scholarly journals Erratum to: Incorporation of Fluconazole and Ocimum Sanctum Oil in Soft Denture Liners to Treat Biofilms of Candida albicans Associated with Denture Stomatitis

2021 ◽  
Vol 9 (1) ◽  
Author(s):  
Ramandeep Dugal
Keyword(s):  
Surface Roughness ◽  
Physical Properties ◽  
Cell Morphology ◽  
Antifungal Agents ◽  
Inhibitory Concentration ◽  
Surface Hardness ◽  
Ocimum Sanctum ◽  
Denture Stomatitis ◽  
Denture Liners ◽  
Scanning Electron

Purpose: To investigate the In Vitro activity of incorporated antifungal agents like Fluconazole and Ocimum sanctum oil (Tulsi) in the denture soft liners to reduce the risks associated with the biofilms of Candida albicans.Materials and Methods: In the current study, the minimum inhibitory concentration (MIC) of two antifungal agents namely Fluconazole and O. sanctum (Tulsi oil) against C. albicans (ATCC 10231) was evaluated to examine their effect in reducing the count of candida and its biofilms. Analysis of physical properties such as surface roughness and hardness of soft denture liners (test and control) were also performed. The effect of both antifungal agents was also observed on cell morphology of candida cells using scanning electron microscopy (SEM).Results: Studies confirmed MIC value for fluconazole and O. sanctum oil as 600 and 400 µg/ml respectively. Surface hardness and roughness of soft denture material (test) remained unaltered. Finally, SEM studies also proved the effectiveness of incorporated antifungal agents on the cell morphology of C. albicans at their respective MIC values.Conclusions: This approach allows the prolonged drug release in the oral cavity which simultaneously treats the injured denture bearing tissues and also the infection, biofilms of candida without compromising on their physical properties. These studies are significant and have tremendous medicinal and therapeutic relevance.        Keywords: Antifungal Agents; Biofilms; Candida; Scanning Electron Microscope; Soft Liners; Hardness; Surface Roughness; Minimal Inhibitory Concentration; Denture Stomatitis.

scholarly journals Incorporation of Fluconazole and Ocimum Sanctum Oil in Soft Denture Liners to Treat Biofilms of Candida albicans Associated with Denture Stomatitis

2021 ◽  
Vol 9 (1) ◽  
Author(s):  
Aamir Zahid Godil ◽  
Diksha Bhagat ◽  
Parijat Das ◽  
Ashi Ilyas Kazi ◽  
Ramandeep Dugal ◽  
...  
Keyword(s):  
Physical Properties ◽  
Cell Morphology ◽  
Antifungal Agents ◽  
Surface Hardness ◽  
Ocimum Sanctum ◽  
Denture Stomatitis ◽  
Denture Liners ◽  
And Control ◽  
Prolonged Drug Release

Purpose: To investigate the In Vitro activity of incorporated antifungal agents like Fluconazole and Ocimum sanctum oil (Tulsi) in the denture soft liners to reduce the risks associated with the biofilms of Candida albicans.Materials and Methods: In the current study, the minimum inhibitory concentration (MIC) of two antifungal agents namely Fluconazole and O. sanctum (Tulsi oil) against C. albicans (ATCC 10231) was evaluated to examine their effect in reducing the count of candida and its biofilms. Analysis of physical properties such as surface roughness and hardness of soft denture liners (test and control) were also performed. The effect of both antifungal agents was also observed on cell morphology of candida cells using scanning electron microscopy (SEM).Results: Studies confirmed MIC value for fluconazole and O. sanctum oil as 600 and 400 µg/ml respectively. Surface hardness and roughness of soft denture material (test) remained unaltered. Finally, SEM studies also proved the effectiveness of incorporated antifungal agents on the cell morphology of C. albicans at their respective MIC values.Conclusions: This approach allows the prolonged drug release in the oral cavity which simultaneously treats the injured denture bearing tissues and also the infection, biofilms of candida without compromising on their physical properties. These studies are significant and have tremendous medicinal and therapeutic relevance.

Surface Roughness Changes in Denture Liners in Denture Stomatitis Patients

2017 ◽  
Vol 30 (6) ◽  
pp. 561-564 ◽  
Author(s):  
Fernanda Valentini ◽  
Murilo Luz ◽  
Noéli Boscato ◽  
Tatiana Pereira-Cenci
Keyword(s):  
Surface Roughness ◽  
Denture Stomatitis ◽  
Denture Liners

scholarly journals The effects of food simulating liquids on surface roughness, hardness, and solubility of bulk fill composites

2019 ◽  
Author(s):  
Özge Gizem Cabadağ ◽  
NİHAN GÖNÜLOL
Keyword(s):  
Surface Roughness ◽  
Citric Acid ◽  
Vickers Microhardness ◽  
Surface Hardness ◽  
High Viscosity ◽  
Constant Mass ◽  
Measuring Device ◽  
Hardness Values ◽  
Roughness Measurements ◽  
Scanning Electron

Abstract BackgroundThe aim of this study was to compare the effects of food simulating liquids (FSLs) on the surface roughness, surface hardness and solubility of bulk fill composites. MethodsTwo-hundred samples were prepared from four high viscosity bulk fill composites (SonicFillTM, Tetric® EvoCeram Bulk Fill, Beautifil-Bulk Restorative, FiltekTM Bulk Fill Posterior Restorative) and a microhybrid composite (FiltekTM Z250). After the initial weights of the samples were recorded (m1), surface roughness measurements were evaluated with a profilometer. The samples were stored in 4 different FSLs for 7 days, then the second surface roughness values were recorded. Then the samples were stored in a desiccator to reach the constant mass and the values were recorded as m2. The solubility levels were calculated according to the ISO 4049: 2009 specification. The surface hardness values of the samples were determined by using the Vickers microhardness measuring device. Twenty specimens from each group were evaluated in terms of surface morphology with scanning electron microscope (SEM).ResultsBeautifil Bulk Restorative was the most affected group in terms of surface roughness after storage in FSLs and citric acid caused the highest values in this group (p<0,005). Beautifil Bulk Restorative and Filtek Z250 groups showed the highest surface hardness values, while the Tetric EvoCeram group had the lowest. The highest solubility values were detected in Beautifil Bulk Restorative group, and citric acid and ethanol caused the highest solubility values on all the tested composites. ConclusionsBeautifil Bulk Restorative group showed significant differences from the other groups in all tested parameters.

Ultrasonic Cavitation Peening of Stainless Steel and Nickel Alloy

2013 ◽  
Author(s):  
Yibo Gao ◽  
Benxin Wu ◽  
Ze Liu ◽  
Yun Zhou
Keyword(s):  
Surface Roughness ◽  
Stainless Steel ◽  
Nickel Alloy ◽  
Vibration Amplitude ◽  
Surface Hardness ◽  
Ultrasonic Cavitation ◽  
Workpiece Surface ◽  
Oxygen Contamination ◽  
Scanning Electron

Ultrasonic cavitation peening is a peening process utilizing the high pressure induced by ultrasonic cavitation in liquids (typically water). However, the relevant previous investigations in the literature have been limited. In this paper, ultrasonic cavitation peening on stainless steel and nickel alloy has been studied, including the observation or characterization of the surface hardness, morphology, profile, roughness and oxygen contamination of treated workpiece samples. It has been found that for the studied situations, ultrasonic cavitation peening (at a sufficiently high horn vibration amplitude) can obviously enhance the workpiece surface hardness without significantly increasing the surface roughness, changing surface morphology observed by scanning electron microscope (SEM), or contaminating the surface by oxygen.

scholarly journals Mechanical and Surface Properties of Resilient Denture Liners Modified with Chitosan Salts

Materials ◽  
2019 ◽  
Vol 12 (21) ◽  
pp. 3518
Author(s):  
Maike Herla ◽  
Klaus Boening ◽  
Heike Meissner ◽  
Katarzyna Walczak
Keyword(s):  
Mechanical Properties ◽  
Surface Roughness ◽  
Statistical Analysis ◽  
Surface Properties ◽  
Control Group ◽  
Distilled Water ◽  
Denture Stomatitis ◽  
Antifungal Properties ◽  
Denture Liners ◽  
Antibacterial And Antifungal

Chitosan (CS) and its derivatives show antibacterial and antifungal properties and could help treat and prevent denture stomatitis (DS). Mechanical and surface properties of resilient denture liners were evaluated when modified with CS salts. CS-hydrochloride (CS-HCl) and CS-glutamate (CS-G) were added to resilient denture liners Ufi Gel P and Coe-Soft at four different concentrations (0.1%, 0.2%, 0.4%, 1% w/w) from which specimens were produced, as well as a control group of each material with no added CS salt. Ten specimens per group (Ø 35 mm, height 6 mm) were manufactured. They were stored in distilled water at 37 °C for a total of 30 days (d). Shore A hardness (SHA) and surface roughness (Ra) were evaluated after 24 h (T1), 7 d (T2), 14 d (T3) and 30 d (T4). Kruskal–Wallis and U-test (Bonferroni-Holm adjusted) were used for statistical analysis (p ≤ 0.05). Ra increased significantly once CS salts were added. SHA increased significantly for some groups, but all specimens fulfilled requirements set by ISO 10139-2:2016. Modification with CS salts does not influence the mechanical properties of the modified resilient denture liners in a clinically relevant manner. Despite the increased roughness, the concept is suitable for further studies. Especially antimicrobial/antibiofilm studies are needed.

The Effects of Food-Simulating Liquids on Surface Roughness, Surface Hardness, and Solubility of Bulk-Fill Composites

2021 ◽  
pp. 232020682098845
Author(s):  
Özge Gizem Cabadag˘ ◽  
Nihan Gönülol
Keyword(s):  
Surface Roughness ◽  
Citric Acid ◽  
Vickers Microhardness ◽  
Surface Hardness ◽  
Glass Ionomer ◽  
Constant Mass ◽  
Roughness Surface ◽  
Hardness Values ◽  
Roughness Measurements ◽  
Scanning Electron

Aim: To investigate the surface roughness, surface hardness, and solubility of bulk-fill composites after exposure to food-simulating liquids (FSLs). Materials and Methods: A total of 200 disc-shaped samples (8 mm diameter × 4 mm depth) were prepared using four bulk-fill composites (SonicFillTM, Tetric® EvoCeram Bulk Fill, Beautifil-Bulk Restorative, FiltekTM Bulk Fill Posterior Restorative) and a microhybrid composite (FiltekTM Z250) ( n = 40). Following the measurement of initial weights of the samples ( m1), the surface roughness measurements were gauged using a contact-profilometer. The samples were stored in four different FSLs for 7 days, and then the second surface roughness values were recorded. The samples were stored in a desiccator to reach the constant mass and the values were recorded as m2, then the solubility levels were calculated. The Vickers microhardness values of the samples were determined. A total of 20 specimens were evaluated in terms of surface morphology with a scanning electron microscope (SEM). Data were statistically analyzed with the two-way ANOVA and Bonferroni tests ( P < .05). Results: Beautifil-Bulk Restorative was affected at most in terms of surface roughness after storage in FSLs and citric acid caused the highest values in this group ( P < .005). Beautifil-Bulk Restorative and Filtek Z250 showed the highest surface hardness values, while the Tetric EvoCeram group had the lowest. The highest solubility values were found in Beautifil-Bulk Restorative, and citric acid and ethanol yielded the highest solubility values for all of the composites. Conclusion: Beautifil-Bulk Restorative is the most affected group in all parameters evaluated and also affected overly by citric acid among the FSLs in consequence of its prereacted glass ionomer fillers.

scholarly journals Effect of cleansers on denture base resins’ structural properties

2019 ◽  
Vol 17 (1) ◽  
pp. 228080001982779 ◽  
Author(s):  
Ozgun Yusuf Ozyilmaz ◽  
Ceyda Akin
Keyword(s):  
Electron Microscopy ◽  
Surface Roughness ◽  
Surface Hardness ◽  
P Value ◽  
Distilled Water ◽  
Denture Base ◽  
Chemical Solutions ◽  
Denture Cleansers ◽  
Hardness Values ◽  
Scanning Electron

Introduction: We assessed the effect of different available denture cleansers on the roughness and hardness of polyetherketoneketone, thermoinjection-molded polyamide, and polymethylmethacrylate. Materials and Methods: A total of 150 disc-shaped specimens were fabricated (10 mm × 2 mm) from these three denture base resins, and divided into five subgroups ( n = 10) according to immersion procedures. One of these groups subjected to distilled water served as control, whereas other groups were subjected to daily cleansing with four denture cleansers (Corega, Protefix, Curaprox, and Perlodent) for 8 h a day for 140 days. The surface roughness and hardness values of specimens were recorded by measuring twice at baseline, and again after application of chemical solutions. Topography alterations after treatments were assessed with scanning electron microscopy. The data were subjected to statistical analysis and comparison among groups was done using Kruskal Wallis and Wilcoxon Signed Ranks tests. P-value <0.05 was considered significant. Results: The surface roughness of polyetherketoneketone, polymethylmethacrylate, and polyamide dentures was increased significantly by chemical solutions of denture cleansers. While the hardness value of polyetherketoneketone was not affected significantly after immersion in denture cleansers, those of polymethylmethacrylate and polyamide decreased significantly. Compared with Curaprox, the effervescent tablets significantly altered the surface hardness and roughness of polyamide. Conclusion: Denture cleansers can considerably alter the surface roughness and hardness of denture base resins and should be used carefully depending on the material.

scholarly journals The effects of food simulating liquids on surface roughness, hardness, and solubility of bulk fill composites

2019 ◽  
Author(s):  
Özge Gizem Cabadağ ◽  
NİHAN GÖNÜLOL
Keyword(s):  
Surface Roughness ◽  
Citric Acid ◽  
Vickers Microhardness ◽  
Surface Hardness ◽  
High Viscosity ◽  
Constant Mass ◽  
Measuring Device ◽  
Hardness Values ◽  
Roughness Measurements ◽  
Scanning Electron

Abstract Abstract Background: The aim of this study was to compare the effects of food simulating liquids (FSLs) on the surface roughness, surface hardness and solubility of bulk fill composites. Methods: Two-hundred samples were prepared from four high viscosity bulk fill composites (SonicFill TM , Tetric® EvoCeram Bulk Fill, Beautifil-Bulk Restorative, Filtek TM Bulk Fill Posterior Restorative) and a microhybrid composite (Filtek TM Z250). After the initial weights of the samples were recorded (m 1 ), surface roughness measurements were evaluated with a profilometer. The samples were stored in 4 different FSLs for 7 days, then the second surface roughness values were recorded. Then the samples were stored in a desiccator to reach the constant mass and the values were recorded as m 2 . The solubility levels were calculated according to the ISO 4049: 2009 specification. The surface hardness values of the samples were determined by using the Vickers microhardness measuring device. Twenty specimens from each group were evaluated in terms of surface morphology with scanning electron microscope (SEM). Results: Beautifil Bulk Restorative was the most affected group in terms of surface roughness after storage in FSLs and citric acid caused the highest values in this group (p<0,005). Beautifil Bulk Restorative and Filtek Z250 groups showed the highest surface hardness values, while the Tetric EvoCeram group had the lowest. The highest solubility values were detected in Beautifil Bulk Restorative group, and citric acid and ethanol caused the highest solubility values on all the tested composites. Conclusions: Beautifil Bulk Restorative group showed the highest surface roughness and solubility values among the tested groups, while the same group showed the highest surface hardness. Key Words: Bulk fill composites, food simulating liquids, solubility, surface hardness, surface roughness.

DILLIDUR 450V

Alloy Digest ◽  
2011 ◽  
Vol 60 (12) ◽  
Keyword(s):  
Fracture Toughness ◽  
Wear Resistance ◽  
Physical Properties ◽  
Tensile Properties ◽  
Room Temperature ◽  
Surface Hardness ◽  
Heat Treating ◽  
Hot Working ◽  
Resistant Steel ◽  
Bend Strength

Abstract Dillidur 450V is a water hardened wear-resistant steel with surface hardness at room temperature of 420-480 HB. The steel is easy to weld and bend. Hot working is not recommended. This datasheet provides information on composition, physical properties, hardness, tensile properties, and bend strength as well as fracture toughness. It also includes information on wear resistance as well as forming, heat treating, machining, and joining. Filing Code: SA-638. Producer or source: Dillinger Hütte GTS.

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