title: Long-term durability of root-end sealing with 4-MEtA/MMA-TBB resin.
abstract: The purpose of this study was to compare root-end sealing using 4-META/MMA-TBB resin with that using conventional retrograde root filling technique, and thereby determine if 4-META/MMA-TBB resin offers long-term prevention against dye leakage from the root canal of human teeth. Thirty-five teeth had the apical 2.5 mm of the root resected. In the Sealing (SB) group, 4-META/MMA-TBB resin was applied to the resected surface. In the Filling (Am and EBA) groups, a root-end cavity was prepared and retrofilled with high copper amalgam alloy or reinforced zinc oxide-eugenol cement. Root canals were filled with methylene blue dye solution. Then, dye leakage outside the root canal was measured for 50 weeks. The integrated amount of leakage in SB group was significantly lower than those in Am group (p < 0.05) and EBA group (p < 0.05). Therefore, it can be concluded that root-end sealing using 4-META/MMA-TBB resin resulted in better, long-term sealing than conventional retrograde root filling.
authors.affiliation: Department of Periodontology & Endodontology, Division of Oral Health Science, Hokkaido University Graduate School of Dental Medicine, Kita 13 Nishi 7, Kita-ku, Sapporo 060-8586, Japan. yuuko@den.hokudai.ac.jp
authors.forename: Yuko
authors.initials: Y
authors.lastname: Tanaka
authors.forename: Tsutomu
authors.initials: T
authors.lastname: Sugaya
authors.forename: Saori
authors.initials: S
authors.lastname: Tanaka
authors.forename: Masamitsu
authors.initials: M
authors.lastname: Kawanami
mesh_terms: D000180:Acrylic Resins; D001641:Bicuspid; D001896:Boron Compounds; D003723:Dental Amalgam; D003763:Dental Leakage / Q000517:prevention & control*; D006801:Humans; D008422:Materials Testing; D008768:Methylmethacrylates; D012184:Retrograde Obturation / Q000379:methods*; D012387:Root Canal Filling Materials; D018709:Statistics, Nonparametric
chemical_list: D000180:Acrylic Resins; D001896:Boron Compounds; D008768:Methylmethacrylates; D012387:Root Canal Filling Materials; C476987:methylmethacrylate-tributylborane resin; D003723:Dental Amalgam; C031172:4-META resin