Comparison of dentin bond durability of a universal adhesive and two etch-and-rinse adhesive systems

Kawazu, Mami; Takamizawa, Toshiki; Hirokane, Eizo; Tsujimoto, Akimasa; Tamura, Tomohiko; Barkmeier, Wayne W.; Latta, Mark; Miyazaki, Masashi

doi:10.1007/s00784-019-03153-y

Cited by 22 publications

(13 citation statements)

References 31 publications

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“…Thus, although SBS was not an exact measure of the interfacial bond, it represented the cohesive strength of dentin. Evidence from several studies supports the hypothesis that cohesive failure in dentin is related to high bond strength [27], perhaps because of the strong bonding to dentin developed by universal adhesives [28]; the enhanced wettability of adhesives, which allows better micromechanical retention and chemical interaction between the acidic functional monomer contained in SBU (10-methacryloyloxydecyl dihydrogen phosphate) and calcium in dentin [29]; and the high resinous monomer content in CN and AB, which facilitates strong co-curing with the adhesive. The slight but significant difference in SBS between CN-SBU and AB-SBU, and the absence of a significant difference in failure pattern, may be attributable to their different flexural moduli (7.4 GPa for CN-LC vs 2.3 GPa for AB-LC).…”

Section: Discussionmentioning

confidence: 85%

Flexural properties and dentin adhesion in recently developed self-adhesive bulk-fill materials

et al. 2021

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This study investigated the flexural properties, shear bond strength (SBS) and interface to dentin of three recently developed selfadhesive bulk-fill materials. Methods: Bars of Surefil One (SO), Cention N (CN), Activa BioActive Restorative (AB) and EQUIA Forte HT Fil (EQUIA) were tested for flexural strength and flexural modulus in self-curing and light-curing modes. In addition, SBS to dentin was tested in specimens without pretreatment and after application of universal adhesive (Scotchbond Universal). EQUIA was used as the control material. Results: The flexural properties were significantly better in light-curing mode for all materials except CN. CN had the highest SBS values after universal adhesive application (33.8 MPa), and SO had the highest SBS without pretreatment (20.9 MPa). Conclusion: The mechanical and adhesive properties of these new materials varied widely.

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Section: Discussionmentioning

confidence: 85%

Flexural properties and dentin adhesion in recently developed self-adhesive bulk-fill materials

et al. 2021

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“…[20][21][22][23] Moreover, Kawazu et al revealed that SU did not show any significant decrease in SBS from the baseline under any degradation condition. 24 SU is a mild UA (pH ≈ 2.7) that contains MDP monomer, and the superior performance of this adhesive is attributed to the formation of a firm nanolayer around dentinal hydroxyapatites. 25,26 According to Perdigão et al, the unique combination of MDP monomer and polyalkenoic acid copolymer (Vitrebond copolymer) in SU improves the chemical bonding to dentin.…”

Section: Discussionmentioning

confidence: 99%

Influence of Low-Level Laser Modification and Adhesive Application Mode on the Bonding Efficiency of Universal Adhesives to Er:YAG Laser-Ablated Dentin

2021

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Introduction: Erbium laser ablation as a method of tooth preparation and conditioning has shown promising results. Although previous studies have adopted various combinations of different laser parameters and several dentin adhesive systems, very few have investigated combining high-level and low-level ER:YAG lasers with Universal adhesives. This study aimed to assess the impact of using low-energy irradiation on the surface micro-topography and shear bond strength (SBS) of universal adhesive (UA) to the erbium:yttrium-aluminum-garnet (Er:YAG) laser-ablated dentin substrate, bonded in etch-and-rinse or self-etch adhesive mode. Methods: Eighty-seven extracted molars were sectioned to expose flat occlusal dentin surface; 60 teeth were divided equally into three groups according to the surface treatment; bur-cutting (B), Er:YAG high-energy laser cutting (L1 - 200 mJ, 20 Hz, 50 μs pulse), or L1 followed by low-energy laser modification (L1 /L2 - 80 mJ, 10 Hz, 50 μs pulse). Then each group was equally divided into two groups (n=10) according to the mode of application of the universal adhesive; either etch-and-rinse (ER) or self-etching (SE). The samples were subjected to thermocycling (5000 cycle between 5°C and 55°C), and SBS was tested. Two-way ANOVA and Tukey post hoc test were used to analyze the results. The remaining 27 samples were used to investigate the effect of the treatment on the topography of the treated dentin surfaces using a scanning electron microscope (SEM). Results: B/SE recorded the highest SBS (25.48 ± 2.6 MPa) followed by B/ER (23.20 ± 6.8 MPa) and L1 /L2 /SE (22.94 ± 4.1 MPa) and with no statistically significant difference between these groups (P >0.05). The lowest SBS results (P<0.05) were recorded for L1/SE (12.22 ± 3 MPa). No statistical differences were found between the SBS of L1 /L2 /ER and L1 /ER groups or between the SBS of L1 /L2 / ER and L1 /L2 /SE groups. Conclusion: A subsequent treatment of the Er:YAG laser-ablated dentin with low-energy laser modification mode (LMM) enhances the SBS of the tested UA when applied in SE mode.

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“…Huang et al demonstrated similar results when using phosphoric acid and self-etch bond to dentin [ 32 ]. Bonding degradation was explained by Kawazu et al, stating that thermocycling would accelerate deterioration and initiate cracks of the resin/dentin interface by mean of thermal expansion [ 33 ].…”

Section: Discussionmentioning

confidence: 99%

Comparison between Shear Bond Strength of Er:YAG and Er,Cr:YSGG Lasers-Assisted Dentinal Adhesion of Self-Adhering Resin Composite: An Ex Vivo Study

et al. 2020

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(1) Background: Bonding composite to tooth structure is still evolving with a substitute for phosphoric acid being the main challenge. Lately, a self-adhering composite (SAC) was developed, promising to simplify bonding to tooth structure. Unfortunately, retention especially to dentin, was not as good as the gold standard three steps bonding system. During the last 2 decades, lasers were used to enhance shear bond strength of composite to tooth structure. However, the literature provided limited information regarding laser efficiency in the immediate, as well as the long term, adhesion success of SACs to dentin. The purpose of our study was to define the optimal irradiation conditions to improve the adhesion of self-adhering flowable resin composite to dentin exposed to Er:YAG and Er,Cr:YSGG laser irradiation. (2) Methods: Seventy-two freshly extracted human third molars, prepared to have flat dentinal surfaces, were randomly divided into three groups (n = 24) including a control group (Group 1) in which dentin was left without laser irradiation. The other two groups (Group 2 and 3) received standardized irradiation at a speed of 1 mm/second with Er:YAG (60 mJ; SSP mode = 50 μs; 10 Hz; fluency of 9.4 J/cm2; beam diameter: 0.9 mm; air 6 mL/min; and water 4 mL/min), and Er,Cr:YSGG: 1.5 W; fluency of 17.8 J/cm2; turbo handpiece with MX5 short insert; 20 Hz under air/water spray (65% air, 55% water). Self-adhering flowable resin was applied to dentin in all groups. Half of the specimens were stored in water for 24 h while the other half underwent 3000 thermal cycles. Later, all specimens received a shear bond strength test. Fracture observation was done first under a stereomicroscope then by using a scanning electron microscope. (3) Results: The mean values of shear bond strength for both laser-treated dentin groups (Er:YAG laser: 13.10 ± 1.291, and Er,Cr:YSGG: 14.04 ± 5.233) were higher than in the control group 1 (8.355 ± 2.297) before thermocycling. After thermocycling, shear bond strength decreased in all groups as follows: 10.03 ± 1.503, 10.53 ± 2.631, and 02.75 ± 1.583 for Er:YAG, Er,Cr:YSGG, and nonirradiated dentin, respectively. Shear bond strength values showed a significant difference between the control group (Group 1) and both lasers groups (Group 2 and 3). Statistical analysis of stereomicroscope observation revealed no significant difference between laser irradiation and failure mode (p < 0.136). SEM observation of the dentin surface in both laser-irradiated groups showed opened tubules, absence of smear layer as well as an increase of resin infiltration into dentinal tubules. (4) Conclusion: Er:YAG and Er,Cr:YSGG lasers enhance self-adhering flowable resin shear bond strength values and improve its longevity by eliminating the smear layer, opening dentinal tubules and increasing resin infiltration into the microstructure.

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Comparison of dentin bond durability of a universal adhesive and two etch-and-rinse adhesive systems

Cited by 22 publications

References 31 publications

Flexural properties and dentin adhesion in recently developed self-adhesive bulk-fill materials

Flexural properties and dentin adhesion in recently developed self-adhesive bulk-fill materials

Influence of Low-Level Laser Modification and Adhesive Application Mode on the Bonding Efficiency of Universal Adhesives to Er:YAG Laser-Ablated Dentin

Comparison between Shear Bond Strength of Er:YAG and Er,Cr:YSGG Lasers-Assisted Dentinal Adhesion of Self-Adhering Resin Composite: An Ex Vivo Study

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