Effect of Oil-Extracts as Antifungal on Color Stability of Soft-Liner

Objectives: Loss of softness, increase hardness and colonization of acrylic soft liner denture base material by
C. albicans are significantly inevitable clinical problems, therefore enhancement of softness and giving
antifungal activity to soft liner material to lengthen the life span of it are recommended.
This study were conducted to evaluate the addition of plant fixed oils extract (flax and /or Rosemary) as
antifungal and their effect on color stability of heat cured acrylic soft liner material cured by two different cycles.
Methods: Total number of (112) samples have been prepared in this study. Samples were divided into two
main groups, according to the method of curing into short and long cycles. Each main group has been sub
divided into four sub-groups, according to the type of additive materials { Flax, Rosemary, mixed ( Flax and
Rosemary), and control group}.
Color stability and antifungal tests were applied on each of two main groups (short and long cycle). The color
stability test was done at two different periods of immersion in distilled water (two and thirty days); except for
antifungal tests were done after (two, seven and thirty) days of immersion in distilled water.
Results: The results showed that acceptable levels of color change (ΔE) in vitro were obtained after oils
addition to soft liner (vertex). The soft liner with oil showed antifungal activity to some extent.
Conclusions: Conclusions revealed that the addition of Flax oil and Rosemary oil showed antifungal activity to
some extent, with no effect on the acceptable range of the physical properties (color).