Effects of Blood Contamination on Microtensile Bond Strength to Dentin of Three Self-etch Adhesives
Autor: | Dong Sung Park, Seung Hyun Kyung, Hyun Mi Yoo, Tae Seok Oh, Ran Yeob Lim, Byeong-Hoon Cho, Seok Woo Chang |
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Rok vydání: | 2010 |
Předmět: |
Dental Stress Analysis
Time Factors Materials science Surface Properties Acrylic Resins Dentistry Dental bonding engineering.material Composite Resins Dental Materials Tensile Strength Materials Testing Dentin medicine Humans General Dentistry Acrylic resin Decontamination Primer (paint) Universal testing machine Bond strength business.industry Dental Bonding Temperature Water Contamination Resin Cements Blood medicine.anatomical_structure Dentin-Bonding Agents visual_art Microscopy Electron Scanning visual_art.visual_art_medium engineering Methacrylates Stress Mechanical Adhesive business |
Zdroj: | Operative Dentistry. 35:330-336 |
ISSN: | 1559-2863 0361-7734 |
DOI: | 10.2341/09-244-l |
Popis: | This study evaluated the effects of blood contamination and decontamination methods during different steps of bonding procedures on the microtensile bond strength of two-step self-etch adhesives to dentin. Sixty extracted human molars were ground flat to expose occlusal dentin. The 60 molars were randomly assigned to three groups, each treated with a different two-step self-etch adhesive: Clearfil SE Bond, AdheSE and Tyrian SPE. In turn, these groups were subdivided into five subgroups (n = 20), each treated using different experimental conditions as follows: control group-no contamination; contamination group 1-CG1: primer application/ contamination/primer re-application; contamination group 2-CG2: primer application/contamination/wash/dry/primer re-application; contamination group 3-CG3: primer application/adhesive application/light curing/contamination/ adhesive re-application/light curing; contamina- tion group 4-CG4: primer application/adhesive application/light curing/contamination/wash/ dry/adhesive re-application/light curing. Composite buildup was performed using Z250. After 24 hours of storage in distilled water at 37 degrees C, the bonded specimens were trimmed to an hourglass shape and serially sectioned into slabs with 0.6 mm2 cross-sectional areas. Microtensile bond strengths (MTBS) were assessed for each specimen using a universal testing machine. The data were analyzed by two-way ANOVA followed by a post hoc LSD test. SEM evaluations of the fracture modes were also performed. The contaminated specimens showed lower bond strengths than specimens in the control group (p < 0.05), with the exception of CG1 in the Clearfil SE group and CG2 and CG3 in the Tyrian SPE group. Among the three self-etch adhesives, the Tyrian SPE group exhibited a significantly lower average MTBS compared to the Clearfil SE Bond and AdheSE (p < 0.05) groups. Based on the results of the current study, it was found that blood contamination reduced the MTBS of all three self-etch adhesives to dentin, and water-rinsing was unable to overcome the effects of blood contamination. |
Databáze: | OpenAIRE |
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