Evaluation of the effect of blood contamination on the compressive strength of MTA modified with hydration accelerators
Kaveh Oloomi, Eshaghali Saberi, Hadi Mokhtari, Hamid Reza Mokhtari Zonouzi, Ali Nosrat, Mohammad Hossein Nekoofar, Paul Michael Howell Dummer,
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( Kaveh Oloomi ) - Tehran University of Medical Sciences School of Dentistry Department of Endodontics
( Eshaghali Saberi ) - Zahedan University of Medical Sciences Faculty of Dentistry Department of Endodontics
( Hadi Mokhtari ) - Tabriz University of Medical Sciences Faculty of Dentistry Dental and Periodontal Research Center
( Hamid Reza Mokhtari Zonouzi ) - Zahedan University of Medical Sciences Faculty of Dentistry Department of Endodontics
( Ali Nosrat ) - Shahid Beheshti University of Medical Sciences Research Institute of Dental Sciences Iranian Center for Endodontic Research
( Mohammad Hossein Nekoofar ) - Tehran University of Medical Sciences School of Dentistry Department of Endodontics
( Paul Michael Howell Dummer ) - Cardiff University School of Dentistry College of Biomedical and Life Sciences Endodontology Research Group
KMID : 0362320130380030128
Abstract
Objectives: This study was performed to evaluate the effect of blood contamination on the compressive strength (CS) of Root MTA (RMTA) modified with Calcium chloride (CaCl2) and Disodium hydrogen phosphate (Na2HPO4) as setting accelerators over time.
Materials and Methods: A total of 110 cylindrical specimens of RMTA were divided into 6 experimental groups as follows: Group1, RMTA; Group 2, RMTA modified with CaCl2 (RMTA-C); Group 3, RMTA modified with Na2HPO4 (RMTA-N); Group 4, RMTA contaminated with blood; Group 5, RMTA-C contaminated with blood; Group 6, RMTA-N contaminated with blood. The CS of specimens in all groups was evaluated after 3 hr, 24 hr, and 1 wk. In the modified groups (groups 2, 3, 5, and 6) the CS of five specimens per group was also evaluated after 1 hr.
Results: Blood contamination significantly reduced the CS of all materials at all time intervals (p < 0.05). After 3 hr, the CS of specimens in the RMTA groups (with and without blood contamination) was significantly lower than those in the RMTA-C and RMTA-N groups (p < 0.05). The CS values were not significantly different at the other time intervals. In all groups, the CS of specimens significantly increased over time (p < 0.05).
Conclusions: Blood contamination decreased the CS of both original and accelerated RMTA.
키워드
Blood contamination; Calcium chloride; Compressive strength; Disodium hydrogen phosphate; Mineral trioxide aggregate
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