Micromechanical analysis of nanoparticle-reinforced dental composites

Abstract

The mechanical behavior of TiO 2 nanoparticle-reinforced resin-based dental composites was characterized in this work using a three-dimensional nanoscale representative volume element. The impacts of nanoparticle volume fraction, aspect ratio, stiffness, and interphase zone between the resin matrix and nanoparticle on the bulk properties of the composite were characterized. Results clearly demonstrated the mechanical advantage of nanocomposites in comparison to microfiber-reinforced composites. The bulk response of the nanocomposite could be further enhanced with the increased nanoparticle volume fraction, or aspect ratio, while the influence of nanoparticle stiffness was minimal. The effective Young's modulus and yield strength of the composite was also significantly affected by the interphase stiffness. Results obtained in this work could provide insights for the optimization of nanoparticle-reinforced dental composites.

Reinforcement of flowable dental composites with titanium dioxide nanotubes

“…Nanoparticle volume fraction, aspect ratio and the interface between nanoparticle and matrix affect the composite behavior. The resin matrix molecular structure could be altered at the interface due to interaction with nanoparticles [52]. The C-factor (configuration factor) of the cavity is defined as the ratio of the bonded to unbonded surfaces of the filling.…”

“…Hua et al [52] studied the effect of incorporating TiO 2 nanoparticles in dental composites. They concluded that Young's modulus showed much more rapid increase by adding nanoparticles than by adding glass fibers.…”

Perspectives for Titanium-Derived Fillers Usage on Denture Base Composite Construction: A Review Article

“…Such studies have reported that the most available commercial product for dental restorations could be improved through the addition of n-TiO 2 with relatively large particle size [85]. In addition, the mechanical behavior of n-TiO 2 reinforced resin-based dental composites was investigated by Hua et al [92]. This study demonstrated that the mechanical advantage of nanocomposites over microcomposites could be found in the reinforcing effect of n-TiO 2 with 3% volume fraction on the stiffness, which is the same as a glass fiber with twice the volume fraction.…”

Testing Different Properties of a Light-Cured Denture Base Material after Addition of Silicon Oxide Nanofiller : An in Vitro Study

“…Therefore, the shear strength between nanofiller and (UDMA) polymer chain will be enhanced (20,24) . Another possible explanation since the modulus of elasticity of SiO2 nanofiller is high, greater resistance to the applied load is expected without deformation leads to increment in flexural strength (29) . Moreover, SiO2 nanofiller may interferes with hydrogen bonding between adjacent urethane polymer chains minimizing sliding between one chains to another as illustrated in Fig.3, since additional peak appears at 1049 cm -1 due to Si-o-Si and disappearance of N-H at 3336.96 cm -1 .The results of this study are in agreement with the finding of Qasim et al (25) , who found that the mean of flexural strength of VLCR was improved when carbon nanotubes were added.…”