TY - JOUR
T1 - Application of mercury intrusion porosimetry for studying the porosity of mineral trioxide aggregate at two different pH
AU - Saghiri, Mohammad Ali
AU - Asgar, Kamal
AU - Lotfi, Mehrdad
AU - Karamifar, Kasra
AU - Neelakantan, Prasanna
AU - Ricci, John L.
PY - 2012/1
Y1 - 2012/1
N2 - 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.
AB - 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.
KW - Leakage
KW - Mercury intrusion porosimetry
KW - Mineral trioxide aggregate
KW - Porosity
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U2 - 10.3109/00016357.2011.597777
DO - 10.3109/00016357.2011.597777
M3 - Article
C2 - 21728747
AN - SCOPUS:84255177474
SN - 0001-6357
VL - 70
SP - 78
EP - 82
JO - Acta Odontologica Scandinavica
JF - Acta Odontologica Scandinavica
IS - 1
ER -