目前无论是从改进临床技术操作还是喷涂陶瓷于种植体颈部以及陶瓷基桩等方法来改善前牙区灰色，都存在一定的问题。

At present, all methods exist in some problems, no matter the advanced clinical operate or spraying ceramic on dental implant neck and ceramic abutment etc.

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从生物相容性的角度考虑，羟基磷灰石(HA)是人体硬组织置换种植体最适合的陶瓷材料。

Hydroxyapatite seems to be the most suitable ceramic material for hard tissue replacement implants from the point of view of biocompatibility.

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