Which material is most likely to experience a galvanic reaction with a gold superstructure?

Prepare for the AAID Associate Fellow Exam with flashcards and multiple-choice questions. All questions include hints and explanations. Enhance your study experience and gain confidence for your exam.

A gold superstructure is a type of dental or medical implant often used in conjunction with other metallic materials. In the context of galvanic reactions, these occur due to the electrochemical interaction between dissimilar metals in the presence of an electrolyte, leading to corrosion.

CP titanium, or commercially pure titanium, is known for its excellent biocompatibility and resistance to corrosion, particularly in the presence of bodily fluids. However, when paired with gold, titanium can indeed participate in a galvanic reaction. This is largely due to the differences in their electrochemical potentials. CP titanium has a more negative potential compared to gold, which can lead to the titanium acting as the anode, therefore experiencing corrosion while the more noble metal (gold) remains relatively unaffected.

In contrast, stainless steel, nickel-chromium alloy, and Co-Cr alloy also have their own electrochemical behaviors, but they are generally less reactive in a galvanic sense when paired with gold compared to CP titanium. These materials tend to be more resistant to corrosion when involved in galvanic coupling with noble metals since they often possess higher hardness and corrosion resistance.

Thus, the probability of a galvanic reaction occurring is highest with CP titanium when used alongside a gold superstructure, making it the

Subscribe

Get the latest from Examzify

You can unsubscribe at any time. Read our privacy policy