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Bond strength of mineral trioxide aggregate to root dentin after exposure to different irrigation solutions
Author(s) -
Nagas Emre,
Cehreli Zafer C.,
Uyanik Mehmet Ozgur,
Durmaz Veli,
Vallittu Pekka K.,
Lassila Lippo V.J.
Publication year - 2014
Publication title -
dental traumatology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.82
H-Index - 81
eISSN - 1600-9657
pISSN - 1600-4469
DOI - 10.1111/edt.12070
Subject(s) - mineral trioxide aggregate , sodium hypochlorite , bond strength , dentin , perforation , dentistry , chemistry , root canal , irrigation , nuclear chemistry , peracetic acid , adhesive , materials science , medicine , composite material , ecology , organic chemistry , layer (electronics) , punching , biology , hydrogen peroxide
Aim The aim of the study was to evaluate the regional push‐out bond strength of mineral trioxide aggregate ( MTA ) after exposure to sodium hypochlorite (Na OC l), ethylenediaminetetraacetic ( EDTA ), and peracetic acid ( PAA ) irrigation solutions. Materials and Methods 1‐mm‐thick longitudinal slabs of root dentin were obtained from freshly extracted human canine teeth ( n = 80). Simulated root perforation defects, 1 mm in diameter, were prepared in the coronal, middle, and apical thirds of radicular dentin. Mineral trioxide aggregate was placed into the cavities, and the specimens were stored for 1 week at 37°C. Thereafter, the specimens were randomly divided into four groups ( n = 20) according to the irrigation solution applied over the repair sites: Group 1–10 ml of 5.25% NaOCl for 10 min; Group 2–10 ml of 5.25% NaOCl for 10 min, followed by 5 ml 17% EDTA for 5 min; Group 3–10 ml of 5.25% NaOCl for 10 min, followed by application of 5 ml 1% PAA for 5 min; and Group 4–no irrigation. Push‐out test was performed at a crosshead speed of 1 mm/min. Debonding values were compared statistically using two‐way analysis of variance and Tukey tests ( P < 0.05). Results The push‐out bond strength of MTA was not affected by the type of irrigation solution or location of the perforation defects (both P < 0.05). Stereomicroscopic inspection of the samples showed that the bond failure was predominantly adhesive. Conclusion Exposure of repaired root perforations to 5.25% Na OC l, 17% EDTA , or 1% PAA does not alter the dislocation resistance of MTA at different locations of root dentin.