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Effect of moisture and drying time on the bond strength of the one-step self-etching adhesive system.

Lee Y, Park JW - Restor Dent Endod (2012)

Bottom Line: The dentin surface was either blot-dried or air-dried before applying these adhesive agents.Composite resin was build up to 4 mm thickness and light cured for 40 sec with 2 separate layers.Then the tooth was sectioned and trimmed to measure the microtensile bond strength using a universal testing machine.

View Article: PubMed Central - PubMed

Affiliation: Department of Conservative Dentistry, Yonsei University Wonju College of Medicine, Wonju, Korea.

ABSTRACT

Objectives: To investigate the effect of dentin moisture degree and air-drying time on dentin-bond strength of two different one-step self-etching adhesive systems.

Materials and methods: Twenty-four human third molars were used for microtensile bond strength testing of G-Bond and Clearfil S(3) Bond. The dentin surface was either blot-dried or air-dried before applying these adhesive agents. After application of the adhesive agent, three different air drying times were evaluated: 1, 5, and 10 sec. Composite resin was build up to 4 mm thickness and light cured for 40 sec with 2 separate layers. Then the tooth was sectioned and trimmed to measure the microtensile bond strength using a universal testing machine. The measured bond strengths were analyzed with three-way ANOVA and regression analysis was done (p = 0.05).

Results: All three factors, materials, dentin wetness and air drying time, showed significant effect on the microtensile bond strength. Clearfil S(3) Bond, dry dentin surface and 10 sec air drying time showed higher bond strength.

Conclusions: Within the limitation of this experiment, air drying time after the application of the one-step self-etching adhesive agent was the most significant factor affecting the bond strength, followed by the material difference and dentin moisture before applying the adhesive agent.

No MeSH data available.


Related in: MedlinePlus

The schematic view of the experimental design. Wetness of the tooth surface was divided into dry and blot dry groups and drying times after adhesive application were into 1, 5 and 10 seconds groups for each adhesive agent.
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Figure 1: The schematic view of the experimental design. Wetness of the tooth surface was divided into dry and blot dry groups and drying times after adhesive application were into 1, 5 and 10 seconds groups for each adhesive agent.

Mentions: Two adhesive systems were used in this experiment (Table 1). Before the application of the adhesive agents, the tooth surface of one group was dried with a strong air blow at 2 cm away from the tooth surface and the other group was blot-dried with a moist cotton ball to provide a moist condition. Then the adhesive agent was applied following the instruction of the manufacturer. After the instructed waiting time, the teeth surfaces were dried for 1, 5, and 10 seconds to remove the water and solvent and light cured for 10 seconds (Figure 1). Two layers of 2 mm-thick composites (Filtek Z350, 3M/ESPE, St. Paul, MN, USA) were built up and cured each layer for 40 seconds with LED light curing unit (Elipar S10, 3M/ESPE) with an intensity of 1,000 mW/cm2.


Effect of moisture and drying time on the bond strength of the one-step self-etching adhesive system.

Lee Y, Park JW - Restor Dent Endod (2012)

The schematic view of the experimental design. Wetness of the tooth surface was divided into dry and blot dry groups and drying times after adhesive application were into 1, 5 and 10 seconds groups for each adhesive agent.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC3569400&req=5

Figure 1: The schematic view of the experimental design. Wetness of the tooth surface was divided into dry and blot dry groups and drying times after adhesive application were into 1, 5 and 10 seconds groups for each adhesive agent.
Mentions: Two adhesive systems were used in this experiment (Table 1). Before the application of the adhesive agents, the tooth surface of one group was dried with a strong air blow at 2 cm away from the tooth surface and the other group was blot-dried with a moist cotton ball to provide a moist condition. Then the adhesive agent was applied following the instruction of the manufacturer. After the instructed waiting time, the teeth surfaces were dried for 1, 5, and 10 seconds to remove the water and solvent and light cured for 10 seconds (Figure 1). Two layers of 2 mm-thick composites (Filtek Z350, 3M/ESPE, St. Paul, MN, USA) were built up and cured each layer for 40 seconds with LED light curing unit (Elipar S10, 3M/ESPE) with an intensity of 1,000 mW/cm2.

Bottom Line: The dentin surface was either blot-dried or air-dried before applying these adhesive agents.Composite resin was build up to 4 mm thickness and light cured for 40 sec with 2 separate layers.Then the tooth was sectioned and trimmed to measure the microtensile bond strength using a universal testing machine.

View Article: PubMed Central - PubMed

Affiliation: Department of Conservative Dentistry, Yonsei University Wonju College of Medicine, Wonju, Korea.

ABSTRACT

Objectives: To investigate the effect of dentin moisture degree and air-drying time on dentin-bond strength of two different one-step self-etching adhesive systems.

Materials and methods: Twenty-four human third molars were used for microtensile bond strength testing of G-Bond and Clearfil S(3) Bond. The dentin surface was either blot-dried or air-dried before applying these adhesive agents. After application of the adhesive agent, three different air drying times were evaluated: 1, 5, and 10 sec. Composite resin was build up to 4 mm thickness and light cured for 40 sec with 2 separate layers. Then the tooth was sectioned and trimmed to measure the microtensile bond strength using a universal testing machine. The measured bond strengths were analyzed with three-way ANOVA and regression analysis was done (p = 0.05).

Results: All three factors, materials, dentin wetness and air drying time, showed significant effect on the microtensile bond strength. Clearfil S(3) Bond, dry dentin surface and 10 sec air drying time showed higher bond strength.

Conclusions: Within the limitation of this experiment, air drying time after the application of the one-step self-etching adhesive agent was the most significant factor affecting the bond strength, followed by the material difference and dentin moisture before applying the adhesive agent.

No MeSH data available.


Related in: MedlinePlus