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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Saghiri, Mohammad Ali Asgar, Kamal Lotfi, Mehrdad Karamifar, Kasra Neelakantan, Prasanna Ricci, John L. |
| Description | Country affiliation: Iran Author Affiliation: Saghiri MA ( Department of Dental Material, Dental School, Azad University, Dental Branch, Tehran, Iran. saghiri@gmail.com) |
| 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 50-100 Å and 20-50 Å, respectively. CONCLUSIONS: Mercury Intrusion Porosimetry technique is a promising and reliable technique for assessing the porosity of endodontic materials. |
| File Format | HTM / HTML |
| ISSN | 00016357 |
| Issue Number | 1 |
| Volume Number | 70 |
| e-ISSN | 15023850 |
| Journal | Acta Odontologica Scandinavica |
| Language | English |
| Publisher | Taylor & Francis |
| Publisher Date | 2012-01-01 |
| Publisher Place | Great Britain (UK) |
| Access Restriction | Subscribed |
| Subject Keyword | Discipline Dentistry Aluminum Compounds Calcium Compounds Mercury Chemistry Oxides Root Canal Filling Materials Silicates Dental Cements Dental Leakage Prevention & Control Drug Combinations Feasibility Studies Hydrogen-ion Concentration Materials Testing Methods Permeability Porosity Journal Article |
| Content Type | Text |
| Resource Type | Article |
| Subject | Dentistry Medicine |
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