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Effects of metal combinations on cytotoxicity evaluation using a dynamic extraction method.
S Takeda1, M Akiyama, K Sakane
1Department of Biomaterials, Osaka Dental University, 8-1, Kuzuhahanazono-cho, Hirakata-shi, Osaka 573-1121, Japan.
Dental Materials Journal
|January 31, 2002
Summary
Metal combinations impact cytotoxicity. Titanium combined with Nickel-Chromium alloys significantly reduced cell viability, unlike other combinations, suggesting dynamic extraction tests for new metal pairings.
Area of Science:
- Biomaterials Science
- Materials Science
- Toxicology
Background:
- Assessing the cytotoxicity of metal combinations is crucial for biomedical applications.
- Understanding ion release and its effects on cells is essential for material safety.
Purpose of the Study:
- To evaluate the cytotoxicity of various metal combinations under dynamic extraction conditions.
- To investigate the influence of dissimilar metal interactions on cell viability.
Main Methods:
- Dynamic extraction using freely gyrating spherical metals in a glass vessel.
- Assessing cell viability following exposure to metal extracts.
- Testing combinations of gold (Au) alloy, silver-palladium-gold (Ag-Pd-Au) alloy, titanium (Ti), cobalt-chromium (Co-Cr), and nickel-chromium (Ni-Cr) alloys.
Main Results:
- Au and Ag-Pd-Au alloys showed minimal cytotoxicity in combination with each other or Ti.
- Precious alloys combined with Co-Cr or Ni-Cr alloys resulted in 60-80% cell viability.
- Titanium (Ti) exhibited varied cytotoxicity; Ti/Co-Cr maintained viability, while Ti/Ni-Cr drastically reduced it below 20%.
Conclusions:
- Dynamic extraction simulating mutual dynamic contact of dissimilar metals is a viable method for evaluating cytotoxicity.
- The combination of Ti and Ni-Cr alloys presents a significant cytotoxic risk.
- Careful consideration of metal pairings is necessary to predict and mitigate adverse biological responses.