Mechanical response of dental cements as determined by nanoindentation and scanning electron microscopy

Mohammad Ali Saghiri, Amir Nazari, Franklin Garcia-Godoy, Armen Asatourian, Mansour Malekzadeh, Maryam Elyasi

Research output: Contribution to journalReview article

7 Citations (Scopus)

Abstract

This study evaluated the effects of nanoindentation on the surface of white mineral trioxide aggregate (WMTA), Bioaggregate and Nano WMTA cements. Cements were mixed according to the manufacturer directions, condensed inside glass tubes, and randomly divided into three groups (n = 8). Specimens were soaked in synthetic tissue fluid (pH = 7.4) and incubated for 3 days. Cement pellets were subjected to nanoindentation tests and observed by scanning electron microscopy. Then, the images were processed and the number of cracks and total surface area of defects on the surface were calculated and analyzed using ImageJ. Data were submitted to one-way analysis of variance and a post hoc Tukey's test. The lowest number of cracks and total surface of defects were detected in Nano WMTA samples; however, it was not significantly different from WMTA samples (p = 0.588), while the highest values were noticed in Bioaggregate specimens that were significantly different from Nano WMTA and WMTA (p = 0.0001). The surface of WMTA and Nano WMTA showed more resistance after exposure to nano-compressive forces which indicated a better surface tolerance against these forces and crack formation. This suggests these substances are more tolerant cement materials which can predictably withstand loaded situations in a clinical scenario.

Original languageEnglish (US)
Pages (from-to)1458-1464
Number of pages7
JournalMicroscopy and Microanalysis
Volume19
Issue number6
DOIs
StatePublished - Dec 1 2013

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Dental cement
Nanoindentation
cements
nanoindentation
Minerals
minerals
Scanning electron microscopy
scanning electron microscopy
Cements
cracks
Cracks
analysis of variance
Defects
crack initiation
defects
Analysis of variance (ANOVA)
Crack initiation
pellets
Tissue
tubes

All Science Journal Classification (ASJC) codes

  • Instrumentation

Cite this

Mechanical response of dental cements as determined by nanoindentation and scanning electron microscopy. / Saghiri, Mohammad Ali; Nazari, Amir; Garcia-Godoy, Franklin; Asatourian, Armen; Malekzadeh, Mansour; Elyasi, Maryam.

In: Microscopy and Microanalysis, Vol. 19, No. 6, 01.12.2013, p. 1458-1464.

Research output: Contribution to journalReview article

Saghiri, Mohammad Ali ; Nazari, Amir ; Garcia-Godoy, Franklin ; Asatourian, Armen ; Malekzadeh, Mansour ; Elyasi, Maryam. / Mechanical response of dental cements as determined by nanoindentation and scanning electron microscopy. In: Microscopy and Microanalysis. 2013 ; Vol. 19, No. 6. pp. 1458-1464.
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