Effect of a Surface Sealant Agent on the Color Stability and Surface Roughness of Polymethyl Methacrylate and Nylon Denture Base Materials

2021 ◽  
pp. 70-78
Author(s):  
Rashin Giti ◽  
Razieh Kazemi ◽  
Farhad Mohammadi
Keyword(s):  
Surface Roughness ◽  
Polymethyl Methacrylate ◽  
Color Stability ◽  
Denture Base ◽  
Base Materials ◽  
Surface Sealant

Effect of surface sealant agents on the surface roughness and color stability of denture base materials

2016 ◽  
Vol 116 (4) ◽  
pp. 610-616 ◽  
Author(s):  
Onur Sahin ◽  
Aysegül Koroglu ◽  
Doğu Ömür Dede ◽  
Burak Yilmaz
Keyword(s):  
Surface Roughness ◽  
Color Stability ◽  
Denture Base ◽  
Base Materials ◽  
Surface Sealant ◽  
Effect Of Surface

scholarly journals A Color Stability Comparison of Conventional and CAD/CAM Polymethyl Methacrylate Denture Base Materials

2019 ◽  
Vol 53 (2) ◽  
pp. 158-167 ◽  
Author(s):  
Cagatay Dayan ◽  
Melahat Celik Guven ◽  
Burc Gencel ◽  
Canan Bural
Keyword(s):  
Polymethyl Methacrylate ◽  
Color Stability ◽  
Denture Base ◽  
Base Materials ◽  
Cad Cam

scholarly journals Enhancement of the Tensile and the Compression Properties for Heat- Cured Acrylic Resin Denture Base Materials

2018 ◽  
Vol 15 (4) ◽  
pp. 449-454
Author(s):  
Baghdad Science Journal
Keyword(s):  
Polymethyl Methacrylate ◽  
Compression Strength ◽  
Base Material ◽  
Acrylic Resin ◽  
Tensile Tests ◽  
Strength Test ◽  
Denture Base ◽  
Compression Properties ◽  
Base Materials ◽  
Styrene Butadiene

This work aims to investigate the tensile and compression strengths of heat- cured acrylic resin denture base material by adding styrene-butadiene (S- B) to polymethyl methacrylate (PMMA). The most well- known issue in prosthodontic practice is fracture of a denture base. All samples were a blend of (90%, 80%) PMMA and (10%, 20%) S- B powder melted in Oxolane (Tetra hydro furan). These samples were chopped down into specimens of dimensions 100x10x2.5mm to carry out the requirements of tensile tests. The compression strength test specimens were shaped into a cylinder with dimensions of 12.7mm in diameter and 20mm in length. The experimental results show a significant increase in both tensile and compression strengths when compared to control (standard) results for the preparation material.

scholarly journals Surface Characteristics of Milled and 3D Printed Denture Base Materials Following Polishing and Coating: An In-Vitro Study

Materials ◽  
2020 ◽  
Vol 13 (15) ◽  
pp. 3305
Author(s):  
Pablo Kraemer Fernandez ◽  
Alexey Unkovskiy ◽  
Viola Benkendorff ◽  
Andrea Klink ◽  
Sebastian Spintzyk
Keyword(s):  
Surface Roughness ◽  
3D Printing ◽  
In Vitro Study ◽  
Surface Characteristics ◽  
Denture Base ◽  
Liquid Resin ◽  
Base Materials ◽  
Superior Surface ◽  
3D Printed

(1) Background: To date, no information on the polishability of milled and 3D-printed complete denture bases has been provided, which is relevant in terms of plaque accumulation. (2) Methods: three groups (n = 30) were manufactured using the cold-polymerization polymethilmethacrilate, milling (SM) and 3D printing (AM). 10 specimens of each group were left untreated (reference). 10 more specimens were pre-polished (intermediate polishing) and 10 final specimens were highgloss polished. An additional 20 specimens were 3D printed and coated with the liquid resin (coated), 10 of which were additionally polished (coated + polished). For each group Ra and Rz values, gloss value and REM images were obtained. (3). The “highgloss-polished” specimens showed statistically lower Ra and Rz values in the SM, followed by AM and conventional groups. In the AM group statistically lower surfaces roughness was revealed for highgloss-polished, “coated + polished”, and “coated” specimens, respectively. (4) Conclusions: The milled specimens demonstrated superiors surface characteristics than 3D printed and conventionally produced after polishing. The polished specimens demonstrated superior surface characteristics over coated specimens. However, the surface roughness by both polished and coated specimens was within the clinically relevant threshold of 0.2 µm.

Surface Adherence of Candida albicans to Different Polymethyl Methacrylate Resin Denture Base Materials

2011 ◽  
Vol 2 (3) ◽  
pp. 237-242
Author(s):  
Achut R Devarhubli ◽  
VK Subbarao ◽  
NP Patil
Keyword(s):  
Candida Albicans ◽  
Polymethyl Methacrylate ◽  
Cobalt Alloy ◽  
Denture Base ◽  
Denture Stomatitis ◽  
Base Materials ◽  
Normal Individuals ◽  
Cobalt Chrome Alloy ◽  
Cobalt Chrome

ABSTRACT Over the years researchers have reported on the frequency and distribution of yeast in the oropharynx of apparently normal individuals and those with systemic or mycotic diseases wearing dentures. Few workers have taken into consideration the role played by the legion of denture base materials on the occurrence and progression of denture stomatitis. Hence this study was undertaken with the objective of evaluating the in vitro adherence of Candida albicans to different denture base materials namely reinforced polymethyl methacrylate, Nonreinforced polymethyl methacrylate and Cobalt chrome alloy of which chrome cobalt alloy showed less adherence to candidal cells compared to the two polymethyl methacrylate resins.

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 Comparison of Hardness and Surface Roughness of Two Denture bases Polymerized by Different Methods

2012 ◽  
Vol 3 (2) ◽  
pp. 171-175 ◽  
Author(s):  
Farideh Bahrani ◽  
Mahroo Vojdani ◽  
Anahita Safari ◽  
Ghasem Karampoor
Keyword(s):  
Mechanical Property ◽  
Surface Roughness ◽  
Injection Molding ◽  
Vickers Hardness ◽  
T Test ◽  
Hardness Testing ◽  
Denture Base ◽  
Hardness Tester ◽  
Base Materials ◽  
Acrylic Resins

ABSTRACT Purpose The aim of this study was to evaluate mechanical property hardness and surface roughness (Ra) of different polymerization acrylic resins used for denture bases. Materials and methods A total of 30 specimens were prepared and divided in two groups. A total of 15 samples were processed by the compression molding technique using Meliodent (heatcured). Another 15 samples were processed with cold-cured resin Futura Gen via the injection molding technique. Hardness testing was conducted using a Vickers hardness tester. The Ra test was performed by a profilometer. Data were analyzed using the independent sample t-test and differences were statistically significant at the 0.05 level. Results The Vickers hardness numbers (VHN) were 20.8 ± 2.39 for Meliodent and 21.18 ± 1.42 for FuturaGen, which was not significantly different (p > 0.05). The Ra of Meliodent was 0.92 ± 0.23 µm and for FuturaGen it was 0.84 ± 0.37 µm. There were no significant changes in roughness. Conclusion The hardness and Ra of Meliodent and FuturaGen were not significantly different. Therefore, we recommend the use of FuturaGen for manufacturing denture base materials. How to cite this article Bahrani F, Safari A, Vojdani M, Karampoor G. Comparison of Hardness and Surface Roughness of Two Denture bases Polymerized by Different Methods. World J Dent 2012;3(2):171-175.

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