檢視上颌窦的原始碼

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[[File:U=647383024,3754254507&fm=26&gp=0.jpg|缩略图|居中|[https://timgsa.baidu.com/timg?image&quality=80&size=b9999_10000&sec=1606997011960&di=e77be250d243776031729215116be8a1&imgtype=0&src=http%3A%2F%2F5b0988e595225.cdn.sohucs.com%2Fimages%2F20180129%2F7e4dbd7defa649129c2e3edc806e1081.jpeg 原图链接][https://image.baidu.com/search/detail?ct=503316480&z=0&ipn=d&word=%E4%B8%8A%E9%A2%8C%E7%AA%A6&step_word=&hs=0&pn=1&spn=0&di=202950&pi=0&rn=1&tn=baiduimagedetail&is=0%2C0&istype=0&ie=utf-8&oe=utf-8&in=&cl=2&lm=-1&st=undefined&cs=647383024%2C3754254507&os=1456249139%2C4084851183&simid=4249329744%2C746262631&adpicid=0&lpn=0&ln=1289&fr=&fmq=1606986924844_R&fm=&ic=undefined&s=undefined&hd=undefined&latest=undefined&copyright=undefined&se=&sme=&tab=0&width=undefined&height=undefined&face=undefined&ist=&jit=&cg=&bdtype=0&oriquery=&objurl=http%3A%2F%2Fwww.da-quan.net%2Fuppic%2Fhttp%3A%2F%2F5b0988e595225.cdn.sohucs.com%2Fimages%2F20180129%2F7e4dbd7defa649129c2e3edc806e1081.jpeg.jpg&fromurl=ippr_z2C%24qAzdH3FAzdH3Fooo_z%26e3B1w-q7wg_z%26e3BgjpAzdH3Ff5-qy1fvzyqoivxfyzvz1z_z%26e3Bip4s&gsm=2&rpstart=0&rpnum=0&islist=&querylist=&force=undefined 来自 百度 的图片]]]

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上颌窦（maxillary sinus)为上颌骨体内的锥形空腔，窦壁为骨质，大部分为薄的密质骨板，内稍有松质骨，最薄的地方只有密质骨。窦壁直接被覆粘膜，支配牙齿及牙周组织的血管、神经，通行于骨内牙槽管之中或粘膜下。

鼻窦为鼻腔周围含气的骨质空腔，共四对，分别是额窦，蝶窦，筛窦，上颌窦。都有窦口与鼻腔相通，当引流不畅时容易发生炎症。