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Masashi Miyazaki - One of the best experts on this subject based on the ideXlab platform.

  • Comparison of Dentin Bond durability of a universal adhesive and two etch-and-rinse adhesive systems
    Clinical Oral Investigations, 2019
    Co-Authors: Mami Kawazu, Akimasa Tsujimoto, Wayne W. Barkmeier, Toshiki Takamizawa, Mark A. Latta, Eizo Hirokane, Tomohiko Tamura, Masashi Miyazaki
    Abstract:

    Objective This study aimed to compare Dentin Bond durability under different degradation conditions between two etch-and-rinse (ER) systems and a universal adhesive in ER mode. Method This study used a universal adhesive [ScotchBond Universal (SU)], a three-step ER adhesive [ScotchBond Multi-Purpose Plus (SM)], and a two-step ER adhesive [Single Bond Plus (SB)]. A phosphoric acid-etching agent was applied to bovine Dentin prior to the application of either a primer or the adhesive. After acid etching, Bonding procedures were conducted. The specimens were divided into three group classes: (1) subjected to 10,000, 30,000, or 50,000 thermal cycles (TC); (2) stored in distilled water at 37 °C for 6 months or 1 year (WS); and (3) stored in distilled water for 24 h (baseline). Shear Bond strength (SBS) tests were conducted. Results SB showed a higher baseline SBS than the other adhesives. Defining the baseline SBS value for each adhesive system as 100%, TC groups ranged from 56.1 to 70.3% for SM, from 98.4 to 103.7% for SB, and from 120.3 to 126.7% for SU. WS groups ranged from 66.2 to 71.4% for SM, from 98.1 to 103.3% for SB, and from 102.5 to 118.1% for SU. Conclusions Although SB showed relatively stable Dentin Bond performance under all degradation conditions, SM showed decreased Dentin SBS with prolonged degradation. SU did not show any significant decrease in SBS from the baseline under any degradation condition. Clinical relevance The universal adhesive showed comparable adhesive performance with the two-step ER adhesive.

  • Influence of photoirradiation conditions on Dentin Bond durability and interfacial characteristics of universal adhesives.
    Dental Materials Journal, 2017
    Co-Authors: Kazutaka Hirai, Kie Nojiri, Akimasa Tsujimoto, Wayne W. Barkmeier, Toshiki Takamizawa, Mark A. Latta, Hirofumi Ueta, Masashi Miyazaki
    Abstract:

    : The influence of photoirradiation conditions on Dentin Bond durability and interfacial characteristics of universal adhesives was investigated. Universal adhesives were applied to the Dentin surfaces and photoirradiated with 100 mW/cm2 for 40 s, 200 mW/cm2 for 20 s, and 400 mW/cm2 for 10 s. A resin composite was Bonded to Dentin to determine shear Bond strength after 24 h water storage and 30,000 thermal cycles, and water contact angle of cured adhesive were measured by the sessile drop method. Greater Dentin Bond strengths after 24 h water storage and 30,000 thermal cycles were achieved under these conditions at light intensity exceeding 200 mW/cm2. Universal adhesives photoirradiated above 200 mW/cm2 exhibited significantly higher water contact angles than those at 100 mW/cm2. The results of this study suggested that the photoirradiation conditions affect the Dentin Bond durability and interfacial characteristics of universal adhesives even at the same total energy.

  • comparison between universal adhesives and two step self etch adhesives in terms of Dentin Bond fatigue durability in self etch mode
    European Journal of Oral Sciences, 2017
    Co-Authors: Akimasa Tsujimoto, Wayne W. Barkmeier, Toshiki Takamizawa, Mark A. Latta, Hidehiko Watanabe, William W Johnson, Masashi Miyazaki
    Abstract:

    This aim of this study was to compare universal adhesives and two-step self-etch adhesives in terms of Dentin Bond fatigue durability in self-etch mode. Three universal adhesives – Clearfil Universal, G-Premio Bond, and ScotchBond Universal Adhesive – and three-two-step self-etch adhesives – Clearfil SE Bond, Clearfil SE Bond 2, and OptiBond XTR – were used. The initial shear Bond strength and shear fatigue strength of resin composite Bonded to adhesive on Dentin in self-etch mode were determined. Scanning electron microscopy observations of fracture surfaces after Bond strength tests were also made. The initial shear Bond strength of universal adhesives was material dependent, unlike that of two-step self-etch adhesives. The shear fatigue strength of ScotchBond Universal Adhesive was not significantly different from that of two-step self-etch adhesives, unlike the other universal adhesives. The shear fatigue strength of universal adhesives differed depending on the type of adhesive, unlike those of two-step self-etch adhesives. The results of this study encourage the continued use of two-step self-etch adhesive over some universal adhesives but suggest that changes to the composition of universal adhesives may lead to a Dentin Bond fatigue durability similar to that of two-step self-etch adhesives.

  • Comparison of enamel Bond fatigue durability of universal adhesives and two-step self-etch adhesives in self-etch mode
    American Journal of Dentistry, 2017
    Co-Authors: Akimasa Tsujimoto, Hosoya Yumiko, Nagura Yuko, Kie Nojiri, Wayne W. Barkmeier, Toshiki Takamizawa, Mark A. Latta, Masashi Miyazaki
    Abstract:

    This aim of this study was to compare universal adhesives and two-step self-etch adhesives in terms of Dentin Bond fatigue durability in self-etch mode. Three universal adhesives - Clearfil Universal, G-Premio Bond, and ScotchBond Universal Adhesive - and three-two-step self-etch adhesives - Clearfil SE Bond, Clearfil SE Bond 2, and OptiBond XTR - were used. The initial shear Bond strength and shear fatigue strength of resin composite Bonded to adhesive on Dentin in self-etch mode were determined. Scanning electron microscopy observations of fracture surfaces after Bond strength tests were also made. The initial shear Bond strength of universal adhesives was material dependent, unlike that of two-step self-etch adhesives. The shear fatigue strength of ScotchBond Universal Adhesive was not significantly different from that of two-step self-etch adhesives, unlike the other universal adhesives. The shear fatigue strength of universal adhesives differed depending on the type of adhesive, unlike those of two-step self-etch adhesives. The results of this study encourage the continued use of two-step self-etch adhesive over some universal adhesives but suggest that changes to the composition of universal adhesives may lead to a Dentin Bond fatigue durability similar to that of two-step self-etch adhesives.

  • Influence of different smear layers on Bond durability of self-etch adhesives
    Dental Materials, 2017
    Co-Authors: Toshiki Takamizawa, Keiichi Sai, Arisa Imai, Robert L. Erickson, Akimasa Tsujimoto, Wayne W. Barkmeier, Mark A. Latta, Masashi Miyazaki
    Abstract:

    Objective: The purpose of this study was to determine the influence of different smear layers on enamel and Dentin Bond durability of various types of self-etch adhesives. Methods: Two universal adhesives, ScotchBond Universal (SU) and Prime & Bond elect (PE); a conventional single-step self-etch adhesive, G-ænial Bond (GB); and two two-step self-etch adhesives, OptiBond XTR (OX) and Clearfil SE Bond (SE) were used in this study. Shear Bond strengths (SBS) and shear fatigue strengths (SFS) to human enamel and Dentin were determined with different smear layer conditions. The prepared specimens were divided into three groups. The Bonding surfaces were prepared by grinding with either (1) #180, (2) #600, or (3) #4000-SiC papers before making the Bonded assemblies. For each group, 15 specimens were prepared for the SBS and 30 specimens for the SFS. Results: The two-step self-etch adhesives showed significantly higher SFS values than the single-step self-etch adhesives, regardless of the smear layer condition or substrate. Although most of the tested adhesives showed no significant differences in enamel SFS values among the smear layer groups, SU, GB, and SE showed significantly lower SFS values in the #180 in Dentin groups than the #600 and #4000 groups. Conclusion: The influence of different smear layer conditions on Bond durability was adhesive dependent. Furthermore, the smear layers generated on different substrates also influenced the Bond quality of the self-etch adhesives. Significance: Smear layer conditions of enamel and Dentin influence the Bond durability of universal adhesives and conventional single and two-step self-etch adhesives.

Junji Tagami - One of the best experts on this subject based on the ideXlab platform.

  • the effects of aging on shear Bond strength and nanoleakage expression of an etch and rinse adhesive on human enamel and Dentin
    Journal of Adhesive Dentistry, 2012
    Co-Authors: Ilnaz Hariri, Yasushi Shimada, Alireza Sadr, Shizuko Ichinose, Junji Tagami
    Abstract:

    PURPOSE: To evaluate the effects of increasing thermocycling regimens on Bond strength and nanoleakage of an etch-and-rinse adhesive. MATERIALS AND METHODS: Adper Single Bond (3M ESPE) was used for Bonding resin composite to human enamel and Dentin. Specimens were stored in water (37°C, 24 h) and subjected to thermocycling (5°C and 55°C) in five groups: 1. control (no thermal cycling), 2. 100, 3. 500, 4. 2000, or 5. 10,000 cycles. The microshear Bond test was performed at a crosshead speed of 1 mm/min (n = 16). Nanoleakage specimens were immersed in silver nitrate and FE-SEM micrographs were digitally analyzed to calculate silver penetration in three samples. RESULTS: The mean Bond strength to enamel was not significantly affected by thermocycling. However, artificial aging decreased Dentin Bond strength in groups 4 and 5 compared to control. Weibull analysis indicated that the characteristic strength decreased gradually with aging in both substrates. All groups exhibited some nanoleakage, and a significant increase in silver penetration compared to the control was observed in enamel and Dentin groups 2 to 5. CONCLUSION: A nanoleakage increase was detected in an earlier stage of aging than when a significant drop in Bond strength was observed, with the Dentin Bond being more susceptible to deterioration.

  • Effect of Er:YAG laser on Dentin Bonding durability under simulated pulpal pressure.
    The journal of adhesive dentistry, 2009
    Co-Authors: Ahmed Samir Bakry, Masatoshi Nakajima, Masayuki Otsuki, Junji Tagami
    Abstract:

    PURPOSE: To evaluate the effects of Er:YAG laser ablation on the microtensile Bond strength and the nanoleakage of Er:YAG-lased Dentin Bonded to a self-etching adhesive system with and without pulpal pressure.\n\nMATERIALS AND METHODS: Twenty flat Dentin surfaces were obtained from extracted molars. Ten specimens were irradiated by Er:YAG laser, other specimens (control group) were ground using #600 SiC paper. Direct communication to the pulp chamber was created by cutting at a level approximately 1 mm below the cementoenamel junction and parallel to the occlusal surface. The experimental groups were exposed to a simulated pulpal pressure of 15 cm H2O. Each specimen was restored using an adhesive and a photocured composite. The specimens were then sectioned vertically to obtain Dentin/adhesive slabs. Ninety-six slabs were prepared for microtensile Bond testing. Sixty-four slabs were immersed in ammoniacal silver nitrate tracer solution for 18 h, then rinsed thoroughly, and immersed in photodeveloping solution for 6 h prior to their examination by FE-SEM.\n\nRESULTS: The method of Dentin preparation and the pulpal pressure storage condition significantly affected the microTBS, while the storage duration did not (p < 0.05). The nanoleakage patterns observed in the Dentin/Bond interface differed depending on whether the Dentin was conventionally prepared or ablated by Er:YAG laser.\n\nCONCLUSION: Er:YAG laser ablation to Dentin adversely affected the microTBS and the sealing ability of SE Bond Bonded to Dentin under simulated pulpal condition.

  • effects of different burs on Dentin Bond strengths of self etching primer Bonding systems
    Operative Dentistry, 2001
    Co-Authors: Miwako Ogata, Masatoshi Nakajima, Patricia N R Pereira, Naoko Harada, Saori Yamaguchi, Junji Tagami
    Abstract:

    : This study evaluated the effects of cutting Dentin with different types of burs on tensile Bond strength using three self-etching primer Bonding systems (Clearfil Liner Bond 2 [LB2], Clearfil Liner Bond 2V [2V] and Clearfil SE Bond [SE], Kuraray, Co, Ltd, Osaka, Japan). Thirty-six intact extracted human third molars were ground flat to expose occlusal Dentin, followed by polishing the Dentin surfaces with #600 SiC paper. The teeth were divided into four groups according to bur type and grit: fine cut fissure steel bur (SB600), cross cut fissure steel bur (SB703), regular grit diamond bur (DB). Controls were abraded with #600 grit SiC paper (AP#600). The Dentin surfaces of the SB600, SB703 and DB groups were cut under copious air-water spray with the respective burs mounted in a dental handpiece. The teeth were treated with one of three adhesive systems, then composite buildups were created with Clearfil AP-X (Kuraray Co, Ltd, Osaka, Japan). After soaking in water at 37 degrees C for 24 hours, serial vertical sections (0.7 mm thick, 7-8 slices per one tooth) were made, trimmed to form an hour-glass shape with a 1.0 mm2 cross-section and tensile Bond strengths were determined at a cross-head speed of 1 mm/min. Statistical analysis was made using one and two-way ANOVA and Fisher's PLSD test (p SB600 > SB703 > DB. This ranking reached statistical significance using Clearfil Liner Bond 2V (p<0.05). Therefore, when cutting Dentin, selecting the adequate bur type is important for improved Bonding of adhesive systems using self-etching primer to Dentin.

  • the influence of storage solution on Dentin Bond durability of resin cement
    Dental Materials, 2000
    Co-Authors: Yuichi Kitasako, M F Burrow, Toru Nikaido, Junji Tagami
    Abstract:

    Abstract Objectives: This study was conducted to determine the influence of storage solution on the Bond durability of three resin cements to bovine Dentin over the period of 1 year. Methods: Ten bovine Dentin specimens were tested for shear Bond strength with each material (Panavia 21, Kuraray Co.; BISTITE, Tokuyama Co; MASA Bond, Sun Medical Co.) and storage mode, listed below. Four storage environments were studied as follows: water changed every day for 1 year; water unchanged for 1 year; Phosphate Buffered Saline (PBS) changed every week over 1 year; PBS unchanged for 1 year. Ten teeth were also tested for each material at 1 day as a control. The mode of failure was classified after fracture of the Bonds by SEM observation. The means of the Bond strengths were compared statistically by two-way ANOVA and Fisher's PLSD test ( p U test. Results: Although there was no statistical difference in the mean Bond strengths between the water and PBS storage solutions ( p >0.05) in all cements, the results for the shear Bond strengths in the changed storage solution groups were significantly lower than those where the storage solution remained unchanged ( p p Significance: The storage condition influenced the long-term durability of Dentin Bonding with resin cements.

  • effect of intrinsic wetness and regional difference on Dentin Bond strength
    Dental Materials, 1999
    Co-Authors: Patricia N R Pereira, Hidehiko Sano, Mamiko Okuda, Takako Yoshikawa, M F Burrow, Junji Tagami
    Abstract:

    Abstract Objectives: The aim of this investigation was to determine the influence of intrinsic wetness on regional Bond strengths of adhesive resins to Dentin. Methods: Human caries-free third molars were randomly divided into three groups for Bonding: Group 1—no pulpal pressure; Group 2—pulpal pressure of 15 cm H 2 O; and Group 3—Dentin dried overnight in a desiccator. Clearfil Liner Bond II (Kuraray) or One Step (Bisco) adhesive resins systems were applied to the flat Dentin surfaces and the teeth were restored with APX resin composite (Kuraray). After 24 h in water at 37°C, the specimens were sectioned into 0.7 mm thick slabs and divided into three regional subgroups according to the remaining Dentin thickness and visual criteria: pulp horn, center, and periphery. The slabs were then trimmed for the micro-tensile Bond test and subjected to a tensile force and crosshead of 1 mm/min. The data were analyzed with ANOVA and Fisher's PLSD test at a confidence level of 95%. The fracture modes were determined under a scanning electron microscope (JXA-840, JEOL, Japan). Results: No significant regional difference was observed for the Group 1 and 2 specimens restored with Clearfil Liner Bond II ( p >0.05). However, Bond strengths significantly decreased at the pulp horn region of the Group 1 and 2 specimens restored with One Step ( p p >0.05). Significance: The Dentin adhesive system should be chosen according to the substrate and region to be Bonded, since Bond strengths can vary according to the intrinsic wetness, region, and the adhesive system.

Toshiki Takamizawa - One of the best experts on this subject based on the ideXlab platform.

  • Comparison of Dentin Bond durability of a universal adhesive and two etch-and-rinse adhesive systems
    Clinical Oral Investigations, 2019
    Co-Authors: Mami Kawazu, Akimasa Tsujimoto, Wayne W. Barkmeier, Toshiki Takamizawa, Mark A. Latta, Eizo Hirokane, Tomohiko Tamura, Masashi Miyazaki
    Abstract:

    Objective This study aimed to compare Dentin Bond durability under different degradation conditions between two etch-and-rinse (ER) systems and a universal adhesive in ER mode. Method This study used a universal adhesive [ScotchBond Universal (SU)], a three-step ER adhesive [ScotchBond Multi-Purpose Plus (SM)], and a two-step ER adhesive [Single Bond Plus (SB)]. A phosphoric acid-etching agent was applied to bovine Dentin prior to the application of either a primer or the adhesive. After acid etching, Bonding procedures were conducted. The specimens were divided into three group classes: (1) subjected to 10,000, 30,000, or 50,000 thermal cycles (TC); (2) stored in distilled water at 37 °C for 6 months or 1 year (WS); and (3) stored in distilled water for 24 h (baseline). Shear Bond strength (SBS) tests were conducted. Results SB showed a higher baseline SBS than the other adhesives. Defining the baseline SBS value for each adhesive system as 100%, TC groups ranged from 56.1 to 70.3% for SM, from 98.4 to 103.7% for SB, and from 120.3 to 126.7% for SU. WS groups ranged from 66.2 to 71.4% for SM, from 98.1 to 103.3% for SB, and from 102.5 to 118.1% for SU. Conclusions Although SB showed relatively stable Dentin Bond performance under all degradation conditions, SM showed decreased Dentin SBS with prolonged degradation. SU did not show any significant decrease in SBS from the baseline under any degradation condition. Clinical relevance The universal adhesive showed comparable adhesive performance with the two-step ER adhesive.

  • Influence of photoirradiation conditions on Dentin Bond durability and interfacial characteristics of universal adhesives.
    Dental Materials Journal, 2017
    Co-Authors: Kazutaka Hirai, Kie Nojiri, Akimasa Tsujimoto, Wayne W. Barkmeier, Toshiki Takamizawa, Mark A. Latta, Hirofumi Ueta, Masashi Miyazaki
    Abstract:

    : The influence of photoirradiation conditions on Dentin Bond durability and interfacial characteristics of universal adhesives was investigated. Universal adhesives were applied to the Dentin surfaces and photoirradiated with 100 mW/cm2 for 40 s, 200 mW/cm2 for 20 s, and 400 mW/cm2 for 10 s. A resin composite was Bonded to Dentin to determine shear Bond strength after 24 h water storage and 30,000 thermal cycles, and water contact angle of cured adhesive were measured by the sessile drop method. Greater Dentin Bond strengths after 24 h water storage and 30,000 thermal cycles were achieved under these conditions at light intensity exceeding 200 mW/cm2. Universal adhesives photoirradiated above 200 mW/cm2 exhibited significantly higher water contact angles than those at 100 mW/cm2. The results of this study suggested that the photoirradiation conditions affect the Dentin Bond durability and interfacial characteristics of universal adhesives even at the same total energy.

  • comparison between universal adhesives and two step self etch adhesives in terms of Dentin Bond fatigue durability in self etch mode
    European Journal of Oral Sciences, 2017
    Co-Authors: Akimasa Tsujimoto, Wayne W. Barkmeier, Toshiki Takamizawa, Mark A. Latta, Hidehiko Watanabe, William W Johnson, Masashi Miyazaki
    Abstract:

    This aim of this study was to compare universal adhesives and two-step self-etch adhesives in terms of Dentin Bond fatigue durability in self-etch mode. Three universal adhesives – Clearfil Universal, G-Premio Bond, and ScotchBond Universal Adhesive – and three-two-step self-etch adhesives – Clearfil SE Bond, Clearfil SE Bond 2, and OptiBond XTR – were used. The initial shear Bond strength and shear fatigue strength of resin composite Bonded to adhesive on Dentin in self-etch mode were determined. Scanning electron microscopy observations of fracture surfaces after Bond strength tests were also made. The initial shear Bond strength of universal adhesives was material dependent, unlike that of two-step self-etch adhesives. The shear fatigue strength of ScotchBond Universal Adhesive was not significantly different from that of two-step self-etch adhesives, unlike the other universal adhesives. The shear fatigue strength of universal adhesives differed depending on the type of adhesive, unlike those of two-step self-etch adhesives. The results of this study encourage the continued use of two-step self-etch adhesive over some universal adhesives but suggest that changes to the composition of universal adhesives may lead to a Dentin Bond fatigue durability similar to that of two-step self-etch adhesives.

  • Comparison of enamel Bond fatigue durability of universal adhesives and two-step self-etch adhesives in self-etch mode
    American Journal of Dentistry, 2017
    Co-Authors: Akimasa Tsujimoto, Hosoya Yumiko, Nagura Yuko, Kie Nojiri, Wayne W. Barkmeier, Toshiki Takamizawa, Mark A. Latta, Masashi Miyazaki
    Abstract:

    This aim of this study was to compare universal adhesives and two-step self-etch adhesives in terms of Dentin Bond fatigue durability in self-etch mode. Three universal adhesives - Clearfil Universal, G-Premio Bond, and ScotchBond Universal Adhesive - and three-two-step self-etch adhesives - Clearfil SE Bond, Clearfil SE Bond 2, and OptiBond XTR - were used. The initial shear Bond strength and shear fatigue strength of resin composite Bonded to adhesive on Dentin in self-etch mode were determined. Scanning electron microscopy observations of fracture surfaces after Bond strength tests were also made. The initial shear Bond strength of universal adhesives was material dependent, unlike that of two-step self-etch adhesives. The shear fatigue strength of ScotchBond Universal Adhesive was not significantly different from that of two-step self-etch adhesives, unlike the other universal adhesives. The shear fatigue strength of universal adhesives differed depending on the type of adhesive, unlike those of two-step self-etch adhesives. The results of this study encourage the continued use of two-step self-etch adhesive over some universal adhesives but suggest that changes to the composition of universal adhesives may lead to a Dentin Bond fatigue durability similar to that of two-step self-etch adhesives.

  • Influence of different smear layers on Bond durability of self-etch adhesives
    Dental Materials, 2017
    Co-Authors: Toshiki Takamizawa, Keiichi Sai, Arisa Imai, Robert L. Erickson, Akimasa Tsujimoto, Wayne W. Barkmeier, Mark A. Latta, Masashi Miyazaki
    Abstract:

    Objective: The purpose of this study was to determine the influence of different smear layers on enamel and Dentin Bond durability of various types of self-etch adhesives. Methods: Two universal adhesives, ScotchBond Universal (SU) and Prime & Bond elect (PE); a conventional single-step self-etch adhesive, G-ænial Bond (GB); and two two-step self-etch adhesives, OptiBond XTR (OX) and Clearfil SE Bond (SE) were used in this study. Shear Bond strengths (SBS) and shear fatigue strengths (SFS) to human enamel and Dentin were determined with different smear layer conditions. The prepared specimens were divided into three groups. The Bonding surfaces were prepared by grinding with either (1) #180, (2) #600, or (3) #4000-SiC papers before making the Bonded assemblies. For each group, 15 specimens were prepared for the SBS and 30 specimens for the SFS. Results: The two-step self-etch adhesives showed significantly higher SFS values than the single-step self-etch adhesives, regardless of the smear layer condition or substrate. Although most of the tested adhesives showed no significant differences in enamel SFS values among the smear layer groups, SU, GB, and SE showed significantly lower SFS values in the #180 in Dentin groups than the #600 and #4000 groups. Conclusion: The influence of different smear layer conditions on Bond durability was adhesive dependent. Furthermore, the smear layers generated on different substrates also influenced the Bond quality of the self-etch adhesives. Significance: Smear layer conditions of enamel and Dentin influence the Bond durability of universal adhesives and conventional single and two-step self-etch adhesives.

Alessandra Reis - One of the best experts on this subject based on the ideXlab platform.

  • Effect of sonic application mode on the resin-Dentin Bond strength and Dentin permeability of self-etching systems.
    Journal of Adhesive Dentistry, 2014
    Co-Authors: Alexandra Mena-serrano, Alessandro Dourado Loguercio, Costa Tr, Rafael Tiago Patzlaff, Alessandra Reis
    Abstract:

    To compare manual and sonic adhesive application modes in terms of the permeability and microtensile Bond strength of a self-etching adhesive applied in the one-step or two-step protocol. Self-etching All Bond SE (Bisco) was applied as a one- or a two-step adhesive under manual or sonic vibration modes on flat occlusal Dentin surfaces of 64 human molars. Half of the teeth were used to measure the hydraulic conductance of Dentin at 200 cm H₂O hydrostatic pressure for 5 min immediately after the adhesive application. In the other half, composite buildups (Opallis) were constructed incrementally to create resin-Dentin sticks with a cross-sectional area of 0.8 mm² to be tested in tension (0.5 mm/min) immediately after restoration placement. Data were analyzed using a two-way ANOVA and Tukey's test (α = 0.05). The fluid conductance of Dentin was significantly reduced by the sonic vibration mode for both adhesives, but no effect on the Bond strength values was observed for either adhesive. The sonic application mode at an oscillating frequency of 170 Hz can reduce the fluid conductance of the one- and two-step All Bond SE adhesive when applied on Dentin.

  • correlation between degree of conversion resin Dentin Bond strength and nanoleakage of simplified etch and rinse adhesives
    Dental Materials, 2013
    Co-Authors: Viviane Hass, Alessandro Dourado Loguercio, Max Dobrovolski, Christiana Zandergrande, Gislaine Cristine Martins, Luis Alfonso Arana Gordillo, Maria De Lourdes Rodrigues Accorinte, Osnara Maria Mongruel Gomes, Alessandra Reis
    Abstract:

    OBJECTIVES: The aim of this study was to correlate the degree of conversion measured inside the hybrid layer (DC) with the microtensile resin-Dentin Bond strength (μTBS) and silver nitrate uptake or nanoleakage (SNU) for five simplified etch-and-rinse adhesive systems. METHODS: Fifty-five caries free extracted molars were used in this study. Thirty teeth were used for μTBS/SNU [n=6] and 25 teeth for DC [n=5]. The Dentin surfaces were Bonded with the following adhesives: Adper Single Bond 2 (SB), Ambar (AB), XP Bond (XP), Tetric N-Bond (TE) and Stae (ST) followed by composite resin build-ups. For μTBS and SNU test, Bonded teeth were sectioned in order to obtain stick-shaped specimens (0.8mm(2)), which were tested under tensile stress (0.5mm/min). Three Bonded sticks, from each tooth, were not tested in tensile stress and they were immersed in 50% silver nitrate, photo-developed and analyzed by scanning electron microscopy. Longitudinal 1-mm thick sections were prepared for the teeth assigned for DC measurement and evaluated by micro-Raman spectroscopy. RESULTS: ST showed lowest DC, μTBS, and higher SNU (p 0.05), except for TE which showed an intermediate SNU level. The DC was positively correlated with μTBS and negatively correlated with SNU (p<0.05). SNU was also negatively correlated with μTBS (p<0.05). SIGNIFICANCE: The measurement of DC inside the hybrid layer can provide some information about Bonding performance of adhesive systems since this property showed a good correlation with resin-Dentin Bond strength and SNU values.

  • Effect of sonic application mode on the resin–Dentin Bond strength and nanoleakage of simplified self-etch adhesive
    Clinical Oral Investigations, 2013
    Co-Authors: Alexandra Mena-serrano, Alessandro Dourado Loguercio, Eugenio Jose Garcia, Alessandra Reis
    Abstract:

    Objectives This study aims to evaluate the effect of different application modes on the immediate and 6-month resin–Dentin Bond strength (μTBS) and nanoleakage in the hybrid and adhesive layers.

  • Influence of ozone gas and ozonated water application to Dentin and Bonded interfaces on resin-Dentin Bond strength.
    Journal of Adhesive Dentistry, 2012
    Co-Authors: Eugenio Jose Garcia, Alessandra Reis, Alexandra Patricia Mena Serrano, Wilfredo Irrazabal Urruchi, Maria Cristina Zindel Deboni, Rosa Helena Miranda Grande, Alessandro Dourado Loguercio
    Abstract:

    PURPOSE: To assess the influence of ozone gas and ozonated water application to prepared cavity and Bonded interfaces on the resin/Dentin Bond strength of two-step etch-and-rinse adhesive systems (Adper Single Bond 2 [SB2] and XP-Bond [XP]). MATERIALS AND METHODS: Sixty extracted human third molars were sectioned perpendicularly to their long axes to expose flat occlusal Dentin surfaces. In experiment 1, Dentin was treated with ozone before the Bonding procedure, while in experiment 2, ozone was applied to resin/Dentin Bonded interfaces. In experiment 1, Dentin surfaces were treated either with ozone gas (2100 ppm), ozonated water (3.5 ppm), or distilled water for 120 s, and then Bonded with SB2 or XP according to manufacturers' instructions. Hybrid composite buildups were incrementally constructed and the teeth were sectioned into resin-Dentin sticks (0.8 mm2). In experiment 2, Dentin surfaces were first Bonded with SB2 or XP, composite buildups were constructed, and Bonded sticks obtained. The sticks were treated with ozone as previously described. Bonded sticks were tested under tensile stress at 1 mm/min. Silver nitrate impregnation along the resin/Dentin interfaces was also evaluated under SEM. RESULTS: Two-way ANOVA (adhesive and ozone treatment) detected no significant effect for the cross-product interaction and the main factors in the two experiments (p > 0.05), which was confirmed by the photomicrographs. CONCLUSION: Ozone gas and ozonated water used before the Bonding procedure or on resin/Dentin Bonded interfaces have no deleterious effects on the Bond strengths and interfaces.

  • influence of chlorhexidine digluconate concentration and application time on resin Dentin Bond strength durability
    European Journal of Oral Sciences, 2009
    Co-Authors: Alessandro Dourado Loguercio, Rodrigo Stanislawczuk, Luceli Grabicoski Polli, Jully Anna Da Costa, Milton Domingos Michel, Alessandra Reis
    Abstract:

    : Although it is known that chlorhexidine application may preserve resin-Dentin Bonds from degradation, the lowest optimal concentration and application time have yet to be established. This study evaluated the effects of different concentrations of chlorhexidine digluconate and different application times on the preservation of resin-Dentin Bonds formed using two etch-and-rinse adhesives. In experiment 1, after acid etching, the occlusal demineralized Dentin was rewetted either with water or with 0.002, 0.02, 0.2, 2, or 4% chlorhexidine for 60 s. In experiment 2, the surfaces were rewetted with water, or with 0.002% or 2% chlorhexidine for 15 or 60 s. After this, both adhesives and composite resin were applied and light-cured. Bonded sticks (0.8 mm(2)) were tested under tension (0.5 mm min(-1)) immediately or after 6 months of storage in water. Two Bonded sticks from each tooth were immersed in silver nitrate and analyzed quantitatively using scanning electron microscopy. Reductions in microtensile Bond strengths and higher silver nitrate uptake were observed for both adhesives when the rewetting procedure was performed with water. Stable Bonds were maintained for up to 6 months under all chlorhexidine conditions tested, irrespective of the chlorhexidine concentration and application time. The use of 0.002% chlorhexidine for 15 s seems to be sufficient to preserve resin-Dentin interfaces over a 6-month period.

Mark A. Latta - One of the best experts on this subject based on the ideXlab platform.

  • Comparison of Dentin Bond durability of a universal adhesive and two etch-and-rinse adhesive systems
    Clinical Oral Investigations, 2019
    Co-Authors: Mami Kawazu, Akimasa Tsujimoto, Wayne W. Barkmeier, Toshiki Takamizawa, Mark A. Latta, Eizo Hirokane, Tomohiko Tamura, Masashi Miyazaki
    Abstract:

    Objective This study aimed to compare Dentin Bond durability under different degradation conditions between two etch-and-rinse (ER) systems and a universal adhesive in ER mode. Method This study used a universal adhesive [ScotchBond Universal (SU)], a three-step ER adhesive [ScotchBond Multi-Purpose Plus (SM)], and a two-step ER adhesive [Single Bond Plus (SB)]. A phosphoric acid-etching agent was applied to bovine Dentin prior to the application of either a primer or the adhesive. After acid etching, Bonding procedures were conducted. The specimens were divided into three group classes: (1) subjected to 10,000, 30,000, or 50,000 thermal cycles (TC); (2) stored in distilled water at 37 °C for 6 months or 1 year (WS); and (3) stored in distilled water for 24 h (baseline). Shear Bond strength (SBS) tests were conducted. Results SB showed a higher baseline SBS than the other adhesives. Defining the baseline SBS value for each adhesive system as 100%, TC groups ranged from 56.1 to 70.3% for SM, from 98.4 to 103.7% for SB, and from 120.3 to 126.7% for SU. WS groups ranged from 66.2 to 71.4% for SM, from 98.1 to 103.3% for SB, and from 102.5 to 118.1% for SU. Conclusions Although SB showed relatively stable Dentin Bond performance under all degradation conditions, SM showed decreased Dentin SBS with prolonged degradation. SU did not show any significant decrease in SBS from the baseline under any degradation condition. Clinical relevance The universal adhesive showed comparable adhesive performance with the two-step ER adhesive.

  • Influence of photoirradiation conditions on Dentin Bond durability and interfacial characteristics of universal adhesives.
    Dental Materials Journal, 2017
    Co-Authors: Kazutaka Hirai, Kie Nojiri, Akimasa Tsujimoto, Wayne W. Barkmeier, Toshiki Takamizawa, Mark A. Latta, Hirofumi Ueta, Masashi Miyazaki
    Abstract:

    : The influence of photoirradiation conditions on Dentin Bond durability and interfacial characteristics of universal adhesives was investigated. Universal adhesives were applied to the Dentin surfaces and photoirradiated with 100 mW/cm2 for 40 s, 200 mW/cm2 for 20 s, and 400 mW/cm2 for 10 s. A resin composite was Bonded to Dentin to determine shear Bond strength after 24 h water storage and 30,000 thermal cycles, and water contact angle of cured adhesive were measured by the sessile drop method. Greater Dentin Bond strengths after 24 h water storage and 30,000 thermal cycles were achieved under these conditions at light intensity exceeding 200 mW/cm2. Universal adhesives photoirradiated above 200 mW/cm2 exhibited significantly higher water contact angles than those at 100 mW/cm2. The results of this study suggested that the photoirradiation conditions affect the Dentin Bond durability and interfacial characteristics of universal adhesives even at the same total energy.

  • comparison between universal adhesives and two step self etch adhesives in terms of Dentin Bond fatigue durability in self etch mode
    European Journal of Oral Sciences, 2017
    Co-Authors: Akimasa Tsujimoto, Wayne W. Barkmeier, Toshiki Takamizawa, Mark A. Latta, Hidehiko Watanabe, William W Johnson, Masashi Miyazaki
    Abstract:

    This aim of this study was to compare universal adhesives and two-step self-etch adhesives in terms of Dentin Bond fatigue durability in self-etch mode. Three universal adhesives – Clearfil Universal, G-Premio Bond, and ScotchBond Universal Adhesive – and three-two-step self-etch adhesives – Clearfil SE Bond, Clearfil SE Bond 2, and OptiBond XTR – were used. The initial shear Bond strength and shear fatigue strength of resin composite Bonded to adhesive on Dentin in self-etch mode were determined. Scanning electron microscopy observations of fracture surfaces after Bond strength tests were also made. The initial shear Bond strength of universal adhesives was material dependent, unlike that of two-step self-etch adhesives. The shear fatigue strength of ScotchBond Universal Adhesive was not significantly different from that of two-step self-etch adhesives, unlike the other universal adhesives. The shear fatigue strength of universal adhesives differed depending on the type of adhesive, unlike those of two-step self-etch adhesives. The results of this study encourage the continued use of two-step self-etch adhesive over some universal adhesives but suggest that changes to the composition of universal adhesives may lead to a Dentin Bond fatigue durability similar to that of two-step self-etch adhesives.

  • Comparison of enamel Bond fatigue durability of universal adhesives and two-step self-etch adhesives in self-etch mode
    American Journal of Dentistry, 2017
    Co-Authors: Akimasa Tsujimoto, Hosoya Yumiko, Nagura Yuko, Kie Nojiri, Wayne W. Barkmeier, Toshiki Takamizawa, Mark A. Latta, Masashi Miyazaki
    Abstract:

    This aim of this study was to compare universal adhesives and two-step self-etch adhesives in terms of Dentin Bond fatigue durability in self-etch mode. Three universal adhesives - Clearfil Universal, G-Premio Bond, and ScotchBond Universal Adhesive - and three-two-step self-etch adhesives - Clearfil SE Bond, Clearfil SE Bond 2, and OptiBond XTR - were used. The initial shear Bond strength and shear fatigue strength of resin composite Bonded to adhesive on Dentin in self-etch mode were determined. Scanning electron microscopy observations of fracture surfaces after Bond strength tests were also made. The initial shear Bond strength of universal adhesives was material dependent, unlike that of two-step self-etch adhesives. The shear fatigue strength of ScotchBond Universal Adhesive was not significantly different from that of two-step self-etch adhesives, unlike the other universal adhesives. The shear fatigue strength of universal adhesives differed depending on the type of adhesive, unlike those of two-step self-etch adhesives. The results of this study encourage the continued use of two-step self-etch adhesive over some universal adhesives but suggest that changes to the composition of universal adhesives may lead to a Dentin Bond fatigue durability similar to that of two-step self-etch adhesives.

  • Influence of different smear layers on Bond durability of self-etch adhesives
    Dental Materials, 2017
    Co-Authors: Toshiki Takamizawa, Keiichi Sai, Arisa Imai, Robert L. Erickson, Akimasa Tsujimoto, Wayne W. Barkmeier, Mark A. Latta, Masashi Miyazaki
    Abstract:

    Objective: The purpose of this study was to determine the influence of different smear layers on enamel and Dentin Bond durability of various types of self-etch adhesives. Methods: Two universal adhesives, ScotchBond Universal (SU) and Prime & Bond elect (PE); a conventional single-step self-etch adhesive, G-ænial Bond (GB); and two two-step self-etch adhesives, OptiBond XTR (OX) and Clearfil SE Bond (SE) were used in this study. Shear Bond strengths (SBS) and shear fatigue strengths (SFS) to human enamel and Dentin were determined with different smear layer conditions. The prepared specimens were divided into three groups. The Bonding surfaces were prepared by grinding with either (1) #180, (2) #600, or (3) #4000-SiC papers before making the Bonded assemblies. For each group, 15 specimens were prepared for the SBS and 30 specimens for the SFS. Results: The two-step self-etch adhesives showed significantly higher SFS values than the single-step self-etch adhesives, regardless of the smear layer condition or substrate. Although most of the tested adhesives showed no significant differences in enamel SFS values among the smear layer groups, SU, GB, and SE showed significantly lower SFS values in the #180 in Dentin groups than the #600 and #4000 groups. Conclusion: The influence of different smear layer conditions on Bond durability was adhesive dependent. Furthermore, the smear layers generated on different substrates also influenced the Bond quality of the self-etch adhesives. Significance: Smear layer conditions of enamel and Dentin influence the Bond durability of universal adhesives and conventional single and two-step self-etch adhesives.