Mechanical characteristics and surface elemental composition of a Yasargil titanium aneurysm clip after long-term implantation.
The mechanical properties of titanium-alloy aneurysm clips after long-term implantation in the human cranium are unclear. The characteristics of a Yasargil titanium aneurysm clip were evaluated after long-term implantation for 12 years in a patient with a cerebral aneurysm. The closing forces of the retrieved clip before and after implantation were approximately equal. The bending test showed no differences between the retrieved and control clips. Titanium oxide and calcium were identified on the surface of the retrieved clip, which indicated the formation of corrosion-resistant layers. Titanium-alloy clips retain their mechanical properties in the human cranium for a long time.
Otawara
Yasunari
Y
Department of Neurosurgery, Iwate Medical University, Morioka, Japan.
Ogasawara
Kuniaki
K
Kashimura
Hiroshi
H
Kubo
Yoshitaka
Y
Ogawa
Akira
A
Watanabe
Kouichi
K
D000368:Aged; D000497:Alloys; D001696:Biomechanical Phenomena; D019544:Equipment Failure Analysis; D005500:Follow-Up Studies; D006801:Humans; D007223:Infant; D002532:Intracranial Aneurysm / Q000601:surgery*; D056951:Photoelectron Spectroscopy; D019736:Prostheses and Implants; D013499:Surface Properties; D013525:Surgical Instruments; D014025:Titanium
D000497:Alloys; C031462:titanium alloy (TiAl6V4); D014025:Titanium