Evaluation and comparison of the effect of different chemical surface treatments (monomethyl methacrylate monomer, dichloromethane, and 1:1 v/v 30% trichloromethane and monomethyl methacrylate monomer solvent) on the shear bond strength of acrylic resin teeth to the heat cure denture base resin

2019 ◽  
Vol 6 (1) ◽  
pp. 1
Author(s):  
Rupali Pathak ◽  
Rajneesh Kumar ◽  
Sonali Mahajan ◽  
Priya Singh ◽  
Devesh Tiwari ◽  
...  
Keyword(s):  
Bond Strength ◽  
Shear Bond Strength ◽  
Acrylic Resin ◽  
Surface Treatments ◽  
Denture Base ◽  
Chemical Surface ◽  
Heat Cure ◽  
Base Resin ◽  
Methacrylate Monomer ◽  
Denture Base Resin

scholarly journals Comparison of Bond Strength of Acrylic, Composite, and Nanocomposite Artificial Teeth to Heat-Cure Acrylic Denture Base Resin

2019 ◽  
Author(s):  
Tahereh Ghaffari Gharebagh ◽  
Fahimeh Hamedirad ◽  
Keyvan Miruzadeh
Keyword(s):  
Bond Strength ◽  
Shear Bond Strength ◽  
Tooth Surface ◽  
Denture Base ◽  
Heat Cure ◽  
Base Resin ◽  
Bond Strengths ◽  
The Mean ◽  
Artificial Teeth ◽  
Denture Base Resin

Objectives: The present study aimed to evaluate the bond strength of heat-cure denture base resin to newly designed Iranian artificial acrylic teeth. Materials and Methods: In this in-vitro experimental study, shear bond strengths of Ivoclar acrylic, Apple composite, and B-Star nanocomposite teeth to heat-cure acrylic denture base resin were compared. A total of 18 samples were selected from each group of teeth. The samples were attached to heat-cure resin according to ISO 10477 standard. For the assessment of bond strength, the samples were placed in a universal testing machine and were subjected to shear forces at a speed of 1 mm/minute to record the fracture load. Descriptive statistics, including frequency, mean, and standard deviation, were calculated using SPSS 20 software. Two-way analysis of variance was used to compare the shear bond strength of the groups with and without monomers and the studied artificial teeth. Results: The mean shear bond strengths of Ivoclar acrylic teeth were 392.22±23.76 MPa and 337.11±32.18 MPa with and without adding monomers to the tooth surface, respectively. The mean shear bond strengths were 250.44±29.84 MPa and 238.33±27.28 MPa (without monomers) and 438.33±24.16 MPa and 311.56±32.78 MPa (with monomers) for Apple composite and B-Star nanocomposite artificial teeth, respectively. Conclusion: The greatest shear bond strength was attributed to Ivoclar acrylic teeth followed by Apple composite and B-Star nanocomposite artificial teeth. Addition of monomers to the tooth surface significantly strengthened the shear bonding of acrylic base resin to the teeth.

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

2016 ◽  
Vol 17 (2) ◽  
pp. 154-159 ◽  
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.

scholarly journals Comparative Evaluation of Compressive Bond Strength between Acrylic Denture Base and Teeth with Various Combinations of Mechanical and Chemical Treatments

Coatings ◽  
2021 ◽  
Vol 11 (12) ◽  
pp. 1527
Author(s):  
Mohammed E. Sayed ◽  
Honey Lunkad ◽  
Ibrahim Fageeh ◽  
Mahdi Jaafari ◽  
Ali Tawhari ◽  
...  
Keyword(s):  
Bond Strength ◽  
Surface Treatments ◽  
Acid Etching ◽  
Manufacturing Companies ◽  
Air Abrasion ◽  
Denture Base ◽  
Chemical Surface ◽  
Anterior Teeth ◽  
Base Resin ◽  
Denture Base Resin

Debonding and detachment of artificial teeth from the denture base is frequently encountered in prosthodontic practice. This study aims to assess the effect of modifications in the ridge-lap surface of denture teeth with various combinations of mechanical and chemical surface treatments with hydrofluoric acid on bond strength with the acrylic denture base resin and to identify the failure modes (adhesive, cohesive, or mixed). Seventy acrylic resin teeth samples were randomly divided into seven groups (n = 10): a control group (unmodified) and six treatment groups, in which various combinations of mechanical and chemical surface treatments were performed. Then, these teeth were attached to a heat-cured denture base resin block at 45° angulation. The acrylized test samples were thermocycled, and the compressive bond strength was evaluated using a universal mechanical testing machine. The results suggest that roughening with diamond burs yields the highest bond strength, whereas etching/grooving and air abrasion result in the lowest bond strength. Acid etching complemented air abrasion to improve bond strength, while negative effects were noted with acid etching in other groups. Furthermore, roughening at the neck portion of the acrylic teeth can be used by the manufacturing companies as a standard to provide higher bond strength while maintaining the esthetics of the anterior teeth.

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