Effectiveness of pretreatment with phosphoric acid,sodium hypochlorite and sulfinic acid sodium salt on root canal dentin resin bonding |
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| Institution: | 1. Functional Occlusal Treatment, Department of Crown and Bridge Prosthodontics, School of Life Dentistry at Niigata, The Nippon Dental University, 1-8, Hamaura-cho, Chuo-ku, Niigata 951-8580, Japan;2. Department of Crown and Bridge Prosthodontics, The Nippon Dental University School of Life Dentistry Niigata Japan;1. Department of Biomedical and Neuromotor Sciences, Alma Mater Studiorum - University of Bologna, Bologna, Italy;2. Private practice, Battipaglia (SA), Italy;3. Private practice, Bari, Italy;4. Department of Neurosciences, University of Padova, Padova, Italy;1. Oral Functional Prosthodontics, Department of Oral Functional Science, Faculty and Graduate School of Dental Medicine, Hokkaido University, Kita 13, Nishi 7, Kita-ku, Sapporo, Hokkaido 060-8586, Japan;2. Oral Molecular Microbiology, Department of Oral Pathobiological Science, Faculty and Graduate School of Dental Medicine, Hokkaido University, Kita 13, Nishi 7, Kita-ku, Sapporo, Hokkaido 060-8586, Japan;3. Department of Removable Prosthodontics, Hokkaido University Hospital, Kita 14, Nishi 5, Kita-ku, Sapporo, Hokkaido 060-8586, Japan;4. Health Environment Control Research Group, Health Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), 2217-14, Hayashi, Takamatsu, Kagawa 761-0395, Japan;5. Department of Advanced Prosthodontics, Graduate School of Biomedical and Health Sciences, Hiroshima University, 1-2-3, Kasumi, Minami-ku, Hiroshima 734-8553, Japan;6. Department of Applied Chemistry, Graduate School of Natural Science and Technology, Okayama University, 3-1-1, Tsushimanaka, Kita-ku, Okayama 700-8530, Japan;7. Biomaterials and Bioengineering, Department of Oral Health Science, Faculty and Graduate School of Dental Medicine, Hokkaido University, Kita 13, Nishi 7, Kita-ku, Sapporo, Hokkaido 060-8586, Japan;1. Department of Prosthodontics, Gerodontology and Oral Rehabilitation, Osaka University Graduate School of Dentistry, 1-8 Yamadaoka, Suita, Osaka 565-0871, Japan;2. Division of Comprehensive Prosthodontics, Niigata University Graduate School of Medical and Dental Sciences, 2-5274 Gakkocho-dori, Niigata 951-8514, Japan;3. Department of Preventive Cardiology, National Cerebral and Cardiovascular Center, 6-1 Kishibe-Shimmachi, Suita, Osaka, 564-8565, Japan;4. Osaka University, 1-8 Yamadaoka, Suita, Osaka 565-0871, Japan;5. Department of Preventive Medicine and Epidemiology, National Cerebral and Cardiovascular Center, 5-7-1, Fujishiro-dai, Suita, Osaka 565-8565, Japan;1. Harinakano Family Dentistry, Japan;2. Department of Prosthodontics, Gerodontology and Oral Rehabilitation, Osaka University Graduate School of Dentistry, Japan |
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| Abstract: | PurposeThe purpose of this study was to evaluate the effect of pretreatment using phosphoric acid, sodium hypochlorite and sul?nic acid sodium salt on the bonding of one-step self-etching adhesives to root canal dentin.MethodsThirty-six single-rooted sound human premolars were randomly assigned into three groups before applying the one-step self-etching adhesive. These comprised a control group with no pretreatment, an NC group that received phosphoric acid and subsequent sodium hypochlorite gel pretreatments, and an NC + AC group that received an additional treatment with sulfinic acid sodium salt following the same pretreatment applied to the NC group. Microtensile bond strength measurements, bonding interface observations by scanning electron microscopy (SEM), elemental analyses by X-ray photoelectron spectroscopy (XPS) and degree of polymerization (DOP) analyses by Raman spectroscopy were subsequently performed.ResultsThe bond strength was significantly higher in the NC + AC group than in the other two groups (Control: P = 000.1 and NC: P = 0.004). SEM observations showed that resin tags were present in the dentinal tubules in the NC and NC + AC groups. Compared to the control group, the adhesive resin layer had a lower DOP in the NC group, while the DOP for the NC + AC group was higher than that of the NC specimens.ConclusionsBonding to root canal dentin was improved by applying sul?nic acid sodium salt in addition to treatment with phosphoric acid followed by sodium hypochlorite. The DOP of the adhesive resin was reduced by sodium hypochlorite and subsequently restored by applying sul?nic acid sodium salt. |
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| Keywords: | Adhesive dentistry Dentin bonding Antioxidant/reducing agent Mild one-step self-etching adhesive Bonding effectiveness Microtensile bond strength XPS Raman spectrum |
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