The Effect of Repeated Microwave Radiation on the Dimensional Stability of a Specific Acrylic Denture Resin

Wagner, David (2013) The Effect of Repeated Microwave Radiation on the Dimensional Stability of a Specific Acrylic Denture Resin. Master's Thesis, University of Pittsburgh. (Unpublished)

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Abstract

Objective: The premise of this study was to determine the dimensional stability of a polymethyl methacrylate (PMMA) acrylic resin when subjected to multiple sessions of repeated microwave radiation at two different powers, 700 Watts, and 420 Watts.

Materials and Methods: Two groups each of ten standardized denture bases (N=20 in total) were fabricated using PMMA acrylic resin. Points of measurement were marked on the denture bases using a standardized template. A base measurement of each denture bases was recorded. The denture bases were randomly selected into two experimental groups. The first group of 10 denture bases were subjected to two periods of microwave radiation, 700 Watts for 3 minutes in 200 ml of room temperature deionized water. The second group of 10 denture bases were subjected to 420 Watts of microwave radiation for 3 minutes in 200 ml of room temperature deionized water. Measurements of each denture base were recorded after each period of microwave radiation. Dimensional changes were analyzed using a Student’s t-test.

Results: All denture bases experienced approximately 1.0-2.0 mm of deformation in all recorded measurements after each period of microwaving. Results were very significant with all t-test having values of p<0.05.

Conclusion: It maybe concluded that the denture bases deformed a significant amount under experimental conditions at either 700 Watts for 3 minutes in 200 ml of water or 420 Watts for 3 minutes in 200 ml of water.

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Details

Item Type:	University of Pittsburgh ETD
Status:	Unpublished
Creators/Authors:	Creators Email Pitt Username ORCID Wagner, David daw100@pitt.edu DAW100
ETD Committee:	Title Member Email Address Pitt Username ORCID Committee Chair Pipko, Donald djp4@pitt.edu DJP4 Committee Member Engelmeier, Robert rle14@pitt.edu RLE14 Committee Member Azarbal, Mohsen moa5@pitt.edu MOA5 Committee Member Almarza, Alejandro aja19@pitt.edu AJA19 Committee Member Barnard, John jbarnard@pitt.edu JBARNARD
Date:	8 July 2013
Date Type:	Publication
Defense Date:	23 May 2013
Approval Date:	8 July 2013
Submission Date:	11 June 2013
Access Restriction:	5 year -- Restrict access to University of Pittsburgh for a period of 5 years.
Number of Pages:	96
Institution:	University of Pittsburgh
Schools and Programs:	School of Dental Medicine > Dental Science
Degree:	MDS - Master of Dental Science
Thesis Type:	Master's Thesis
Refereed:	Yes
Uncontrolled Keywords:	Denture, Acrylic, Resin, Microwave, Radiation
Date Deposited:	08 Jul 2013 14:45
Last Modified:	08 Jul 2018 05:15
URI:	http://d-scholarship.pitt.edu/id/eprint/18943

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