PIEZOELECTRIC CERAMIC IMPLANTS - A FEASIBILITY STUDY
PIEZOELECTRIC CERAMIC IMPLANTS - A FEASIBILITY STUDY
复制标题
DOI：
10.1002/jbm.820140308
复制
发表时间：
1980-01-01
期刊：
影响因子：
--
通讯作者：
GRETHER, MF
中科院分区：
文献类型：
--
作者：
PARK, JB;RECUM, AFV;GRETHER, MF
压电陶瓷已被研究作为硬组织的直接替代物。将钛酸钡（BaTiO 3）粉末粉浆浇铸并在1430°C下烧制2小时，然后通过极化制成压电体。在股骨中段皮质中植入16天和86天后，将股骨和测试样本切成约4 cm长。在1 Hz的循环负载下测量其电压输出。当前结果表明，在445 N（100 lbs.）的载荷下植入16天，植入物表面的电压梯度为0.15 mV/mm。即可.这反过来又会在16天植入的相邻区域中产生约0.01 μA的电流。与具有相同负载大小的16天植入物相比，86天植入物显示出更高数量级的电压输出。这可能是由于通过植入物的“负载转移”效率，因为电压输出与转移到植入物的实际负载成正比。骨植入物界面越成熟，通过植入物发生的负载转移越好，导致更高的电压输出。
A piezoelectric ceramic has been investigated as a direct substitute for hard tissues. Barium titanate (BaTiO3) powder was slipcast and fired at 1430°C for 2 hr, then made piezoelectric by polarizing. After 16 and 86 days of implantation in the cortex of the femoral midshafts, the femora with test specimens were sectioned into about 4‐cm lengths. Their voltage outputs were measured under cyclic load at 1 Hz. The present results show that the voltage gradient at the implant surface is 0.15 mV/mm for the 16‐day implantation with a 445‐N (100‐lbs.) load. This in turn can give rise to about 0.01 μA current flow in the adjacent area of the 16‐day implant. The 86‐day implant showed an order of magnitude higher voltage output compared to the 16‐day implant with the same magnitude of loads. This is probably due to the “load‐transfer” efficiency through the implants, since the voltage output is directly proportional to the actual load transferred to the implant. The more bone implant interface matures, the better the load transfer occurs through the implant, resulting in higher voltage output.