The Effect of Nanofilled Resin-Base Coating on the Mechanical and Physical Properties of Resin Composites

Abstract

Objective The aim of this study was to evaluate the effects of a nanofilled resin-base coating on the physical and mechanical properties of four different types of resin composites. Materials and Methods Disc-shaped specimens of four resin composites (Aura bulk fil [SDI], IPS Impress Direct [Ivoclar], Filtek Z250, and Filtek P60 [3M/ESPE]) were prepared and divided in two groups: either uncoated or coated with G-coat plus (n = 10). The specimens were obtained and stored in distilled water (DW) at 37°C. For water sorption and solubility, the specimens were stored for 60 days in DW and measured according to ISO 4049 instructions. The specimens were subjected to color change (ΔE), microhardness, and flexural strength (FS) measurements after 24 hours and 60 days of immersion in DW. Statistical analysis ANOVA, post hoc Tukey’s, and independent t-tests were used to analyze data. Results Mean solubility values of coated groups were significantly lower than that of uncoated ones (p < 0.001). No significant differences were detected between neither water sorption nor FS of coated and uncoated groups (p = 0.502 and p = 0.510, respectively). For all materials except IPS Empress, the mean values for ΔE were not statistically different between coated and uncoated groups, and mean microhardness values of the uncoated groups were significantly greater than the coated groups (p < 0.001). Conclusion Coating resin composites improved water sorption and solubility but increased ΔE, decreased microhardness, and had no significant effect on FS in the long run.

Mechanical Properties of Experimental Composites with Different Photoinitiator

“… 35 The resin composition has an impact on the solubility behavior of resin composites. 36 The greater the bonding between the components of polymer, the greater its resistance to plasticization by solvent action. That is because the closer the particles are inside the matrix, the lower solution would be able to penetrate its structure and change its characteristics.…”

Physical and Mechanical Properties of Bulk-Fill, Conventional, and Flowable Resin Composites Stored Dry and Wet

“…However, significant differences were found between materials in terms of ∆ E 2 and ∆ E 3 in both dry and wet conditions ( P < 0.05) with the greatest ∆ E 3 being reported in AB. The differences observed in colour susceptibility among different resin composites may be due to their different compositions [ 59 ], setting reaction, and degree of polymerization which affects both water sorption and colour change of aesthetic restorative materials [ 60 , 61 ].…”

Avaliação Da Microdureza Superficial De Resinas Nanoparticuladas Submetidas Ao Desafio Erosivo / Evaluation of the Surface Microhardness of Nanoparticulate Resins Submitted to Erosive Challenge

“…A resina composta Filtek™ Z350 XT da 3M foi escolhida para os testes deste artigo devido às suas indicações para dentes anteriores e posteriores e pelas vantagens, já relatadas previamente na literatura, como menor contração da polimerização, propriedades mecânicas otimizadas, efeito visual favorecido, melhor brilho, estabilidade da cor melhorada e menor desgaste, sendo um avanço significativo no que diz respeito ao desempenho clínico (LI et al, 2021;YADAV & KUMAR, 2019). Ainda nesse sentido, estudos mostraram que as resinas nanoparticuladas apresentaram valores de resistência flexural superiores às das resinas com partículas de carga maiores (MOGHADDASI et al, 2021). A resina Filtek™ One Bulk Fill da 3M também foi selecionada para os testes em razão da sua crescente indicação clínica, das suas propriedades mecânicas satisfatórias, estética e da possibilidade dela poder ser inserida em um único incremento em uma cavidade (LI et al,2015).…”