Abstract

EFFECT OF AGING AND IMMERSION IN DIFFERENT SOLUTIONS ON SURFACE PROPERTIES OF DENTURE LINING MATERIAL

Sheamaa Hassin AL-Zaidi* and Dr. Amaal Kadhim AL Saadi B.D.S., MSc

Abstract

Background: Adequate softness and surface integrity are the most important clinical features of soft lining materials. This study was conducted to estimate the effect of aging process and immersion in different solutions on surface hardness and roughness of tissue conditioner material. Materials and Methods: One hundred and fiftyfour acrylic disc specimens with diameter of 20 mm and 3mm in thickness were prepared. To the acrylic discs the same dimensions of temporary soft lining material (tissue conditioner) were bonded, the specimens divided to two equal groups containing 77 specimen for each test and then subdivided to five groups involving [baseline, aging, distilled water, immersion, aging and immersion groups including (corega, Alum+ soda, citric acid+ soda, lemongrass)], 7 specimens for each group, immersion cycle continue for 15 day. After cycle surface hardness and roughness were carried out. Results: the result showed that the hardness highly affected in all procedures, while surface roughness is not affected by aging, but highly affected by immersion and aging+ immersion procedures. Conclusion: the Surface properties of tissue conditioner material effected by experimental solutions and the lemongrass was the least effected solution.

Keywords: Tissue conditioner, surface properties, immersion solutions, aging.