The effect of gypsum products and separating materials on the typography of denture base materials

Effect of gypsum separating media on the appearance of stone cast surfaces

“…However, the application of tinfoil is time consuming, and difficulties can often appear during tinfoil adaptation. 1,4 Because research data on currently used dental stone separating media are lacking, the 2 most currently used materials were chosen for this study. The statistical evaluation of this investigation had to account for individual matching and the fact that each left or right half of the cast was treated with the new separating agent, Iso-K, and the other half had to be treated with the standard material, Al-Cote (control group).…”

“…5 In the palatal area, aluminum foil can be used, and the rest of the mold can be covered with another separating agent. 1 The traditional separating media have been replaced with silicone (Extrude XP; Kerr Corp). Silicone is used to prevent the water contamination of acrylic resin during processing in a water bath, avoid the diffusion of acrylic resin into the dental stone pores, and facilitate the deflasking and polishing steps of the polymerized denture.…”

“…In this procedure, acrylic resin is molded against the gypsum cast surface, and if the cast surface has irregularities, similar discrepancies will be produced on the acrylic resin surface. 1 To achieve a clean acrylic resin surface, an appropriate separating medium must be applied to the stone cast. Two major complications can occur when an inappropriate separating medium is used.…”

Evaluation and Comparison of Effect of Delmopinol Application on Adherence of Candida albicans on Denture Fitting Surface on Three Types of Acrylic Resin: An in vitro Study

“…Adherence of microorganisms and debris is favored by rough or otherwise irregular surface topography. [26][27][28][29] Surface irregularities provide an increase in surface area and expansion in the number of niches not readily cleansed by action of tongue or other orofacial musculature. It has been shown that choosing an appropriate type of smooth acrylic resin could lead to reduced biofilm formation.…”