The Effect of Food‐Simulating Agents on the Bond Strength of Hard Chairside Reline Materials to Denture Base Resin

Abstract

Food simulating agents did not adversely affect the shear bond strength of Hard GC Reline; however, ethanol and heptane decreased the bond strength of Tokuyama and TDV, respectively. These findings may provide support to dentists to recommend restricted consumption of some foods and beverages for patients who have to use dentures relined with certain hard liners.

The Effects of Food-Simulating Liquids on Surface Roughness, Surface Hardness, and Solubility of Bulk-Fill Composites

“…In the list of chemicals that were identified by the FDA as FSLs are heptane, ethanol, citric acid, and distilled water. 9,10 Each solution caused the destruction of mainly one component of resin-based materials. As reported by Yap et al, 15 Bis-GMA matrix is sensitive to the softening effect of FSLs.…”

“…8 According to the guideline prepared by the American Food and Drug Administration (FDA), the food-simulating liquids (FSLs) were specified as citric acid, ethanol, and heptane. 9,10 The citric acid is present in beverages, fruits, and candy-like foods, whereas the ethanol is present in alcoholic beverages and mouthwashes and heptane simulates butter, fatty meats, and vegetable oils. The factors such as chemical destruction and mechanical abrasion that occur due to the exposure to various solutions within the mouth may damage the surfaces of resin composite restorations and cause discoloration by making the surface roughened, increase in the plaque accumulation, soft tissue inflammation, and recurrent caries.…”

Comparison of the water sorption and solubility of four reline acrylic resins after immersion in food-simulating agents

“…Changes in the mechanical and physical properties of dental materials after immersion in water and other solutions depend on several factors including the chemistry of resin monomer, polymeric matrix polymerization percentage (residual monomer), the filler size, shape, and distribution, and the interfacial characteristics between the filler and resin matrix which relies on the contact area of resin matrix. [33343536] The extent and rate of water sorption are predominantly controlled by the resin polarity, dictated by the concentration of polar sites available to form hydrogen bonds with water and network topology. [3738]…”

Retentive force and dislodgment time variations between three implant overdenture stud attachments in an acidic environment: An in-vitro pilot study

“…The inserts were immersed in distilled water in a thermocycler (SD MECHATRONIK GmbH, Feldkirchen-Westerham, Germany) and subjected to 1000 cycles consisting of alternating 30-s exposures to temperatures of 5 ± 1 °C and 55 ± 1 °C ( Goiato et al, 2014 ). They were subsequently soaked in a citric acid aqueous solution (3.84 g/L; pH = 3.8) in an incubator for 12 days at 37 °C ( Fatemi et al, 2019 ). This procedure was repeated twice.…”

“…This procedure was repeated twice. In total, the specimens underwent 2000 cycles in the thermocycler simulating thermal changes inside an oral environment for 2 years of clinical denture use ( Goiato et al, 2014 ) and 24 days of immersion in the citric acid solution equivalent to 2 years of consumption ( Fatemi et al, 2019 ).…”