Dental Poly(methyl methacrylate)-Based Resin Containing a Nanoporous Silica Filler

Abstract

Poly(methyl methacrylate) (PMMA)-based resins have been conventionally used in dental prostheses owing to their good biocompatibility. However, PMMA-based resins have relatively poor mechanical properties. In the present study, a novel nanoporous silica filler was developed and introduced into PMMA-based resins to improve their mechanical properties. The filler was prepared by sintering a green body composed of silica and an organic binder, followed by grinding to a fine powder and subsequent silanization. The filler was added to photocurable PMMA-based resin, which was prepared from MMA, PMMA, ethylene glycol dimethacrylate, and a photo-initiator. The filler was characterized by scanning electron microscopy (SEM), X-ray diffraction analysis, nitrogen sorption porosimetry, and Fourier transform infrared (FT-IR) spectroscopy. The PMMA-based resins were characterized by SEM and FT-IR, and the mechanical properties (Vickers hardness, flexural modulus, and flexural strength) and physicochemical properties (water sorption and solubility) were evaluated. The results suggested that the filler consisted of microparticles with nanopores. The filler at 23 wt % was well dispersed in the PMMA-based resin matrix. The mechanical and physicochemical properties of the PMMA-based resin improved significantly with the addition of the developed filler. Therefore, such filler-loaded PMMA-based resins are potential candidates for improving the strength and durability of polymer-based crown and denture base.

Study on the Mechanical and Aging Properties of an Antibacterial Composite Resin Loaded with Fluoride‐Doped Nano‐Zirconia Fillers

“…Figure 1 showed the SEM micrographs of the experimental CRs, and it could be seen that nano-fillers distributed well over the whole surface of resin matrix. Good dispersibility of fillers was attributed to the mechanical strength of CRs [31]. As presented in Table 1, the three-point bending test showed that the addition of F-zirconia fillers could maintain the flexure strength of experimental CRs.…”

Influence of Novel SrTiO3/MnO2 Hybrid Nanoparticles on Poly(methyl methacrylate) Thermal and Mechanical Behavior

“…Vojdani et al improved hardness by 13% with the addition of 5 wt% of alumina to PMMA [ 24 ]. Hata et al reported a more than 100% increase in hardness with 23% of nanoporous silica [ 25 ]. On the other side, Alhotan et al achieved only a 10% hardness increase with 7% of nano-zirconia [ 26 ].…”

The mechanical and physical properties of microcrystalline cellulose (MCC)/sisal/PMMA hybrid composites for dental applications

“…PMMA, as a transparent thermoplastic, has been developed to be a dental composite material reinforced with various fillers, such as particle, fiber, and particle-fiber. Different filler types have been reported in dental applications, such as TiO 2 [3], ZrO 2 [4], Al 2 O 3 [5], SiO 2 [6,7], and biomaterials of eggshell, seashell, and fish scale [8][9][10] for particle fillers, and natural and synthetic fibers [11,12]. However, there have been only a few studies on the particle-fiber combination, particularly the microcrystalline cellulose (MCC) particles-natural fiber.…”