[Preparation and stability assessment of a new resin root canal filling material].
OBJECTIVE
To synthesize a new resin root canal filling material (NRCFM) and evaluate its stability in water and artificial saliva.


METHODS
The new root canal filling material was made of thermoplastic elastomer (TPE), ethylene vinyl acetate (EVA) and activity fillers. The NRCFM's stability in water and artificial saliva with different pH values was assessed using gravimetric analysis, ICP and FE-SEM.


RESULTS
NRCFM1 and NRCFM2 were successfully made. Gravimetric evaluation showed that the changes in mass over 30 days different solution medium for NRCFM1 and NRCFM2 were comparable to that of GP (P > 0.05) and significantly different from Resilon (P < 0.001). ICP showed slight changes in Si concentration for NRCFM1 and NRCFM2, Zn for GP, Na and Si for Resilon in the alkaline artificial saliva (pH 9.5). GP and Resilon showed release of Zn and Na respectively in distilled water whereas NRCFM1 and NRCFM2 were stable. FE-SEM micrographs showed that there were slight changes on the surface topography of NRCFM1 and NRCFM2.


CONCLUSIONS
The new resin root canal filling material NRCFM1 and NRCFM2 had good stability in different experimental solutions.
Department of Cariology and Endodontology, Guanghua School of Stomatology, Sun Yat-sen University, Guangzhou 510055, China.
Zheng-mei
ZM
Lin
Jun-qi
JQ
Ling
Fang
F
Liu
Yang
Y
Hu
Yu-tao
YT
Jian
D003188:Composite Resins; D004355:Drug Stability; D008422:Materials Testing; D012387:Root Canal Filling Materials / Q000138:chemical synthesis*; D012389:Root Canal Obturation; D012464:Saliva, Artificial
D003188:Composite Resins; D012387:Root Canal Filling Materials; D012464:Saliva, Artificial