Comparison of the rheological properties of four root canal sealers  

作　　者：Seok Woo Chang Young-Kyu Lee Qiang Zhu Won Jun Shon Woo Cheol Lee Kee Yeon Kum Seung Ho Baek In Bog Lee Bum-Soon Lim Kwang Shik Bae 

机构地区：[1]Department of Conservative Dentistry, School of Dentistry, Kyung Hee University [2]National Instrumentation Center for Environmental Management, Seoul National University [3]Department of Endodontology, School of Dental Medicine, University of Connecticut Health Center [4]Department of Conservative Dentistry, Dental Research Institute, School of Dentistry, Seoul National University Dental Hospital, Seoul National University [5]Dental Research Institute and Department of Dental Biomaterials, School of Dentistry, Seoul National University

出　　处：《International Journal of Oral Science》2015年第1期56-61,共6页国际口腔科学杂志（英文版）

基　　金：supported by the Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Science, ICT and Future Planning (2011-0014231);supported by the National Research Foundation of Korea funded by Ministry of Education, Science and Technology (2009-0086835);supported by a grant from the Kyung Hee University in 2013 (KHU-20131045);supported by Grant No. 04-2009-0032 from the SNUDH Research Fund

摘　　要：The flowability of a root canal sealer is clinically important because it improves the penetration of the sealer into the complex root canal system. The purpose of this study was to compare the flowabilities of four root canal sealers, measured using the simple press method （ISO 6876）, and their viscosities, measured using a strain-controlled rheometer. A newly developed, calcium phosphate-based root canal sealer （Capseal） and three commercial root canal sealers （AH Plus, Sealapex and Pulp Canal Sealer EWT） were used in this study. The flowabilities of the four root canal sealers were measured using the simple press method （n= 5） and their viscosities were measured using a strain-controlled rheometer （n=5）. The correlation between these two values was statistically analysed using Spearman＇s correlation test. The flow diameters and the viscosities of the root canal sealers were strongly negatively correlated （p= -0.8618）. The viscosity of Pulp Canal Sealer EWT was the lowest and increased in the following order： AH Plus〈Sealapex〈Capseal （P〈0.05）. All of the tested root canal sealers showed characteristic time- and temperature-dependent changes in their rheological properties. The viscosities measured using the strain-controlled rheometer were more precise than the flowabilities measured using the simple press method, suggesting that the rheometer can accurately measure the rheological properties of root canal sealers.The flowability of a root canal sealer is clinically important because it improves the penetration of the sealer into the complex root canal system. The purpose of this study was to compare the flowabilities of four root canal sealers, measured using the simple press method （ISO 6876）, and their viscosities, measured using a strain-controlled rheometer. A newly developed, calcium phosphate-based root canal sealer （Capseal） and three commercial root canal sealers （AH Plus, Sealapex and Pulp Canal Sealer EWT） were used in this study. The flowabilities of the four root canal sealers were measured using the simple press method （n= 5） and their viscosities were measured using a strain-controlled rheometer （n=5）. The correlation between these two values was statistically analysed using Spearman＇s correlation test. The flow diameters and the viscosities of the root canal sealers were strongly negatively correlated （p= -0.8618）. The viscosity of Pulp Canal Sealer EWT was the lowest and increased in the following order： AH Plus〈Sealapex〈Capseal （P〈0.05）. All of the tested root canal sealers showed characteristic time- and temperature-dependent changes in their rheological properties. The viscosities measured using the strain-controlled rheometer were more precise than the flowabilities measured using the simple press method, suggesting that the rheometer can accurately measure the rheological properties of root canal sealers.

关 键 词：Capseal rheological property root canal sealer strain-controlled rheometer 

分 类 号：R783.1[医药卫生—口腔医学]