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In vitro corrosion behavior and microstructure examination of a gallium-based restorative
E J DeSchepper1, Y Oshida, B K Moore
1Indiana University School of Dentistry, Indianapolis 46202, USA.
Operative Dentistry
|March 4, 1998
Summary
New Galloy dental fillings show higher corrosion than traditional amalgams. Researchers found Galloy corrodes more easily, especially when coupled with Permite amalgam, raising concerns for dental restoration durability.
Area of Science:
- Materials Science
- Biomaterials Engineering
- Corrosion Science
Background:
- Mercury toxicity concerns drive research into alternatives for dental amalgam.
- Gallium-based dental restoratives are being developed as potential replacements for traditional amalgams.
Purpose of the Study:
- To compare the corrosion behavior of a new gallium-based dental restorative, Galloy, with a high-copper amalgam, Permite.
- To analyze the corrosion products formed on Galloy.
Main Methods:
- Anodic polarization behavior testing in deoxygenated Ringer's solution.
- Immersion testing in normal Ringer's solution at 37°C.
- Analysis of corrosion products using energy dispersive X-ray spectrometry and transmission electron diffraction.
Main Results:
- The primary corrosion products of Galloy were identified as alpha-Ga2O3 and SnO2.
- Galloy exhibited more significant corrosion compared to Permite.
- Coupling Galloy with Permite suggested accelerated electrochemical corrosion.
Conclusions:
- Galloy demonstrates a higher susceptibility to corrosion than Permite.
- The findings indicate potential challenges with the long-term durability of Galloy in the oral environment.
- Further research is needed to optimize gallium-based materials for dental applications.