著者
永井 恒司
雑誌
化学と工業 = Chemistry and chemical industry (ISSN:00227684)
巻号頁・発行日
vol.45, no.7, pp.1285-1286, 1992-07-01
著者
松崎實 [著]
出版者
私製
巻号頁・発行日
1933

1 0 0 0 OA 官報

著者
大蔵省印刷局 [編]
出版者
日本マイクロ写真
巻号頁・発行日
vol.1945年06月04日, 1945-06-04
著者
Tamotsu Tsurumachi Yoriyuki Hirano Akiko Hira Yasuyo Aida Bunnai Ogiso
出版者
日本大学歯学部
雑誌
Journal of Oral Science (ISSN:13434934)
巻号頁・発行日
vol.57, no.2, pp.157-160, 2015 (Released:2015-06-10)
参考文献数
10
被引用文献数
7

When a primary tooth sustains a traumatic injury, development of the permanent tooth can be disturbed, leading to various malformations. This case report details the 7-year follow-up of a developmental anomaly of a central mandibular incisor in a 10-year-old Japanese girl with a history of dental trauma that had occurred at age 4. The trauma had resulted in unusual crown dilaceration in the permanent successor, which exhibited a discoloured and abnormal crown morphology. Radiographic examination revealed crown dilaceration of the tooth, which had a curved root canal. (J Oral Sci 57, 157-160, 2015)
著者
Katsuyoshi Tsunori
出版者
日本大学歯学部
雑誌
Journal of Oral Science (ISSN:13434934)
巻号頁・発行日
vol.57, no.2, pp.131-136, 2015 (Released:2015-06-10)
参考文献数
16
被引用文献数
1 12

This study investigated the effects of administration of parathyroid hormone (PTH) at different dosages and schedules on bone regeneration in critical-size bone defects in rat calvariae. After calvarial defects had been prepared in 50 rats, they were divided into five treatment groups: 15 µg/kg PTH daily (PTH-15), 35 µg/kg PTH three times per week (PTH-35), 105 µg/kg once per week (PTH-105-1), 105 µg/kg three times per week (PTH-105-3), and controls given vehicle alone. Bone regeneration was evaluated radiographically using micro-computed tomography (micro-CT) or histologically. The amount of newly generated bone in the calvarial defects was found to be significantly greater in the PTH groups than in the control group, and did not differ significantly among the PTH-15, PTH-35, and PTH-105-1 groups, whereas the PTH-105-3 group showed a significantly greater degree of new bone formation than the other PTH groups. It appeared that a higher dose of PTH stimulated a greater degree of bone regeneration in this experimental setting. The present results also suggest that the total dose of PTH administered is significantly related to the amount of bone regenerated within a defined period, indicating that less frequent administration of PTH might be a feasible protocol for bone regeneration therapy. (J Oral Sci 57, 131-136, 2015)
著者
Hiroyasu Kurokawa Toshiki Takamizawa Akitomo Rikuta Keishi Tsubota Masashi Miyazaki
出版者
日本大学歯学部
雑誌
Journal of Oral Science (ISSN:13434934)
巻号頁・発行日
vol.57, no.2, pp.101-108, 2015 (Released:2015-06-10)
参考文献数
35
被引用文献数
3 15

In this clinical study, we evaluated the 3-year clinical performance of a resin composite containing a surface-prereacted glass ionomer (S-PRG) filler (Beautifil II; Shofu Inc., Kyoto, Japan) placed with a single-step self-etch adhesive (BeautiBond; Shofu Inc.) in posterior restorations. Using modified US Public Health Service criteria, two experienced investigators performed clinical evaluations at the baseline, 6 months, 18 months, and 3 years. Color match, marginal adaptation, anatomical form, surface roughness, marginal discoloration, postoperative sensitivity, and secondary caries were evaluated. After 3 years, 26 patients attended the recall and 31 restorations were evaluated. No postoperative sensitivity or secondary caries was observed at any time point, and no restorations failed during the follow-up period. However, surface roughness, marginal adaptation, and marginal discoloration showed deterioration after 3 years. In conclusion, although some clinical changes were observed, resin composite containing S-PRG filler placed with self-etch adhesive exhibited acceptable clinical behavior in posterior restorations. (J Oral Sci 57, 101-108, 2015)
著者
吉田 明夫 瀬野 徹三
出版者
特定非営利活動法人日本火山学会
雑誌
火山 (ISSN:04534360)
巻号頁・発行日
vol.37, no.6, pp.297-301, 1992-12-25
被引用文献数
4
著者
濱本 悟志
出版者
日本物理教育学会
雑誌
物理教育 (ISSN:03856992)
巻号頁・発行日
vol.49, no.2, pp.175-179, 2001

現在,本校では中学3年生を対象に,「テーマ学習」という名称で,「既存の教科では必ずしも包摂できない分野や内容をも含めた諸領域での学習活動」および「自らが選択したテーマを少人数で主体的に探求する学習活動」を実施している。約120名の生徒に対して約10のテーマが提示され,生徒は興味と関心を抱いたテーマを選択し,半年間にわたって教師の指導のもと,探求的に取り組んでいく。「楽器の魅力とその解明」は,98・99年度に実施された物理と音楽の合科型のテーマ学習である。
著者
森 裕介 田中 基八郎 渡邉 鉄也 戸田 富士夫
出版者
一般社団法人日本機械学会
雑誌
Dynamics and Design Conference : 機械力学・計測制御講演論文集 : D & D (ISSN:13480235)
巻号頁・発行日
vol.2000, 2000-09-01

Triangle is a popular instrument of high frequency sound. But its generation mechanism of sound is not clear. In this paper, we investigated frequency characteristics and mode shape of vibration of the triangle, and measured distribution of sound pressure level around the triangle. As a result, we were able to make certain that those were closely related. Considering that hanging position is an important parameter of damping property, we experimented using a C type curved beam. We compared its damping result with that of the triangle.