Effect of chlorhexidine application on long-term shear bond strength of resin cements to dentin |
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| Authors: | Fereshteh Shafiei Mahtab Memarpour |
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| Institution: | 1. Department of Cancer Epidemiology, Moffitt Cancer Center and Research Institute, 12902 Magnolia Drive, Tampa, FL 33612, USA;2. Center for Infection Research in Cancer, Moffitt Cancer Center and Research Institute, 12902 Magnolia Drive, Tampa, FL 33612, USA;3. Proteomics, Moffitt Cancer Center and Research Institute, 12902 Magnolia Drive, Tampa, FL 33612, USA;4. Molecular Oncology, Moffitt Cancer Center and Research Institute, 12902 Magnolia Drive, Tampa, FL 33612, USA;1. Israel Defense Forces, Medical Corps, Tel Hashomer, Israel;2. Department of Military Medicine, Faculty of Medicine, Hebrew University, Jerusalem, Israel;3. Anesthesiology Department, Bnai Zion Medical Center, Faculty of Medicine, Technion Institute of Technology, Haifa, Israel;1. Medical Physics Department, School of Medicine, Shiraz University of Medical Sciences, Shiraz, Iran;2. Ionizing and Non-ionizing Radiation Protection Research Center (INIRPRC), Shiraz University of Medical Sciences, Shiraz, Iran;3. Prevention of Oral and Dental Disease Research Center, Dental School, Shiraz University of Medical Sciences, Shiraz, Iran;4. Tangestan Health Network, Bushehr University of Medical Sciences, Bushehr, Iran;1. Cardiovascular and Pulmonary Branch, National Heart, Lung, and Blood Institute, National Institutes of Health;2. Flow Cytometry Core Facility, National Heart, Lung, and Blood Institute, National Institutes of Health;3. Office of Biostatistics Research, Division of Cardiovascular Science, National Heart, Lung, and Blood Institute, National Institutes of Health;4. Department of Dermatology, Uniformed Services University of the Health Sciences, Bethesda, MD |
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| Abstract: | PurposeThe purpose of this study was to investigate the effect of chlorhexidine CH] on dentin bond strength of three resin cements after 1 year of water storage.MethodsA flat middle dentin surface was prepared on 120 extracted premolars. The teeth were randomly divided into 6 groups of 20 specimens each according to the resin cement used: Panavia F2.0, Variolink II, and RelyX Unicem, with or without CH application. After cementation of an indirect composite rod Z250], one subgroup n = 10] was tested after 24 h in water at 37 °C and the other subgroup n = 10] was tested after 1 year storage in water plus thermocycling. A shear bond strength SBS] test was performed. The data in MPa] were analyzed with ANOVA and Tukey tests P < 0.05].ResultsThree-way ANOVA resin cement, CH and time] indicated that Variolink II had the highest strength 16.65 ± 3.60] and RelyX Unicem had the lowest strength 9.30 ± 4.07]. Chlorhexidine application increased SBS 13.31 ± 4.61] compared to samples without CH 12.16 ± 5.04] P = 0.04]. Initial SBS 15.63 ± 4.37] was significantly higher than after 1 year of storage 9.85 ± 3.36] P < 0.001]. Separate two-way ANOVA for 24-h and 1-year data showed that cement had a significant effect but CH and its interaction had no significant effect at 24 h, whereas at 1 year the two factors and their interaction differed significantly P ≤ 0.001].ConclusionsChlorhexidine 2% can diminish the loss of bonding effectiveness over time associated to etch-and-rinse and self-etch cements, although it appears not have any effect on self-adhesive cement. |
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