Dental soft polymers: plasticizer composition and leachability

Influence of Storage Methods on the Surface Roughness of Tissue Conditioners

“…We hypothesized that the influence on the surface roughness of the materials would differ according to storage methods. Table 1 lists the four commercial tissue conditioners used in this study with details on the compositions of their powders and liquids 25,26) . Each material was processed according to manufacturer' s recommendations and poured into a polypropylene container (diameter: 18 mm, thickness: 2.5 mm).…”

The effect of crude drugs on the angiogenic property and dynamic viscoelasticity of PEMA-based soft polymer materials

“…Hong et al 5,6) and Jones et al 21) reported the leaching of the plasticizer from the soft polymer materials during clinical use, which may have resulted in the loss of viscoelasticity. Crude drugs can dissolve the plasticizers but do not form gels.…”

“…Dynamic viscoelasticity is an important factor to consider when this material used for tissue conditioning in clinical situation 19) . However, rapid loss of viscoelasticity occurs during clinical use due to the leaching of EtOH and plasticizer into the oral environment 18,[20][21][22] . Therefore, most previous studies are related to improving the life span of soft polymer materials [5][6][7]18,23) .…”

Mechanical properties of experimental silicone soft lining materials

“…In brief, the base part of Silastic ® MDX4-4210 silicone elastomer (MDX) was mixed with hydrophobic surfacetreated silica filler, AEROSIL ® R 812S (R 812S), at different loadings (2,4,6,8,10 phr (parts per hundred parts of rubber)) for 60 min as follows: Exp. E contained 10 phr silica filler Each group was then mixed with catalyst according to the manufacturer recommended ratio of 10:1 by weight using a mixer with mixing speed of 150 rpm for 20 min.…”

“…Generally, acrylic materials have poor elastic properties and harden gradually due to the leaching out of plasticizer and water is absorbed into the polymer 4) . Thus, acrylic materials undergo a marked loss of cushioning effect over time and have permanent deformation.…”