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Corrosion failure in stainless steel implants.
Surgery, Gynecology & Obstetrics
|August 1, 1975
Summary
Stainless steel implants can fail due to corrosion, leading to adverse tissue reactions. Metallurgic analysis revealed inferior alloys, suggesting a simple magnetic test for early detection of such faulty medical implants.
Area of Science:
- Biomaterials Science
- Materials Engineering
- Orthopedic Surgery
Background:
- Stainless steel implants are widely used in orthopedic surgery.
- Corrosion failure of medical implants can lead to adverse patient outcomes.
- Understanding implant material composition is crucial for preventing failures.
Purpose of the Study:
- To investigate the metallurgic characteristics of failed stainless steel implants.
- To identify the causes of corrosion failure in retrieved implants.
- To propose a method for detecting substandard stainless steel in implants.
Main Methods:
- Surgical retrieval of stainless steel implants from two patients.
- Metallurgic analysis of the failed implants.
- Chemical composition analysis of implant alloys.
Main Results:
- Both retrieved implants exhibited significant pitting corrosion.
- Implants were removed due to adverse tissue reactions.
- Analysis indicated the implants were made from alloys with poor corrosion resistance.
- A simple magnetic test was proposed as a detection method.
Conclusions:
- Substandard stainless steel alloys can lead to implant corrosion failure.
- Adverse tissue reactions are associated with implant corrosion.
- A magnetic test may help identify susceptible stainless steel implants before clinical use.