Defense Date

2002

Document Type

Thesis

Degree Name

Master of Science

Department

Endodontics

First Advisor

Dr. Gary Hartwell

Abstract

AbstractTHE PLACEMENT OF MINERAL TRIOXIDE AGGREGATE USING TWO DIFFERENT TECHNIQUESBy Anita Aminoshariae, D.D.S.A thesis submitted in partial fulfillment of the requirements for the degree of Master of Science at Virginia Commonwealth UniversityVirginia Commonwealth University, 2003Major Director: Gary R. Hartwell, D.D.S., M.S.Chairman and Professor, Department of EndodonticsThe purpose of this study was to determine if the adaptation of Mineral Trioxide Aggregate (MTA) to the walls of the samples would differ when placed into simulated root canals of varying length using two different placement and condensation methods. Hand condensation was compared to ultrasonic condensation. Eighty polyethylene tubes were divided into four groups of twenty tubes each. The tubes in the four groups were prepared to receive 3, 5, 7 and 10-mm lengths of MTA respectively. Each group of twenty tubes was then subdivided so that ten samples of each length would have MTA placed and condensed by the hand method and the other ten by the ultrasonic method. After condensation the samples were evaluated with a light microscope and radiographs for the degree of adaptation of the MTA to the tube walls and for the presence of voids within the MTA material itself. The results demonstrated an 80% agreement for findings between the light microscopy and radiographic evaluation. Hand condensation resulted in better adaptation to the tube walls and less voids than the ultrasonic method. There was no significant difference in the results for any of the four lengths of MTA placed by the hand method (p> 0.9). At this time hand condensation should be considered the preferred method for placement of MTA.

Rights

© The Author

Is Part Of

VCU University Archives

Is Part Of

VCU Theses and Dissertations

Date of Submission

June 2008

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