著者
鳥井 浩平 誉田 栄一 北 研二
出版者
特定非営利活動法人 日本歯科放射線学会
雑誌
歯科放射線 (ISSN:03899705)
巻号頁・発行日
vol.62, no.1, pp.24-34, 2022 (Released:2022-10-04)
参考文献数
24

Research and development of AI-based diagnostic systems in the medical and dental fields is flourishing worldwide. However, there are few practical dental support systems and dental databases. Support for medical record input is needed to reduce the burden at diagnosis. We have been developing a dental database with detailed annotation information and building an AI system for automatic teeth detection, teeth numbering, teeth contour estimation, and disease diagnosis from panoramic X-ray images since 2019. Three dentists and one expert of dental radiology created our database, which includes teeth number based on FDI method, coordinates of teeth contour, and various dental conditions, using Anotee, a software developed for creating dental databases. Our system consists of multiple deep neural networks that were trained using 1,781 panoramic X-ray images and annotations, which excluded deciduous teeth and rare dental conditions. The deep neural network to classify dental conditions is based on EfficientNetV2-S and can diagnose multiple dental conditions. To verify our system’s usefulness, we evaluated two dental condition classifications for 20 dental conditions and 10 dental conditions such as caries, periodontitis, root canal filling, inlay, composite resin, crown, pontic, implant, and impacted tooth. We performed 5-fold cross validation and calculated precision, sensitivity, and specificity. Experimental results were encouraging. For the diagnosis of 20 conditions, precision was 90.4%, sensitivity was 86.1%, and specificity was 99.4%; for the diagnosis of 10 conditions, precision was 92.9%, sensitivity was 90.0%, and specificity was 99.1%. The system achieved high accuracy, suggesting that AI systems are useful in assisting medical record input support.
著者
吉田 みどり 誉田 栄一
出版者
お茶の水医学会
雑誌
お茶の水醫学雑誌 (ISSN:04724674)
巻号頁・発行日
vol.66, no.2, pp.227-245, 2018-10-20

福島原発の事故前後で国民の放射線に対する関心が大きく変化した.また大部分の原発は再稼働の目安が立たず,電力政策の変更を余儀なくされた.最終的には国民の判断に委ねられるが,放射線教育は30 年にわたり初等教育で行われなかったため,多くの人々は知識が不十分な状態にある.政府はこの問題解決の一つとして,初等・中等教育用の放射線副読本を作成した.しかし専門家からみて,むずかしい語句が多く問題を感じた.将来X 線を日常的に扱う歯学部学生を対象とし,副読本の理解度を調べた結果,十分に理解できていないことが判明し,初等・中等教育における放射線教育の方法を再考する必要があると結論づけられた.また多くの報告から放射線教育者の育成が早急に望まれることも判明した.本総説の目的は,放射線教育の歴史を振り返り,現在の国民の放射線に対する知識の現状,そして福島原子力発電所の事故と放射線との関係を知ってもらうことである.Since the Fukushima Dai-ichi nuclear disaster in 2011, Japanese people's interest in radiation has dramatically changed.After the incident, most nuclear power plants were switched off and they have not yet resumed operation.This has forced the Japanese government to alter the electric energy policy.Although the energy policy is dependent on public opinion, the general public has little knowledge of radiation and atomic power, because radiation education has not been taught in elementary or secondary schools for approximately 30 years.Hence, the government has created two supplementary texts on radiation—one for elementary school students, and the other for middle and high school students.As radiation experts, however, we felt that many phrases used in the texts were too difficult, and therefore, we launched a survey to gauge dental students' understanding of the texts, as dental students will routinely use X-rays as part of their work.The survey revealed that the dental students did not fully understand the phrases in the supplementary text for elementary school students.Thus, the method of radiation education needs to be rethought.Furthermore, reports on the radiation knowledge questionnaire helped us realize that radiation knowledge is scarce among high school and university students.There were previously very few teachers who could teach about radiation in junior-high and high schools, and this skill is highly desired.The purpose of the review is to reconsider the history of Japanese radiation education in elementary and secondary schools, to update the current status of public knowledge of radiation, and to explain the status of radioisotopes in the Fukushima Dai-ichi nuclear disaster.
著者
小野 卓史 細道 純 渡 一平 誉田 栄一
出版者
東京医科歯科大学
雑誌
基盤研究(B)
巻号頁・発行日
2014-04-01

口呼吸患者は、口腔内乾燥とともに味覚の異常をしばしば訴える。口呼吸による睡眠呼吸障害が神経系の発育障害および機能障害を惹起することが知られているが、これまで口呼吸に伴う味覚障害の機序について検討された報告はなく、口呼吸が味覚情報処理機構に及ぼす影響やその経路については未知である。本研究では、口呼吸の味覚障害への関与を明らかにすることを目的に、口呼吸患者を対象とした臨床調査および動物モデルを用いた基礎研究を実施する。臨床調査により、慢性口呼吸者における味覚閾値の上昇が生じ、片側鼻閉ラットでは、舌味覚受容体の退行性変化が認められた。したがって、呼吸障害が味覚機能に影響を与える可能性が示唆された。
著者
誉田 栄一 倉林 亨 吉田 みどり
出版者
特定非営利活動法人 日本歯科放射線学会
雑誌
歯科放射線 (ISSN:03899705)
巻号頁・発行日
vol.57, no.1, pp.1-9, 2017 (Released:2017-09-29)
参考文献数
16

MRI is a method which locates NMR(nuclear magnetic resonance)signal and creates an image. The method of the positioning is different from that of CT imaging.Transmission and receive coils are used for handling electromagnetic wave in MRI. And 3-dimensionally independent three coils for application of gradient are equipped. One of the three coils is for slice selection of a patient, and the rest 2 coils are for locating signal on the 2-dimensional slice. This review explains the principle of image formation in MRI.
著者
市川 哲雄 誉田 栄一 矢儀 一智 南 憲一
出版者
徳島大学
雑誌
挑戦的萌芽研究
巻号頁・発行日
2015-04-01

アンケート調査でフレイル得点もオーラルフレイル得点も年齢とともに一様の増加傾向を示した.歯が悪いこと,唾液,食べこぼしがフレイル得点に関係していた.食生活と摂食行動は 40歳以降で適正な方向に推移した.オトガイ舌骨筋断面積と開口力,舌圧,嚥下の持続時間に比例し,筋量と咀嚼・嚥下機能との関連性が示された.咬合支持喪失群においては,速筋化が見られた.生体電気インピーダンス分析で,上腕と咬合力に相関が,舌圧は認められなかった.以上の結果,筋量関係が最も有効であり,バイオマーカーとしても筋量を示す指標が重要であり,当初予想した速筋,遅筋等の運動速度については指標になり得る知見は得られなかった.
著者
宗像 源博 塩田 真 誉田 栄一 立川 敬子 春日井 昇平 倉林 亨
出版者
公益社団法人 日本口腔インプラント学会
雑誌
日本口腔インプラント学会誌 (ISSN:09146695)
巻号頁・発行日
vol.17, no.2, pp.196-201, 2004-06-30 (Released:2015-02-10)
参考文献数
19

Evaluation of jawbone quality is very important for successful implant treatment; however, a method to evaluate bone quality of the jaw has not been established. Furthermore, at present, bone classifications are relatively rough and subjective methods for pre-operative assessment. This study compared the buccal and the lingual cortical bone mineral densities (BMD), and correlation trabecular BNID and cortical BMD by quantitative computed tomography (QCT). The subjects were 56 patients with mandibular distal extension defect (20 males, 17 pre-menopausal and 19 post-menopausal women;age range 30 to 79 years). The buccal and lingual cortical BMD and the trabecular BMD were measured by QCT. The difference and the correlation among the three groups were estimated. The results were as follows. 1. The buccal cortical BMD was significantly higher than the lingual cortical BMD in the male and pre-menopausal group. However, no significant difference was seen between the buccal and the lingual cortical BMD in the post-menopausal group. 2. The buccal cortical BMD correlated well with the trabecular BMD in the male group. 3. The buccal and the lingual cortical BMD did not correlate with the trabecular BMD in the pre-menopausal group. 4. The buccal cortical BMD correlated significantly with the trabecular BMD in the post-menopausal group. In conclusion, it is important to consider these tendencies of mandibular BMD in dental implant treatment.