Battraw G A, Szivek J A, Anderson P L
Department of Surgery, University of Arizona, Tucson, USA.
J Biomed Mater Res. 1999 Spring;48(1):32-5. doi: 10.1002/(sici)1097-4636(1999)48:1<32::aid-jbm7>3.0.co;2-x.
Although strain transfer from bone to gauge has been used as an indication of the extent of bone bonding to calcium phosphate ceramic (CPC) coated strain gauges, interface strength measurements have not been reported. In order to develop bone-bonded gauges that remain attached to bone surfaces for long periods, the strength of the CPC-bone interface must be optimized. A shear test to assess the interface strength of the CPC-bone interface was developed using the femora of 120-day-old male rats. The mean interface strength of a blended CPC coating bonded to the femora of the rats for 6 weeks in vivo was 4.8+/-2.4 MPa, and one specimen achieved a strength of nearly 10 MPa. This mean strength value is higher then the CPC-gauge interface strength reported in early studies, but it is lower than recently developed heat treated CPC-gauge interfaces that have average strengths of approximately 7.0+/-2.0 MPa.
尽管从骨骼到应变片的应变传递已被用作骨骼与磷酸钙陶瓷（CPC）涂层应变片之间骨结合程度的一个指标，但尚未有界面强度测量的相关报道。为了开发能长时间附着在骨表面的骨结合应变片，必须优化CPC-骨界面的强度。利用120日龄雄性大鼠的股骨开发了一种剪切试验，以评估CPC-骨界面的强度。在体内与大鼠股骨结合6周的混合CPC涂层的平均界面强度为4.8±2.4兆帕，有一个样本的强度接近10兆帕。这个平均强度值高于早期研究报道的CPC-应变片界面强度，但低于最近开发的热处理CPC-应变片界面，后者的平均强度约为7.0±2.0兆帕。
