Tribological, microhardness and color stability properties of a heat-cured acrylic resin denture base after reinforcement with different types of nanofiller particles

Abstract

Background. Polymethyl methacrylate (PMMA) is not an ideal material in all aspects, as it has poor mechanical and antimicrobial properties. The enhancement of the mechanical and physical features of PMMA-based material is highly required.Objectives. The present study aimed to estimate the effect of adding different types of nanoparticle (NP) materials on the mechanical and physical features of heat-cured acrylic resin denture base material. Material and methods.A total of 120 samples were divided into 4 groups: the control group; the 5 wt% ZrO 2 NPs group; the 5 wt% TiO 2 NPs group; and the 5 wt% Ag NPs group. Each one was subdivided into 3 groups according to the test performed: the microhardness test; the abrasive wear test; and the color stability test. Then, the results of these tests were evaluated.Results. The maximum mean value for the microhardness test was observed in the group treated with the addition of 5 wt% Ag NPs, followed by the 5 wt% ZrO 2 NPs group, and finally the 5 wt% TiO 2 NPs group. The lowest mean microhardness value was recorded for the control group. The maximum mean value for the abrasive wear test was attributed to the control group and the lowest mean value was related to the 5 wt% Ag NPs group. The maximum color change was noted in the 5 wt% Ag NPs group, followed by the 5 wt% ZrO 2 NPs and 5 wt% TiO 2 NPs groups. The lowest mean value for the color change was found in the control group. Conclusions.There was an increase in hardness and wear resistance in the group treated by adding 5 wt% Ag NPs, and the control group had the best color stability, followed by the 5 wt% TiO 2 NPs group. However, a detrimental effect on color stability was observed when 5 wt% Ag NPs was added.

Evaluating the influence of Ti6Al4V alloy particles on mechanical properties of heat-cured PMMA

“…Due to the high adhesion between TiO2 NPs and PMMA, the motions of the polymer chain are hampered by TiO2 NP dispersion within the matrix. This was entirely supported by the increase in stiffness of the material as a result of the presence of hard particles throughout the matrix, as well as a reduction in matrix mobility (11).…”

“…The denture base material must be sufficiently abrasive and wear-resistant to prevent severe wear induced by abrasive denture cleansers, food, or general functional stresses. Wear resistance can be improved by improving mechanical qualities, such as hardness (11) .…”

Statistical Comparison of the Mechanical Properties of 3D-Printed Resin through Triple-Jetting Technology and Conventional PMMA in Orthodontic Occlusal Splint Manufacturing

“…Further studies should, therefore, be performed to investigate whether triple-jetting technology could be suitable for occlusal retainers after conventional [ 27 ], lingual [ 28 ], or aligner-based orthodontic treatments [ 29 ]. Additionally, adding different nanofillers [ 30 ] to the compound could enhance some proprieties, as seen in previous studies [ 10 , 11 , 12 , 13 , 14 , 31 , 32 ].…”

Mechanical Properties and Ion Release from Fibre-Reinforced Glass Ionomer Cement

“…Given that water is essential for the adequate maturation of a GIC material, any contamination during the initial setting phases may undermine the physical characteristics of the restoration [ 48 ]. It is noteworthy to mention that enhancing the mechanical properties should not negatively impact the aesthetic properties of the material [ 49 ]. Additional clinical research is needed to examine the adhesion to dentin and the long-term prognosis of GIC reinforced with glass fibres.…”