方法：鼻窦镜穿刺套管针分别从下鼻道、尖牙窝穿刺，在鼻内窥镜直视下切除上颌窦病变；
Methods To puncture from inferior nasal meatus and canine fossa with a nasal endoscopic needle, then, to cut away the pathological tissue of maxillary sinus under the endoscopic observation.
大多数牙医建议封闭恒牙的磨牙和双尖牙，因为磨牙的窝沟比较深，乳牙通常不用做窝沟封闭。
Most dentists recommend the permanent molars and premolars to be sealed because these are the teeth that have the deepest grooves.
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