目的评价上颌部动静脉畸形的PVA 永久性栓塞治疗。

Objective To evaluate the embolization of arteriovenous malformations of the maxillary region with PVA.

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这两位研究人员表示，在打哈欠时，上颌窦的壁部(位于鼻子两边的脸颊上)像风箱一样弯曲，帮助大脑降温。

During yawning, the walls of the maxillary sinuses (located in the cheeks on each side of the nose) flex like bellows and help with brain cooling, according to the researchers.

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在上颌，基牙的分布情况不允许做不覆盖腭部的设计。

In the maxilla, the abutment distribution did not allow a palatal-free restoration.

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