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(Unpublished)
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Unpublished |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: |
|
| ETD Committee: |
| Title | Member | Email Address | Pitt Username | ORCID |
|---|
| Committee Chair | Kalra, Varun | vkalra@aol.com | | | | Committee Member | Close, John M | | | | | Committee Member | Tassopoulou-Fishell, Maria K | | | | | Committee Member | Marangoni, Roy D | | | |
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| 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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