The effect of immersion cleansers on gloss, colour and sorption of acetal denture base material

Abstract

doi: 10.1111/j.1741‐2358.2012.00657.x The effect of immersion cleansers on gloss, colour and sorption of acetal denture base material Objective: To study the effect of peroxide and hypochlorite cleansers on gloss, colour and sorption of acetal denture resins. Materials and methods: Pink acetal and thermoplastic acrylic resins were evaluated. Thirty‐five specimens 39 × 39 × 1.8 mm of each resin were prepared. Each group of specimens (n = 7) was then immersed into cleansers for 100 days. Group I immersed in tap water, Group II in Corega Extradent for 5 min, Group III in Corega Extradent for 8 h, Group IV in NitrAdine™ Seniors for 15 min and Group V in NaOCl 5.25%. Gloss, colour and weight measurements were taken initially and after 100 days. Data subjected to two‐way anova and Tukey’s test at α = 0.05. Results: Acrylic resin showed reductions of glossiness from −5 to −15 and acetal from −0.2 to −6. Colour changes (ΔΕ*) ranged from 2.64 to 7.64 for acrylic and 2.77 to 26.54 for acetal resin. Sorption for acrylic ranged from 11.64 to 17.06 μg/mm3 and 9.18 to 24.79 μg/mm3 for acetal resin. The results of (ΔΕ*) and sorption showed an interaction between denture resins and cleansers. Conclusions: The gloss of acetal resin was less affected by water, peroxides and NaOCl 5.25% compared with acrylic resin. Acetal resin showed clinically acceptable (ΔΕ*) whereas acrylic resin unacceptable ones for water and peroxide solutions. The immersion of acetal resin in NaOCl 5.25% showed clinically unacceptable (ΔΕ*) and higher sorption and should be avoided or should be managed with care.

Color and gloss evaluation of titanium dioxide coating for acrylic resin denture base

“…However, acrylic resin degrades because of bacteria and fungi adhesion onto it [2,3], microbial invasion and colonization owing to water absorption [4], and surface roughening owing to mechanical and chemical cleaning [5]. Therefore, to improve the quality of the surface of resin, the titanium dioxide coating is used .…”

“…Although self-cleansing action can be added by 4 titanium dioxide coating, there is a possibility that the color of dentures will change by white color of titanium dioxide materials.…”

Bond Strength of Artificial Teeth Attached to a Microwave‐Polymerized Denture Base Resin after Immersion in Disinfectant Solutions

“…Among the denture cleaning methods described in the literature, soaking solutions have been used to reduce biofilm formation on the dentures surface, preventing the proliferation of microorganisms and the development of oral infections, such as denture stomatitis, a relatively common oral infection among denture wearers . Soaking procedures using disinfectants may be useful coadjutants in denture cleaning; however, it is desirable that the immersion of dentures in these products should not cause adverse effects on dental materials as well as not to affect the bond strength between artificial teeth and the acrylic resin denture base . Sodium hypochlorite, chlorhexidine, alkaline peroxides, enzymes, and acids are commonly used as active agents …”

Efeito da incorporação de agentes antimicrobianos sobre propriedades físicas de materiais resilientes temporários para base de prótese

“…A remoção do contato do biofilme das bases acrílicas com os tecidos de suporte das próteses por meio de reembasamento tem sido relatada como eficaz para romper o ciclo de reinfecção por Candida e reduzir o trauma causado por essa superfície contaminada, auxiliando o tratamento da estomatite protética (HOLMBERG, 1980;MARIN ZULUAGA;GOMEZ VELANDIA;RUEDA CLAUIJO, 2011;MEDEIROS;PACHECO, 2000). Se realizado com materiais resilientes, o reembasamento ainda favorece a recuperação dos tecidos injuriados e promove conforto ao paciente (BROWN, 1988;FARRELL, 1975 WATKINSON, 1988;LEITE et al, 2010;PAVAN et al, 2007;PISANI et al, 2010;POLYZOIS et al, 2013 SAHIN, 1999;HAYAKAWA et al, 1997;KAWANO et al, 1994;MANCUSO et al, 2009;PARKER;BRADEN, 1989;PISANI et al, 2010 VAN NOORT, 1985;MARK SALTZMAN et al, 1993). Todos esses mecanismos possivelmente contribuíram para o aumento da solubilidade com a adição de cetoconazol ao Trusoft e Softone.…”