著者

森 厚二 日高 勇一 中島 三晴 鬼澤 徹 矢ヶ﨑 裕 鈴木 和夫 五十嵐 俊男 伊藤 充雄

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.12, no.2, pp.185-192, 1999-06-30 (Released:2016-08-20)

参考文献数

15

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Three kinds of bone filling materials were prepared by combining powder, including CaO, CaSiO3 and hydroxyapatite (HAP), and chitin and chitosan. The proportion of CaO, CaSiO3 and HAP was 4.5%, 6.0% and 89.5%. This powder 0.54 g (A), 0.67 g (B) and 0.80 g (C) were kneaded with chitin and chitosan sol 2.2 g and hardened, respectively. These materials were evaluated in the experiment animal and osteoblastic cells. The purpose of this study was to discuss which materials were most desirable for the bone filling materials. In an animal experiment, tissue reactions were similar in each material and were characterized by granulation tissue formation with inflammation. In the osseous tissue, repairs at defected sites(B and C) and direct relationship between material A and bone were seen. Cultured cell examination revealed that DNA contents and alkaline phosphatase activity in material A were significantly higher than those in control. Results of this study indicated that material A, 0.54 g mixed in chitin and chitosan sol 2.2 g, was most effective for the bone formation.

著者

三浦 滋 村田 功 船橋 賢市 青野 茂樹 伊藤 充雄

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.15, no.3, pp.330-334, 2002-09-30 (Released:2015-08-20)

参考文献数

6

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Physical properties (including shrinkage, melting point, and thermal expansion) and mechanical properties (such as strength) of inlay wax can influence casting accuracy. Using three different types of paraffin waxes with different melting points, inlay waxes were prepared at a trial base. The melting points, shrinkage, and thermal expansion of these prepared inlay waxes were measured. The bending strength, as well as strain, was also measured from these inlay waxes when the ambient temperature was controlled to 16,23, and 30℃. Main results are as follows: 1. If a paraffin wax having a higher melting point was used, the resultant inlay wax showed a higher melting point and smaller shrinkage. 2. On the other hand, when a paraffin wax with a lower melting point was used, the resultant inlay wax had a larger thermal expansion. 3. The bending strength of prepared inlay waxes was lower when tested at a higher ambient temperature. 4. Strain of inlay waxes were recorded to be larger when the testing ambient temperature was higher.