Petronijevic Sarcev Branislava, Balos Sebastian, Markovic Dubravka, Sarcev Ivan, Vukcevic Marija, Labus Zlatanovic Danka, Miletic Vesna
Medical Faculty, University of Novi Sad, Hajduk Veljkova 3, 21000 Novi Sad, Serbia.
Faculty of Technical Sciences, University of Novi Sad, Trg Dositeja Obradovica 6, 21000 Novi Sad, Serbia.
Materials (Basel). 2021 Sep 28;14(19):5642. doi: 10.3390/ma14195642.
The objective of this work was to measure and correlate the degree of conversion (DC), mechanical properties and monomer elution from self-, dual- and light-cured core composites. Five samples of each of the following materials were prepared for each test: Clearfil (Core, Photo Core, Automix), Bisco (Core-Flo, Light-Core and Bis-Core). DC was determined using FTIR, compressive and flexural strength and modulus of elasticity using a universal testing machine and microhardness using Vickers hardness. Elution was measured using HPLC. One-way ANOVA with Tukey's post-test and Pearson's correlation were used to statistically analyze the data. DC of Clearfil-Dual (70.1%) and Clerafil-Photo (66.8%) were higher than Clearfil-Self (55.4%) and all Bisco materials (51.4-55.3%). Flexural strength of Clearfilwas higher than that of Bisco composites. The Microhardness of Clearfil-Dual (119.8VHN) and Clearfil-Photo (118.0VHN) were higher compared to other materials. The greatest elution was detected from self-cured materials. DC positively correlated to microhardness and compressive/flexural strength and negatively to BisGMA elution. Clearfil-Photo and Automix showed higher conversion, lower monomer elution and, generally, better mechanical properties. Self-cured composites should not be recommended for routine clinical use as their performance was inferior to dual- and light-cured composites. Microhardness may be used as an indicator of elution.
这项工作的目的是测量并关联自固化、双固化和光固化核复合材料的固化程度（DC）、机械性能和单体洗脱情况。针对每项测试，制备了以下每种材料的五个样本：Clearfil（核材、光固化核材、自动混合装）、Bisco（Core-Flo、Light-Core和Bis-Core）。使用傅里叶变换红外光谱仪（FTIR）测定DC，使用万能试验机测定压缩强度、弯曲强度和弹性模量，使用维氏硬度计测定显微硬度。使用高效液相色谱法（HPLC）测量洗脱情况。采用单因素方差分析（one-way ANOVA）并结合Tukey事后检验和Pearson相关性分析对数据进行统计学分析。Clearfil双固化材料（70.1%）和Clearfil光固化材料（66.8%）的DC高于Clearfil自固化材料（55.4%）以及所有Bisco材料（51.4 - 55.3%）。Clearfil材料的弯曲强度高于Bisco复合材料。与其他材料相比，Clearfil双固化材料（119.8VHN）和Clearfil光固化材料（118.0VHN）的显微硬度更高。自固化材料的洗脱量最大。DC与显微硬度以及压缩/弯曲强度呈正相关，与双甲基丙烯酸缩水甘油酯（BisGMA）洗脱呈负相关。Clearfil光固化材料和自动混合装表现出更高的固化程度、更低的单体洗脱，总体而言机械性能更好。自固化复合材料因其性能不如双固化和光固化复合材料，不建议常规临床使用。显微硬度可作为洗脱的一个指标。
