This rhomboid shaped crystal of calcium pyrophosphate, which appears bluish-white (weak positivebirefringence) by polarized light with red plate.
焦磷酸钙菱形结晶在红感光板偏振光下呈蓝白色(弱正双折射)。
2
Results Polarized light microscope showed that the enamel surface of the experimental group were completed, the areas of positivebirefringence were decreased obviously.