目的是评估最近推出的两种基于纳米填料的复合树脂(Filtek Supreme，Premise)的相对磨损特性，并将它们与已使用多年的更传统的微杂化(Point 4)和微填充(HeliomolRO)材料进行比较。使用俄勒冈健康科学大学口腔磨损模拟器，对每种材料的材料和方法6个试件(厚度2 mm，直径15 mm)进行三体磨损试验，以人牙釉质为相对衬垫，对所有试件进行磨粒磨损和磨损试验。磨损表面的轮廓跟踪被用来确定复合树脂基材的相对磨粒磨损、磨粒磨损和粗糙度(Ra)。在测量显微镜下测定拮抗剂牙釉质磨损面的平均直径。定性的扫描电子显微镜分析也被用来评估由此产生的釉质和复合树脂磨损面的表面外观。数据经单因素方差分析和图基多元回归后检验(α=.05)。结果复合树脂类型对磨损量无显著影响(P=.15)，但对磨粒磨损量有显著影响(P=.02)。传统的微填充复合树脂(HeliomolRO)比纳米混杂材料(Premise)的磨粒磨损要小得多。不同的复合树脂材料所产生的相对釉质磨损面的平均大小无显著差异。与纳米混杂复合树脂(Premise)或微混杂复合树脂(Point4)相比，HeliomolRO导致磨痕内的表面明显粗糙，但与纳米微孔复合树脂(Filtek Supreme)相比没有显著差异。结论与传统材料相比，在所测试的两种复合树脂材料中加入纳米填料并没有显著提高其耐磨性或相对尖磨量。(J假牙2008；99：435-443)
STATEMENT OF PROBLEMThe use of composite resins for the restoration of posterior teeth is popular because of the improved performance and appearance of these materials. Wear resistance continues to be of particular importance when restoring large occlusal areas in posterior teeth.PURPOSEThe purpose of this study was to evaluate the relative wear characteristics of 2 recently introduced nanofiller-based composite resins (Filtek Supreme, Premise) and compare them to the more traditional microhybrid (Point 4) and microfill (Heliomolar RO) materials that have been used for many years.MATERIAL AND METHODSSix specimens (2 mm thick and 15 mm in diameter) of each material were subjected to 3-body wear tests using the Oregon Health Sciences University Oral Wear Simulator to produce abrasive wear and attrition for all specimens using human enamel as the opposing cusp. Profilometric tracings of the worn surfaces were used to determine the relative abrasive wear, attrition wear, and roughness (Ra) of the composite resin substrate. The mean diameter of the antagonist enamel wear facets was determined under a measuring microscope. Qualitative SEM analysis was also used to assess the surface appearance of the resulting enamel and composite resin wear facets. The data were analyzed by 1-way ANOVA and Tukey's multiple range post hoc test (α=.05).RESULTSThe results indicated that the composite resin type did not significantly affect the amount of measured attrition (P=.15) but did significantly affect abrasive wear (P=.02). The conventional microfill composite resin (Heliomolar RO) exhibited significantly less abrasive wear than the nanohybrid material (Premise). There was no significant difference in the average size of the opposing enamel wear facet generated by the different composite resin materials. Heliomolar RO resulted in a significantly rougher surface within the wear track than either nanohybrid composite resin (Premise) or microhybrid composite resin (Point 4) but was not significantly different than nanofilled composite resin (Filtek Supreme).CONCLUSIONSThe incorporation of nanofillers in 2 of the composite resin materials tested did not significantly improve their wear resistance or the amount of opposing cusp wear when compared to the traditional materials tested. (J Prosthet Dent 2008;99:435-443)