Application of mercury intrusion porosimetry for studying the porosity of mineral trioxide aggregate at two different pH

Mohammad Ali Saghiri, Kamal Asgar, Mehrdad Lotfi, Kasra Karamifar, Prasanna Neelakantan, John L. Ricci

Research output: Contribution to journalArticlepeer-review

Abstract

Objective. To evaluate a novel method of detecting and comparing the porosity of white Mineral Trioxide Aggregate and Portland cement at two different pH. Materials and methods. Cylindrical specimens (n = 120) were prepared from hydrated ordinary white Portland Cement (WPC) (n = 60) and white Mineral Trioxide Aggregate (WMTA) (n = 60) and exposed to environments with pH of 4.4 (n = 30) or 7.4 (n = 30). The pore size distribution and total pore volume were detected using Mercury Intrusion Porosimetry. Data were analyzed by analysis of variance and post-hoc Tukey or Tamhane test (p = 0.05). Results. The pore volume of WMTA was significantly lesser than WPC at both pH (p < 0.05). The surface tension of mercury was taken as 480 (N/m) and the contact angle 141.3°for both materials. Pores were consistently found in all specimens. Total pore volumes for WPC and WMTA (cubic centimeter/gram) were 0.1954 and 0.1023, respectively, while the diameter of the pores ranged from 50100 and 2050 , respectively. Conclusions. Mercury Intrusion Porosimetry technique is a promising and reliable technique for assessing the porosity of endodontic materials.

Original languageEnglish (US)
Pages (from-to)78-82
Number of pages5
JournalActa Odontologica Scandinavica
Volume70
Issue number1
DOIs
StatePublished - Jan 2012

Keywords

  • Leakage
  • Mercury intrusion porosimetry
  • Mineral trioxide aggregate
  • Porosity

ASJC Scopus subject areas

  • Dentistry(all)

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