Evaluation of Transverse and Tensile Bond Strength of Repaired Nylon Denture Base Material by Heat , Cold and Visible Light Cure Acrylic Resin

2013 ◽  
Vol 25 (Speacial Issue 1) ◽  
pp. 1-5 ◽  
Author(s):  
Firas A. F. ◽  
Ghazwan A. A. ◽  
Ali A. M.
Keyword(s):  
Bond Strength ◽  
Visible Light ◽  
Base Material ◽  
Acrylic Resin ◽  
Tensile Bond Strength ◽  
Denture Base

The bond strength of a visible light-cured reline resin to acrylic resin denture base material

1990 ◽  
Vol 63 (4) ◽  
pp. 485-487 ◽  
Author(s):  
Ramin Razavi ◽  
Zafrulla Khan ◽  
J.A. von Fraunhofer
Keyword(s):  
Bond Strength ◽  
Visible Light ◽  
Base Material ◽  
Acrylic Resin ◽  
Denture Base

scholarly journals Effect of Food Simulating Agents on the Hardness and Bond Strength of a Silicone Soft Liner to a Denture Base Acrylic Resin

2015 ◽  
Vol 9 (1) ◽  
pp. 402-408 ◽  
Author(s):  
A.A.R. Khaledi ◽  
M. Bahrani ◽  
S. Shirzadi
Keyword(s):  
Citric Acid ◽  
Bond Strength ◽  
Acrylic Resin ◽  
Tensile Bond Strength ◽  
Control Group ◽  
Denture Base ◽  
Bonding Failure ◽  
Base Resin ◽  
Soft Liner ◽  
Denture Base Resin

Statement of the Problem: Bonding failure between acrylic resin and soft liner material and also gradual loss of soft liner resiliency over time are two impending challenges frequently recognized with a denture base embraced with a resilient liner. Since patients drink various beverages, it is crucial to assess the influences of these beverages on physical characteristics of soft liners. Purpose: This in vitro study envisioned to assess the influence of food simulating agents (FSA) on the hardness of a silicone soft liner by employing a Shore A durometer test and also evaluate its bond strength to a denture base resin by using tensile bond strength test. Materials and Methods: To test the hardness of samples, 50 rectangular samples (40 mm × 10 mm × 3 mm) were prepared from a heat-polymerized polymethyl methacrylate (Meliodent). Mollosil, a commercially available silicone resilient liner, was provided and applied on the specimens following the manufacturer’s directions. In order to test tensile bond strength, 100 cylindrical specimens (30 mm × 10 mm) were fabricated. The liners were added between specimens with the thicknesses of 3 mm. The specimens were divided into 5 groups (n=10) and immersed in distilled water, heptane, citric acid, and 50% ethanol. For each test, we used 10 specimens as a baseline measurement; control group. All specimens were kept in dispersed containers at 37ºC for 12 days and all solutions were changed every day. The hardness was verified using a Shore A durometer and the tensile bond strength was examined by an Instron testing machine at a cross-head speed of 5 mm/min. The records were analyzed employing one-way ANOVA, Tukey’s HSD, and LSD tests. Results: The mean tensile bond strength ± standard deviation (SD) for Mollosil was as follows for each group: 3.1 ± 0.4 (water), 1.8 ± 0.4 (citric acid), 3.0 ± 0.4 (heptane), 1.2 ± 0.3 (50% ethanol), and 3.8 ± 0.4 (control). The hardness values for each group were: 28.7 ± 2.11 (water), 33.2 ± 2.82 (citric acid), 39.2 ± 4.8 (heptane), 32.3 ± 3.56 (50% ethanol) and 22.2 ± 2.08 (control). Mean values for hardness indicated that all of the food simulating agents significantly increased hardness of the Mollosil soft liner compared to the control group (p<0.05). The results of tensile bond strength depicted that water and FSA decreased the bond strength of the soft liner -denture base resin compared to the control group and it was statistically significant (p<0.05). Conclusion: The food simulating agents could influence the mechanical properties of silicone soft liners; hence, clinicians should inform their patients concerning their possible adverse effects and complications.

Comparative Evaluation of Shear Compressive Bond Strength between Cross-linked Acrylic Resin Denture Base and Cross-linked Acrylic Resin Teeth with Different Modifications of Their Ridge Lap Surfaces

2013 ◽  
Vol 14 (5) ◽  
pp. 898-903
Author(s):  
Prasad Rane ◽  
Leena Sadar ◽  
Swaroop Dhume ◽  
Neena Maniar ◽  
Jeevan Prakash Patil ◽  
...  
Keyword(s):  
Bond Strength ◽  
Comparative Evaluation ◽  
Testing Machine ◽  
Base Material ◽  
Slight Modification ◽  
Acrylic Resin ◽  
Denture Base ◽  
Anterior Teeth ◽  
The One ◽  
Artificial Teeth

ABSTRACT A major problem commonly observed in denture wearer is the detachment of artificial tooth/teeth from acrylic denture base. The problem was grave when porcelain teeth used along with the then available denture base materials. The bond formed was purely mechanical and hence debonding of teeth from denture base was a frequent occurrence. Inspite of chemical union between acrylic resin teeth and acrylic denture base material, detachment of teeth particularly anterior teeth is a frequent observation. The objective of the study is to study the effect of change in the surface treatment and surface configuration of ridge lap surface of the teeth on retention of cross-linked acrylic teeth on crosslinked acrylic resin denture base. Sixty specimens were tested for the shear compressive bond strength using instron universal testing machine in KN. Statistical analysis is used. The findings were analyzed using one-way analysis of variance (ANOVA) and ‘t’ test. Slight modification in the ridge lap surface of artificial teeth alters the strength of the shear compressive bond. Sand papering of ridge lap surfaces improves the shear compressive bond then the one without any modification. Maximum shear compressive bond strength can be increased by application of monomer How to cite this article Sadar L, Dhume S, Maniar N, Patil JP, Rane P, Gandhewar M. Comparative Evaluation of Shear Compressive Bond Strength between Cross-linked Acrylic Resin Denture Base and Cross-linked Acrylic Resin Teeth with Different Modifications of Their Ridge Lap Surfaces. J Contemp Dent Pract 2013;14(5):898-903.

scholarly journals Effect of Ozone and Two Common Denture Cleaners on Tensile Bond Strength and Surface Hardness of a Silicone Soft Liner

2020 ◽  
Author(s):  
Mohammadreza Nakhaei ◽  
Amirtaher Mirmortazavi ◽  
Mansooreh Ghanbari ◽  
Zahra Ahmadi
Keyword(s):  
Bond Strength ◽  
Testing Machine ◽  
Surface Hardness ◽  
Base Material ◽  
Hardness Test ◽  
Tensile Bond Strength ◽  
Test Analysis ◽  
Denture Base ◽  
Soft Liner ◽  
The Mean

Objectives: To evaluate the effect of ozone and two common denture cleansers on the surface hardness and bond strength of a silicone-based soft liner to acrylic denture base material. Materials and Methods: Sixty cylindrical specimens were fabricated using heat-cured poly-methyl methacrylate denture base resin. Three millimeters of the material was ground from the midsection and filled with the soft liner. The resilient liner specimens (n=40) used for the hardness test were 10 mm in diameter and 5 mm in height. Cylindrical and disc-shaped samples were randomly divided into four groups (37°C distilled water, Corega® tablets, 0.5% sodium hypochlorite (NaOCl), and a home ozone generator). To simulate six months of denture cleansing clinically, samples were placed in their cleanser once a day for six months according to the manufacturer’s instructions. All cylindrical specimens were placed under tension until failure in a universal testing machine at a crosshead speed of 5 mm/minute. For disc-shaped samples, hardness was measured using a Shore-A durometer. The results were analyzed using Kruskal-Wallis test, analysis of variance (ANOVA), and Tukey's post hoc test. Results: The mean tensile bond strength was not significantly different among the studied groups (P>0.05). The mean hardness in the ozone and Corega tablet groups was significantly lower than that of the control and NaOCl groups (P<0.05). Conclusion: The type of denture cleanser does not affect the tensile bond strength of silicone soft liners. Home ozone generators and cleansing tablets have less effect on the hardness of soft denture liners compared to 0.5% NaOCl.

Comparison of Tensile Bond Strength of Soft Liners to an Acrylic Resin Denture Base with Various Curing Methods and Surface Treatments

2020 ◽  
Vol 33 (1) ◽  
pp. 56-62 ◽  
Author(s):  
Hamidreza Haghi ◽  
Masoud Shiehzadeh ◽  
Jafar Gharechahi ◽  
Davood Nodehi ◽  
Asad Karazhian
Keyword(s):  
Bond Strength ◽  
Acrylic Resin ◽  
Surface Treatments ◽  
Tensile Bond Strength ◽  
Denture Base ◽  
Curing Methods
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