Tensile Bond Strength Research Articles

Influence of oxygen effect in coating layer on tensile bond strength of PMMA

Polymethylmethacrylate (PMMA) is a widely used denture base material in dental practice and the improvement of its properties is important for improving the quality of treatment. The aim of this study is to increase the tensile bond strength between PMMA and soft liner with Thermionic Vacuum Arc. Surface properties were evaluated by Scanning Electron Microscope, Energy-Dispersive X-ray Analysis, and Atomic Force Microscope after the tensile bond strength test. As a result, the ZnO coating with TVA positively affects the PMMA surface properties compared to Ag and SnO2 groups and promising for clinical use.

An Enamel Based Biopolymer Prosthesis for Dental Treatment with the Proper Bond Strength and Hardness and Biosafety.

Although dental prosthesis materials such as metal alloys, ceramics, and cured resin composite have long been utilized to restore teeth, their bond strength and hardness values are not well matched to human enamel. Prosthesis detachment and opposing enamel wear are major concerns in restorative dentistry. An experimental biopolymer, hybridized enamel, was synthesized and utilized as a dental prosthesis to compare hardness and tensile bond strength (TBS) with those of commercial materials. Vickers hardness (VHN) with a 100 g loading for 15 s at eight indentations on each specimen (n = 20) was measured. TBSs between prostheses and two types of resin luting agents (n = 10), Super-Bond C&B and All-Bond2 + Duo-Link, were tested. Fractured surfaces and the luting resin-prosthesis interface were examined under a stereomicroscope or a scanning electron microscope (SEM). Statistically significant differences in the TBS and hardness were revealed (p < 0.05). The experimental biopolymer provided a hardness value comparable with human enamel and the highest TBS for both luting agent types. The SEM micrograph demonstrated a honeycomb-like pattern interface between the experimental biopolymer and luting resin. These results suggest that this experimental biopolymer may be a better restorative material to protect from natural enamel loss from tooth reduction or attrition and prevent prosthesis detachment during mastication.

MDP Salts: A New Bonding Strategy for Zirconia

Durable resin-ceramic adhesion may influence the clinical success of ceramic restorations, which has been one of the challenging issues in dentistry. The present study assessed the bond strength and chemical interaction of 10-methacryloxydecyl dihydrogen phosphate (MDP), MDP+silane, and MDP-salt primers to alumina-blasted zirconia ceramic by tensile bond strength test, surface elemental composition with x-ray photoelectron spectroscopy analysis, contact angle measurement, surface morphology with scanning electron microscopy, and surface topography with 3-dimensional confocal laser scanning microscope analyses. MDP-salt showed the highest tensile bond strength before and after thermocycling when compared with MDP and MDP+silane (P < 0.05). The measured contact angle values differed significantly (P < 0.001) in the order of MDP-salt > control (no chemical pretreatment) > MDP+silane > MDP. There was no difference in surface roughness (P = 0.317) and surface topography among all tested groups. Zirconia treated with MDP-salt showed phosphorus peaks in addition to zirconia and alumina peaks. MDP-salt has zirconia priming properties, which improves bonding performance to resin cement.

Radicular canal disinfection by photosensitizers activated by photodynamic therapy and Er, Cr: YSGG laser bonded to glass fiber post using different cement types. An Invitro study

AimTo assess the tensile bond strength (TBS) of conventional glass ionomer cement (GIC) and resin cemented fiber post to radicular dentin when disinfected with different photosensitizers methylene blue photosensitizer (MBP), curcumin photosensitizer (CP), and laser therapy Er, Cr: YSGG laser (ECYL) Material and MethodsSixty carefully extracted, non-traumatic, non-carious, closed apex human mandibular premolars were collected. Periodontal fibers, plaque, or calculi were detached. Decoration of samples was executed up till the cementoenamel junction. Samples were embedded perpendicularly in a heat cure acrylic resin. Canals of all specimens were shaped and cleaned with Protaper universal NiTi system dehydrated with paper points and obturated with gutta-percha. Post space was prepared after the removal of gutta-percha via peso reamers. Post space was disinfected with MBPv100mg/L in group 1; group 2 500 mg/L and group 3 ECL. After sequential photo-irradiation therapies, fiber post was luted with resinous cement and GIC (n = 10 each). After post-cementation, all specimens were subjected to tensile strength in the universal testing machine in Newton. Failure analysis was assessed at 30x magnification.TBS determination was statistically analyzed by one-way variance analysis (ANOVA), followed by the Tukey test (p= 0.05) by parallelizing different groups. ResultsFiber post cemented to radicular dentin with Rely X ARC resin cement and radicular canal disinfected with CP offered the highest TBS (289.25±3.27 N). Similarly, canal space disinfected with MBP and post-luted via Rely X ARC showed the lowest TBS (281.54±4.46 N). Intragroup comparison unveiled that there is no statistical difference between tensile strength sustained by two luting cement (p>0.05). ConclusionRely X ARC resinous cement bared the highest tensile bond strength for a post-dentine-cement bond with different photo-activated canal disinfectants (Methylene blue photosensitizer, Curcumin photosensitizer) and Er, Cr: YSGG then Vidrion C (GIC).

Autoclave Treatment of Sisal Fiber and Its Effect on Fiber Properties and on the Pull-out Behavior from Cementitious Matrix

ABSTRACT Natural fibers as reinforcement of cementitious matrices have become a material with greater toughness, strength, and sustainability for the construction industry. However, their use can generate some inconveniences due to the high-water absorption of the natural fiber, which affects the production and durability of composites. In this work, the autoclave treatment of sisal fibers was carried out in order to determine time and pressure values that result in a lower water absorption of the fibers. The fibers were exposed to 1.0 or 1.5 atm of vapor pressure for 30, 60 and 90 min and their structures were evaluated by X-ray diffraction, differential scanning calorimetry and scanning electron microscope. The effect of treatment on fiber dimensional variation, fiber mechanical properties, and fiber-matrix bond was investigated. Composites reinforced with treated fibers were produced and subjected to bending tests. The results indicate that the autoclave treatment with 30 min and 1.5 atm reduced the water absorption from 134% to 90% and the dimensional variation from 63% to 18%. However, structural modification of the fibers reduced the fiber’s tensile strength and bond strength. Composites reinforced with treated fibers showed lower flexural strength and toughness than those reinforced with natural fibers.

Photodynamic Therapy (PDT) in Prosthodontics: Disinfection of Human Teeth Exposed to Streptococcus mutans and the Effect on the Adhesion of Full Ceramic Veneers, Crowns, and Inlays: An In Vitro Study.

The use of PDT in prosthodontics as a disinfection protocol can eradicate bacteria from tooth surfaces by causing the death of the microorganisms to which the photosensitizer binds, absorbing the energy of laser light during irradiation. The aim of the study was to investigate the capacity of PDT to increase the bond strength of full ceramic restorations. In this study, 45 extracted human teeth were prepared for veneers, crowns, and inlays and contaminated with Streptococcus mutans. Tooth surfaces decontamination was performed using a diode laser and methylene blue as a photosensitizer. The disinfection effect and the impact on tensile bond strength were evaluated by scanning electron microscopy (SEM) and pull-out tests of the cemented ceramic prosthesis. Results show that the number of bacteria was reduced from colonized prepared tooth surfaces, and the bond strength was increased when PDT was used. In conclusion, the present study indicates that using PDT as a protocol before the final adhesive cementation of ceramic restorations could be a promising approach, with outstanding advantages over conventional methods.

Durability of resin bonding to lithium disilicate using different self-etching and conventional ceramic primers after long-term aging

ObjectivesTo evaluate the bonding durability after artificial aging provided by a self-etching and a no-etching ceramic primer compared to primers, which are applied by the etch and rinse method. MethodsLithium disilicate blocks were bonded to a composite resin (Clearfill Core, Kuraray) using 5 bonding methods (N = 24). Specimens of group MEP were bonded using a self-etching primer and the corresponding luting resin (Monobond Etch&Prime/Variolink Esthetic, Ivoclar Vivadent) Specimens of group UBE were bonded using a two-bottle silane solution (Universal Primer/Estecem, Tokuyama) without hydrofluoric acid ceramic etching. Specimens of the other 3 groups were bonded using etch and rinse bonding systems with prior hydrofluoric acid ceramic etching (MPV: Monobond Plus/Variolink Esthetic, Ivoclar Vivadent; SUR: Scotchbond Universal/RelyX Ultimate, 3 M; GML: G-Multi Primer/G-CEM LinkForce, GC). Each group was divided into 3 subgroups (n = 8) according to the storage conditions (3 days water storage (37 °C), 30 days water storage, 7,500 thermal cycles (5–55 °C) and 150 days water storage, 37,500 thermal cycles). The tensile bond strength (TBS) was measured and the data was statistically analyzed. ResultsAfter 3 days the median TBS ranged from 14.6 to 41.7 MPa, after 30 days from 4.2 to 39.0 MPa and after 150 days from 0 to 29.7 MPa. Both bonding systems utilizing a self-etching primer showed a significantly lower TBS than group MPV using a conventional ceramic bonding system. SignificanceEspecially after long-term storage with additional thermal cycling the bonding systems using primers without hydrofluoric acid ceramic etching do not provide a high bond strength.

47 - Effect of Sintering and Etching Protocols of Zirconia-Reinforced-Li2O-SiO2 on Bond-Strength

The optimal tensile bond strength of zirconia reinforced lithium-disilicate after multiple glazing firing protocols, different etching time and etchant concentration needs to be evaluated. Purpose of this study was to evaluate the effect of different firing cycles and etching condition on resin cement tensile bond strength of zirconia reinforced lithium disilicate system glass ceramics to titanium. Square-shaped specimens (N=53) were prepared from blocks of zirconia reinforced lithium silicate glass ceramics (CeltraDUO) with 12.5 mm×14 mm rectangular tiles of 2 mm thickness. The specimens were subjected to different firing cycles and etching conditions. They were cemented onto titanium rods (Grade V Ti-alloy, 4.8 mm in diameter, and 1 inch in length) with a resin cement (Theracem), and then tested for tensile bond strength. Least square mean linear regression model was used to analyze the effects on tensile bond strength data using JMP Pro 13.2, followed by the post hoc Tukey tests and tests (α= 0.05). The tensile bond strength was significantly affected by etching duration (p<0.001) and firing cycles (p<0.001), but not significantly affected by etchant concentration (p=0.31). The highest load to failure was observed at 30-60 seconds of etching time and the least load to failure was observed at 20 seconds of etching time. In terms of firing cycles, 1 firing cycle provided the highest load to failure in contrast to least load to failure observed with no firing. Changes in etching time and firing condition of the specimens had a significant effect on the resin cement tensile bond strength of zirconia reinforced lithium disilicate. On the other hand etching the specimens under different concentrations of 5 and 9.6% did not differ statistically in terms of resin cement tensile bond strength.

Investigating Tensile Bonding and Other Properties of Yttrium Oxide Nanoparticles Impregnated Heat-Cured Soft-Denture Lining Composite In Vitro.

ABSTRACTAims:This study was conducted to assess the effect of the addition of yttrium oxide (Y2O3) nanoparticles on the tensile bond strength, tear strength, shore A hardness, and surface roughness of soft-denture lining material.Materials and Methods:Y2O3 NPs with 1.5 and 2 wt.% were added into acrylic-based heat-cured soft-denture liner. A total of 120 specimens were prepared and divided into four groups according to the test to be performed (tensile bond strength, tear strength, surface hardness, and surface roughness).Results:There was a highly significant increase in tensile bond strength between the soft liner and the acrylic denture base, tear strength, and hardness at both concentrations as compared to the control group, whereas there was a nonsignificant difference between 1.5wt% of Y2O3 nanoparticles and the control group, and between 1.5wt% and 2wt% of Y2O3 nanoparticles. But there was a significant difference between 2wt% of Y2O3 nanoparticles and the control group.Conclusion:The Y2O3 nanoparticles impregnated in soft-lining materials increased the mechanical properties of both tensile bonding strength and tear strength. Also, there was a significant increase in hardness but there was no change in surface roughness of acrylic-based denture soft-lining materials.

Effects of surface modification techniques on zirconia substrates and their effect on bonding to dual cure resin cement - An in- vitro study.

This study aims to evaluate the effect of different surface treatments of monolithic zirconia on the bond strength of resin to zirconia and, to explore alternative methods to improve this bonding. In-Vitro study. Fifty rectangular sintered blocks of Yttria-stabilized Tetragonal Zirconia Polycrystal ceramics of dimensions were milled and sintered. These specimens were further divided into five groups (control, air abrasion, etching with primer application, air abrasion with primer application and novel glass infiltrated zirconia surface group), containing 10 samples each. The specimens were analyzed for surface roughness, tensile bond strength to resin cements, and adhesive and cohesive mode of failures. ANOVA and Post-Hoc Tukey test was perform to evaluate the significant differences in the mean values of the groups. Air-abraded samples showed the highest surface roughness (4.95 ± 0.65) (P < 0.05). The group with air abrasion followed by primer application showed the highest tensile bond strength (7.12 ± 0.69) (P < 0.05). The lowest surface roughness (0.638 ± 0.8093) and tensile bond strength (2.03 ± 0.58) was seen in samples that were subjected to etchant treatment followed by application of methacryloyloxydecyl di-hydrogen phosphate (MDP) primer. The changes in comparison to the control group were statistically insignificant (P > 0.05). Except Groups A (control) and C (etchant followed by primer), all other groups showed a cohesive failure. Air abrasion of the zirconia surface with 50 μm alumina particles increases the surface roughness without damaging the surface. Air abrasion followed by MDP primer application is the recommended method of surface treatment to achieve superior bonding. Glass infiltration also showed promising results in terms of tensile bond strength.

O4 - Silane Containing Universal Adhesive/Cement for Bonding to Silica-Coated High-Translucent Zirconia

The aim of this study was to evaluate the bonding performance of high-translucent zirconia when pretreated with glass beads and the efficiency of silane contained in self-adhesive resin cement and universal adhesive as chemical treatment for silica-coated high-translucent zirconia. 240 fully sintered disk-shaped zirconia specimens (Y-PSZ, Zpex smile, Tosoh, Japan) were assigned to 4 groups according to mechanical surface pretreatment: alumina particles abrasion with 0.2 MPa pressure (AB2), tribochemical silica-coating with 0.2 MPa (TSC), and glass beads air-abrasion with 0.2 MPa (GB2) and 0.4 MPa (GB4). Each group was cemented with Panavia SA Universal (SAU), Rely X Ceramic Primer (3 M ESPE) + Panavia SA plus (Kuraray Noritake Dental) (S-SAP), and Clearfil Universal Bond Quick + SAP (U-SAP). Tensile bond strength (TBS) was measured at crosshead speed of 2 mm/min after 24 h or 10000 thermocycling (TC) followed by the failure modes analysis (n=10). Surface morphology and surface elemental composition of the abraded zirconia surface analyses were examined under SEM/EDS. Survival analysis was done for TBS data (p = 0.05). After TC, there was a significant decrease in bond strength all groups except TSC and GB4 treated with S-SAP. S-SAP showed highest TBS with TSC, GB2, and GB4. AB2 indicated the highest TBS with U-SAP. SAU showed higher TBS with GB4 compared to GB2. GB4 represented the highest Si content compared to TSC and GB2. Sailanization of glass beads air-abraded zirconia ceramic is mandatory step for successful adhesion to resin cement. Silane containing self-etch adhesive cement was more effective than universal adhesive for glass beads treated zirconia especially with higher air-pressure, but both are less efficient than pure silane treatment. While universal adhesive is efficient pretreatment on tribochemical silica-coating surface and the most effective on alumina-blasted zirconia ceramic.

Bond strength of different orthodontic brackets produced with different materials and fabrication methods

Objective: The aim of this study was to evaluate the effects of material and processing methods on the bondstrength of orthodontic brackets. Material and Methods: Five types of brackets were tested: Conventionalmetallic (CM), metallic sandblasted (SB), ceramic (C), polycarbonate (PC), and metallic fabricated by meltinginjection molding (MIM). Shear bond strength (SBS) was conducted to check bond strength of the bracketsbonded to bovine teeth (n=10/group), and tensile bond strength (TBS) (20 brackets/group) to check bracketretention to bonding material (n=20/group). Both, SBS and TBS were conducted with 1mm/min crossheadspeed in a universal testing machine. Bond strength was calculated in Megapascal (MPa) based on force (N) andbracket area (mm2). Data normality was verified, and One-way ANOVA was the statistical test with Tukey posthoc(a=0.05). Results: SB and MIM presented higher SBS compared to C, PC, and CM (p&lt;0.05). SB and MIMalso presented significantly higher TBS compared to CM and PC (p&lt;0.05). However, MIM was not different ofC for TBS. Conclusion: The type of material and method of fabrication are determinant factors that affect bondstrength of orthodontic brackets and melting injection molding (MIM) is a remarkable technology to improvebrackets retention during the orthodontic treatment. KEYWORDSBond strength; Orthodontic brackets; Melting injection molding.

Comparison of tensile and shear bond strengths of layering porcelain with VITA Suprinity after different surface treatment methods: An in vitro study

Comparison of tensile and shear bond strengths of layering porcelain with VITA Suprinity after different surface treatment methods: An in vitro study

Comparative Evaluation of Surface Science Approach with Indirect Tensile Strength and Binder Bond Strength Tests to Determine Aggregate-Bitumen Bond

Abstract The present study investigated the efficacy of moisture sensitivity parameters obtained from the surface free energy (SFE) approach, namely the energy ratio (ER) and physiochemical parameters, by comparing the tensile strength ratio (TSR) and bond strength ratio (BSR) parameters, obtained from indirect tensile strength and binder bond strength tests, respectively. The bond strength against the moisture damage of basalt aggregates collected from two different sources with three different binder types, namely, unmodified (VG30), crumb rubber–modified (CRMB60), and polymer-modified (PMB40) binders, was evaluated. Results showed that both the ER parameter, which evaluates stripping potential of bitumen, and physiochemical parameters, which relate the compatibility of water with aggregate and bitumen, evaluated different rankings of an aggregate-bitumen system against moisture damage. However, the comparative study showed that physiochemical parameters evaluated similar rankings of aggregate and bitumen as obtained using TSR and BSR parameters in determining the aggregate-bitumen bond. Thus, it indicates that stripping of a binder may not always be the primary reason for moisture damage in bituminous mixes. It was observed that B2-CRMB60 with the highest ER of 0.71 was the least favorable combination in terms of resistance to moisture damage because of its lowest value of standard TSR and BSR parameters (i.e., 0.72 and 0.74, respectively) compared with five other combinations of aggregate-bitumen systems. Therefore, it is advised to carefully select the bond strength parameters to identify compatible aggregate-bitumen combinations while using the SFE approach. Further, it was found that the SFE approach is capable of addressing the complex moisture damage mechanisms in bituminous mixes; hence, it can be used for forensic investigations related to moisture damage in the field.

Effect of surface treatments on the tensile bond strength of heat cure silicone soft liner to an acrylic resin denture base in a simulated oral environment - A comparative SEM study

Effect of surface treatments on the tensile bond strength of heat cure silicone soft liner to an acrylic resin denture base in a simulated oral environment - A comparative SEM study

Effects of two methyl methacrylate-tributylborane-based luting agents with a silane-phosphate primer on bonding of four different CAD/CAM resin composite materials.

This study compared the bond strengths of four adhesive systems and four different resin composite block materials: Gradia Block (GR), Shofu Block HC (SH), Estelite Block (ES), and KZR-CAD HR2 (KZ). A primer (PZ-AB) containing a silane (γ-MPTS) with 10-methacryloyloxydecyl dihydrogen phosphate (MDP) was applied to ground surfaces of the resin composite block specimens, and the specimens were then bonded to stainless-steel rods using two methyl methacrylate-tributylborane (MMA-TBB)-based luting agents (SB and MT), designated as the PZ-AB/SB and PZ-AB/MT adhesive systems, respectively. The SB resin contained 4-methacryloyloxyethyl trimellitate anhydride (4-META), whereas the MT resin did not. The SB resin without primer (No primer/SB) and a dual-curing composite-type adhesive system (UPA/RelyX) were used as controls. The 24-h tensile bond strengths were determined and analyzed using the Tukey-Kramer HSD test (α = 0.05, n = 8). The highest bond strengths were obtained for the GR/PZ-AB/MT, GR/PZ-AB/SB, KZ/PZ-AB/MT, ES/PZ-AB/SB, and KZ/No primer/SB groups, whereas the KZ/UPA/RelyX, ES/UPA/RelyX, SH/UPA/RelyX, and SH/No primer/SB groups exhibited the lowest bond strengths. For each resin composite block material primed with γ-MPTS and MDP, the MMA-TBB-based luting agents, irrespective of the presence of 4-META, provided higher bond strengths than the dual-curing composite-type adhesive system.

A study of the tensile bond strength between Polyetherketoneketone (PEKK) and various veneered denture base resin

A study of the tensile bond strength between Polyetherketoneketone (PEKK) and various veneered denture base resin

Comparative evaluation of eighth-generation bonding agent modified with 7% arginine and 0.12% chitosan for antibacterial property and microtensile bond strength.

Aim:The aim of this study was to evaluate and compare eighth-generation bonding agent (G-Premio BOND) modified with 7% arginine and 0.12% chitosan for antibacterial property and microtensile bond strength.Methods:To evaluate antibacterial property, the sterile 96-microtiter plate was taken. The sidewalls of nine wells were coated with 15 μl of adhesive from each group. Suspension of Streptococcus mutans bacteria was placed on each group of adhesive and antibacterial property was checked using Spectrophotometer. Thirty-three healthy extracted premolars were taken and adhesive from each group was applied on the exposed surface of dentin, and the specimens were tested using a universal testing machine at crosshead speed of 1 mm/min.Results:The least antibacterial efficacy was seen with unmodified eighth-generation bonding agent. This result was statistically significant when all study groups were compared. Microtensile bond strength was evaluated and the highest mean value (5.07) was seen with adhesive modified with 7% arginine, followed by adhesive modified with 0.12% chitosan (mean value: 4.14), and unmodified adhesive had the lowest mean bond strength value (4.07).Conclusions:The eighth-generation bonding agent modified with 7% arginine and 0.12% chitosan showed antibacterial efficacy against S. mutans. In addition to this, they also had higher tensile bond strength values as compared to unmodified adhesive.

Study on the Effect of Bond Strength on the Failure Mode of Coarse-Grained Sandstone in Weakly Cemented Stratum

Bond strength is one of the most important parameters and can affect the macroscopic mechanical properties and the damage state of rock to some degree. Coarse-grained sandstone was studied using the controlled variable method. The influence of parallel bond strength on the peak strength and failure mode of coarse-grained sandstone was simulated, and the evolution law of peak strength and the failure mode of bond strength were comprehensively analyzed. The results show that the peak strength of the rock was positively correlated with the bond strength; the difference in quantity between the tensile and shear cracks was negatively correlated with tensile bond strength and positively correlated with shear bond strength. With a tensile-shear bond strength ratio of less than 0.5, the peak strength of the rock was usually stable at the certain extreme value under a constant tensile bond strength. The tensile cracks were negatively correlated with the tensile-shear bond strength ratio, and the shear cracks were positively correlated with the tensile-shear bond strength ratio. The main failure mode of the coarse-grained sandstone in the weakly cemented stratum of the Hongqinghe coal mine is shear failure. The research results can be used to guide the ground control of other mine stopes or roadways with weak cementation lithology.

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

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.