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Ann Thorac Surg 2007;84:1012-1014
© 2007 The Society of Thoracic Surgeons

Case Reports

Corrosion of Pure Titanium Sternal Wire

Yasuko Tomizawa, MD, PhDa,*, Takao Hanawa, PhDb

a Department of Cardiovascular Surgery, The Heart Institute of Japan, Tokyo Women’s Medical University, Tokyo, Japan
b Institute of Biomaterials and Bioengineering, Tokyo Medical and Dental University, Tokyo, Japan

Accepted for publication April 16, 2007.

* Address correspondence to Dr Tomizawa, Department of Cardiovascular Surgery, The Heart Institute of Japan, Tokyo Women’s Medical University, 8-1 Kawada, Shinjuku, Tokyo, 162-8666, Japan (Email: 4crnry{at}hij.twmu.ac.jp).

Titanium and its alloys are considered reliable materials commonly used in heart surgeries. A patient had severe inflammation at the median sternotomy wound develop after open heart surgery. Sternal wires were removed and were found to be seriously corroded on most of the surface. Energy dispersive spectroscopy identified titanium as the only elemental component of the explanted wire with grade 2 purity, and the polarization curve showed satisfactory corrosion resistance similar to commercial pure titanium. Prolonged inflammation might have caused extensive corrosion of titanium in the present case.




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