The effect of arabian coffee on acrylic denture base in comparison to other types of coffee

Acrylic resins were introduced in 1936 and have been used to make the denture bases. Acrylic resin is thermally conductive, reasonable permeableness to mouth fluids and stable in colour. Polymetyhl methacrylate resin has been used for a long time as the best choice to make complete or partial dentures, cause it is esthetically accepted and easily manipulated. However, the mechanical properties of acrylic should become better. Numerous studies have had been done to investigate the effects of several factors on denture teeth discolouration, like commercial types of denture teeth, their composition, filler, processes like polishing, mouthwashes, drinks and coloured food. In KSA, café is used up in a modified product called Gahwa (Arabian café). Gahwa is prepared by boiling roasted, crushed café beans with cardamom powder. The aim of the study was to assign the influence of normally made café kinds, in KSA, on polymetyhl methacrylate denture base materials. Acrylic resin patterns were used (the material tested in the present study was heat-cure acrylic resin (Vertex rapid simplified, Holland). They were parted into five groupings; the control and four tentative groupings agreeably to four kinds of café had been used in the study. Each grouping had 10 specimens. Dental stone had been used for molds making, and Vaseline had been used as a separating medium. Colour exchange of acrylic resin had been shown significantly after dipping in the Espresso, the American and the Turkish café. The Espresso café caused most exchanges in colour then; the American and the Turkish kinds come afterward. There was non-significant difference between the Turkish and the American café. But then, no any exchange in colour of the acrylic resin material significantly had been shown with Gahwa. No significant exchange in colour from the patterns dipped in normal Saline (control) and specimens dipped in Gahwa. No meaning variation in the acrylic resin microhardness used in this present article pre- and post-dipping in the kinds of café. Nonetheless the café kinds were not a meaning substitute to exchange the acrylic resin surface microhardness (P>0.05). Though, no meaning variation had been detected between the acrylic resin material and the café kinds (P>0.05). A significant colour exchange had been shown after dipping of the acrylic resin material in Espresso, Turkish and American café. Most change in color been caused by Espresso café after that by Turkish and American café. On the other hand, No colour exchange of acrylic resin and specimens dipped in Gahwa, which expressed no indicative colour exchange from specimens dipped in normal saline. There was no meaning variation on surface microhardness of the acrylic tested in this research in preceding and afterward dipping in the various kinds of café.