Preparation and Sealing Performance of a New Coal Dust Polymer Composite Sealing Material
نویسندگان
چکیده
منابع مشابه
Coronal sealing ability of a new root canal filling material.
BACKGROUND AND OBJECTIVE To date, many different materials have been proposed for root canal fillings, but gutta-percha (used with various types of sealers) has remained the material of choice for over a century. A new root canal obturation system, the Epiphany endodontic obturation system, has been developed to replace gutta-percha and traditional sealers for root canal obturation. The purpose...
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In order to reduce the failure probability of rubber sealing rings in reciprocating dynamic seal, a new structure of sealing ring based on bionics was designed. The biomimetic ring has three concave ridges and convex bulges on each side which are very similar to earthworms. Bulges were circularly designed and sealing performances of the biomimetic ring in both static seal and dynamic seal were ...
متن کاملSealing Ability of Castor Oil Polymer as a Root-end Filling Material
OBJECTIVE The purpose of this study was to evaluate the sealing ability of castor oil polymer (COP), mineral trioxide aggregate (MTA) and glass ionomer cement (GIC) as root-end filling materials. Forty-five single-rooted human teeth were cleaned and prepared using a step-back technique. The apical third of each root was resected perpendicularly to the long axis direction. All teeth were obturat...
متن کاملEffect of Sealing Gas Washer Design on a PEM Stack Fuel Cell Performance
In this paper we study the performance of a PEM stack fuel cell after 900 hours of operation. We tried to identify any voltage degradation and its causes. Microscopic cracks on some parts of MEA mainly due to uniformity of pressure, stress concentration and elongation of membrane in the edge of GDL has been identified as the most important cause of this gradual degradation. High contact resista...
متن کاملRetreatability of a bioceramic root canal sealing material.
INTRODUCTION The efficacy of retreatment techniques for BC Sealer (BCS) (Brasseler USA, Savannah, GA) removal has not yet been assessed. The purpose of this study was to evaluate the efficacy of solvent and rotary instrumentation in the removal of BCS when used in combination with gutta-percha (GP) as compared with AH Plus sealer (Dentsply, Tulsa, OK). METHODS The mesiobuccal canals of 40 man...
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ژورنال
عنوان ژورنال: Advances in Materials Science and Engineering
سال: 2018
ISSN: 1687-8434,1687-8442
DOI: 10.1155/2018/8480913