PFM全冠肩台的宽度一般为A:1.0mm B:1.5mm C:2.0mm D:0.5mm E:2.5mm

作者: tihaiku 人气: - 评论: 0

问题 PFM全冠肩台的宽度一般为

选项 A:1.0mm B:1.5mm C:2.0mm D:0.5mm E:2.5mm

答案 A

解析在对髓腔较大的年轻患者做牙体预备时，特别是在做牙颈部磨除时，尤其应注意手术对牙髓的损害，金属烤瓷全冠(PFM)唇侧预备1.2～1.5mm间隙，而肩台宽度只需1.0mm，所以A正确。考生只需记住：金属强度大，肩台要求小，只需0.5mm。烤瓷稍差，肩台要求宽，需1.0mm。

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