OBJECTIVE The aims of current study are to compare complications following cranioplasty (CP) using either sterilized autologous bone or polymethyl methacrylate (PMMA), and to identify the risk factors for two of the most common complications: bone flap resorption (BFR) and surgical site infection (SSI). METHODS Between January 2004 and December 2013, 127 patients underwent CP and were followe...

OBJECTIVES Ease of denture cleaning is of paramount importance in geriatric patients and those with limited dexterity. We have previously investigated methods of coating dentures with titanium dioxide (TiO2 ) and reported the effects (self-cleaning and antibacterial) of such treatments in in vitro studies. This study was to verify the biocompatibility of a TiO2 -coated acrylic resin produced by...

A pressure-sensitive film was used to characterize the asperity contacts along a polymethyl methacrylate (PMMA) interface in the laboratory. The film has structural health monitoring (SHM) applications for flanges and other precision fittings and train rail condition monitoring. To calibrate the film, simple spherical indentation tests were performed and validated against a finite element model...

BACKGROUND Percutaneous vertebroplasty is a well-established procedure consisting of the percutaneous injection of a biomaterial, usually Polymethyl methacrylate (PMMA), into a vertebral body. In most cases, this procedure affords significant pain relief and strengthens the bone. Vertebroplasty is most typically performed successfully with patients with acute compression fractures. OBJECTIVE ...

A study of grade transitions as encountered in polymerization reactors is presented. The results underscore the need for global optimization algorithms to fully realize the benefits of grade transition that are necessarily non-convex. For comparison purposes we use a non-gradient, parallel search, stochastic method, namely differential evolution (DE). Our simulations indicate that while the DE ...

Percutaneous sacroplasty is a safe and effective procedure for sacral insufficient fractures under CT or fluoroscopic guidance; although, few reports exist about sacral metastatic tumors. We designed a pilot study to treat intractable pain caused by a sacral metastatic tumor with sacroplasty. A 62-year-old man and a 38-year-old woman with medically intractable pain due to metastatic tumors of S...

Nano imprint lithography(NIL) is a cost-efficient, highthroughput processing technique to transfer nano-scale patterns onto thin polymer films. Polymers used as the resist include UV cured resins as well as thermoplastics such as polymethyl-methacrylate(PMMA). In this study, an analytic investigation was performed for the NIL process of transferring nano scale patterns onto polymeric films. Pro...

Ferroelectric polymers are the mainstay of advanced flexible electronic devices. How to tailor ferroelectric polymer films for various applications via simple processing approaches is challenging. Here we demonstrate tuning responses can be achieved in blends poly(vinylidene fluoride-trifluoroethylene) (P(VDF-TrFE)) and polymethyl methacrylate (PMMA) prepared a two-step process. The proposed pr...

Polymer nanocomposites samples polyvinylidene fluoride/Polymethyl methacrylate (PVDF/PMMA) mixed with various concentrations of graphene oxide nanoparticles (GO NP's) were created using solution casting and ultrasonic-assisted processes. The characteristics the manufactured polymer studied XRD, FTIR, TEM, TGA, DSC. AC conductivity, dielectric constant, loss PVDF/PMMA-GO examined as a function G...

OBJECTIVE To report the long-term efficacy of custom polymethyl methacrylate implants using high-resolution computed tomographic modeling in the reconstruction of complex orbitofacial defects secondary to trauma. METHODS Nine patients with complex orbitofacial bone defects after trauma were evaluated for this retrospective, nonrandomized, noncomparative study. All the patients underwent recon...