scholarly journals Color Stability and Surface Properties of PMMA/ZrO2 Nanocomposite Denture Base Material after Using Denture Cleanser

2021 ◽  
Vol 2021 ◽  
pp. 1-10
Author(s):  
Mohammed M. Gad ◽  
Reem Abualsaud ◽  
Shaimaa M. Fouda ◽  
Ahmed Rahoma ◽  
Ahmad M. Al-Thobity ◽  
...  
Keyword(s):  
Surface Roughness ◽  
Adverse Effects ◽  
Base Material ◽  
Color Stability ◽  
Zro2 Nanoparticles ◽  
Distilled Water ◽  
Denture Base ◽  
Base Resin ◽  
Denture Cleansers ◽  
Denture Base Resin

Statement of Problem. Novel polymethyl methacrylate (PMMA) containing zirconium dioxide nanoparticles (nano-ZrO2) was suggested as a denture base material but there is a lack of information regarding denture cleanser effects. Objectives. This study aimed to evaluate denture cleanser effects on color stability, surface roughness, and hardness of PMMA denture base resin reinforced with nano-ZrO2. Materials and Methods. A total of 420 specimens were fabricated of unreinforced and nano-ZrO2 reinforced acrylic resin at 2.5% and 5%, resulting in 3 main groups. These groups were further subdivided (n = 10) according to immersion solution (distilled water, Corega, sodium hypochlorite, and Renew) and immersion duration. Surface roughness, hardness, and color were measured at baseline (2 days-T0) in distilled water and then after 180 and 365 days of immersion (T1 & T2) in water or denture cleansing solutions. Data was collected and analyzed using two-way ANOVA followed by Bonferroni post hoc test (α = 0.05). Results. Surface roughness increased significantly after denture cleanser immersion of unmodified and nano-ZrO2-modified PMMA materials while hardness decreased ( P < 0.001 ). The denture cleansers significantly affected the color of both PMMA denture bases ( P < 0.001 ). The immersion time in denture cleansers significantly affected all tested properties ( P < 0.001 ). Within denture cleansers, NaOCl showed the highest adverse effects ( P < 0.05 ) while Renew showed the least adverse effects. Conclusion. Denture cleansers can significantly result in color change and alter the surface roughness and hardness of denture base resin even with ZrO2 nanoparticles addition. Therefore, they should be carefully used.

scholarly journals Effect of Different Denture Base Cleansers on Surface Roughness of Heat Polymerised Acrylic Materials with Different Curing Process

2020 ◽  
pp. 281-289
Author(s):  
Kubra Degirmenci ◽  
Mustafa Hayati Atala ◽  
Canan Sabak
Keyword(s):  
Surface Roughness ◽  
Base Material ◽  
Chlorhexidine Gluconate ◽  
Distilled Water ◽  
Short Term ◽  
Denture Base ◽  
Cleaning Agents ◽  
Significant Difference ◽  
Post Hoc

Avoiding biofilm formation on dentures is associated with maintaining the surface properties of acrylic-based dentures. The aim of the study is to investigate the effects of two different cleaning agents (Corega and Klorhex 0.2% chlorhexidine gluconate) on surface roughness of the denture regarding efficacy of curing procedures. A total of sixty disc-shaped specimens were prepared with two different methods as long and short curing processes. The specimens were divided into subgroups according to the immersion solutions (distilled water, Corega tablet group and Klorhex 0.2% chlorhexidine gluconate group) (n=10). The samples were kept in a solution for 8 hours per day during a month. The average Ra1 (before exposure to the cleanser agent) and Ra2 (after exposure to the cleanser agent) of each sample was measured. A two-way ANOVA and post hoc Tukey test was used for statistical analysis. The solutions significantly increased the Ra values in both acrylic groups (p<0.001). While the effect of the distilled water group was significantly lower than Corega and Klorhex in the long-term curing group (p<0.05), no significant difference was found in the short-term curing group (p>0.05). The long-term curing time is highly effective in decreasing the surface roughness of the acrylic base material.

scholarly journals Effects of SiO2 Incorporation on the Flexural Properties of a Denture Base Resin: An In Vitro Study

2021 ◽  
Author(s):  
Sara T. Alzayyat ◽  
Ghadah A. Almutiri ◽  
Jawhara K. Aljandan ◽  
Raneem M. Algarzai ◽  
Soban Q. Khan ◽  
...  
Keyword(s):  
Elastic Modulus ◽  
Flexural Strength ◽  
Testing Machine ◽  
Base Material ◽  
Bending Test ◽  
Control Group ◽  
Denture Base ◽  
Nano Sio2 ◽  
Base Resin ◽  
Denture Base Resin

Abstract Objective The aim of this study was to evaluate the effects of the addition of low-silicon dioxide nanoparticles (nano-SiO2) on the flexural strength and elastic modulus of polymethyl methacrylate (PMMA) denture base material. Materials and Methods A total of 50 rectangular acrylic specimens (65 × 10 × 2.5 mm3) were fabricated from heat-polymerized acrylic resin. In accordance with the amount of nano-SiO2, specimens were divided into the following five groups (n = 10 per group): a control group with no added SiO2, and four test groups modified with 0.05, 0.25, 0.5, and 1.0 wt% nano-SiO2 of acrylic powder. Flexural strength and elastic modulus were measured by using a 3-point bending test with a universal testing machine. A scanning electron microscope was used for fracture surface analyses. Data analyses were conducted through analysis of variance and Tukey’s post hoc test (α = 0.05). Results Compared with the control group, flexural strength and modulus of elasticity tended to significantly increase (p ˂ 0.001) with the incorporation of nano-SiO2. In between the reinforced groups, the flexural strength significantly decreased (p ˂ 0.001) as the concentrations increased from 0.25 to 1.0%, with the 1.0% group showing the lowest value. Furthermore, the elastic modulus significantly increased (p ˂ 0.001) at 0.05% followed by 1.0%, 0.25%, 0.5%, and least in control group. Conclusion A low nano-SiO2 addition increased the flexural strength and elastic modulus of a PMMA denture base resin.

Effects of Fiber-Resin Interface Property on Shape Recovery and Mechanical Properties of Denture-Base-Resin Matrix Smart Composite

2007 ◽  
Vol 539-543 ◽  
pp. 3279-3284 ◽  
Author(s):  
Kenichi Hamada ◽  
Fumiaki Kawano ◽  
Kenzo Asaoka
Keyword(s):  
Shape Change ◽  
Base Material ◽  
Bending Test ◽  
Resin Matrix ◽  
Niti Shape Memory Alloy ◽  
Interface Debonding ◽  
Denture Base ◽  
Pull Out ◽  
Base Resin ◽  
Denture Base Resin

NiTi shape memory alloy fiber-embedded denture-base-resin matrix smart composites were developed as a new denture base material for a “smart denture”, whose shape could be recovered simply by heating after fracture. Three types of fiber surface treatment were applied for the composites and their properties were evaluated by the fiber-pull-out test and bending test, and shape change after repair was examined. A high interface debonding strength increased the fracture strain but did not affect bending strength, and a low interface sliding strength minimized shape change after repair. These results indicate that the fiber-matrix interface with a strong bonding but easy sliding after debonding could improve the preciseness of “smart repair”.

scholarly journals Non-Thermal O2 Plasma Efficacy on C. albicans and Its Effect on Denture Base Resin Color

2021 ◽  
Vol 11 (21) ◽  
pp. 10367
Author(s):  
Christina Maillet ◽  
Serge Odof ◽  
Mikaël Meuret ◽  
Florian Le Bras ◽  
Frédéric Velard ◽  
...  
Keyword(s):  
Low Pressure ◽  
Denture Base ◽  
Denture Stomatitis ◽  
Log Reduction ◽  
Color Changes ◽  
Colony Forming Units ◽  
Base Resin ◽  
Denture Cleansers ◽  
Denture Base Resin ◽  
O2 Plasma

Denture stomatitis is a disease involving C. albicans, which can affect elderly and immuno-compromised people. To avoid any recurrence of this pathology, it is necessary to treat patients regularly and disinfect dentures. However, the denture cleansers’ efficacy is not optimal and often leads to adverse color effects on the denture base resins. The aim of this study was to investigate the efficacy of a low-pressure non-thermal O2 plasma (NTP) treatment on C. albicans seeded on ProBase®Hot resin (Ivoclar Vivadent). The viability reduction of C. albicans was assessed by colony forming units (CFU) analysis and by scanning electron microscopy (SEM). The effect of repeated treatments on the resin color was evaluated by spectrophotometry. The resin samples were placed in a sealed bag in which O2 plasma was generated in low-pressure conditions. The results showed that a 120-min O2 NTP treatment led to a 6-log reduction of C. albicans viability (p < 0.05) and to yeasts’ major alterations observed by SEM. Furthermore, significant slight color changes of the resin (∆E00 = 1.33) were noted only after six plasma treatments (p < 0.05). However, the denture aesthetic was preserved, as the color changes were not perceptible and remained below the acceptability threshold (∆E00 < 4).

scholarly journals Evaluation of Destaining Property of Denture Cleansers on Heat-cured Denture Base Resins using Common Indian Food Stains

2017 ◽  
Vol 7 (2) ◽  
pp. 53-59
Author(s):  
Sandhya Gopalakrishnan ◽  
KR Kashinath
Keyword(s):  
Sodium Hypochlorite ◽  
Immersion Time ◽  
High Impact ◽  
Sodium Perborate ◽  
Denture Base ◽  
Base Resin ◽  
Density Values ◽  
Indian Food ◽  
Denture Cleansers ◽  
Denture Base Resin

ABSTRACT Aim To compare the efficacy of two different denture cleansers in removing tea and paan stains from conventional and high-impact heat-cured denture base resins and also to find out the duration of contact required by the dentures with cleansers, for best results. Materials and methods A total of 80 specimens (40 conventional and 40 high impact) were fabricated. The samples were stained with tea and paan solutions. Stained samples were subjected to immersion in denture cleansers, namely Dentural (sodium hypochlorite) and Fitty Dent (sodium perborate). Optical density values were measured using spectrophotometer at prestain, poststain, postcleansing 15 minutes, postcleansing 8 hours, and post cleansing brushing. The data were analyzed statistically. Results High-impact denture base resins stained more than the conventional denture base resin. Staining potential of paan solution was higher than that of tea solution. Dentural (sodium hypochlorite) is superior to Fitty Dent (sodium perborate) in the removal of stains at postcleaning 15 minutes and 8 hours immersion time in both the denture bases and 8 hours immersion time is better. Conclusion Both cleansers were effective in removing stains from denture surface, and Dentural is a better cleanser than Fitty Dent for all the postcleansing stages. Clinical significance Adequate removal of extrinsic stains from denture surface is essential for the health of the supportive area. The clinician must suggest an acceptable cleansing regime to the patient. How to cite this article Gopalakrishnan S, Kashinath KR, Mathew P. Evaluation of Destaining Property of Denture Cleansers on Heat-cured Denture Base Resins using Common Indian Food Stains. Int J Prosthodont Restor Dent 2017;7(2):53-59.

scholarly journals Impact of ZrO2 nanoparticles addition on flexural properties of denture base resin with different thickness

2021 ◽  
Vol 13 (4) ◽  
pp. 226
Author(s):  
Sara Albasarah ◽  
Hanan Al Abdulghani ◽  
Nawarah Alaseef ◽  
Faisal D. al-Qarni ◽  
Sultan Akhtar ◽  
...  
Keyword(s):  
Zro2 Nanoparticles ◽  
Flexural Properties ◽  
Denture Base ◽  
Base Resin ◽  
Denture Base Resin ◽  
Different Thickness

The Effect of Polymerization Cycles on Color Stability of Microwave-Processed Denture Base Resin

2009 ◽  
Vol 18 (5) ◽  
pp. 432-437 ◽  
Author(s):  
Marília Rodrigues Bonatti ◽  
Tatiana Ramirez Cunha ◽  
Rômulo Rocha Regis ◽  
Cláudia Helena Silva-Lovato ◽  
Helena Freitas Oliveira Paranhos ◽  
...  
Keyword(s):  
Color Stability ◽  
Denture Base ◽  
Base Resin ◽  
Denture Base Resin
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