Effect of 5.25 % Sodium Hypochlorite on Color Stability of Acrylic and Silicone Based Soft Liners and a Denture Base Acrylic Resin

Abstract

The purpose of the current study was to investigate the effect of a chemical disinfectant (sodium hypochlorite 5.25 %) on color stability of a denture base acrylic resin and two processed soft denture lining materials of two different types (acrylic-based and silicone-based). Ten specimens from each type of materials tested were made (2 × 20 × 20 mm). All specimens were immersed in sodium hypochlorite (5.25 %). Colorimetric measurements for each specimen were taken before immersion, and after 24 h and 7 days of immersion. Color changes were evaluated using the CIE L*a*b* colorimetric system. Data were statistically analyzed with one-way analysis of variance (ANOVA) (α = 0.05). ANOVA was followed by Bonferroni test to determine which groups differed from each other. ΔE and ΔL* of the silicone-based liner at the 1st and 7th days of immersion were significantly more than of denture base acrylic resin and acrylic-based liner. Change in ΔL* values of denture base acrylic resin and acrylic-based liner was small and statistically insignificant after 24 h of its immersion. However, the increase in ΔL* values of the acrylic-based liner after 7 days of immersion was considerably more than of denture base acrylic resin. Color changes in denture base acrylic resin and soft denture liners tended to increase with longer immersion times, and the color stability of the soft denture liners was influenced by its chemical type.

Soft denture liners and sodium perborate: sorption, solubility and color change

“…Sorption, solubility and color stability are important properties for maintaining quality of the materials 23 and these properties can be affected by the denture cleanser and periods of immersion [24][25] . Increase of sorption and solubility may result in dimensional change, discoloration, unpleasant odor, separation from the complete denture base and loss of resilience 11,23,26 .…”

“…Saraç et al 20 (2007) agreed that the oxidant is the cause for color change. Salloum et al 25 (2014) affirmed that the chemical type influenced soft denture liners' color stability and that the color changes depend on the period of immersion. In this study, both the saliva and sanitizer solution had a 6.8 pH.…”

Influence of ozone and paracetic acid disinfection on adhesion of resilient liners to acrylic resin

“…Sodium hypochlorite solutions are very effective in various concentrations against microorganism. However, prolonged application may cause bleaching of the denture base and denture liners 6. Microwave irradiation can also be used to disinfect dentures.…”

Avaliação dos efeitos adversos de soluções desinfetantes nas propriedades físicas e mecânicas de materiais para confecção de próteses totais

“…O método químico consiste na imersão da prótese em substâncias químicas com diferentes componentes e mecanismos de ação com objetivo de desorganizar o biofilme e causar a morte dos microrganismos. Vários são os estudos clínicos e laboratoriais que avaliam os efeitos dessas soluções sobre as propriedades físicas e mecânicas da resina acrílica de base, dentes artificiais, reembasadores para próteses totais e metais, bem como a capacidade de remoção de biofilme e atividade antimicrobiana (Davi et al, 2012;Pellizaro et al, 2012;Altieri et al, 2013;Rodrigues et al, 2013;Savabi et al, 2013;Vasconcellos et al, 2013;Al-Saadi, 2014;Amin et al, 2014;Freire et al, 2014;Kurtulmus-Yilmaz;Deniz, 2014;Oliveira et al, 2014;Paranhos et al, 2014;Salloum, 2014;Sczepanski et al, 2014;Tobouti et al, 2016;Yildirim-Bicer et al, 2014;Amin et al, 2015;Arruda et al, 2015;De Souza Porta et al, 2015;Gama et al, 2015;Haghi et al, 2015;Jeyapalan et al, 2015;Neppelenbroek et al, 2015;Panariello et al, 2015;Rodrigues Acosta et al, 2015;Salles et al, 2015;Sorgini et al, 2015;Badaró et al, 2016;Pero et al, 2016;Basavana et al, 2016;Matos et al, 2016). Porém, pode-se verificar a utilização de diferentes períodos de imersão diária e a avaliação dos efeitos destas soluções em um período curto de tempo, não representando a realidade clínica de uso das próteses.…”

“…As soluções comumente estudadas são o hipoclorito de sódio em diferentes concentrações (Pisani et alb, 2010;Silva et al, 2011;Orsi et al, 2011;Pisani et al, 2012;Pellizaro et al, 2012;Altieri et al, 2013;Savabi et al, 2013;Vasconcellos et al, 2013;Amin et al, 2014;Yildirin-Bicer et al, 2014;Al-Saadi, 2014;Salloum, 2014;Gama et al, 2015;Amin et al, 2015;Haghi et al 2015, Jeyapalan et al, 2015Panariello et al, 2015;Pero et al, 2016;Rodrigues Acosta et al, 2015;Basavana et al, 2016;Matos et al, 2016;Arruda et al, 2016) e a 0,5% (Davi et al, 2012;Rodrigues et al, 2013;Freire et al, 2014;Kurtulmus-Yilmaz;Deniz, 2014;Paranhos et al, 2014;Arruda et al, 2015;de Souza Porta et al, 2015;Nepplenbroek et al, 2015;Salles et al, 2015;Sorgini et al, 2015;Badaró et al, 2016); peróxidos alcalinos (Davi et al, 2012;Pellizaro et al, 2012;Rodrigues et al, 2013;Al-Saadi, 2014;Freire et al, 2014;Kurtulmus-Yilmaz;Deniz, 2014;…”