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

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The Effect of Surface Treatments on Tensile Bond Strength between a Silicone Soft Liner and a Heat-Cured Denture Base Resin

The Journal of Adhesion ◽

10.1080/00218464.2011.601241 ◽

2011 ◽

Vol 87 (9) ◽

pp. 951-965

Author(s):

Koray Soygun ◽

Giray Bolayir ◽

Arife Dogan ◽

Hakan Demir ◽

Orhan Murat Dogan ◽

...

Keyword(s):

Bond Strength ◽

Surface Treatments ◽

Tensile Bond Strength ◽

Denture Base ◽

Base Resin ◽

Soft Liner ◽

Denture Base Resin ◽

Effect Of Surface

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Tensile Bond Strength of Soft Liner to denture Base Resin Processed by two Commonly used Processing Techniques

International Journal of Scientific Research in Science and Technology ◽

10.32628/ijsrst196243 ◽

2019 ◽

pp. 267-270

Author(s):

Peta Harish ◽

T. Pavan Kumar ◽

A. Avinash

Keyword(s):

Bond Strength ◽

Strength Test ◽

Tensile Bond Strength ◽

Denture Base ◽

Heat Cure ◽

Base Resin ◽

Soft Liner ◽

Processing Techniques ◽

Denture Base Resin

This study evaluated the effect of two commonly used methods of processing permanent soft liner on tensile bond strength between denture base and soft liner. Silicone based soft liner was used in this study. Ten heat cure dumbbell shaped specimens along with soft liner were processed together. Another ten heat cure dumbbell shaped specimens were fabricated and later relined with soft liner. All the specimens were subjected to tensile bond strength test. Specimens relined directly with soft liner at the time of processing the denture base resin showed significantly higher bond strength.

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The Effect of Sandblasting on Bond Strength of Soft Liners to Denture Base Resins: A Systematic Review and Meta-Analysis of In Vitro Studies

International Journal of Dentistry ◽

10.1155/2021/5674155 ◽

2021 ◽

Vol 2021 ◽

pp. 1-17

Author(s):

Fahimeh Hamedirad ◽

Marzieh Alikhasi ◽

Mahya Hasanzade

Keyword(s):

Bond Strength ◽

Meta Analysis ◽

In Vitro Studies ◽

Control Group ◽

Denture Base ◽

Base Resin ◽

Soft Liner ◽

Meta Analyses ◽

Denture Base Resin

Objectives. This study aimed to evaluate the effect of sandblasting on the bond strength of denture base resin to soft liners. Materials and Methods. This report follows the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) statement. PubMed, Embase, Cochrane, Scopus, and OpenGrey databases were searched for in vitro studies that compared sandblasting with no treatment in terms of the tensile, shear, and peel bond strength of resilient lining materials (acrylic-based or silicone-based) to polymethyl methacrylate denture base resin. Based on the outcome, the analysis was carried out in three groups of tensile, shear, and peel bond strength. Subgroup analysis was done for the effect of size of particles on sandblasting, blasting pressure, and type of soft liner whenever possible. Heterogeneity was evaluated among the studies, and meta-analysis was performed with random effect models ( p < .05 ). Results. After screening, 16 articles met the inclusion criteria for meta-analyses. No treatment showed significantly higher tensile ( p < 0.001 ) or peel ( p = 0.04 ) bond strength, although shear bond strength of sandblasted resin was significantly better ( p = 0.008 ). Results of subgroup analyses of particle size favored the control group in 50 µ Al2O3 particle size ( p < 0.001 ). In analyses of blasting pressure, the control group had significantly better tensile bond strength than specimens with blasting pressure ≤1 bar ( p < 0.001 ) while specimens with blasting pressure beyond 1 bar showed significantly more tensile strength than control group ( p = 0.03 ). In silicon-based liners, groups without any surface treatment had significantly higher tensile bond strength ( p < 0.001 ). Conclusion. According to the in vitro studies, sandblasting would not lead to significant increase in bond strength of soft liner to the denture base resin.

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Effect of Different Surface Treatments and Thermocycling on Bond Strength of a Silicone-based Denture Liner to a Denture Base Resin

The Journal of Contemporary Dental Practice ◽

10.5005/jp-journals-10024-1819 ◽

2016 ◽

Vol 17 (2) ◽

pp. 154-159 ◽

Cited By ~ 2

Author(s):

Farzaneh Ahrari ◽

Mohammadreza Nakhaei ◽

Hossein Dashti ◽

Samaneh Vasigh ◽

Shazia Mushtaq ◽

...

Keyword(s):

Tensile Strength ◽

Bond Strength ◽

Testing Machine ◽

Acrylic Resin ◽

Surface Treatments ◽

Control Group ◽

Air Abrasion ◽

Denture Base ◽

Base Resin ◽

Denture Base Resin

ABSTRACT Aim The aim of this study is to evaluate the effects of three different surface treatments and thermocycling on the tensile strength of a silicone lining material to denture resin. Materials and methods A total of 96 cube-shaped specimens were fabricated using heat-cured polymethyl methacrylate (PMMA) denture base resin. Three millimeters of the material was cut from the midsection. The specimens were divided into four groups. The bonding surfaces of the specimens in each group received one of the following surface treatments: no surface treatment (control group), airborne particle abrasion with 110 μm alumina particles (air abrasion group), Er:yttrium aluminum garnet laser irradiation (laser group), and air abrasion + laser. After the lining materials were processed between the two PMMA blocks, each group was divided into two subgroups (n = 12), either stored in distilled water at 37°C for 24 hours or thermocycled between 5 and 55°C for 5,000 cycles. The specimens were tested in tensile and shear strength in a universal testing machine. Data were analyzed with two-way analysis of variance and Tamhane's post hoc tests (α = 0.05). The mode of failure was determined, and one specimen in each group was examined by scanning electron microscopy. Results Surface-treated groups demonstrated significantly higher tensile strengths compared to the control group (p < 0.001). Nonetheless, no significant differences were found between surface-treated groups (p > 0.05). The tensile strength was significantly different between thermocycled and waterstored specimens (p = 0.021). Conclusion Altering the surface of the acrylic denture base resin with air abrasion, laser, and air abrasion + laser increased the tensile strength. Thermocycling resulted in decrease in bond strength of silicone-based liner to surface-treated acrylic resin. Clinical significance Pretreatment of denture base resins before applying the soft liner materials improves the bond strength. However, thermocycling results in decrease in bond strength of soft denture liner to surface-treated acrylic resin. How to cite this article Nakhaei M, Dashti H, Ahrari F, Vasigh S, Mushtaq S, Shetty RM. Effect of Different Surface Treatments and Thermocycling on Bond Strength of a Silicone-based Denture Liner to a Denture Base Resin. J Contemp Dent Pract 2016;17(2):154-159.

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Effect of Incorporation of Silver Nanoparticles on the Tensile Bond Strength of a Long term Soft Denture Liner

European Journal of Dentistry ◽

10.1055/s-0040-1709923 ◽

2020 ◽

Vol 14 (02) ◽

pp. 268-273

Author(s):

Sareh Habibzadeh ◽

Arman Omidvaran ◽

Solmauz Eskandarion ◽

Ahmad Reza Shamshiri

Keyword(s):

Silver Nanoparticles ◽

Bond Strength ◽

Testing Machine ◽

Acrylic Resin ◽

Analysis Data ◽

Tensile Bond Strength ◽

Denture Base ◽

Heat Cure ◽

Base Resin ◽

Soft Liner

Abstract Objectives This study aimed at assessing the effect of the addition of silver nanoparticles (SNPs) to a silicone soft liner on its tensile bond strength to denture base resin. Materials and Methods SNPs were added to Mucopren cold cure soft liner in 0 (control), 0.5, 1, 2, and 3 wt% concentrations and bonded in 120 stainless steel molds with processed heat cure acrylic resin blocks. Liner/resin combination samples were divided into two groups. The first half was stored for 2 days in distilled water at 37°C and then subjected to tensile bond strength, while the other half were thermocycled 3000 times before testing. Mean bond strength, expressed in mega pascals (MPa), was determined in the tensile test with the use of a universal testing machine at a crosshead speed of 5 mm/min. Statistical Analysis Data were analyzed using SPSS via one-way analysis of variance test, t-test, and Tukey’s posthoc, at a 95% confidence level (p < 0.05). Results Addition of SNPs and thermocycling both caused a significant reduction in the tensile bond strength of Mucopren to acrylic resin; however, in the thermocycled group, the bond strength increased with the increase in the concentration of SNPs (p < 0.001). Conclusion Addition of SNPs to Mucopren soft silicone liner reduces its tensile bond strength to denture acrylic resin.

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Effect of immersion cleansers on the bond strength between a denture base resin and acrylic resin teeth

International Journal of Adhesion and Adhesives ◽

10.1016/j.ijadhadh.2013.02.011 ◽

2013 ◽

Vol 44 ◽

pp. 180-183 ◽

Cited By ~ 5

Author(s):

Ana Carolina Pero ◽

Priscila Mattos Scavassin ◽

Andressa Rosa Perin Leite ◽

Danny Omar Mendoza Marin ◽

André Gustavo Paleari ◽

...

Keyword(s):

Bond Strength ◽

Acrylic Resin ◽

Denture Base ◽

Base Resin ◽

Denture Base Resin

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Relationship between Plasticizer Content and Tensile Bond Strength of Soft Denture Liners to a Denture Base Resin

Dental Materials Journal ◽

10.4012/dmj.23.94 ◽

2004 ◽

Vol 23 (2) ◽

pp. 94-99 ◽

Cited By ~ 11

Author(s):

Guang HONG ◽

Hiroshi MURATA ◽

Taizo HAMADA

Keyword(s):

Bond Strength ◽

Tensile Bond Strength ◽

Denture Base ◽

Plasticizer Content ◽

Base Resin ◽

Denture Liners ◽

Denture Base Resin

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Influence of aging on bond strength of artificial teeth to denture base acrylic resins

Brazilian Journal of Oral Sciences ◽

10.20396/bjos.v17i0.8652929 ◽

2018 ◽

Vol 17 ◽

pp. 1-9 ◽

Cited By ~ 2

Author(s):

Etiene Faria Aguiar ◽

Rafaella Tonani ◽

Fabiana de Goes Paiola ◽

Michelle Alexandra Chinelatti ◽

Carolina Noronha Ferraz de Arruda ◽

...

Keyword(s):

Bond Strength ◽

Acrylic Resin ◽

Denture Base ◽

Thermomechanical Cycling ◽

Acrylic Resins ◽

Significant Difference ◽

Different Types ◽

Base Resin ◽

Artificial Teeth ◽

Denture Base Resin

Aim: The aim of this study was to evaluate the bond strength of artificial teeth to different types of denture base resins when submitted to thermomechanical cycling (TMC). Methods: Sixty artificial mandibular first molars (Trilux, Vipi) were randomly divided into 3 groups according to denture base acrylic resins (Vipi Wave, Vipi Cril, and Vipi Cril Plus, Vipi). The teeth were fixed onto self-polymerizing acrylic resin bars (0.5 cm2 cross-section x 2 cm height), and the set was included in a metal flask using dental stone/silicone. After the dental stone was set, the bar was removed, and the denture base resin was packed and processed according to the group studied (Vipi Wave: 180 W/20 minutes + 540W/5 minutes; Vipi Cril and Vipi Cril Plus: Water bath at 74ºC for 9h). After polymerization, the samples were divided into 2 groups (n=10), according to the TMC treatment received (simulation of 5 years of mastication or not). The samples were submitted to tensile bond strength test (1 mm/min), and the data (MPa) were statistically analyzed (2-way ANOVA, Bonferroni, α=0.05). The fracture interfaces were evaluated using a stereomicroscope (50x). Results: The bond strength results showed no statistically significant difference (p>0.05) between the resins studied. TMC was significant (p<0.05), demonstrating lower values for the bond strength of artificial teeth to Vipi Cril Plus. The predominant fracture type was cohesive in resin. Conclusions: It was concluded that there is no difference in bond strength between artificial teeth and the resins used for denture base. However, TMC decreases the bond strength values of artificial teeth and crosslink thermo-polymerizable acrylic resin.

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