PURPOSE The impact strength and the flexural properties of denture base materials are of importance in predicting their clinical performance upon sudden loading. This study compares the impact and transverse strengths and the flexural modulus of three denture base polymers. MATERIALS AND METHODS The investigation included a relatively new microwave-polymerized polyurethane-based denture mater...

The aim of the study was to investigate the flexural and impact strength of 3 commercially available denture base resins after reinforcing them with single walled carbon nanotubes (SWCNT’S). Each acrylic resin was first solubilised in Tetrahydrofuran (THF) and then carbon nanotubes were added in different percentages respectively. A total of 50 specimens were made from each material (Eclipse, T...

Harold Vernon first introduced acrylic polymers as denture base materials in 1937. A survey showed that 33% of denture repairs were to restore debonded teeth.1 Factors that affect the bonding of acrylic resin teeth to the denture base are dewaxing procedures, residual wax on ridge laps of teeth,2 and careless application separating media like sodium alginate to the teeth, leading to contaminati...

The effects of preparative parameters on the surface basicity, composition, and transesterification activities of several Ca-La metal oxide catalysts were investigated. Four different preparation methods: ammonia-ethanol-carbon dioxide precipitation, physical mixing, impregnation, and coprecipitation, were studied. It was found that the ammoniaethanol-carbon dioxide precipitation method resulte...

BACKGROUND The impact strength of denture base resin is of great concern and many approaches have been made to strengthen acrylic resin dentures. The objective of this study was to compare the impact strength of the denture base resin with and without reinforcement and to evaluate the impact strength of denture base resin when reinforced with stainless steel mesh, glass fiber, and polyethylene ...

statement of problem: recent clinical results for zirconia all-ceramic restorations have revealed that the fracture rate 6-15% of the zirconia framework is so low and the core of zirconia has high stability. however, chipping-off fractures of porcelain are the most common reason for failures of zirconia in the fixed partial dentures. objectives: the purpose of this study was to compare the shea...

Modern cordless telephones offer an ECO mode. When this is activated the base station, when idle, does not emit or emits only to a much lesser extent. In addition, the range of the base station (and thus the radiation strength) can be reduced in some models. During the conversation the emission of the handset (and sometimes the base station) is dynamically reduced, depending on the quality of t...