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THE EFFECT OF CASEIN PHOSPHOPEPTIDE-AMORPHOUS CALCIUM PHOSPHATE ON LOAD-DEFLECTION PROPERTIES OF BETA-TITANIUM WIRES USED IN ORTHODONTICS

Massih, Karmen (2010) THE EFFECT OF CASEIN PHOSPHOPEPTIDE-AMORPHOUS CALCIUM PHOSPHATE ON LOAD-DEFLECTION PROPERTIES OF BETA-TITANIUM WIRES USED IN ORTHODONTICS. Master's Thesis, University of Pittsburgh. (Unpublished)

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Abstract

Objective: The objective of this in vitro study was to determine the effect of casein phosphopeptide-amorphous calcium phosphate (CPP-ACP) on the load-deflection properties of beta-titanium wires, specifically loading and unloading flexural modulus and yield strength. Materials and Methods: Ten 0.017 x 0.025 inch beta-tianium wires each from five companies were tested, using a three-point bend test apparatus, for a total of 50 control and 50 experimental samples. The experimental wires were exposed to MI Paste (CPP-ACP) for nine hours, to simulate three months of six-minute MI Paste application, before bend-testing in a water tank of 37 degrees Celsius, while the control wires were exposed to distilled water for nine hours before testing. A 2x5 multivariate analysis of variance was conducted to analyze the data. Results: There were no statistically significant differences between the control group and experimental group for loading elastic modulus, 0.2% offset yield strength, or unloading 0.2% offset yield strength. There was a statistically significant difference for unloading flexural modulus, but it is most likely not a clinically significant difference, given there was a 1.92% difference between the control and MI paste group. Conclusions: The results of this study suggest that CPP-ACP does not have any clinically significant effects on beta-titanium wires for the load deflection properties tested.


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Details

Item Type: University of Pittsburgh ETD
Status: Unpublished
Creators/Authors:
CreatorsEmailPitt UsernameORCID
Massih, Karmenkam130@pitt.eduKAM130
ETD Committee:
TitleMemberEmail AddressPitt UsernameORCID
Committee ChairKalra, Varunvkalra@aol.com
Committee MemberClose, John M
Committee MemberTassopoulou-Fishell, Maria K
Committee MemberMarangoni, Roy D
Date: 11 January 2010
Date Type: Completion
Defense Date: 8 April 2009
Approval Date: 11 January 2010
Submission Date: 11 June 2009
Access Restriction: No restriction; Release the ETD for access worldwide immediately.
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: Bend-testing; Beta-titanium wires; CPP-ACP; MI Paste; White spot lesions
Other ID: http://etd.library.pitt.edu/ETD/available/etd-06112009-101109/, etd-06112009-101109
Date Deposited: 10 Nov 2011 19:46
Last Modified: 15 Nov 2016 13:44
URI: http://d-scholarship.pitt.edu/id/eprint/8077

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