Kato Tomoki, Watanabe Takuma, Nakao Kazumasa
Department of Oral and Maxillofacial Surgery, Graduate School of Medicine, Kyoto University, 54, Kawahara-cho, Shogoin, Sakyo-ku, Kyoto 606-8507, Japan.
Department of Oral and Maxillofacial Surgery, Graduate School of Medicine, Kyoto University, 54, Kawahara-cho, Shogoin, Sakyo-ku, Kyoto 606-8507, Japan.
J Stomatol Oral Maxillofac Surg. 2023 Dec;124(6):101442. doi: 10.1016/j.jormas.2023.101442. Epub 2023 Mar 16.
The frequency of displacement of a third molar root is low and considered a rare incident. A computer-assisted navigation system is a surgical support system that allows the patient to confirm the surgical site in three dimensions during surgery has recently been introduced to oral and maxillofacial surgery. We used a computer-assisted navigation system to remove a displaced third molar root in the floor of the mouth without complications and report the outline of the procedure and the effectiveness of the computer-assisted navigation system safety. This was a 56-year-old male who underwent extraction of the mandibular right third molar at a referral clinic. At that time, the proximal root fracture remained in the extraction socket, and the distal root fracture displaced to floor of the mouth. The patient was referred to our hospital immediately after tooth extraction. We extracted the displaced third molar root fracture under general anesthesia using a computer-assisted navigation system to accurately locate the root fracture and performed minimally invasive extraction. The root extraction was performed 18 days after the initial tooth extraction. No lingual nerve exposure was observed during surgery. No sensory abnormalities in the lower lip or tongue were observed postoperatively. Computer-assisted navigation system is a useful surgical support system that enables oral and maxillofacial surgical procedures and prevents postoperative complications such as lingual nerve palsy safety.
下颌第三磨牙牙根移位的发生率较低，被视为罕见事件。计算机辅助导航系统是一种手术支持系统，最近已被引入口腔颌面外科，它能让患者在手术过程中从三维角度确认手术部位。我们使用计算机辅助导航系统成功移除了位于口底的移位下颌第三磨牙牙根，且未出现并发症，现将手术过程及计算机辅助导航系统的安全性和有效性进行报告。这是一名56岁男性，在一家转诊诊所拔除了下颌右侧第三磨牙。当时，近中牙根折断留在拔牙窝内，远中牙根折断移位至口底。拔牙后患者立即被转诊至我院。我们在全身麻醉下使用计算机辅助导航系统准确找到牙根折断位置，对移位的第三磨牙牙根折断进行了微创拔除。牙根拔除在初次拔牙后18天进行。手术过程中未观察到舌神经暴露。术后未观察到下唇或舌部感觉异常。计算机辅助导航系统是一种有用的手术支持系统，可确保口腔颌面外科手术顺利进行，并安全预防诸如舌神经麻痹等术后并发症。
