Evaluation of changes in adhesive strength and cytotoxicity of a denture adhesive according to time

2009 ◽  
Vol 47 (2) ◽  
pp. 232
Author(s):  
Ha-Yoon Jung ◽  
Jee-Hwan Kim ◽  
Keun-Woo Lee ◽  
June-Sung Shim ◽  
Hong-Seok Moon
Keyword(s):  
Adhesive Strength ◽  
Denture Adhesive

scholarly journals Effects of herbal medicine components on the physical properties of trial denture adhesives

2017 ◽  
Vol 50 (4) ◽  
pp. 171
Author(s):  
Kenichiro Nakai ◽  
Takeshi Maeda ◽  
Guang Hong ◽  
Tadafumi Kurogi ◽  
Joji Okazaki
Keyword(s):  
Herbal Medicine ◽  
Physical Properties ◽  
Adhesive Strength ◽  
Liquid Paraffin ◽  
Oral Disease ◽  
Denture Adhesive ◽  
Base Materials ◽  
Denture Adhesives ◽  
Level Of Significance ◽  
Initial Viscosity

Background: Denture adhesive is widely used in elderly people who wear complete dentures. Chinese herbal medicine has long been used for the treatment of oral disease. The addition of herbal medicine to denture adhesive might be used to develop an adhesive which is effective for xerostomia patients. Purpose: The purpose of this study was to evaluate physical properties and cytototoxicity of herbal medicine components in denture adhesive. Methods: This study used a combination of 35wt% PVM-MA, 20wt% CMC, 40wt% white petrolatum and 5wt% liquid paraffin as base materials. Three kinds of herbal medicine components: Maimendong (Ophiopogon), Fuling (Hoelen) and Dongkuizi (Cluster mallow seed) were added to base materials of 1wt%, 5wt% and 10wt%. The initial viscosity was measured using a controlled-stress rheometer (AR-G2). The adhesive strength was quantified according to ISO-10873 recommended procedures. All data was analyzed independently by one-way Anova combined with a Turkey’s multiple comparison test at a 5% level of significance. Results: Significant differences were observed between materials in initial viscosity (p < 0.05). Specifically, samples containing 5wt% and 10wt% of Maimendong (Ophiopogon) showed higher values compared with the control samples. The larger the amounts of herbal medicine components, the greater the changes in the adhesive strength of denture adhesives over time. The denture adhesives containing herbal medicine components do not have a cytotoxic effect and are safe for use in actual clinical practice. Conclusion: The study showed that the addition of herbal medicine components does not affect physical properties (i.e. initial viscosity and adhesive strength) of denture adhesive and cytotoxicity in fibroblast cells.

scholarly journals A new method for evaluating the retentive efficacy of different denture adhesives

2018 ◽  
Vol 17 ◽  
pp. e181357
Author(s):  
Simone Gomes Dias de Oliveira ◽  
Carlos Enrique Cuevas-Suárez ◽  
Carine Tais Welter Meereis ◽  
Josiane Kuhn Rutz ◽  
Ricardo Alfredo Carrillo-Cotto ◽  
...  
Keyword(s):  
Bond Strength ◽  
Adhesive Strength ◽  
Linear Regression Analysis ◽  
Testing Machine ◽  
New Method ◽  
Tensile Bond Strength ◽  
Adhesive Tape ◽  
Denture Adhesive ◽  
Test Conditions ◽  
Denture Adhesives

Aim: The aim of this study was to evaluate a new method for measuring the retention values of different denture adhesives. Methods: The adhesive strength values of three different commercial denture adhesives (Corega powder, Corega adhesive tape and Ultra Corega cream) were evaluated using three different moisturizing agents (distilled water, artificial saliva and natural saliva). The adhesive test was performed on a universal testing machine, after applying the adhesive products to acrylic resin specimens, under two different test conditions (wetting or dipping). Tensile bond strength values in MPa were obtained for each denture adhesive presentation and test condition. Viscosity of the denture adhesives mixed with the different moisturizing agents was determined using a rotary rheometer. Maximum viscosity values were analyzed using the one-way ANOVA test. Tensile bond strength data was analyzed using Kruskal-Wallis and the Tukey’s test. Pooled data of each denture adhesive presentations for all test conditions was also carried out. Correlation between viscosity and pooled tensile strength values was analyzed through linear regression analysis. A significance level of α=0.05 was set for all analyses. Results: Results showed that statistically higher adhesion strength was obtained with tape and cream adhesives when using natural saliva as moisturizing agents (p<0.05). The adhesive strength values obtained with the dipping method were similar to those obtained with the conventional wetting method. The denture retention strength was influenced by both the denture adhesive type and moisturizing agent used. Conclusion: The dipping method showed to be a reliable test capable to simulate the oral conditions and should be better explored in further studies.

Adhesive Strength of Cobalt-Alloy Coatings Applied by Laser Surfacing on Structural-Steel Substrates

2020 ◽  
Vol 40 (10) ◽  
pp. 882-884
Author(s):  
A. V. Shafranov ◽  
E. A. Morozov ◽  
K. R. Muratov ◽  
A. A. Drozdov ◽  
A. N. Yurchenko
Keyword(s):  
Structural Steel ◽  
Adhesive Strength ◽  
Cobalt Alloy ◽  
Laser Surfacing ◽  
Steel Substrates

Corrosion-resistant composite germanium-based alloys coatings

2019 ◽  
pp. 103-109
Author(s):  
A. F. Vasiliev ◽  
E. A. Samodelkin ◽  
E. Yu. Geraschenkova ◽  
B. V. Farmakovsky
Keyword(s):  
Thermal Cycling ◽  
Adhesive Strength ◽  
Corrosion Resistant ◽  
Temperature Range ◽  
Powder Composition ◽  
High Adhesive Strength

The results of complex studies on the development of a powder composition Ge–Cr–Zr–Ce–WC, promising for the production of functional cold-resistant coatings by microplasma sputtering, are presented. The coating has high adhesive strength (more than 40 MPa) and microhardness (up to 10–12 GPa) and withstands repeated thermal cycling in the temperature range from –60 to 20°С.

Adhesive Strength of Ni–Cu Surface Alloy Formation by Low-Energy High-Current Electron Beam

2021 ◽  
Vol 63 (10) ◽  
pp. 1804-1809
Author(s):  
E. V. Yakovlev ◽  
A. B. Markov ◽  
D. A. Shepel ◽  
V. I. Petrov ◽  
A. A. Neiman
Keyword(s):  
Electron Beam ◽  
Adhesive Strength ◽  
Low Energy ◽  
Surface Alloy ◽  
Alloy Formation ◽  
High Current ◽  
High Current Electron Beam ◽  
Current Electron ◽  
High Current Electron

scholarly journals Effect of the Process Parameters on the Adhesive Strength of Dissimilar Polymers Obtained by Multicomponent Injection Molding

Polymers ◽  
2021 ◽  
Vol 13 (7) ◽  
pp. 1039 ◽  
Author(s):  
Luciano Pisanu ◽  
Leonardo Costa Santiago ◽  
Josiane Dantas Viana Barbosa ◽  
Valter Estevão Beal ◽  
Marcio Luis Ferreira Nascimento
Keyword(s):  
Adhesive Strength ◽  
Natural Fiber ◽  
Fiber Composite ◽  
Pure Shear ◽  
Central Area ◽  
Dissimilar Materials ◽  
Type I ◽  
Coconut Fiber ◽  
Adhesive Properties ◽  
Experimental Conditions

The growing demand in the consumer market for products with sustainable technologies has motivated new applications using overmolded natural fiber composites. Therefore, studies have been conducted mainly to understand the adhesive properties of overmolded parts. In the present study, a polypropylene (PP) composite with 30% coconut fibers without additives was developed with the aid of a corotating twin screw extruder. Subsequently, a multicomponent injection mold was developed based on the geometry of the ISO 527 type I specimen, in which samples overmolded with PP and PP–coconut-fiber composite, with the overlap in the central area, were obtained to evaluate the adhesive strength of dissimilar materials. The objective of this study was to evaluate the bond between PP and PP–coconut-fiber composite under different processing conditions using an adhesive strength testing device to perform a pure shear analysis. The experimental conditions followed a statistical design considering four factors in two levels and a significance level of 5%. The results indicated that adhesive strength increased significantly as the overlap area increased. It was observed that temperature and injection flow rate were the factors that most contributed to strengthening the bonds of dissimilar materials.

scholarly journals A randomised bite force study assessing two currently marketed denture adhesive products compared with no‐adhesive control

2019 ◽  
Vol 5 (3) ◽  
pp. 276-283 ◽  
Author(s):  
Roshan Varghese ◽  
Gary R. Burnett ◽  
Audrey Souverain ◽  
Avinash Patil ◽  
Ana G. Gossweiler
Keyword(s):  
Bite Force ◽  
Denture Adhesive
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