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.
| Identifer | oai:union.ndltd.org:PITT/oai:PITTETD:etd-06112009-101109 |
| Date | 11 January 2010 |
| Creators | Massih, Karmen |
| Contributors | John M. Close, Maria K. Tassopoulou-Fishell, Varun Kalra, Roy D. Marangoni |
| Publisher | University of Pittsburgh |
| Source Sets | University of Pittsburgh |
| Language | English |
| Detected Language | English |
| Type | text |
| Format | application/pdf |
| Source | http://etd.library.pitt.edu/ETD/available/etd-06112009-101109/ |
| Rights | unrestricted, I hereby certify that, if appropriate, I have obtained and attached hereto a written permission statement from the owner(s) of each third party copyrighted matter to be included in my thesis, dissertation, or project report, allowing distribution as specified below. I certify that the version I submitted is the same as that approved by my advisory committee. I hereby grant to University of Pittsburgh or its agents the non-exclusive license to archive and make accessible, under the conditions specified below, my thesis, dissertation, or project report in whole or in part in all forms of media, now or hereafter known. I retain all other ownership rights to the copyright of the thesis, dissertation or project report. I also retain the right to use in future works (such as articles or books) all or part of this thesis, dissertation, or project report. |
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