The transmittance of gingival porcelain increased after repeated firing.
2．随着烧结次数的增多，牙龈色瓷材料的透射率逐渐升高。
参考来源 - 牙龈色瓷的半透性及色度学实验研究Sometimes, the metal-ceramic restorations are modified many times in order to achieve proper color and form after finished. The initial color and translucency of gingival porcelain may be changed because of repeated-firing.
金瓷修复体制作完成后，往往还因颜色及外形上的调整而多次修改，特别是颜色不易修复的牙龈组织，技师在配色过程中，有时需要多次烧结，这可能会使牙龈瓷的初始颜色发生变化。
参考来源 - 牙龈色瓷的半透性及色度学实验研究·2,447,543篇论文数据，部分数据来源于NoteExpress
Objective To evaluate the esthetic effect of anterior PFM (Ni-Cr Alloy) crowns with gingival porcelain.
目的评价颈缘瓷在前牙镍铬合金烤瓷全冠修复中的临床美学效果。
The mental-porcelain crowns are the most familiar method in clinical restoration and the key-point of successful restoration is its aesthetics effects of the gingival health to the mental-porcelain.
金属烤瓷冠是临床最常见的修复方法，烤瓷冠的牙龈健康状况及其美学效果是判断修复体是否成功的关键。
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