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下颌智齿,特别是低位阻生智齿的牙根与下颌管毗邻,有时仅为一板之隔,有的则牙根位于下颌管内,据Howe等对下颌第三磨牙与下颌管的研究,发现术中经拔牙创可观察到下齿槽神经血管束者,其发生率为7.45‰。因此,在拔除下颌阻生智齿时,应尽量避免牙根折断,万一断根,有可能坠入下颌管。 1.断根坠入下颌管后的最初症状有触电感,牙槽窝深,渗血明显。 2.注意事项: (1)术者及患者均应保持镇静,嘱咬棉球暂时压迫止血。分析断根位置,必要时拍片定位。
The mandibular wisdom teeth, especially the lower resistance wisdom teeth tooth root adjacent to the mandibular canal, and sometimes only a plate across, while the root is located in the mandibular canal, according to Howe et al on the mandibular third molar and mandibular study and found that surgery Tooth extraction was observed under the alveolar nerve vascular bundle, the incidence was 7.45 ‰. Therefore, removal of mandibular impacted wisdom teeth, should try to avoid the root breakage, if the root, may fall into the mandibular canal. 1. The first symptoms after sinking the mandibular tube are electric shock, the socket is deep and the bleeding is obvious. 2. Matters needing attention: (1) Surgery and patients should be kept calm, told bite cotton ball temporary compression to stop bleeding. Analysis of root position, if necessary, film positioning.