Properties of a new injectable type of root canal filling resin with adhesiveness to dentin.
The properties of a new, injectable type of root canal wall, adhesive filling resin, which we developed, were studied for its physical properties, adhesiveness to dentin and the root canal, and sealing ability. The new resin consisted of a powder composed of a specially selected poly(methyl methacrylate) and barium sulfate radiopacifier and liquid composed of methyl methacrylate monomer and tributylborane catalyst. A mixture of both components had a consistency suitable for injection. The physical properties, including radiopacity, were evaluated according to the ISO standard. The adhesiveness to dentin and the root canal was investigated by bond strength testing or by scanning electron microscopy. The apical sealing ability of the new resin was compared by a dye penetration test with that of gutta-percha/sealer. The findings of this study indicated that the new filling resin had physical properties satisfying all the ISO requirements for dental root canal sealing materials: a tensile bond strength to dentin of 7.3 MPa, a significantly better sealing ability compared with gutta-percha/sealer, the capability of forming resin tags in dentinal tubules, and removability.
Imai
Yohji
Y
Institute of Biomaterials and Bioengineering, Tokyo Medical and Dental University, Japan.
Komabayashi
Takashi
T
D000268:Adhesiveness; D001896:Boron Compounds; D003806:Dentin Permeability; D017220:Dentin-Bonding Agents; D006801:Humans; D007180:Incisor; D007267:Injections; D008422:Materials Testing; D008855:Microscopy, Electron, Scanning; D019904:Polymethyl Methacrylate; D012387:Root Canal Filling Materials / Q000737:chemistry; D012389:Root Canal Obturation / Q000379:methods*; D013718:Tensile Strength
D001896:Boron Compounds; D017220:Dentin-Bonding Agents; C473451:Endoresin-2; D012387:Root Canal Filling Materials; C009523:tri-n-butylborane; D019904:Polymethyl Methacrylate