著者
小野 元子 太田 文隆 玉置 幸雄 石川 博之
出版者
福岡歯科大学学会
雑誌
福岡歯科大学学会雑誌 (ISSN:03850064)
巻号頁・発行日
vol.30, no.3, pp.97-104, 2004-01-30
参考文献数
34
被引用文献数
3

The relation between acoustic characteristics of the vowel and maxillofacial morphology was studied in 100 Japanese female malocclusion patients with the mean age of 24 years. The frequencies of the first formant (FD and second formant (F2) of the five Japanese vowel sounds (/a/,/i/,/u/,/e/and/o/) were analyzed by using linear predictive coding, and 18 skeletal parameters were measured on lateral cephalograms. From correlation analyses between F1, F2-F1 and 18 parameters, F1 of the /i/ statistically showed significant positive correlation with the mandibular plane angle and the Y-Axis, whereas the F2-F1 of the /i/ showed negative correlation with the angle of convexity, the mandibular plane angle, the Y-Axis, N-M distance, and the ANS-M distance. No significant correlation was found in the other vowel sounds. These results suggested that the uttering /i/ sound can be easily influenced by the mandibuluar vertical and horizontal positions because its articulation point is placed at the most anterior and superior site among the five Japanese vowels.
著者
大坪 由佳 田代 教二 添島 正和 大森 桂二 山田 俊介 森永 健三 木村 瞳 岡松 加恵 山本 勝己 長島 義之 山崎 裕 城戸 寛史 松浦 正朗
出版者
福岡歯科大学学会
雑誌
福岡歯科大学学会雑誌 (ISSN:03850064)
巻号頁・発行日
vol.33, no.1, pp.11-19, 2007-03-31
被引用文献数
1

The aim of this study was to investigate a treatment policy for the practices of Kyushu area dentists related to dental implant restorations for single missing teeth of the lower first molars and edentulous mandibles. Questionnaires were sent to 43 dentists practicing in the Kyusyu area. Valid answers were obtained from 23 dentists. During 2003, 20 clinics had performed various numbers of implant treatments, and a total of 539 cases had been treated with implant prostheses. During 2004, 21 clinics had performed implant treatments, and a total of 679 cases had been treated with implant prostheses. Thirteen clinics had performed single-tooth implant restorations of missing lower first molars during 2003 and 2004. The totals of the cases were 47 such cases during 2003, and 56 such cases during 2004. Conversely, 406 cases of missing lower first molars had been treated with conventional bridges during 2003, and 423 such cases during 2004. Only 5 clinics in 2003 and 6 clinics in 2004 had cases with edentulous mandibles treated with implant-supported prostheses. The totals of the cases were 19 cases during 2003 and 18 cases during 2004. Conversely, more than 300 cases during 2003 and 450 cases during 2004 had been treated with conventional full denture. Fourteen of 23 dentists strongly recommended implant therapy to patients with single missing teeth of the lower first molars and 10 dentists recommend implant therapy to the patients with edentulous mandibles.
著者
池邉 哲郎 大関 悟
出版者
福岡歯科大学学会
雑誌
福岡歯科大学学会雑誌 (ISSN:03850064)
巻号頁・発行日
vol.35, no.1, pp.1-10, 2009-03-31

An increasing number of cases for bisphosphonate-related osteonecrosis of the jaw (BRONJ) have been reported since the first publication regarding it in 2003. Bisphosphonate, a drug to inhibit osteoclast activity, is administered intravenously or orally to the patients suffering from multiple myeloma, cancer bone metastasis and osteoporosis in order to treat the pathological bone resorption. In BRONJ, however, this drug is thought to impair bone turnover and angiogenesis of the jaw, leading to bone necrosis as an adverse side effect. Bone necrosis is occasionally triggered by dental surgery such as tooth extraction, promoted by bacterial infection, and exposed out of gingiva. The incidence of BRONJ in the patients taking oral bisphosphonate is very rare, but there have been considerable numbers of BRONJ occurring. Because the population of osteoporosis patients taking oral bisphosphonate increases year after year, dentists and oral surgeons must be careful at treating such patients for BRONJ. In this review, the recent findings, concepts and management for BRONJ are presented. The occurrence of BRONJ seems to clarify the critical role, osteoclasts play in the bioregulation mechanism of the jaw.
著者
常岡 由美子 藤野 佳代子 月成 愛華 山本 勝己 大坪 由佳 岡松 加恵 森永 健三 長島 義之 松永 興昌 城戸 寛史 高橋 裕 佐藤 博信 松浦 正朗
出版者
福岡歯科大学学会
雑誌
福岡歯科大学学会雑誌 (ISSN:03850064)
巻号頁・発行日
vol.32, no.2, pp.51-59, 2006-06-30

Treatment with mandibular bone-anchored implant bridges can solve long-term problems of prosthetic rehabilitations in totally or partially edentulous patients. However, a bone-anchored bridge creates a narrow and deep space between the base of the super-structure and alveolar ridge, and therefore, a patient's personal hygiene with a bone-anchored bridge is more difficult to perform than with an implant-supported overdenture. The aim of this study is to evaluate the oral hygiene status of patients with mandibular bone-anchored bridges, and to analyze their problems. From September 2000 to April 2004 in our hospital, 10 cases (5 males and 5 females; average age 48.9 years) with totally and partially edentulous mandibles were treated using implant-supported bone-anchored bridges with immediate or conventional loading. Oral hygiene instructions were given immediately after delivery of the superstructure, and follow-up examinations were provided for a period ranging from 9 months to 4 years and 5 months. The oral hygiene status of each patient was classified into one of 4 levels ("excellent", "good", "marginal" and "poor") at the follow-up observations. As a result, 1 patient (44 year-old female) was evaluated as "excellent", 2 (average age; 58.5 years) were "good", 5 (average age; 44.4 years) were "marginal" and 2 (average age; 53.0 years) were "poor". The ages of the patients with bone-anchored bridges were relatively young (26-70 years), and therefore, no observable tendency was recognized among different generations in the ability to perform oral hygiene. As a result, the patient's skill involved in cleaning and understanding the importance of oral hygiene was considered important for maintaining a healthy oral condition. We conclude that continuous professional oral hygiene care by dental hygienists is needed for patients with bone-anchored implant bridges.
著者
香川 豊宏 西明 仁 瀬々 良介 三輪 邦弘 田代 陽美子 小川 和久 和田 忠子 湯浅 賢治 坂元 英知 市原 隆洋 原田 理恵 太田 隆介
出版者
福岡歯科大学学会
雑誌
福岡歯科大学学会雑誌 (ISSN:03850064)
巻号頁・発行日
vol.28, no.4, 2001-12-30

近年ネットワーク上でのWebテキストが色々検討されてきており,当大学においても教育用データベースのサーバーが設置されて数年が経過している。しかしその内容はHTMLによるテキストやJPEG画像のみの教科書的なサイト運営に留まっており,インターネットの持つ双方向メディアとしての能力が十分に発揮されていないのが現状である。しかし,現在利用可能な最新のインターネット技術を用いれば,従来の印刷物をこえる双方向メディアとしてのWebテキストになることは十分に期待できる。そこで今回はフリーソフトであるGifBuilder1.0を用いてgifアニメーションのWebテキストへの利用を検討した。今回は二等分法についてのGifアニメーションを用いたコンテンツ作成を試みた。その結果Gifアニメーションを作成する場合にはフレームレートを1/100S〜100/100Sまで自由に選べるが,1/30S〜1/50Sに設定するのがアニメーションのスピードとして適切と思われた。また,画像の転送スピードを考慮して一つのアニメーションのファイル容量は100kbyte前後が望ましいと思われる。100kbyteであれば,あくまでも計算上ではあるがISDN128kbpsのネットワークで5秒以内の転送時間でアニメーションを読み込むことが可能である。またHTMLの一つであるイメージマップを用いることによりX線画像の解剖についての学習も行いやすいと思われた。今後はR-ASHやMPEGによる動画などをコンテンツに加え,学生が自己学習しやすいようなWebテキストを開発していきたい。
著者
晴佐久 悟 筒井 昭仁 境 脩 西山 葉子 松鶴 さゆり 山根 奈々
出版者
福岡歯科大学学会
雑誌
福岡歯科大学学会雑誌 (ISSN:03850064)
巻号頁・発行日
vol.28, no.4, pp.141-149, 2001-12-30
被引用文献数
4

We investigated toothbrushing habits and toothpaste use, especially of fluoride toothpaste, of Japanese young children in Fukuoka. Parents of 767 young children aged between 1.5 and 4 years completed the questionnaire we distributed. The total response rate was 90.0%. The present findings were compared with those of a similar investigation in 1992. The findings were as follows: 1. Most young children brushed their teeth at least once a day assisted by their parents. 2. Few young children aged 1.5 years used toothpaste. About 65%-70% of young children aged 3 and 4 years used toothpaste. There was little change in these findings in 1992 and 2000. 3. Few children aged 1.5 years used fluoride toothpaste. About 50% of young children aged 3 and 4 years used fluoride toothpaste. The annual market share of fluoride toothpaste in Japan had increased from 39% in 1992 to 77% in 1999. It is still less however, than those of other highly developed countries. The percentage of young children who use fluoride toothpaste may be passive due to the little information available on the effects of fluoride toothpaste. Dentists, dental hygienists and other dental personnel should provide information fluoride toothpaste and strongly recommend its use among parents in Japan.
著者
花田 信弘
出版者
福岡歯科大学学会
雑誌
福岡歯科大学学会雑誌 (ISSN:03850064)
巻号頁・発行日
vol.28, no.4, pp.117-121, 2001-12-30

The oral cavity plays an important role in performing all functions awkward use involving communication and mastication. Therefore, the deterioration of oral functions caused by dental caries and periodontal diseases may have harmful influences on general health. Previous reports have revealed that dental caries is an infectious disease caused by domestic infection with Streptococcus mutans. Clinical trials conducted in northern Europe have shown that prevention of S. mutans infection from mother to child is possible. One British research group, which has been involved in the development of a vaccine for dental caries, succeeded in synthesizing an IgG and secretary IgA antibodies against S. mutans protein antigen I / II from tobacco. They then reported that it is possible to eliminate S. mutans from the oral cavity using these antibodies. Recently, we found a method of eliminating S. mutans without any antibodies. A dental drug delivery system (3DS) with dental trays and chlorhexidin gel was proposed to eliminate S. mutans, and similar methods are spreading rapidly in Japanese dental clinics. 3DS will become a powerful tool to prevent the transmission of oral pathogens. 3DS will contribute to not only dental caries but also to general health through pathogenic bacterial control.
著者
坂元 英知 市原 隆洋 原田 理恵 太田 隆介 小川 和久 瀬々 良介 香川 豊宏 田代 陽美子 三輪 邦弘 和田 忠子 湯浅 賢治
出版者
福岡歯科大学学会
雑誌
福岡歯科大学学会雑誌 (ISSN:03850064)
巻号頁・発行日
vol.28, no.4, 2001-12-30

【目的】CT検査において,照射するX線量は検査部位を基準に決定され,被写体の大きさは考慮されていないのが一般的である。しかし,被写体の大きさに画質は影響をうけると考えられる。そこで,検査部位のみならず,被写体の体厚を考慮した線量の適正化とその有用性について検討を行った。【対象・方法】CT(GE横河社製:Lemage Supreme)を使用し,胸・腹部用ファントム(京都科学標本社製)の厚みと線量を変化させてCT撮影を行いそれを指標とした。患者(2001年6〜9月:160人)は,腹部領域の画像を使用,それぞれの体厚とCT値の標準偏差を計測,そのデータより患者の至適線量,体厚における線量比を推測した。またその線量の変化におけるX線管球冷却時間の計測を行った。【結果】1, 両者の体厚における標準偏差値の差は0.5で平行な右上がりの直線を示した。2, 体厚が28cm以下の患者撮影線量は20〜35%減少した。3, 線量の減少に伴い,X線管球冷却時間は短縮した。【まとめ】以上の結果1, 画質の均一化2, 患者の照射線量の減少3, 管球冷却時間の減少(患者待ち時間の短縮)4, 管球の長寿命化5,病院収益の向上が考えられる。