A.進(jìn)行牙體預(yù)備之后進(jìn)行比色效果較好 B.天然牙面及比色板牙面要吹干 C.比色前醫(yī)生眼睛先注視淺黃背景物體數(shù)秒鐘 D.對(duì)比色結(jié)果無(wú)十分把握時(shí),應(yīng)選用比同名牙或相鄰牙明度偏低、色彩偏淡的比色片 E.以上說(shuō)法都正確