Resin Bonding of Self-Etch Adhesives to Bovine Dentin Bleached from Pulp Chamber (original) (raw)
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Effect of different pretreatment methods on dentin bond strength of a one-step self-etch adhesive
The journal of contemporary dental practice, 2009
The aim of this in vitro study was to evaluate the shear bond strength of a one-step self-etch adhesive to dentin pretreated with phosphoric acid, air abrasion, or laser. Fifty-six extracted non-carious human mandibular molars were mounted and the occlusal surfaces ground with a mechanical grinder to obtain flat occlusal dentin surfaces. The teeth were randomly divided into four groups of 14 teeth according to the different dentin surface pretreatment methods: Group I--acid, Group II--laser, Group III--air abrasion, Group IV (control)--no surface treatment. After applying a one-step self-etch adhesive system, Futura Bond NR, cylinders of Z250 composite resin were bonded to the dentin surfaces by transparent gelatin capsules (2.5 mm diameter; 3 mm high) and then polymerized. All specimens were stored in distilled water at 37 masculineC for 24 hours. Shear bond testing was carried out using an Universal testing machine with a crosshead speed of 0.5 mm/sec. Data were analyzed using the...
PubMed, 2006
Objective: The purpose of this study was to evaluate the microtensile bond strength (mu TBS) of four total-etch adhesives [Excite (EB), Prime&Bond NT (PBNT), Single Bond (SB), and One Coat Bond (OCB)] by comparing them to five self-etching adhesives (Clearfil SE Bond (CSEB), Xeno III (X III), Prompt L-Pop (PLP), AQ Bond (AQB), and Tyrian/One Step plus (TOSP)] at different dentinal areas. In addition the interface between the adhesive resins and dentin was examined using scanning electron microscopy (SEM). Methods and materials: Superficial occlusal dentin of extracted human molars was exposed and finished with wet 800-grit silicon carbide paper. A block of composite resin was then bonded to the molar samples with the above adhesives according to the manufacturers' instructions. After 24 hours in water at 37 degrees C, the specimens were sectioned into 1 mm thick slices and divided into two regional subgroups according to their relationship to pulp tissue using visual criteria: pulp center and pulp periphery. The slices were then trimmed for the microtensile bond test and subjected to a tensile force and crosshead speed of 1 mm/min. Two-way analysis of variance was performed for statistical analyses. In addition the bond strengths for nine adhesive systems for each dentinal area were compared using the Post-Hoc test. The resin-dentin interfaces for each adhesive system were observed under a SEM. Results: Mean mu TBS ranged from (25.2 MPa) for TOSP to (48.9 MPa) for PBNT. The bond strengths of total-etch adhesive systems were not significantly different, and were higher than self-etch adhesive systems, except for CSEB (p<0.05). No significant regional difference was observed for all of the nine adhesive systems (p>0.05). SEM observation showed there is not a standard hybridization for adhesive systems. Conclusion: Different dentinal areas may not exhibit as great an influence on bond strengths using new adhesive systems.
The Journal of Contemporary Dental Practice, 2006
Objective The purpose of this study was to evaluate the microtensile bond strength (μ TBS) of four total-etch adhesives [Excite (EB), Prime & Bond NT (PBNT), Single Bond (SB), and One Coat Bond (OCB)] by comparing them to five self-etching adhesives (Clearfil SE Bond (CSEB), Xeno III (X III), Prompt L-Pop (PLP), AQ Bond (AQB), and Tyrian/One Step plus (TOSP)] at different dentinal areas. In addition the interface between the adhesive resins and dentin was examined using scanning electron microscopy (SEM). Methods and Materials Superficial occlusal dentin of extracted human molars was exposed and finished with wet 800-grit silicon carbide paper. A block of composite resin was then bonded to the molar samples with the above adhesives according to the manufacturers’ instructions. After 24 hours in water at 37°C, the specimens were sectioned into 1 mm thick slices and divided into two regional subgroups according to their relationship to pulp tissue using visual criteria: pulp center an...
Dentin bond strength and nanoleakage of the adhesive interface after intracoronal bleaching
Microscopy research and technique, 2018
This study evaluated dentin bond strength (BS) and nanoleakage of non- and pre-etched dentin immediately (T,), 7 days (T), and 14 days (T) after bleaching. Bovine incisors (150) were selected and half of them submitted to intrapulpal dentin etching (e). Non- and pre-etched dentin were subjected to the following (n = 15): no bleaching/control (C); 35% carbamide peroxide (CP); 35% hydrogen peroxide (35% HP); 25% hydrogen peroxide (25% HP); and sodium perborate (SP). Bleaching agents were applied to the pulp chamber four times within a 72-h interval. Afterwards, pulp chamber dentin was prepared for the BS test at different evaluation times (n = 5): T, T, and T. Composite blocks were built on pulp chamber and sectioned in slices. Slices were reduced to an hour-glass shape with a cross-sectional area of 0.8 mmand submitted to microtensile BS test. Two additional specimens for each group were prepared for nanoleakage evaluation by transmission electron microscopy (TEM). Results were analy...
Effect of acid etching on dentin bond strength of ultra-mild self-etch adhesives
International Journal of Adhesion and Adhesives, 2020
Background: Nowadays, most of the dental manufacturers claimed that 'Universal' or 'multi-mode' adhesives in self-etch technique can obtain good bonding results comparing to etch-and-rinse or selective etching application techniques. The rationale behind this study was that a multi-mode adhesive, when proven to be effective, would enable general practitioners to apply the adhesive using either an 'etch-and-rinse' or an 'self-etch' adhesive mode strategy, basically depending on their interpretation of what appears to be most appropriate upon examination of the actual cavity and the overall restoration conditions. Objective: This study examined the effect of acid etching on microtensile bond strength (μTBS), micromorpho-logical patterns of resin-dentin interface using scanning electron microscope (SEM) and SEM of tracer-infused water-rich zones within the hybrid layers of ultra-mild self-etch adhesives bonded to coronal dentin. Methods: Sixty extracted permanent molars were assigned into six groups based on μTBS (n ¼ 10). The groups were bonded with Adper single bond (SB) plus adhesive in etch-and-rinse mode and Adper easy one (EO) bond in self-etch mode as controls; Single Bond Universal self-etch (SUSe) and etch-and-rinse (SUEr); Adhese Universal self-etch (AUSe) and etch-and-rinse (AUEr). The bonded specimens were stored in deionized water for 24 h. Composite/dentin beams were prepared (1 mm 2). μTBS testing was performed. Micromorphological evaluation of extra teeth from each study group was conducted using SEM, and nanoleakage (NL) was evaluated. μTBS data were statistically analyzed using two-way ANOVA and multiple comparison post-hoc tests. Results: AUEr had the highest μTBS (p < 0.05). There was a significant difference in μTBS between AUEr and AUSe (p < 0.05). No significant difference was found in μTBS between SUSe and SUEr (p > 0.05). The μTBS for SUEr was similar to the SB control adhesive (p > 0.05), while the μTBS for SUSe was higher than the EO control adhesive (p < 0.05). A comparison of both materials showed that the μTBS was significantly higher for AUEr than SBEr (p < 0.05). The thickness of the hybrid layers created by these adhesives in the etch-and-rinse mode and the self-etch mode were approximately ~5 mm and �0.5 mm, respectively. Silver nitrate infused regions were identified within the resin-dentin interface in all the bonded specimens. Conclusion: Application of an etching step prior to water-based adhesive improves its dentin penetration, but it does not affect its μTBS; while application of an etching step prior to ethanol-based adhesive improves its dentin penetration and its μTBS.
Nigerian journal of clinical practice
This study investigated the effect of a re-wetting agent on the microtensile bond strengths (mTBS) of primary and permanent dentin after acid or laser etching. Twelve permanent and 12 primary molar teeth were ground to expose an occlusal dentin surface. Each group teeth were randomly divided into groups; I-II: 37% phosphoric acid etching with/without re-wetting agent, III-IV: Erbium: Yttrium aluminium garnet laser etching with/without re-wetting agent. An etch-and-rinse adhesive was used, and vertical sticks were obtained for the microtensile test. mTBS of permanent teeth was higher than that of primary teeth (P < 0.05). Re-wetting agent groups were similar with control groups in both etching groups in the permanent teeth (P > 0.05). Re-wetting agent group was similar with the control group in acid etch group (P > 0.05) and lower than the control group in laser etch group in primary teeth (P < 0.05). Acid etching in permanent teeth; laser etching in primary teeth was fou...
Polymers, 2022
The objective was to evaluate the influence of active bonding applications (ABA) for different time intervals after selective dentin etching (SDE) for 3 s on the microtensile bond strength (μTBS) to dentin of two universal adhesive systems (UAs): one containing 2-hydroxyethyl methacrylate (HEMA) (Scotchbond Universal, SBU), and one that was HEMA-free (Prime&Bond Universal, PBU). Dentin bovine specimens were divided into four groups: self-etch as control (SE), SDE + ABA for 15 s (SDE15), SDE + ABA for 20 s (SDE20), and SDE + ABA for 25 s (SDE25). The μTBS test was performed after a water storage of 24 h and 6 months. Scanning electron microscopy (SEM) was used in order to examine the resin–dentin interface. For the PBU, the µTBS was significantly influenced only by the aging factor (p < 0.026). A statistically significant decrease in the µTBS after 6 months of aging was observed only for the SDE15 group. For SBU, µTBS was significantly influenced by the protocol application and th...
BACKGROUND: The durability of dentin-resin interfaces with the universal adhesive system is a crucial characteristic with chemical interactions between the exposed collagen and the adhesive monomers, but it is still compromised with wet and dry mode. AIM: The present study evaluated the effect of dentin wetness and solvents containing of one-step self-etch adhesives on the microtensile bond strength (µTBS) of dentin at different storage times. METHODS: Occlusal dentin of 54 extracted human molars was exposed. Each adhesive agent was applied according to manufacturer instructions to wet and dry dentin surfaces. Composite resin was incrementally built up. Bond strengths to dentin were determined using the µTBS test after water storage for 24 h, 1 month, and 6 months. One-way ANOVA was used to compare between more than two non-related samples. The significance level was set at p ≤ 0.05. RESULTS: Dryness of dentin increases the µTBS with solvent-containing adhesives while decrease the µTBS with solvent-free adhesive. There was an increase in microtensile bond strength values in the case of ethanol waterbased self-etch adhesive over time. No statistically significant difference was found among different storage times regarding µTBS for solvent-free adhesive, while a statistically significant difference was found among different storage times in µTBS for solvent-containing adhesives. CONCLUSION: Universal adhesive systems improve the durability and stability of dentin bond strength.