Date of Award

Summer 2015

Document Type


Degree Name

Master of Science (MS)



First Advisor

Berzins, David

Second Advisor

Bradley, Thomas

Third Advisor

Liu, Dawei


The aim of this study was to examine the effects of fluoride and stress on the electrochemical properties of nickel-titanium coils. Forty Dentsply GAC NiTi coils were divided into four groups of ten and individually tested. Twenty coils were placed in a solution of artificial saliva, where ten of the twenty were compressed and the other ten were not stressed. The other twenty coils were placed in a 1500 ppm NaF solution, where ten were compressed and ten were not. The coils were connected to a computer driven potentiostat and three tests were conducted: open circuit potential monitoring for 2 hours, a linear polarization scan, and a cyclic polarization test. The results showed the coils to possess a more noble OCP when in artificial saliva compared to fluoride. The non-compressed, artificial saliva group possessed the greatest polarization resistance (p