background and aims. polymethyl methacrylate (pmma) is widely used for the fabrication of removable prostheses. silver nano-particles (agnps) have been added to pmma because of their antimicrobial properties, but their effect on the mechanical properties of pmma is unknown. the aim of this study was to investigate the effects of agnps on the tensile strength of pmma. materials and methods. for ...

Dental modeling resins have been developed for use in areas where highly precise resin structures are needed. The manufacturers claim that these polymethyl methacrylate/methyl methacrylate (PMMA/MMA) resins show little or no shrinkage after polymerization. This study examined the polymerization shrinkage of five dental modeling resins as well as one temporary PMMA/MMA resin (control). The morph...

Polymethyl methacrylate (PMMA) has been widely used in stomatology to prepare denture bases. However, issues such as a porous structure and high water absorption rate facilitate bacterial growth. This study aimed synthesize silver nanoparticle/graphene oxide (AgNPs/GO) composites by the chemical reduction method, which was mixed with PMMA ball milling method improve antibacterial properties of ...

Polystyrene grafted halloysite microspheres (MS@PMHNTs) were prepared by suspension polymerization method, and the MS@PMHNTs reinforced polymethyl methacrylate (PMMA) composite fibers in situ microfibrillation via a twin-screw extruder. The structure mechanical properties of MS@PMHNTs/PMMA characterized scanning electron microscopy, transmission Fourier transform infrared spectroscopy , thermog...

A series of novel zinc oxide / Poly (methyl methacrylate) nanocomposite films with different ZnO contents were prepared through inclusion pre-synthesized nanoparticles. The physical composition and morphology the as-prepared nanocomposites studied by XRD TEM. TEM analyses revealed that nanoparticles have a particle size ~3–5 nm. X-ray diffraction proved presence amorphous PMMA in nanocomposites...

Reported is the manufacture and optimization of inverted micropyramid cavity structures into thermoplastic sheets using roll-to-roll (R2R) embossing. To master, an ultraprecision diamond machining method was applied to create seamless surface a copper-coated hot embossing roller. Using process, roller features were successfully transferred 2 mm thick polymethyl methacrylate (PMMA) sheets. Optim...

The most commonly used material for constructing complete dentures is polymethyl methacrylate (PMMA). However, the strength characteristics of PMMA, such as impact and fatigue strength, are poor, fracturing PMMA a common problem in prosthodontic practice. Reinforcing with various materials, carbon fibers, glass fibers (fiberglass), ultrahigh modulus polyethylene has been suggested to strengthen...

BACKGROUND Reports of recurrence following restructuring of primary giant cell tumor (GCT) defects using polymethyl methacrylate (PMMA) bone cementation or allogeneic bone graft with and without adjuvants for intralesional curettage vary widely. Systematic review and meta-analysis were conducted to investigate efficacy of PMMA bone cementation and allogeneic bone grafting following intralesiona...