The number of cases of anti‐resorptive agent‐related osteonecrosis of the jaw (ARONJ) is on the increase in our aging society. Although it has been almost 16 years since the first report of ARONJ was published, treatment strategies have not been clearly established and there is still controversy about treatment methods. We reviewed treatment methods and outcomes of patients with ARONJ in this retrospective study, and analyzed the clinical data of 30 patients diagnosed with ARONJ and treated at the department of oral surgery at a hospital in Kyoto Prefecture between April 2013 and March 2018. Among the 30 patients, remission was achieved in 16 (53%) and non‐remission in the other 14 (47%). The surgical treatment was a significant factor in the remission group (p<0.05). In the surgical treatment group, the remission rate was greater in patients who underwent extensive surgery, which removes the surrounding bone as well as necrotic bone, than in patients who underwent conservative surgery, which removes only the necrotic bone (p<0.05). These results confirm that surgical treatment is effective for ARONJ, and that extensive surgery may be more effective than conservative surgery. Shika Igaku (J Osaka Odontol Soc) 2020; Mar; 83(1):1-7.

The treatment of cases of tongue carcinoma have been increasing in our hospital. Nutritional support by the nasogastric tube (NGT) is important in the management of postoperative patients. At present, we insert an NGT in 70% of the patients undergoing tongue resection operations under general anesthesia. It should be inserted into the stomach to maximize benefit and minimize risk. A malpositioned NGT may cause such problems as pneumonia, which can be fatal, and pneumothorax. Fortunately, this has never happened in this hospital. In this study, radiographs, which are the best method to verify the position of the NGT, showed that 96% of the insertions were in the stomach. However, it is necessary to further decrease errors to prevent medical accidents. While doing this study, we noticed that information related to the NGT was incomplete in the anesthetic records. The method of verification of placement of the NGT inserted during anesthesia was only recorded in 3% of the records. We recommend that the position should be confirmed by a combination of radiographs and another method, but not auscultation. We also recommend a format for recording details related to the NGT to assure medical safety. Shika Igaku (J Osaka Odontol Soc) 2020; Mar; 83(1):8-13.

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