title: An experimental study of the sealing ability of a dentinal apical plug treated with bonding agent.
abstract: The purpose of this study was to evaluate the sealing ability of a dentinal apical plug treated with a bonding agent. Ninety human lower premolars were used. The teeth were divided into three groups. in groups 1 and 2, to prepare an apical isthmus of 1 mm in length, the first apical seat was prepared with a #45 K file 1 mm short of the anatomical apex and with a #60 K file 2 mm short for the second apical seat. Dry dentin fillings were packed in the apical isthmus with a #60 K file. In group 1, the root canal was obturated with gutta-percha and Canals root canal sealer by the lateral condensation method. In group 2, following an application of the bonding agent to the plug, the root canal was obturated in the same way. In group 3 (control), a single apical seat was prepared with a #60 K file 1 mm short of the apex and the root canal was obturated similarly. The teeth of three groups were immersed in a 1% methylene blue solution for 1, 2, and 4 wk. Dye penetration depth from the apical foramen was determined. Group 2 showed no leakage after 4 wk. Groups 1 and 3 showed dye penetration into the root canal, and in these two groups dye penetration increased with time.
authors.affiliation: Department of Dentistry and Oral Surgery, Hyogo College of Medicine, Japan.
authors.forename: M
authors.initials: M
authors.lastname: Hasegawa
authors.forename: S
authors.initials: S
authors.lastname: Tanaka
authors.forename: S
authors.initials: S
authors.lastname: Satake
authors.forename: A
authors.initials: A
authors.lastname: Shimizu
authors.forename: W
authors.initials: W
authors.lastname: Yoshioka
mesh_terms: D003188:Composite Resins; D003763:Dental Leakage / Q000517:prevention & control*; D003804:Dentin; D017220:Dentin-Bonding Agents; D005069:Evaluation Studies as Topic; D006801:Humans; D019279:Resin Cements; D012389:Root Canal Obturation / Q000379:methods*
chemical_list: C029849:Clearfil Bonding Agent; D003188:Composite Resins; D017220:Dentin-Bonding Agents; D019279:Resin Cements