Effect of cleanser solutions on the color of acrylic resins associated with titanium and nickel-chromium alloys

• Published in: Brazilian oral research 2014, Vol.28 (1), p.1-7
• Main Authors: Freitas Oliveira Paranhos, Helena de, Bezzon, Osvaldo Luiz, Davi, Letícia Resende, Felipucci, Daniela Nair Borges, Silva, Cláudia Helena Lovato da, Pagnano, Valéria Oliveira
• Format: Article
• Language: English
• Subjects: Acrylic Resins; Acrylic Resins - chemistry; Alloys - chemistry; Analysis of Variance; Chromium Alloys; Chromium Alloys - chemistry; Color; Dental Disinfectants - chemistry; Dentistry; DENTISTRY, ORAL SURGERY & MEDICINE; Denture Cleansers; Denture Cleansers - chemistry; Humans; Immersion; Materials Testing; Polymerization; Prosthesis Coloring; Random Allocation; Sodium Hypochlorite - chemistry; Surface Properties; Time Factors; Titanium; Titanium - chemistry
• ISSN: 1806-8324; 1807-3107; 1807-3107
• DOI: 10.1590/1807-3107BOR-2014.vol28.0017

This study evaluated the effect of cleanser solutions on the color of heat-polymerized acrylic resin (HPAR) and on the brightness of dental alloys with 180 immersion trials. Disk-shaped specimens were made with I) commercially pure titanium, II) nickel-chromium-molybdenum-titanium, III) nickel-chromium molybdenum, and IV) nickel-chromium-molybdenum beryllium. Each cast disk was invested in the flasks, incorporating the metal disk into the HPAR. The specimens (n=5) were then immersed in solutions containing: 0.05% sodium hypochlorite, 0.12% chlorhexidine digluconate, 0.500 mg cetylpyridinium chloride, a citric acid tablet, one of two different sodium perborate/enzyme tablets, and water. The color measurements (∆E) of the HPAR were determined by a colorimeter in accordance with the National Bureau of Standards. The surface brightness of the metal was visually examined for the presence of tarnish. The results (ANOVA; Tukey test-α=0.05) show that there was a significant difference between the groups (p