acrylic base resins are widely used in orthopedics and dental surgery. it is generally accepted that due to the incomplete conversion of methyl methacrylate (mma) monomer to the polymer form during polymerization of the resin, some mma monomers remain in the hardened material. mma monomer has been reported to cause abnormalities or lesions in several organs of animals. study of the literatures ...

Objective: The rough surfaces of removable appliances used in pediatric dentistry or orthodontics, may result inan environment for biofilm accumulation, yielding to enamel demineralization. This study aimed assess theeffects adding nanoparticles bioactive glass polymethylmethacrylate promote the antibacterial activityin acrylic resins. Material and Methods: Acrylic resin specimens (20x20x1mm3) ...

A reworkable resin, which is degradable after use, was developed for application as a dental resin with an enhanced stability. dimethacrylate monomer containing ketal linkage in the molecule used monomer. The successfully cured by blue light irradiation (470-nm light) using camphorquinone/amine photoinitiating system. resins were degraded presence of UV- and violet-light sensitive photoacid gen...

Objective: To evaluate color and surface gloss stability of bis-acryl resins resin composites, submitted to artificialstaining with cigarette smoke. Material Methods: Specimens each material were prepared (n=15). Two resincomposites (GrandioSO [RCG], Filtek Supreme [RCZ]) five (Luxatemp Star [BisLUX], Protemp4[BisPRO], Structor3 [BisSTR], Visalys Temp [BisVIS] Yprov [BisYPR]) tested. Initial wa...

Abstract: A novel dust free alginate impression material was formulated and prepared, comprising an alginate polyvinylpyrrolidone and tetraflouroethylene resins, a mixture of liquid paraffin and dimethylpolysiloxane oil as the dust generation controlling agents and processed diatomaceous earth filler which was obtained from Iranian ore. No dusting was detected during the mixing of the powde...

objective: despite great advances made in dental composite resins, their use is associated with some concerns regarding their mechanical properties such as their flexural strength. considering the introduction of different composite resins into the market, there is a need to compare their mechanical properties and particularly flexural strength. this study aimed to compare the flexural strength...