Hybrid layer seals the cementum/4-META/MMA-TBB resin interface.
Although 4-META/MMA-TBB resin has adhesive properties to dentin, and has been clinically used for the bonding treatment of vertically fractured roots and apicoectomy, there has not been any investigation on the adhesion of 4-META/MMA-TBB resin to cementum. The purpose of this in vitro study was to evaluate the bonding and the sealing ability of 4-META/MMA-TBB resin to cementum. Bovine root cementum and dentin surfaces were treated with a citric acid and ferric chloride solution, and the 4-META/MMA-TBB resin was applied on the treated surfaces before testing. The microtensile bond strength and the leakage levels obtained for the cementum were almost equal to those for the dentin. In SEM and TEM observations, a hybrid layer approximately 2-3 microm in thickness was observed at the interface between the resin and the cementum. It is concluded that 4-META/MMA-TBB resin adhered to cementum via a hybrid layer on cementum, as previously reported for dentin.
Tanaka
Saori
S
Department of Periodontology and Endodontology, Graduate School of Dental Medicine, Hokkaido University, Kita 13 Nishi 7, Kita-ku, Sapporo, Hokkaido 060-8586, Japan. tanaka@den.hokudai.ac.jp
Sugaya
Tsutomu
T
Kawanami
Masamitsu
M
Nodasaka
Yoshinobu
Y
Yamamoto
Toshiki
T
Noguchi
Hiroshi
H
Tanaka
Yuko
Y
Ikeda
Takatsumi
T
Sano
Hidehiko
H
Sidhu
Sharanbir K
SK