Effect of Different Solutions on the Colour Stability of Nanoparticles or Fibre Reinforced PMMA

Alhotan, Abdulaziz; Elraggal, Alaaeldin; Yates, Julian; Haider, Julfikar; Jurado, Carlos A.; Silikas, Nick

doi:10.3390/polym14081521

Cited by 10 publications

(11 citation statements)

References 41 publications

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“…In a previous study, it was found that adding 2.0 wt.% TiO 2 NPs to PEMA soft liners resulted in a decrease in hardness, no change in shear bond strength, and an increase in the opacity of the liner material [ 27 ]. Similar results regarding the degradation of the mechanical and color properties of the PMMA denture base with the addition of TiO 2 NPs were also reported [ 37 , 38 , 39 ]. It was found that the surface hardness of a nano-filler reinforced PMMA increased when the TiO 2 NPs concentration was increased [ 37 ].…”

Section: Discussionsupporting

confidence: 84%

Assessing the Antifungal Activity of a Soft Denture Liner Loaded with Titanium Oxide Nanoparticles (TiO2 NPs)

et al. 2023

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Aim: Soft denture lining materials are susceptible to be colonized by different microorganisms, especially by Candida albicans (C. albicans), causing denture-induced stomatitis. This study was designed to evaluate the effectiveness of incorporating titanium dioxide nanoparticles (TiO2 NPs) into a soft denture liner towards reducing microbial activity. Method: A total of 40 PEMA-TiO2 nanocomposites samples were fabricated by adding 0.0 wt.% (control), 1.0 wt.%, 1.5 wt.%, and 2 wt.% TiO2 NPs to a heat cured soft denture lining material (polyethyl methacrylate, PEMA). The prepared samples were divided into four groups (n = 10) according to the content of TiO2 NPs. The uniformity of TiO2 NPS distribution within the denture liner matrix was assessed using a Scanning Electron Microscope (SEM). The viable count of C. albicans was evaluated to test the antifungal resistance of the developed composite. Results: The SEM images showed fairly homogeneous dispersion, with patches of TiO2 NPs agglomeration within the PEMA matrix and an increasing concentration of NPs with higher NP content. The particle map and EDX analysis confirmed the evidence of the TiO2 NPs. The mean viable count results for the control (0.0 wt.%) and 1.0 wt.%, 1.5 wt.%, and 2 wt.% TiO2 groups were 139.80, 12.00, 6.20, and 1.00, respectively, with a significant difference from the control group (p < 0.05). The antifungal activity also increased with the increase in the concentration of TiO2 NPs. Conclusions: The addition of TiO2 NPs into a heat-cured soft denture liner provided antifungal activity as evidenced by the reduced colonization of C. albicans. The antimicrobial activity of the liner material increased with the increased concentration of TiO2 NPS.

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Section: Discussionsupporting

confidence: 84%

Assessing the Antifungal Activity of a Soft Denture Liner Loaded with Titanium Oxide Nanoparticles (TiO2 NPs)

et al. 2023

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“…In this study, coffee appears to have an extreme influence on the CF (coffee) change in comparison to the denture cleaner STD (Steradent)/CF. TiO2-reinforced PMMA in coffee showed the lowest color stability, while the E-glass-fiber-reinforced PMMA in STD/CF showed the highest color stability [36].…”

Section: Discussionmentioning

confidence: 94%

Evaluation of Color Stability of Composite Resin Used to Characterize Acrylic Teeth—An In Vitro Study

Ahamed

Raheel

Ajmal³

et al. 2023

Applied Sciences

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The durability and patient acceptability of prosthesis can be gauged by the capacity of visible light curing lab composite resins to maintain color stability through time and use. Consequently, this study’s goal was to assess the color stability of three layering materials, incisal, dentin, and gingiva of SR Nexco lab composite, with exposure to coffee, Coca-Cola, and turmeric solution using a spectrophotometer. A total of 60 specimens (10 × 2 mm) of SR Nexco paste were prepared and were divided into three groups based on the layering material used. Five specimens of each group were immersed in staining solutions, namely, coffee, cola, and turmeric solution. Each group’s last five specimens were submerged in distilled water (control). The incubator that housed the samples was set to 37 °C. The CIE L*a*b* method was used to quantify the color differences (E) of specimens using a spectrophotometer at baseline and after two weeks of immersion. Using ANOVA testing, the average color change for each specimen was examined. Tukey tests were used for post hoc comparisons. The calculated mean color difference (ΔE) for incisal ranges from 3.73 (distilled water) to 28.70 (turmeric). The mean color difference (ΔE) for dentin ranges from 2.66 (distilled water) to 41.19 (turmeric). The mean color difference (ΔE) for gingiva ranges from 1.72 (distilled water) to 23.88 (turmeric). The results are statistically significant. The maximum color difference is noted for dentin specimens, and turmeric stains all three layering materials to a maximum. The color stability of SR Nexco paste layering materials is significantly affected by the discoloring agents used. The comparison of color change between the three layering materials of SR Nexco paste (dentin, incisal, and gingiva) is statistically not significant. Turmeric solution exhibits more discoloration followed by cola and coffee solution.

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“…Along with thermal fluctuations, the media's chemical environment was identified to influence the properties of polymer resins [30]. In the present study, specimens were subjected to a chemical aging process by immersion in artificial saliva with a cyclic procedure of 6 h at pH = 3, interchanging with 18 h at pH = 7 for 28 days.…”

Section: Discussionmentioning

confidence: 97%

“…Another critical aspect is pointed out in some studies, which concluded that incorporating an antimicrobial drug into resin-based polymers produces color changes with clinical relevance when submitted to stainable liquids, such as coffee and wine [30][31][32]. In the case of CHX used as a mouthwash or gel, brownish staining of the teeth, mucosa, and biomaterials can cause unesthetic results [33].…”

Section: Introductionmentioning

confidence: 99%

Understanding the Mechanical, Surface, and Color Behavior of Oral Bioactive Prosthetic Polymers under Biodegradation Processes

et al. 2023

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Changes in the properties of resin-based polymers exposed to the oral environment can emerge when chlorhexidine (CHX) is incorporated to develop bioactive systems for treating denture stomatitis. Three reline resins loaded with CHX were prepared: 2.5 wt% in Kooliner (K), 5 wt% in Ufi Gel Hard (UFI), and Probase Cold (PC). A total of 60 specimens were submitted to physical aging (1000 cycles of thermal fluctuations, 5–55 °C) or chemical aging (28 days of pH fluctuations in artificial saliva, 6 h at pH = 3, 18 h at pH = 7). Knoop microhardness (30 s, 98 mN), 3-point flexural strength (5 mm/min), and surface energy were tested. Color changes (ΔE) were determined using the CIELab system. Data were submitted to non-parametric tests (α = 0.05). After aging, bioactive K and UFI specimens were not different from the controls (resins without CHX) in mechanical and surface properties. Thermally aged CHX-loaded PC specimens showed decreased microhardness and flexural strength but not under adequate levels for function. The color change was observed in all CHX-loaded specimens that underwent chemical aging. The long-term use of CHX bioactive systems based on reline resins generally does not impair removable dentures’ proper mechanical and aesthetic functions.

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Effect of Different Solutions on the Colour Stability of Nanoparticles or Fibre Reinforced PMMA

Cited by 10 publications

References 41 publications

Assessing the Antifungal Activity of a Soft Denture Liner Loaded with Titanium Oxide Nanoparticles (TiO2 NPs)

Assessing the Antifungal Activity of a Soft Denture Liner Loaded with Titanium Oxide Nanoparticles (TiO2 NPs)

Evaluation of Color Stability of Composite Resin Used to Characterize Acrylic Teeth—An In Vitro Study

Understanding the Mechanical, Surface, and Color Behavior of Oral Bioactive Prosthetic Polymers under Biodegradation Processes

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