title: Effects of a newly designed HEMA-free, multi-purpose, single-bottle, self-etching adhesive on bonding to dental hard tissues, zirconia-based ceramics, and gold alloy.
abstract: This study investigated the bonding effectiveness of newly designed self-etching adhesives to four types of adherends--enamel, dentin, zirconia, and gold (Au) alloy. Five experimental adhesives were prepared, which contained 3.0-5.0 wt% 6-methacryloyloxyhexyl phosphonoacetate (6-MHPA) or 6-methacryloyloxyhexyl 3-phosphonopropionate (6-MHPP), 3.0 wt% 4-acryloyloxyethoxycarbonylphthalic acid (4-AET) or 17.0 wt% 4-methacryloyloxyethoxycarbonylphthalic acid (4-MET), 0-0.5 wt% 6-methacryloyloxyhexyl 6,8-dithiooctanoate (6-MHDT) or 10-methacryloyloxydecyl 6,8-dithiooctanoate (10-MDDT), and varying contents of Bis-GMA, dimethacrylate monomers, water, acetone, and a photoinitiator system. After 2,000 times of thermal cycling, shear bond strengths (SBSs) between a resin composite (Beautifil II, Shofu Inc., Japan) and the four adherends, bonded using the experimental adhesives, were measured at 1.0 mm/min. No statistically significant differences in SBS for bonding to ground enamel, dentin, sandblasted zirconia and Au alloy (p>0.05) were found between experimental adhesives which contained 6-MHPA and/or 6-MHPP, 4-MET or 4-AET, 6-MHDT and/or 10-MDDT, Bis-GMA, and dimethacrylates. An adhesive layer of less than 5.0 µm thickness, by scanning electron microscopy observation, revealed strong adhesion to the four adherends. Therefore, the newly designed multi-purpose, self-etching adhesive strongly adhered to all the four adherend materials tested.
authors.affiliation: Department of Research and Development, Shofu Inc., 11 Kamitakamatsu-cho, Fukuine, Higashiyama-ku, Kyoto 605-0983, Japan. k-ikemura@shofu.co.jp
authors.forename: Kunio
authors.initials: K
authors.lastname: Ikemura
authors.forename: Yoshiyuki
authors.initials: Y
authors.lastname: Jogetsu
authors.forename: Kazuya
authors.initials: K
authors.lastname: Shinno
authors.forename: Toshiyuki
authors.initials: T
authors.lastname: Nakatsuka
authors.forename: Takeshi
authors.initials: T
authors.lastname: Endo
authors.forename: Yoshinori
authors.initials: Y
authors.lastname: Kadoma
mesh_terms: D000134:Acid Etching, Dental / Q000379:methods; D017438:Bisphenol A-Glycidyl Methacrylate / Q000737:chemistry; D002210:Caprylates / Q000737:chemistry; D003188:Composite Resins / Q000737:chemistry; D001840:Dental Bonding; D003738:Dental Cements / Q000737:chemistry*; D003743:Dental Enamel / Q000648:ultrastructure*; D003764:Dental Materials / Q000737:chemistry*; D003776:Dental Porcelain / Q000737:chemistry*; D003804:Dentin / Q000648:ultrastructure*; D006047:Gold Alloys / Q000737:chemistry*; D006801:Humans; D008422:Materials Testing; D008689:Methacrylates / Q000737:chemistry; D008855:Microscopy, Electron, Scanning; D009943:Organophosphorus Compounds / Q000737:chemistry; D010746:Phosphonoacetic Acid / Q000031:analogs & derivatives / Q000737:chemistry; D010795:Phthalic Acids / Q000737:chemistry; D011092:Polyethylene Glycols / Q000737:chemistry; D011109:Polymethacrylic Acids / Q000737:chemistry; D033081:Shear Strength; D013314:Stress, Mechanical; D013499:Surface Properties; D013696:Temperature; D013997:Time Factors; D015040:Zirconium / Q000737:chemistry*
chemical_list: C546895:6-methacryloyloxyhexyl phosphonoacetate; C470433:Beautifil composite resin; D002210:Caprylates; D003188:Composite Resins; D003738:Dental Cements; D003764:Dental Materials; D006047:Gold Alloys; D008689:Methacrylates; D009943:Organophosphorus Compounds; D010795:Phthalic Acids; D011109:Polymethacrylic Acids; D003776:Dental Porcelain; C020946:triethylene glycol dimethacrylate; D011092:Polyethylene Glycols; D017438:Bisphenol A-Glycidyl Methacrylate; C003128:beta-phosphonopropionic acid; C004919:ethylene dimethacrylate; D015040:Zirconium; D010746:Phosphonoacetic Acid; C031492:octanoic acid; C028541:zirconium oxide