Effect of the CO2 Laser as Surface Treatment on the Bond Strength of Heat Cured Soft Liner to the High Impact Acrylic Denture Base Material

2017 ◽  
Vol 29 (1) ◽  
pp. 20-26 ◽  
Author(s):  
Hawraa Khalid Aziz
Keyword(s):  
Bond Strength ◽  
Surface Treatment ◽  
Co2 Laser ◽  
Base Material ◽  
High Impact ◽  
Denture Base ◽  
Soft Liner

scholarly journals Evaluation of Bond Strength and Dimensional Accuracy of Soft Liner to Microwave Cured Denture Base Material

2020 ◽  
Vol 10 (2) ◽  
pp. 32-37
Author(s):  
Shilan H. Fatah ◽  
Radhwan H. Hasan
Keyword(s):  
Bond Strength ◽  
Surface Treatment ◽  
Base Material ◽  
Mean Value ◽  
Water Bath ◽  
Denture Base ◽  
Liner Material ◽  
Significant Difference ◽  
Soft Liner ◽  
Pmma Surface

Today, soft liners are being widely used in dental practices by their application to the inner surfaces of the denture with hopes to evenly distribute any potential uneven forces, and to provide a cushion effect to the oral mucosa of the patient mouth. The aim of this study is to investigate the influence of (a) polymethylmethacrylate (PMMA) denture base material curing technique, (b) Molloplast B soft liner curing technique, and (c) PMMA surface treatment, on the “shear bond strength” (SBS) between the Molloplast B liner and PMMA. A total of 80 samples were used in this study to evaluate the SBS performance of microwave (Nature-Cryl, Acron Gc, Japan) and conventional water bath (Ivoclar triplex, Liechtenstein) curing techniques of PMMA, and to evaluate the curing technique of soft liner material Molloplast B (DETAX,GERMANY). Surface treatment of PMMA was performed for half of the samples using neodymium:yttrium aluminum-garnet Nd:YAG laser, and the other half of the samples were surface-treated using AL2O3 sandblasting method. The results showed that the highest mean value in conventional water bath-cured soft liner was 26.69 MPa, whereas the lowest mean value for microwave-cured soft liner was 15.22 MPa. No significant difference was observed between the SBS performance regarding the PMMA surface treatment and curing techniques. Conventional water bath curing technique for soft liner treatment improved the SBS performance. Regarding the PMMA curing technique, the conventional water bath achieved higher SBS, yet the difference was not statistically significant. Finally, surface treatment using laser improved the SBS compared to sandblasted method, but the improvement here was also statistically insignificant.

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.

scholarly journals Bond Strength of Reline Resins to Aged-simulated Denture Base Acrylic Resin

2016 ◽  
Vol 7 (1) ◽  
pp. 1-5
Author(s):  
Alessandra Buhler Borges ◽  
Carlos Rocha Gomes Torres ◽  
Graziela Ribeiro Batista ◽  
Eduardo Bresciani ◽  
Erica Crastechini ◽  
...  
Keyword(s):  
Tensile Strength ◽  
Bond Strength ◽  
Tensile Test ◽  
Surface Treatment ◽  
Thermal Aging ◽  
Base Material ◽  
Acrylic Resin ◽  
Denture Base ◽  
Single Cone ◽  
One Way Anova

ABSTRACT Objectives The aim of this study was to evaluate the bond strength of different direct reliners to acrylic resin for denture base. Materials and methods Double-cone specimens were made: HA-heat-cured acrylic resin-(n = 20); U-Ufi Gel Hard C-(n = 10); K: Kooliner-(n = 10); R-Rebase II Fast-(n = 10) and RH-Rebase II Fast + Resin Hardener-(n = 10). Ten HA samples were immediately submitted to cohesive test. The remaining HA samples and others were submitted to thermal aging (HAaged, 1000 cycles, 5.55oC), followed by tensile test. For tensile strength, 50 single cone-shaped samples were made of heat-cured acrylic resin and aged (HAaged, 1000 cycles, 5.55oC). After surface treatment, relining resin cones were build up using silicon molds, and stressed to failure. Values of cohesive and tensile strength were submitted to one-way ANOVA and Tukey's test (α = 5%). Results Bond strength were: HA/HAaged: 21.17 (±4.89)a, U/HAaged: 11.56 (±1.98)b, R/HAaged: 9.69 (±2.37)b, RH/ HAaged: 9.38 (±1.78)bc and K/HAaged: 5.98 (±1.90)c. The cohesive strength were: KCoe: 22.29(±4.06)a; RCoe: 23.99 (±3.29)a; RHCoe: 24.84 (±3.88)a; UCoe: 25.62 (±3.03)a; HAaged: 36.06 (±8.65)b and HA:42.29 (±7.68)b. Groups followed by the same letters do not show differences. Conclusion Bond strength of acrylic resin to acrylic denture base material is higher than the reliners and Ufi Gel Hard C showed the higher bond strength. How to cite this article Zanatta RF, Batista GR, Crastechini É, Bresciani E, Borges AB, Torres CRG. Bond Strength of Reline Resins to Aged-simulated Denture Base Acrylic Resin. World J Dent 2016;7(1):1-5.

Effect of Argon Plasma Pretreatment on Tensile Bond Strength of a Silicone Soft Liner to Denture Base Polymers

2013 ◽  
Vol 89 (7) ◽  
pp. 594-610 ◽  
Author(s):  
Arzu Zeynep Yildirim Bicer ◽  
Arife Dogan ◽  
Selda Keskin ◽  
Orhan Murat Dogan
Keyword(s):  
Bond Strength ◽  
Argon Plasma ◽  
Tensile Bond Strength ◽  
Denture Base ◽  
Plasma Pretreatment ◽  
Soft Liner
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