Improving PMMA resin using graphene oxide for a definitive prosthodontic rehabilitation - A clinical report

Abstract

The use of acrylic resins as a definitive material has shown some advantages comparing to other definitive materials. However, their poor mechanical properties remain a major drawback. In this case report, graphene oxide (GO) was incorporated into polymethyl methacrylate (PMMA) resin for a definitive maxillary rehabilitation, combined with an intraoral digital impression and a three-dimensional facial scan. After 8 months of the placement of the definitive prosthesis, no mechanical, aesthetic, or biologic complications were reported, and the soft tissues showed excellent health and stability. The incorporation of GO in PMMA resins seems to be a suitable option for prosthetic rehabilitation. However, further studies are needed to ensure rigorous scientific support of these techniques and materials. Key words: Computer-aided design, computer-aided manufacturing, dental impression technique, dental prosthesis; graphene oxide.

Investigation of the elastic properties of poly (methyl methacrylate) reinforced with graphene nanoplatelets

“…An ultrasound transducer receives these echoes, including a final one as the ultrasound pulse reflects from the opposite face of the material, attenuating over distance. 6 The speed of the longitudinal and transverse waves in the solid can be obtained from the measured round-trip transit time, Δt, and the measured thickness (d) of material via Equation 7.…”

“…5 The relative weakness of PMMA under fatigue rupture presents a major problem for its longer-term use in service applications. 6 Nanocomposite materials can improve this poor mechanical performance of the polymer. The nanoparticles can be used as fillers to improve the structural characteristics of the polymer.…”

Are Metal-Free Monolithic Crowns the Present of Prosthesis? Study of Mechanical Behaviour

“…The present study used metal-ceramic full coverage crowns as its control group, as according to the literature is the most supported [1,2,3,4,5,10]. The trial compared the control crowns with crowns made from other monolithic and non-monolithic materials with ceramic coverings [2,3,4,5,6,7,8,11], including PMMA doped with graphene nanoparticles, a recently launched dental material [15]. Monolithic zirconia crowns are made with CAD/CAM techniques and allow more conservative dental preparation [13,16,17].…”

“…This means removing about 50% less dental tissue and so constitutes a much more conservative treatment. Another recent development has been the introduction of monolithic materials based on polymethyl methacrylate (PMMA) doped with graphene nanoparticles that have shown promising properties and perhaps represent the future of restorative dentistry, although to date their properties have not been evidenced by in vitro or in vivo trials [15]. Monolithics materials are made with CAD/CAM techniques that require only a few steps and less time for the fabrication of a restoration compared to old traditional methods, but the literature shows survival rates slightly lower than the restorations with a metal/zirconia core and porcelain veneer [16,17].…”

UV Sensor Based on Fiber Bragg Grating Covered with Graphene Oxide Embedded in Composite Materials

“…Since the GO layer located on the surface of the optical fiber is very fragile, that is why it should be properly protected against lamination in a composite material. Poly(methyl methacrylate) (PMMA) was used as a protective material for the GO layer [ 24 ], as it exhibits good adhesion with both the silica glass from which the optical fiber is made ( Figure 1 b) and GO ( Figure 1 d). In addition, it protects the GO layer from reduction.…”