Premium
Push‐out bond strength of a nano‐modified mineral trioxide aggregate
Author(s) -
Saghiri Mohammad Ali,
GarciaGodoy Franklin,
Gutmann James L.,
Lotfi Mehrdad,
Asatourian Armen,
Ahmadi Hadi
Publication year - 2013
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/j.1600-9657.2012.01176.x
Subject(s) - mineral trioxide aggregate , bond strength , dentin , adhesive , scanning electron microscope , materials science , chemistry , nuclear chemistry , composite material , dentistry , medicine , layer (electronics)
To analyze the push‐out bond strength of Angelus WMTA ( A ngelus D ental P roducts), a nano‐modification of WMTA ( K amal A sgar R esearch C enter) and B ioaggregate ( I nnovative B ioceramix). Methods Sixty 2‐mm‐thick root sections were prepared from 60 single‐rooted human teeth. The dentin disks were randomly divided into three groups ( n = 20) and filled with Angelus WMTA , Nano‐ WMTA , or Bioaggregate, respectively. Push‐out bond strength values of the specimens were measured by a universal testing machine and examined under scanning electron microscope at × 40 magnification to determine the nature of the bond failure. The data were analyzed with a Kruskal–Wallis test. Results The greatest mean for push‐out bond strength (138.48 ± 11.43 MP a) was observed for the nano‐modification of WMTA . The values decreased to 110.73 ± 11.19 and 25.64 ± 5.27 MP a for Angelus WMTA and Bioaggregate, respectively. There were significant differences between the groups ( P < 0.001). Inspection of the samples revealed the bond failure to be predominantly adhesive type except for the nano‐modification group, as some samples also exhibited cohesive failures. Conclusions It is concluded that the force needed for the displacement of the nano‐modification of WMTA ( NWMTA ) was significantly higher than for Angelus WMTA and Bioaggregate.