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上颌窦的底壁是上颌牙槽突的组成部分。根据丁氏研究牙根与上颌窦的关系时指出,上颌后牙与上颌窦底相通者约20%以上。通窦底的牙根一般右侧多于左侧,第一磨牙多于第二磨牙,再次为第二双尖牙;各牙根中以第一、第二磨牙的腭侧根最多见,其次为近中颊根与远中颊根,再次为第二双尖牙的牙根。在临床上拔除上述牙齿如发生牙根折断,可在取断根时因使用器械不当,而致把断根推入上颌窦底,如不及时取出可导致急慢性上颌窦炎。这时可有局部不适或引起头痛不安;但亦可断根被纤维结缔组织包围,在相当长时间内不引起任何炎症。在处理断根进入上颌窦时,最好先作常规照口腔内X线片,或加照副鼻窦正侧位片,以确定断根位于窦底还是在窦腔内,供手术参考。处理方法介绍如下:
The bottom wall of the maxillary sinus is part of the maxillary alveolar process. According to Ding's study of the relationship between the root and the maxillary sinus, the maxillary posterior teeth and maxillary sinus were about 20% or more. The root of the common sinus root more than the right side of the left, the first molar than the second molar, again for the second pair of canines; each tooth root to the first and second molars palatal root is the most common, followed by near-middle Buccal root and far from the buccal root, once again for the second bicuspid tooth root. Clinically in the removal of the above teeth, such as the occurrence of root fracture, can be taken in the root due to improper use of equipment, which caused by the root into the maxillary sinus, if not removed in time can lead to acute and chronic maxillary sinusitis. At this time there may be some discomfort or cause headache, but also can be broken roots surrounded by fibrous connective tissue, for a long period of time does not cause any inflammation. In dealing with the root cut into the maxillary sinus, it is best to make a routine as usual oral X-ray film, or plus the paranasal sinus lateral film to determine whether the root of the root in the sinus or sinus, for surgical reference. Processing methods are described below: