Restorative Dentistry & Endodontics

Antibacterial effect of self-etching adhesive systems on Streptococcus mutans: Seung-Ryong Kim, Dong-Hoon Shin; Restor Dent Endod 2014;39(1):32-38. Published online January 20, 2014; DOI: https://doi.org/10.5395/rde.2014.39.1.32

Abstract PDF PubReader ePub: Objectives
In this study, we evaluated the antibacterial activity of self-etching adhesive systems against Streptococcus mutans using the agar diffusion method.
Materials and Methods
Three 2-step systems, Clearfil SE Bond (SE, Kuraray), Contax (CT, DMG), and Unifil Bond (UnB, GC), and three 1-step systems, Easy Bond (EB, 3M ESPE), U-Bond (UB, Vericom), and All Bond SE (AB, BISCO) were used. 0.12% chlorhexidine (CHX, Bukwang) and 37% phosphoric acid gel (PA, Vericom) were used as positive controls.
Results
The antibacterial activity of CHX and PA was stronger than that of the other groups, except SE. After light activation, the inhibition zone was reduced in the case of all 2-step systems except CT. However, all 1-step systems did not exhibit any inhibition zone upon the light activation.
Conclusions
SE may be better than CT or UnB among the 2-step systems with respect to antibacterial activity, however, 1-step systems do not exhibit any antibacterial activity after light curing.

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Microshear bond strength of a flowable resin to enamel according to the different adhesive systems: Jeong-Ho Kim, Young-Gon Cho; J Korean Acad Conserv Dent 2011;36(1):50-58. Published online January 31, 2011; DOI: https://doi.org/10.5395/JKACD.2011.36.1.50

Abstract PDF PubReader ePub: Objectives
The purpose of this study was to compare the microshear bond strength (uSBS) of two total-etch and four self-etch adhesive systems and a flowable resin to enamel.
Materials and Methods
Enamels of sixty human molars were used. They were divided into one of six equal groups (n = 10) by adhesives used; OS group (One-Step Plus), SB group (Single Bond), CE group (Clearfil SE Bond), TY group (Tyrian SPE/One-Step Plus), AP group (Adper Prompt L-Pop) and GB group (G-Bond).

After enamel surfaces were treated with six adhesive systems, a flowable composite resin (Filek Z 350) was bonded to enamel surface using Tygon tubes. the bonded specimens were subjected to uSBS testing and the failure modes of each group were observed under FE-SEM.
Results
1. The uSBS of SB group was statistically higher than that of all other groups, and the uSBS of OS, SE and AP group was statistically higher than that of TY and GB group (p < 0.05).

2. The uSBS for TY group was statistically higher than that for GB group (p < 0.05).

3. Adhesive failures in TY and GB group and mixed failures in SB group and SE group were often analysed. One cohesive failure was observed in OS, SB, SE and AP group, respectively.
Conclusions
Although adhesives using the same step were applied the enamel surface, the uSBS of a flowable resin to enamel was different.

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Microleakage of 2-step adhesive systems in diamond-prepared cavity: Myung-Goo Lee, Kwon-Hwan Cho, Young-Gon Cho; J Korean Acad Conserv Dent 2007;32(5):437-444. Published online September 30, 2007; DOI: https://doi.org/10.5395/JKACD.2007.32.5.437

The purpose of this study was to compare the marginal microleakage of different 2-step adhesive systems in Class V cavities prepared with different diamond points.

Forty Class V cavities were prepared with two different (coarse or fine) diamond points on cervical third of extracted molars. The occlusal and gingival margin of cavities was located in enamel and dentin, respectively. They were divided into one of four equal groups (n = 10) and ; Group 1-prepared with coarse diamond point (EX-41), restored with Single Bond and Z 250, Group 2-prepared with fine diamond piont (TF-21F), restored with Single Bond and Z 250, Group 3-prepared with coarse diamond point (EX-41), restored with Clearfil SE Bond and Clearfil AP-X, Group 4-prepared with fine diamond point (TF-21F), restored with Clearfil SE Bond and Clearfil AP-X.

Specimens were thermocycled, immersed in a 2% methylene blue solution for 24 hours, and bisected longitudinally. They were observed leakages at enamel and dentinal margins. Data were analyzed using Mann-Whitney and Wilcoxon signed ranked test.

In this study, marginal microleakage of Single Bond was not affected by type of diamond points. But Clearfil SE Bond showed higher marginal microleakage at both enamel and dentinal margin when Class V cavity was prepared with coarse diamond point.

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INFLUENCE OF APPICATION TIME OF SELF-ETCHING PRIMERS ON DENTINAL MICROTENSILE BOND STRENGTH: Young-Gon Cho, Young-Gon Lee, Jong-Uk Kim, Byung-Cheul Park, Jong-Jin Kim, Hee-Young Choi, Cheul-Hee Jin, Sang-Hoon Yoo; J Korean Acad Conserv Dent 2004;29(5):430-438. Published online January 14, 2004; DOI: https://doi.org/10.5395/JKACD.2004.29.5.430

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ABSTRACT

This study evaluated the influence of application time of self-etching primers on microtensile bond strength (μTBS) to dentin using three self-etching primer adhesive systems.

Dentin surfaces were exposed from forty-eight human molars. They were conditioned with three self-etching primers (Clearfil SE Bond [SE], Unifil Bond [UF], Tyrian SPE + One Step Plus [TY]) and different primining times (10s, 20s, 30s and 40s). Composite resins were bonded to dentin surfaces and specimens were made. μTBS was tested and statistically compared using by one-way ANOVA and Tukey’s Test.

The results of this study presented that priming time for 10s in SE and UF groups and for 30s and 40s in TY group was highly decreased μTBS to dentin.

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