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Does endodontic post space irrigation affect smear layer removal and bonding effectiveness?
Author(s) -
Gu XinHua,
Mao CaiYun,
Liang Cong,
Wang HuiMing,
Kern Matthias
Publication year - 2009
Publication title -
european journal of oral sciences
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.802
H-Index - 93
eISSN - 1600-0722
pISSN - 0909-8836
DOI - 10.1111/j.1600-0722.2009.00661.x
Subject(s) - smear layer , bond strength , sodium hypochlorite , dentin , dentistry , materials science , adhesive , layer (electronics) , chemistry , nuclear chemistry , composite material , medicine , organic chemistry
The effect of different post space irrigants on smear layer removal and dentin bond strength was evaluated. Sixty‐six extracted sound maxillary central incisors were endodontically treated. After post space preparation, the teeth were assigned to three groups of 22 teeth each. The teeth of these three groups were irrigated for 1 min with 17% ethylenediaminetetracetic acid (EDTA) (group 1), 5.25% sodium hypochlorite (NaOCl) (group 2), or 0.9% sodium chloride (NaCl) (group 3). In each group, eight specimens were split longitudinally for smear layer evaluation, and the other fourteen specimens were filled with a self‐etching adhesive system (Panavia F). Four of 14 specimens of each group were prepared for evaluation of the resin–dentin interdiffusion zone (RDIZ) and resin tags, and the other 10 specimens were serially sectioned for push‐out test analysis. Smear layer removal and bond strength were affected by different post space irrigants. EDTA removed the smear layer extremely effectively and, as a result, improved the bond strength at each region (apical, middle, and coronal) of the roots. Resin tag formation and the RDIZ were also affected by different irrigants and in accordance with bond strength. Therefore, removal of the smear layer use a self‐etching luting system plays an important role in bonding effectiveness.