Cinnamaldehyde and α-terpineol as an alternative for using as denture cleansers: antifungal activity and acrylic resin color stability

Objective: here was investigated the potential of phytoconstituents as cinnamaldehyde and α-terpineol as denture cleansers, which was evaluated the antifungal activity, also their effect on the color change of the poly(methyl)methacrylate (PMMA). Methodology: Candida albicans biofilms were formed on PMMA specimens and exposed a 10 minutes daily treatment with cinnamaldehyde (10 mg/ mL), α-terpineol (10 mg/ mL), NaCl 0.9%, and NaClO 1%. Biofilms were collected, then analyzed the cell viability (CFU/ mL), cell metabolism (MTT), and roughness. Moreover, the color variation of the specimens during seven and 14 days was checked. Kruskal-Wallis, Mann Whitney, and ANOVA one-way were applied (α < 0.05). Results: cinnamaldehyde and α-terpineol decrease the number of viable cells compared to NaCl 0.9% by 76% and 83.2%, respectively (p< 0.05). Both substances reduce biofilm metabolism by around 70% (p< 0.05). Also, the phytoconstituents showed low biofilm roughness, similar to NaClO (p> 0.05), without changing the color of the acrylic resin (p> 0.05). Conclusion: cinnamaldehyde and α-terpineol, at a concentration of 10 mg/ mL, shows antifungal activity on C. albicans biofilms free from PMMA surface changes. From a clinical viewpoint, these substances have a strong potential to be incorporated into denture cleansers solutions.

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Evaluation of color change in acrylic and bisacrylic resin resins in different solutions

Journal of Research in Dentistry ◽

10.19177/jrd.v5e4201776-84 ◽

2018 ◽

Vol 5 (4) ◽

pp. 76

Author(s):

Mone Laiz Bortoli ◽

Cristina Von Appen ◽

Camila Longoni ◽

Carmen Beatriz Borges Fortes ◽

Jefferson Tomio Sanada

Keyword(s):

Color Change ◽

Color Stability ◽

Acrylic Resin ◽

Color Variation ◽

Color Reading ◽

Control Group ◽

Color Changes ◽

Significant Difference ◽

Prosthesis Material ◽

Chlorhexidine Solution

Aim: This work aimed to evaluate the color stability of an acrylic resin chemically activated (ARCA) using different handling techniques, and a bisacrylic resin when exposed to different pigmentation solutions.Material and Methods: Silicon matrixes were confectioned (10x10x3mm) to be used as specimens. The groups were designed as follows: Group Pot, Group Brush, Group Manufacturer and Group Bisacrylic (n=18). Each group was exposed to three different pigmentation solutions: distilled water, coke and chlorhexidine digluconate 0.12%. Three readings were performed for each specimen using a spectrophotometer, and the evaluations were carried out in three different time. After the color reading, three averages and the standard deviation of variation were performed after 24 hours (T1), 7 days (T2) and 14 days (T3). Data were submitted to the ANOVA and 2 criteria and Tukey (P<0.05) in the statistical software SSPS 18 for Macintosh (SPSS Inc., Chicago, USA).Results: When compared the solutions in each group of material, there was no statistically significant difference, except for T3, where the group Dencor Brush and Bisacrylic demonstrated higher color variation in all the solutions, even in the control group, and the values in Chlorhexidine higher than the other, showing greater instability after 14 days.Conclusions: With the results, bisacrylic resin used as provisory prosthesis material presents greater color instability than the ARCA, when submitted to different solutions. Bisacrylic resin and Dencor Brush present significantly visible color changes in chlorhexidine solution after 14 days. All the materials in coke solution present homogeneity in the color change after 7 days exposition to the solution, with no visible color change.

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The Effect of Denture Cleansers on Color Stability, Water Sorption and Solubility of Stained Denture Base Materials

Al-Kitab Journal for Pure Sciences ◽

10.32441/kjps.02.02.p11 ◽

2018 ◽

Vol 2 (2) ◽

pp. 162-173

Author(s):

Mahabad Saleh ◽

Salem Salem

Keyword(s):

Oxalic Acid ◽

Water Sorption ◽

Color Change ◽

Physical And Mechanical Properties ◽

Color Stability ◽

Acrylic Resin ◽

Control Group ◽

Denture Base ◽

Base Materials ◽

Denture Cleansers

Background and Objectives: Denture cleanser is the most widely used method by the patients to maintain clean and healthy dentures but the prolonged use of such cleansers may affect the properties of the denture. The present study was carried out to evaluate the effect of three prepared denture cleansers which were the 4% citric acid, 4% tartaric acid, and 4% oxalic acid in addition to the Protefix a commercially available denture cleansers, on some mechanical and physical properties (color stability, water sorption, and solubility) of acrylic resin (Stellon QC-20) and flexible nylon (Vaplast) denture base materials after immersion in tea solution. Methods: One hundred specimens (100) were prepared in two equal major groups: acrylic resin and Valplast. For each test of the physical and mechanical properties, 50 specimens were prepared, 25 from acrylic resin and 25 from Valplast. Later on, divided into five groups, one group used as a control and immersed in distilled water, and remaining 4 groups used as test groups; by immersing in one of the denture cleansers after staining in tea solutions for 10 days. The effect of denture cleansers on the properties was studied and compared with the control group. Results: Visual examination method showed no color changes for acrylic and slight color change for valplast specimens. Valplast specimens showed higher water sorption and solubility than acrylic. Conclusions: The findings showed that the 4 denture cleansers were equally effective, and did not cause significant alteration in the tested properties. Except acrylic specimens immersed in oxalic acid showed less color stability.

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Effect of Thermocycling on Color Stability of Acrylic Resin Materials Immersed in Denture Cleansers

International Journal of Contemporary Research and Review ◽

10.15520/ijcrr/2018/9/02/421 ◽

2018 ◽

Vol 9 (02) ◽

Author(s):

Ala'a Ibrahim Abou-Obaid

Keyword(s):

Color Change ◽

Color Stability ◽

Acrylic Resin ◽

Color Difference ◽

Control Group ◽

Water Control ◽

Color Measurements ◽

Heat Cure ◽

The Mean ◽

Denture Cleansers

Objective: To evaluate the effect of thermocycling on the color stability of heat and self-cure resins after immersion in denture cleansers. Material and methods: Forty-eight disks of heat and self-cure resins were fabricated. The specimens of each material were divided into 4 subgroups (n = 12) and immersed in different denture cleansers (Distilled water {control}, Corega, StainAway Plus and Polident) daily for 1 week and first color measurements (T1) were recorded (before thermocycing). The specimens were then subjected to 5000 cycles of thermocycling and the second color measurements (T2) were recorded (after thermocycling). Results: A significant increase of color change was noticed in self-cure compared to heat-cure resins after thermocycling (p=0.001). The color change in heat-cure resins immersed in different solutions was insignificant (p>0.05). Whereas, there was significant color changes in self-cure resins among denture cleansers (p<0.05). The mean difference of color change was greater in self-cure resins immersed in Corega (3.93 ± 2.71) and Polident (3.55 ± 2.06) compared to the control group (0.15 ± 1.66) and lower in specimens immersed in Stain Away Plus (1.36 ± 1.60) compared to Corega. There was a significant decrease in the mean of color change after thermocycling in heat-cure resins immersed in distelled water and Stain Away Plus (p<0.05) and in self-cure resins immersed in Corega, Stain Away Plus and Polident compared to color change before thermocycling (p<0.05). Conclusion: Aging process resulted in a significant color change in self-cure compared to heat-cure resins and the value of color difference was varied according to the denture cleanser used.

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Color Stability, Surface Roughness and Flexural Strength of an Acrylic Resin Submitted to Simulated Overnight Immersion in Denture Cleansers

Brazilian Dental Journal ◽

10.1590/0103-6440201302151 ◽

2013 ◽

Vol 24 (2) ◽

pp. 152-156 ◽

Cited By ~ 39

Author(s):

Helena de Freitas Oliveira Paranhos ◽

Amanda Peracini ◽

Marina Xavier Pisani ◽

Viviane de Cássia Oliveira ◽

Raphael Freitas de Souza ◽

...

Keyword(s):

Surface Roughness ◽

Flexural Strength ◽

Color Stability ◽

Acrylic Resin ◽

National Bureau ◽

Alkaline Peroxide ◽

Significant Difference ◽

Color Data ◽

Effervescent Tablet ◽

Denture Cleansers

This study evaluated color stability, surface roughness and flexural strength of acrylic resin specimens after immersion in alkaline peroxide and alkaline hypochlorite, simulating a period of one and a half year of use of overnight immersion. Sixty disc-shaped (16X4 mm) and 80 rectangular specimens (65X10X3.3 mm) were prepared from heat-polymerized acrylic resin (Lucitone 550) and distributed into 4 groups (n=20): C1: without immersion, C2: 8 h immersion in distilled water; AP: 8 h immersion in alkaline peroxide effervescent tablet; SH: 8 h immersion in 0.5% NaOCl solution. Properties were evaluated at baseline and after the immersion. Color data were also calculated according the National Bureau of Standards (NBS). Results were analyzed statistically by ANOVA and Tukey's HSD test (α=0.05). AP (2.34 ± 0.41) caused color alteration significantly higher than C2 (0.39 ± 0.30) and SH (1.73 ± 0.52). The mean ΔE values were classified as indicial for C2 (0.36 ± 0.29) and noticeable for AP (2.12 ± 0.39) and SH (1.59 ± 0.48). SH (0.0195 ± 0.0150) caused significantly higher ΔRa (p=0.000) than the C2 (0.0005 ± 0.0115) and PA (0.0005 ± 0.0157) groups. There was no statistically significant difference (p=0.063) among the solutions for flexural strength (C1: 105.43 ± 14.93, C2: 100.30 ± 12.43, PA: 97.61 ± 11.09, SH: 95.23 ± 10.18). In conclusion, overnight immersion in denture cleansing solutions simulating a year and a half of use did not alter the flexural strength of acrylic resin but caused noticeable color alterations, higher for alkaline peroxide. The 0.5% NaOCl solution caused increase in surface roughness.

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Studies on Denture Cleansers with Berberine Hydrochloride. Part 2. Effects of Denture Cleanser for Color Stability and Surface Roughness of Acrylic Resin and Artificial Teeth.

Nihon Hotetsu Shika Gakkai Zasshi ◽

10.2186/jjps.40.635 ◽

1996 ◽

Vol 40 (4) ◽

pp. 635-639

Author(s):

Kyoumi Nakamoto ◽

Mitsuhiro Tamamoto ◽

Taizo Hamada

Keyword(s):

Surface Roughness ◽

Color Stability ◽

Acrylic Resin ◽

Berberine Hydrochloride ◽

Artificial Teeth ◽

Denture Cleansers

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ADDUCTS OF SUBSTITUTED VINYLOXYCYCLOPRFOPANES WITH THIOLS AS THERMOSTABILIZERS OF PVC

Chemical Problems ◽

10.32737/2221-8688-2021-3-186-195 ◽

2021 ◽

Vol 19 (3) ◽

pp. 186-195

Author(s):

R.Z. Shahnazarli ◽

Keyword(s):

Thermal Stability ◽

Thermal Properties ◽

Antifungal Activity ◽

Chemical Structure ◽

Color Change ◽

Color Stability ◽

Dioctyl Phthalate ◽

Sulfur Containing ◽

Pvc Compositions

The compositions on the basis of PVC, containing dioctyl phthalate as a plasticizer, complex thermal stabilizers – calcium and zinc stearates and adducts of thiophenol and ethanedithiol with gemdiglycidyloxymethylsubstituted cyclopropylvinyl ether as co-stabilizers and biocidal additives were developed. Thermal properties of the developed compositions were investigated and the influence of the synthesized sulfur-containing adducts on the thermal stability and color change of the compositions studied. The tests were carried out to reveal the antifungal activity of adducts in the structure of PVC compositions. It found that the chemical structure of adducts after introduction into the structure of compositions was not essentially changed. The compositions with the participation of adducts as co-stabilizers acquired improved indices on thermal stability, color stability and antifungal activity.

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The Effect of Outdoor Weathering on Color Stability of Silicone and Acrylic Resin, Pigments-A Comparative Evaluation: An in vitro Study

International Journal of Prosthodontics and Restorative Dentistry ◽

10.5005/jp-journals-10019-1135 ◽

2015 ◽

Vol 5 (3) ◽

pp. 81-85

Author(s):

K Lekha ◽

H Dharanendra Kumar

Keyword(s):

Comparative Evaluation ◽

Color Change ◽

In Vitro Study ◽

Color Stability ◽

Acrylic Resin ◽

Silicone Elastomer ◽

Heat Cure ◽

Outdoor Weathering ◽

Cobalt Blue

ABSTRACT Maxillofacial prosthetic materials either resin or elastomer used for the fabrication of facial prostheses have their own physical and mechanical properties. Maxillofacial prosthesis frequent replacement because the elastomer or acrylic resin and its pigments undergo color changes. Purpose Evaluate the effect of outdoor weathering on color stability of silicone and heat-cure acrylic with two different pigments. Materials and methods Total of 80 circular disk specimens, 40 silicone elastomer and 40 heat-cure clear acrylic resin were fabricated in the prepared mold and two dry earth pigments burnt sienna and cobalt blue was added to the specimens and it was subjected to simulated outdoor weathering. Before and after weathering, CIE values of both control and weathering groups were recorded by using spectrophotometer and tabulated. The obtained data were subjected to statistical analysis. Results Silicone elastomer with burnt sienna showed more color change when exposed to weathering followed by silicone with cobalt blue. Heat-cure with cobalt blue had shown some color change, heat-cure and burnt sienna were the most color stable. Conclusion From the study, it can be concluded that heat-cure acrylic resin with burnt sienna most color stable than silicone elastomer. How to cite this article Lekha K, Kumar HD, Meshramkar R, Nadiger RK. The Effect of Outdoor Weathering on Color Stability of Silicone and Acrylic Resin, Pigments-A Comparative Evaluation: An in vitro Study. Int J Prosthodont Restor Dent 2015;5(3):81-85.

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Evaluation of iris color stability in ocular prosthesis

Brazilian Dental Journal ◽

10.1590/s0103-64402008000400015 ◽

2008 ◽

Vol 19 (4) ◽

pp. 370-374 ◽

Cited By ~ 14

Author(s):

Ricardo César dos Reis ◽

Reinaldo Brito e Dias ◽

Jose Carlos Mesquita Carvalho

Keyword(s):

Color Change ◽

Accelerated Aging ◽

Color Stability ◽

Acrylic Resin ◽

Blue Color ◽

Ocular Prosthesis ◽

Green Color ◽

Iris Color ◽

Yellow Color ◽

Ocular Prostheses

Accurate iris reproduction in the fabrication of ocular prosthesis in order to match the remaining eye is a key factor to mask the loss and achieve an esthetic outcome for anophthalmic patients. This study evaluated the stability of acrylic paints used for replicating iris color in ocular prostheses by the analysis of two factors: the temperature of the acrylic resin polymerization cycle during prosthesis fabrication and the incidence of sun light, which is the main photodegrading agent undermining the longevity of ocular prostheses. An accelerated aging assay was used for both analyses. Specimens simulating the prosthetic iris in the colors blue, yellow, black, brown and green were fabricated, and were submitted to a colorimetric reading before and after undergoing the thermal conditions of acrylic resin polymerization. Next, the specimens were submitted to an artificial accelerated aging assay with ultraviolet radiation A and weekly colorimetric readings during a 3-week period. The color change (??*) values for the four specimens painted with the same color paint were averaged and the resulting values were considered for statistical analysis. Levine's test and Student's t-test were used to analyze the influence of the temperature of the polymerization cycle during prosthesis fabrication on the color stability of each acrylic resin paint. Friedman's test for three dependent samples was used for analysis of color photodegradation as function of time. Significance level was set at 0.05 for all analyses. It was observed that, after the action of the temperature of the polymerization cycle, alteration above clinically acceptable level of ??*> 3.3 was observed only for the yellow color. After the accelerated aging assay, there were statistically significant differences (p<0.05) as a function of time in the green, brown, black and blue colors. Changes were clinically acceptable for the brown and black colors; slightly above the clinically acceptable limit for the green color; and significantly high and impracticable from a clinical standpoint for the blue color. There was no statistically significant differences (p>0.05) for the yellow color, which presented color change only a little above the clinically acceptable limit. In conclusion: 1. Only the yellow color presented alterations above the clinically acceptable levels after the polymerization cycle; 2. After accelerated aging, there was no changes in the yellow color above the clinically acceptable levels; 3. For the green color, degradation was significant and slightly above the clinically acceptable levels; 4. The black, brown and blue colors presented significant alterations as function of time; the alterations of the brown and black colors were within acceptable clinical levels, while the blue color presented a more accentuated degradation over time.

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In Vitro Effect of Denture Cleansers on the Color Stability of Polyetheretherketone and Other Denture Base Polymers

Odovtos - International Journal of Dental Sciences ◽

10.15517/ijds.2021.47335 ◽

2021 ◽

pp. 284-293

Author(s):

Samet Tekin

Keyword(s):

Color Change ◽

Color Stability ◽

Chemical Compositions ◽

Denture Base ◽

Color Changes ◽

All Solutions ◽

Significant Difference ◽

Denture Cleansers

The aim of this in vitro study was to compare the long-term effect of overnight use of denture cleansers with different chemical compositions on the color stability of denture base polymers (DBPs). The four DBPs evaluated were PEEK (PK group), thermoinjection-molded polyamide (PA group), auto-polymerized polymethylmethacrylate (PMMA) (AP group), and heat-polymerized resin PMMA (HP group). The cleaning agents used were Corega tablet (CT), Protefix tablet (PT), and 0.5% sodium hypochlorite (NaOCl) solution (SH). Distilled water (DW) served as a control. Forty-eight disc-shaped specimens (10mm × 2mm) were prepared from each DBP and randomly immersed in the different storage media (n=12 in each group). Color measurements of the specimens before and after immersion in the denture cleansers were made using a spectrophotometer (VITA Easyshade V). The color changes were measured and recorded in L* a* b*. After 120 d, the CIEDE2000 formula was used to calculate color changes (∆E00). For analysis of the data, a multivariate analysis of variance was used (p<0.05). The results of the statistical analysis revealed significant color change differences in the DBPs immersed in the various denture cleansers (p<0.05). Groups PA and PK showed the highest values for all solutions. AP-SH showed the highest ∆E00 value in group AP, no significant difference was found between other solutions. In group HP, there was no statistically significant difference between the average ∆E00 values of all solutions. Long-term daily use of the denture cleansers affected the color stability of all the DBPs, although the level of color change was acceptable. Laboratory and clinical studies on the color stability of PEEK are needed to confirm the results of this study.

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