アブストラクト(26巻4号:神奈川歯学)

神奈川歯学

Japanese

Title : 覆髄剤の歯髄に及ぼす影響に関する細胞生物学的研究
Subtitle : 原著
Authors : 三上昌子1),2), 長田保1), 梅本俊夫2)
Authors(kana) :
Organization : 1)神奈川歯科大学歯科保存学教室第三講座, 2)神奈川歯科大学口腔細菌学教室
Journal : 神奈川歯学
Volume : 26
Number : 4
Page : 353-371
Year/Month : 1992 / 3
Article : 原著
Publisher : 神奈川歯科大学学会
Abstract : 「緒言」覆髄剤には, 窩洞形成により窩底象牙質が菲薄になった場合, あるいは窩洞形成や支台歯形成中に偶発的露髄を生じた場合に理化学的刺激から歯髄を保護する作用に加えて, 齲蝕や切削に伴って生じる歯髄の疼痛や炎症に対する鎮痛, 消炎作用ならびに第二象牙質形成を積極的に促進する薬理作用などが要求される. 近年, 歯科材料の生物学的な安全性に関する論議が高まり, 生物学的試験法の確立や規格化を目的とした試案がいくつか国際的にも公表されてきており, 覆髄剤についても, その生物学的評価が求められる状況になりつつある. 歯科材料の生物学的評価は従来から, in vivoでは実験動物を用いて, その組織傷害性を病理組織学的に検索したり, in vitroでは培養細胞を用いた細胞毒性についての検討などが行われてきた. しかしながら, in vivo試験では, 比較的長期間経過後の組織全体に現れる変化を観察できる利点がある反面, 動物の個体差や実験手技の再現性が困難なことからデータの均一性に問題があり, さらに, 組織変化に関わる生体因子が極めて複雑であるため客観的評価を得ることが困難な点があげられる.
Practice : 歯科学
Keywords : 覆髄剤, 歯髄線維芽細胞, IL-1β, PGE2, ALP活性

English

Title : Cell-Biological Study on the Significance of Pulp Capping Materials to Human Pulp Fibroblast
Subtitle :
Authors : Masako MIKAMI1),2), Tamotsu Osada1), Toshio Umemoto2)
Authors(kana) :
Organization : 1)Department of Conservative Dentistry, Kanagawa Dental College, 2)Department of Oral Microbiology, Kanagawa Dental College
Journal : Kanagawa Shigaku
Volume : 26
Number : 4
Page : 353-371
Year/Month : 1992 / 3
Article : Original article
Publisher : Kanagawa Odontological Society
Abstract : Abstract: The cell-biological significance of pulp capping materials include Calcium hydroxide (Dycal, Life, NU-CAP), Eugenol (EUGEDAIN, Cavitec) and Glass Ionomer (Fuji-Ionomer Type II, Base cement), and principal ingredients of pulp capping materials such as Calcium hydroxide and Eugenol were investigated by measuring of cytotoxicity, inhibition of DNA synthesis and alkaline phosphatase (ALP) activity, and the production of interleukin-1β (IL-1β) and prostaglandin E2 (PGE2) of human pulp fibroblast (HPF) stimulated with dissolution of each materials. The results obtained were as follows. 1. Cytotoxicity of dissolution of each pulp capping materials to HPF was decreased dose dependently in the concentration of 100 and 10-2 dilution. And cytotoxicity of Calcium hydroxide and Eugenol also decreasd dose dependently in the concentration between 10-2 M and 10-5 M. 2. The dissolution of all pulp capping materials tested except EUGEDAIN strongly inhibited DNA synthesis of HPF, however these effects were decreased dose dependently. Calcium hydroxide and Eugenol also strongly inhibited DNA synthesis of HPF. 3. The production of IL-1β from HPF stimulated with Glass Ionomer pulp capping materials (Fuji-Ion omer Type II and Base cement) were significantly high (p<0.05). 4. The PGE2 production was induced when HPF was stimulated by all test samples especially Dycal (345 pg), however, Glass Ionomer pulp capping materials did not. 5. The increase of ALP activity was found in HPF stimulated with 100 to 10-2 dilution of dissolution of all pulp capping materials except Glass Ionomer and 10-2 M to 10-7 M concentration of all principal ingredients. Dycal, Life and Cavitec especially enhanced ALP activity. These results suggest that cell-biological significance of pulp capping materials against dental pulp be able to evaluate quantitatively by measuring of the inducing activity of IL-1β and PGE2 production from HPF in vitro.
Practice : Dentistry
Keywords :