OBJECTIVE: To summarize the research progress of materials research, clinical applications of maxillofacial cone CT and ultrasound bone knife in maxillary sinus augmentation.

目的：总结上颌窦提升在材料研究库、牙颌面专用锥形束CT及超声骨刀在临床中的应用等方面的新进展。

youdao

The hard bone has dulled up the knife blade.

这硬骨头把刀刃弄钝了。

youdao

A painter can have gongfu. Or the butcher who cuts meat every day with such skill... his knife never touches bone.

画家有他的功夫，可以用指尖作画，杀猪的也有他的功夫，切肉可以不沾到骨头！

youdao

Now she walked more deliberately, but with a bone-handled carving knife ready in her pocket.

ECONOMIST: Dame Beryl Bainbridge, novelist, died on July 2nd, aged 77

The cost-cutting knife has also hit bone.

ECONOMIST: German universities