Advances in medical treatment and demographic change due to aging have made dentistry and oral surgery medical care significant change. In point of the future dental care in Japan, hospital dentistry and oral surgery improves the quality of treatment and the patient's safety and secure. In addition, it is believed to contribute to make the role of hospital dentistry and oral-maxillofacial surgery in the integrated community healthcare system and the positioning of dentistry in future medical policy.

Oral surgery

10.5794/jjoms.63.534

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Evaluation of Cariogenic Potential of Sugar and Sugar Substitutes by in vitro Enamel Demineralization.

JOURNAL OF DENTAL HEALTH (1994)

Nobuhiro Taguchi

[in Japanese]

10.5834/jdh.44.85

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Changes in retention of fissure sealant for early carious first permanent molars.

JOURNAL OF DENTAL HEALTH (1990)

Koji Kawasaki Tadashi Yoshikawa Setsuko KUBOTA Nobuhiro Taguchi Youichi IIJIMA

The clinical retention of a multiple application of a pit and fissure sealant was evaluated at every 3 months after sealant treatments on the early carious first permanent molars in grade one or two elementary school children during school based fluoride mouthrinsing (daily; 0.05% NaF). Maxillary and mandibular teeth, CO and C1 teeth at sealant treatment, occlusal mesial and occlusal distal sites for maxillary teeth, and occlusal and buccal sites for mandibular teeth were differentiated and evaluated. Maxillary palatal sites were not evaluated because no early caries was detected in these sites.The ratio of teeth retaining sealant was 78.7% at the final examination. Sealant materials had not come away in 53.4% of sealed teeth during this survey period. The rate of teeth retaining sealant was significantly reduced after 15 months compared to at 3 months. The retention ratio of CO teeth and the site retention ratio of maxillary occlusal distal site were not significantly reduce dat any period compared to at 3 months.

10.5834/jdh.40.660

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[Clinical studies on TMJ arthrosis in young people. A study of dental axis of lower molar teeth].

PubMed (1989)

Noriaki Saburi Nobuhiro Taguchi Yasuyoshi FUKUOKA T Asai Hisanari KOTANI

The subjects were 37 female patients with juvenile TMJ arthrosis (T group) and 27 healthy females (N group) who visited the Dept. of Oral Surgery, Nagoya University Hospital or the Dept. of Dent-Oral Surgery, Nagoya University Branch Hospital. Following evaluations were made: 1) L6 to L7 angle 2) L6 to occlusal plane 3) L7 to occlusal plane 4) L6 to mandibular plane 5) L7 to mandibular plane 6) occlusal plane angle 7) mandibular plane angle Following results were obtained: 1. Significant differences between T group and N group were not seen in the occlusal plane angle. 2. A majority in the T group showed a mesial inclination of the lower second molar. 3. Mandibular plane angle in the T group was larger than that in the N group.

Mandible (arthropod mouthpart)

Mandibular molar

Source

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Effect on Demineralization Potential of Sucrose and Sorbitol Solutions-Evaluation Based on an Intra-oral Enamel Demineralization Device.

JOURNAL OF DENTAL HEALTH (1994)

Youichi IIJIMA Nobuhiro Taguchi Okiuji Takagi

食品の相対的な齲蝕誘発性を評価するために, ポジティブコントロールやネガティブコントロールとしてのショ糖やソルビトール溶液の使用が推奨されている。本研究の目的は, 口腔内エナメル質脱灰装置 (EDD) を用いて, これら糖質の脱灰程度におよぼす影響について決定することである。エナメル質薄切切片 (700～800μm) を有するEDDは, 第一大臼歯の頬面に装着された。被験者 (n=6) はエナメル質表面にプラークの蓄積を促進するためにブラッシングを行うことなくEDDを5日間装着し, 次に被験糖質 (10%ショ糖および10%ソルビトール溶液) を用いて3分間, 1日4回, 10日間の洗口を行った。装置は取り除かれた後, エナメル質薄切切片 (100μm) は, マイクロラジオグラムによって脱灰程度が評価された。10%ショ糖溶液の洗口後, 6例中の3例に脱灰像が認められ, 残り3例は健全エナメル質であった。10%ソルビトール溶液の洗口によって2例に脱灰像が, 残り4例は健全エナメル質であった。同一被験者内比較では, ショ糖溶液の脱灰程度におよぼす影響は, ソルビートル溶液に比較してより進行性の所見を示した。in situにおける脱灰像の特徴は, 同一切片内に健全部ならびに脱灰部領域が頻繁に観察されたことである。二種類の病変部, 表層下脱灰と表層軟化脱灰部が観察された。病変にかかわりなく, 脱灰程度を評価するためには, 画像処理に基づいた脱灰面積の評価が有用であることが示唆された。

10.5834/jdh.44.286

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Prevention of experimental antibiotic-associated diarrhea by Clostridium butyricum.

Nippon Saikingaku Zasshi (1988)

Nobuhiro Taguchi Fumihiko Abe Yuzuru Mikami Tadashi Arai

A golden-hamster model of antimicrobial agent-associated lethal enterocolitis was produced by oral administration of cef atrizine (CFT). In all diarrheal and dead animals, the striking finding at necropsy was enterocolitis in which the cecum and distal ileum were greatly distended with fluid: toxigenic Clostridium difficile was detected at 108 CFU/head or greater. Bacteria-free cecal filtrate and culture filtrate of C. difficile isolated from the cecal contents of diarrheal animals exhibited lethal toxicity to normal hamsters. A single oral administration of CFT (75mg/kg) produced lethal enterocolitis in 17 of 20 animals during a one-month period of observation.Clostridium butyricum Miyairi (CbM), spores, used as an enteroregulator, were investigated for their potential to prevent the lethal enterocolitis in this model. Animals were administrated CbM orally (109 CFU/day) for three consecutive days after CFT challenge, and this prevented death in 16 of 20 animals during one mouth of observation. These results suggest that CbM has a preventive effect against lethal enterocolitis in this model.

Cecum

Clostridium butyricum

Enterocolitis

Antibiotic-Associated Diarrhea

Lethal dose

Necrotizing Enterocolitis

Mesocricetus

10.3412/jsb.43.829

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Chenges in the Acid Resistance in Laser Irradiated-Remineralized Enamel.

JOURNAL OF DENTAL HEALTH (1992)

Tadashi Yoshikawa Youichi IIJIMA Daisuke Inaba Koji Kawasaki Nobuhiro Taguchi

The aim of this study was to examine the change in acid resistance of lased-remineralized enamel. Sixty-six enamel slabs were prepared from thirty-three human premolars. These enamel slabs were demineralized artificially. They were irradiated with a Q-switch Nd-YAG laser and remineralized with two remineralizing solutions, one with and the other without fluoride. To evaluate acid resistance, the enamel slabs were subsequently immersed in 0.1M lactic acid solution (pH 4.5) while stirring (139r.p.m. ±12; Mean±S.D.), and dissolved Ca2+ was measured as a function of time from 15min to 180min.The results were as follows:1) Laser irradiation increased acid resistance of demineralized enamel during short periods (up to 60min).2) Remineralization without fluoride increased acid resistance of demintralized enamel during short periods (up to 60min) regardless of laser irradiation.3) Remineralization with fluoride increased acid resistance of demineralized enamel during long periods (up to 180min) regardless of laser irradiation.

10.5834/jdh.42.675

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Enamel fluoride uptake from mouthrinse solutions with different NaF concentrations

Community Dentistry And Oral Epidemiology (2002)

Daisuke Inaba Koji Kawasaki Youichi IIJIMA Nobuhiro Taguchi Hideaki Hayashida

Abstract – Objectives: The influence on enamel fluoride uptake of reducing the NaF concentration of a mouthrinse solution by half, from 0.05–0.025%, was examined in elementary school children. Methods: The participatory elementary school had employed school‐based fluoride mouthrinse with 0.05% NaF solution since 1983, and in 1993, the NaF content was lowered to 0.025%. Dental examination and enamel biopsy of maxillary central incisors were performed just before the NaF content reduction for children who had received the daily 0.05% NaF mouthrinse for 2–5 years since 6 years of age. During 1993–95, dental examination and enamel biopsy were undertaken for newly enrolled 6‐year‐old children, and the same subjects were re‐examined after 2 years. The same series of examinations were conducted for the control group, which consisted of children belonging to another elementary school without a fluoride program. Results: The enamel fluoride concentration of 8‐year‐old children who used the 0.025% NaF mouthrinse for 2 years was 1810 ± 535 ppm, reaching the same order as that in children who continued using the 0.05% NaF mouthrinse (1863 ± 1358 ppm), and was significantly higher than that of children without fluoride programs (1113 ± 303 ppm). There was no considerable increase of mean DMFT values due to the NaF content reduction. Conclusions: It was concluded that a daily 0.025% NaF mouthrinse provides the similar fluoride content for enamel as 0.05% NaF mouthrinse as long as the rinsing frequency is maintained.

10.1034/j.1600-0528.2002.00042.x

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A Study on Relation to Change in Amount of Interdental Space, Dental Plaque, and Dental Caries in 1-3-Year-Old Children.

JOURNAL OF DENTAL HEALTH (1994)

Nobuhiro Taguchi Koji Kawasaki Youichi IIJIMA Okiuji Takagi

The purpose of this investigation was to study the relation between changes in amount of interdental space accompanying growth and development of deciduous dentition, plaque deposits and interproximal caries in deciduous maxillary anterior teeth, and to determine whether the presence or absence of interdental space is useful for dental health guidance. Oral examinations were carried out on the same 2074 children at the age of 1 year and 6 months and 3 years and 6 months in Nagasaki City in Japan. Interdental spaces were examined by inserting an explorer. About two thirds of the subjects showed no individual changes in the interdental spaces between the right and left central incisors in the upper jaw. In most of the remaining subjects, spacing occurred gradually.Between the right and left maxillary deciduous central incisors, the proximal caries incidence in individuals with no space at the age of 1 year and 6 months was greater than that of those with space at the age of 1 year and 6 months. When there was no space at the age of 1 year and 6 months, the proximal caries incidence was related to plaque score. Between maxillary deciduous central incisors and lateral incisors, the proximal caries incidence was lower than between the maxillary deciduous central incisors and the proximal caries incidence was not affected by changes in amount of interdental space and plaque score. Between maxillary deciduous lateral incisors and canines, the proximal caries incidence was the lowest of the observed sites. It is important to take into consideration with deciduous dentition for caries prevention the space between the right and left maxillary deciduous central incisors.

Interdental consonant

Deciduous dentition

Deciduous tooth

10.5834/jdh.44.194

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