Experimental Study of Piezoelectric Film as Electrical Stimulation to the Bone Repair
1992 Volume 36 Issue 2 Pages 387-395
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1992 Volume 36 Issue 2 Pages 387-395
Recently, the growth of bone induced by electricity has aroused much interest. Applying electrical stimulation to the bone from outside the body produced callus formation. This study is to investigate possibility for dental application of piezoelectric film (Vinylidene Fluoride-Trifluoroethylene copolymers; VDF/TrFE film) as electrical stimulation for the bone repair. The generated electricity of it and electrical Impedance around VDF/TrFE film were meansured in the rat's femur, and calculated the micro-current. The electrode of VDF/Tr FE film was implanted over femur of 5 Wistar strain male rats, and the generated electricity was meansured during activated muscle such as walking or running. On the other hand, applying alternating current to the implanted electrode, the electrical impedance was analyzed by Lissajous figure method and calculated within about 10-100 Hz in frequency. Obtained results as follows:
1. The generated electricity during function were between +1, 531--1, 612 mV.
2. The electrical impedance around the electrods was 9.2-42.9 KΩ between 10-100 Hz in frequency.
3. The micro-current around the film was 3×10-3 μA during function. From these results, it was suggested that VDF/Tr FE film could be applied to the bone repair as a power unit of electrical stimulator.
