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Mechanical properties and microstructure analysis of mineral trioxide aggregate mixed with hydrophilic synthetic polymer
Author(s) -
Noh YoungSeok,
Chung ShinHye,
Bae Kwang Shik,
Baek SeungHo,
Kum KeeYeon,
Lee WooCheol,
Shon WonJun,
Rhee SangHoon
Publication year - 2015
Publication title -
journal of biomedical materials research part b: applied biomaterials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.665
H-Index - 108
eISSN - 1552-4981
pISSN - 1552-4973
DOI - 10.1002/jbm.b.33257
Subject(s) - mineral trioxide aggregate , polyvinyl alcohol , materials science , microstructure , distilled water , compressive strength , composite material , scanning electron microscope , dentistry , chemistry , chromatography , medicine
In dentistry, mineral trioxide aggregate (MTA) has been widely used for root perforation, retrograde filling, pulp capping and regenerative endodontics. Despite its superior sealing ability and biocompatibility, MTA has critical drawbacks regarding handling property such as sandy property, lacking cohesive properties and wash‐out tendency. So, it is necessary to improve the fluidity of MTA in order to improve its handling properties. In this study, we applied modified liquid to improve handling properties of MTA. Methods Polyvinyl alcohol (PVA; 3 and 5 wt %) aqueous solutions were prepared and the samples were divided into three groups: DW group (MTA mixed with distilled water), P3 group (MTA mixed with 3% PVA), and P5 group (MTA mixed with 5% PVA). Handling property, initial setting time, and compressive strength were evaluated. The microstructures were observed by Field emission scanning electron microscope (FE‐SEM) and X‐ray diffractometer (XRD) phase analyses were performed. Results PVA modified group showed similar behavior of IRM compared to DW group. The initial setting time of P3 or P5 group was significantly longer than that of DW group ( p < 0.05). The compressive strength of DW group was higher than that of P3 or P5 groups ( p < 0.05). Experimental groups (P3 and P5) showed no microstructural differences compared with DW group when the fractured surfaces were observed by FE‐SEM with XRD patterns after 3 and 14 days. Conclusions Polyvinyl alcohol, a modified liquid for MTA, improved the handling properties of the material without violating its microstructure. © 2014 Wiley Periodicals, Inc. J Biomed Mater Res Part B: Appl Biomater, 103B: 777–782, 2015.