Related Experiment Videos
Ions released from dental amalgams in contact with titanium
Shi-Duk Lim1, Yukyo Takada, Kyo-Han Kim
1Department of Dental Technology, Daegu Polytechnic College 395, 3-Manchon-Dong, Susung-Gu, Daegu 706-711, Korea.
Dental Materials Journal
|June 7, 2003
Summary
Titanium contact significantly increases ion release and corrosion from dental amalgams, especially high-copper types, when titanium surface area is large. This suggests galvanic corrosion is a key factor in amalgam degradation.
Area of Science:
- Biomaterials Science
- Corrosion Engineering
- Dental Materials
Background:
- Dental amalgams are widely used restorative materials.
- Titanium is a common implant material.
- Understanding interactions between amalgams and titanium is crucial for long-term clinical success.
Purpose of the Study:
- To quantitatively analyze ion release from conventional and high-copper amalgams in contact with titanium.
- To evaluate the effect of varying titanium/amalgam surface area ratios on corrosion.
- To measure corrosion potentials and analyze amalgam surfaces.
Main Methods:
- Quantitative ion analysis in 0.9% NaCl at 37°C.
- Corrosion potential measurements.
- Scanning Electron Microscopy (SEM) with Wavelength Dispersive Spectrometry (WDS) for surface analysis.
Main Results:
- High-copper amalgam potential reversed and remained lower than titanium initially.
- Tin and copper ion release increased significantly with a 10:1 titanium/amalgam surface area ratio.
- Galvanic corrosion likely caused increased amalgam corrosion.
Conclusions:
- Titanium contact accelerates amalgam corrosion, particularly with larger titanium surface areas.
- Galvanic interactions between titanium and amalgams are significant.
- Material selection and design should consider these electrochemical effects.