The effect of olive oil and glycerin oil as separating media on the porosity of acrylic resins denture base : a comparative study

الملخص EN

This study aims at establishing the effect of olive oil and glycerin oil as separating media on the porosity of both (heat and cold) cured acrylic resins denture base, and compares these effects with those obtained when other types of separating materials such as tin foil and tin foil substitute (coldmould seal) were used.

Samples were made from semi square acrylic specimens for porosity analysis.

There were 4 experimental groups, each group sub-divided into heat and cold (n = 10 per sub-group): G1) olive oil G2) glycerin oil; G3) tin foil; G4) cold-mould seal.

Porosity was assessed after specimens were immersed in black ink and the pores counted in a microscope.

The results revealed that the cold cure acrylic specimens in general showed more porosity than heat-cure acrylic specimens, and the tin-foil is the best separating medium concerning porosity in heat and cold-cure acrylic specimens, while the porosity are comparable in both olive oil and cold mould seal lined specimens of heat and cold-cure acrylic.

The suggestions that recommended for further studies are to estimate the effect of these separating medium on the mechanical properties of acrylic denture base materials such as transverse, tensile, and impact strength