Journal of the Korean Academy of Pediatric Dentistry 2011;38(3):229-236.
Published online August 31, 2011.
COMPARISON OF SETTING EXPANSION AND TIME OF ORTHOMTA, PROROOT MTA AND PORTLAND CEMENT
Ji-Ye Kang, Jong-Soo Kim, Seung-Hoon Yoo
Department of Pediatric Dentistry, College of Dentistry, Dankook University 
Correspondence:  Jong-Soo Kim,  Tel: 041-550-1931, Email: jskim@dku.edu
Received: 4 July 2011   • Accepted: 20 August 2011
Abstract
ProRoot MTA(Dentsply Tulsa, U.S.A) which has similar component with Portland cement has setting expansion character and long setting time. Excessive expansion can cause fracture at the apical portion of the root and decreasing of volume stability. And the long setting time makes additional visits for crown restoration and slow setting process of this material can change physical properties itself. In this study, among requirements of root canal filling material(KS P ISO 6876) which is revised at 2008, we investigated the setting time and setting expansion. Objects are recently developed OrthoMTA(BioMTA, Korea), conventional ProRoot white MTA(Dentsply Tulsa, U.S.A) and White portland cement(Union, Korea). The results in setting expansion, OrthoMTA was 0.08±0.02%, ProRoot white MTA and White portland cement were each 0.28±0.06%, 0.80±0.25%(p<0.05). The results in setting time, OrthoMTA, ProRoot white MTA, White portland cement were each 307.78±3.83 min, 150.44±2.35 min, 235.33±9.07min(p<0.05).
Key Words: Mineral trioxide aggregate, Setting expansion, Setting time, OrthoMTA, ProRoot MTA


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