statement of problem: fracture strength of a denture base resin is of great concern, and many approaches have been used to strengthen acrylic resin dentures. purpose: the aim of this study was to measure the transverse strength of a heat polymerized acrylic resin, after reinforcement with metal wire and two types of glass fibers. materials and methods: forty rectangular specimens (65.0×10.0×3.3...

OBJECTIVE The aim of this study was to evaluate alternative methods for the disinfection of denture-based materials. MATERIAL AND METHODS Two different denture-based materials were included in the study. Before microbial test, the surface roughness of the acrylic resins was evaluated. Then, the specimens were divided into 8 experimental groups (n = 10), according to microorganism considered a...

Background: After polymerization process, heat cured acrylic resin denture base actually still contains residual monomers that can become potential irritants later in oral cavity. Polymerization process is essential to obtain acrylic resin which can meet the requirements of the biocompatible and good physical properties. To meet the requirements, there are several methods of polymerization proc...

Chemical structures of photocured acrylic ester resins were characterized using specific decomposition techniques such as pyrolysis-gas chromatography in the presence of organic alkali and matrixassisted laser desorption/ionization mass spectrometry combined with super critical methanolysis. The resultant products formed through specific cleavage at the ester linkages in the cured resin samples...

Background: Heat-cured acrylic resin is a material that often used for the manufacture of removable partial dentures in dentistry because it uses simple equipment, relatively inexpensive, and easy to repair. Acrylic also has disadvantage, such as low value flexural strength so can cause denture fracture. This study determine effect non-dental glass fiber volume fraction on heat cured resin. Met...

PURPOSE To evaluate the effect of various metal oxides on impact strength (IS), fracture toughness (FT), water sorption (WSP) and solubility (WSL) of heat-cured acrylic resin. MATERIALS AND METHODS Fifty acrylic resin specimens were fabricated for each test and divided into five groups. Group 1 was the control group and Group 2, 3, 4 and 5 (test groups) included a mixture of 1% TiO2 and 1% Zr...

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...

BACKGROUND Flexural strength (FS) of denture base resins (DBRs) had been improved by reinforcing it with different glass fibers. However, a limited data are available on the effect of glass fiber reinforcement with conventional heat-cured resin after prolonged water storage. AIMS AND OBJECTIVES This study aimed to evaluate the reinforcing effect of novel S-glass and nylon fibers on the FS of ...