Part the hair down the middle from the forehead to the crown of the head, and pin the sections into place using bobby pins or hair clips.
将前额至公主头的中间部分向下梳，把这部分头发别到第一步中别过发卡的位置。
2
Artifacts produced by retention pin, nickel chromium crown and so on were less severe on fast spin-echo.
牙用固位钉、镍铬合金冠等材料在快速自旋回波图像上伪影减轻。
3
Objective: To evaluate the clinical of using prefabricated cylindrical root canal pin to lengthen the clinical crown and restoring anterior tooth and premolar defect with PFM.