Moldovan Marioara, Balazsi Robert, Soanca Andrada, Roman Alexandra, Sarosi Codruta, Prodan Doina, Vlassa Mihaela, Cojocaru Ileana, Saceleanu Vicentiu, Cristescu Ioan
Department of Polymer Composites, Babes-Bolyai University, Institute of Chemistry Raluca Ripan, 30 Fantanele Str., 400294 Cluj-Napoca, Romania.
Department of Psychology, Babes-Bolyai University, 37 Republicii Street, 400015 Cluj-Napoca, Romania.
Materials (Basel). 2019 Jun 30;12(13):2109. doi: 10.3390/ma12132109.
The novelty of this study consists in the formulation and characterization of three experimental dental composites (PM, P14M, P2S) for cervical dental lesion restoration compared to the commercial composites Enamel plus HRi® - En (Micerium S.p.A, Avengo, Ge, Italy), G-ænial Anterior® - Ge, (GC Europe N.V., Leuven, Belgium), Charisma® - Ch (Heraeus Kulzer, Berkshire, UK). The physio-chemical properties were studied, like the degree of conversion and the residual monomers in cured samples using FTIR-ATR (attenuated total reflectance) and HPLC-UV (ultraviolet detection), as well as the evaluation of the mechanical properties of the materials. The null hypothesis was that there would be no differences between experimental and commercial resin composites regarding the evaluated parameters. Statistical analysis revealed that water and saliva storage induced significant modifications of all mechanical parameters after three months for all tested materials, except for a few comparisons for each type of material. Storage medium seemed not to alter the values of mechanical parameters in comparison with the initial ones for: diametral tensile strength (DTS-saliva for Ge and PM, compressive strength (CS)-water for Ch, DTS-water and Young's modulus YM-saliva for P14M and YM-water/ saliva for P2S ( > 0.05). Two of the experimental materials showed less than 1% residual monomers, which sustains good polymerization efficiency. Experimental resin composites have good mechanical properties, which makes them recommendable for the successful use in load-bearing surfaces of posterior teeth.
本研究的新颖之处在于，与市售复合材料Enamel plus HRi® - En（意大利阿文戈市米切里姆股份公司）、G - ænial Anterior® - Ge（比利时鲁汶市GC欧洲公司）、Charisma® - Ch（英国伯克希尔市贺利氏古莎公司）相比，制备并表征了三种用于修复颈部牙体缺损的实验性牙科复合材料（PM、P14M、P2S）。研究了其物理化学性质，如使用傅里叶变换红外光谱 - 衰减全反射（FTIR - ATR）和高效液相色谱 - 紫外检测（HPLC - UV）法测定固化样品中的转化率和残留单体，还评估了材料的力学性能。原假设是在评估参数方面，实验性和市售树脂复合材料之间不存在差异。统计分析表明，除了每种材料的少数比较情况外，对于所有测试材料，在三个月的水和唾液储存后，所有力学参数都发生了显著变化。与初始值相比，储存介质似乎未改变以下材料力学参数的值：直径拉伸强度（Ge和PM的唾液环境下）、压缩强度（Ch的水环境下）、P14M的直径拉伸强度和杨氏模量（唾液环境下）以及P2S的杨氏模量（水/唾液环境下）（>0.05）。两种实验材料的残留单体含量低于1%，这表明其具有良好的聚合效率。实验性树脂复合材料具有良好的力学性能，这使其推荐用于后牙承重表面的成功修复。
