アブストラクト(24巻2号:神奈川歯学)

神奈川歯学

Japanese

Title : フッ素-ランタン二段処理法による乳歯象牙質の難溶化に関する研究
Subtitle : 原著
Authors : 久保田守1),2), 檜垣旺夫1), 斎藤滋2)
Authors(kana) :
Organization : 1)神奈川歯科大学小児歯科学教室, 2)神奈川歯科大学口腔生化学教室
Journal : 神奈川歯学
Volume : 24
Number : 2
Page : 333-344
Year/Month : 1989 / 9
Article : 原著
Publisher : 神奈川歯科大学学会
Abstract : 「緒言」乳歯う蝕は, 小児の口腔と全身の健全な発達や発育に悪影響を及ぼす撲滅すべき疾患である. その予防法の一つとして現在, フッ化物の局所的応用がよく用いられ効果を挙げている. しかし, やや減少傾向にあるとはいえ, 小児のう蝕はいまだ蔓延しており, 3歳児におけるう蝕有病者率は72%に達している. しかも処置完了者率は僅か2%に過ぎないのが現状である. その理由として, 乳歯は形態的に食物が停滞しやすくて歯質も薄く, アパタイト結晶も小さいので溶解性が高い. さらに小児は口腔清掃が不充分で停滞性のある食物摂取が多く, 自浄作用も不充分という環境におかれている. したがって, 乳歯は一たびう蝕に罹患すると, 急速にしかも広範囲に進行してしまうのである. しかも, 自発的な受診ができず, 治療も困難であり, 二次う蝕も起こりやすい. このため, う蝕予防という観点からだけでなく, う蝕抑制という観点からも種々のフッ化物やその他の薬剤が考案され, 応用されてきた.
Practice : 歯科学
Keywords : 乳歯象牙質, う蝕抑制, フッ素, ランタン, フッ化ランタン

English

Title : Insolubilization of Deciduous Tooth Enamel by the Two-Step Method with Fluoride and Lanthanum Treatment
Subtitle : Original article
Authors : Mamoru KUBOTA1),2), Morio Higaki1), Shigeru Saito2)
Authors(kana) :
Organization : 1)Department of Pedodontics, Kanagawa Dental College, 2)Department of Oral Biochemistry, Kanagawa Dental College
Journal : Kanagawa Shigaku
Volume : 24
Number : 2
Page : 333-344
Year/Month : 1989 / 9
Article : Original article
Publisher : Kanagawa Odontological Society
Abstract : Abstract : The acid-resistance of the tooth surface is strengthened to form noncrystal lanthanum fluoride on its surface by the two-step treatment (F-La treatment) with acidulated-phosphate fluoride and lanthanum chloride solutions as previously reported by Fujiwara, Negishi, Miyagi et al. This study has been made to examine some clinical applications of the treatment. The acidresistance effect and the actual condition of the F-La treatment were investigated on the extracted human deciduos dentin. Analysis was made using the electron probe X-ray microanalyzer before and after the acid solubility test. The results were as follows : 1) With F-La treatment, the acid-solubility of deciduous tooth dentin was reduced to about one-third of that without treatment, and to about two-third compared both with F-treatment and with diamine silver fluoride application. 2) Applications of 3 to 5 minutes with F and 3 minutes with 0.5 to 1.0% La sufficed for this F-La treatment. 3) An etching procedure was not necessary previous to the treatment in contrast with the application to the enamel. 4) Fluorine and lanthanum penetrated up to approximately 10μm from the dentin surface with this treatment. Even after the acid-solubility test, a sufficient quantity of the stated chemicals remained, thus protecting the tooth substance. 5) The acid-solubility of the deciduous dentin was higher than that of the deciduous enamel. After the F-La treatment, however, the former diminished more markedly than the latter. Based on these expermental results, one can confirm the fact the chemical reactivity of the deciduous dentin is higher than that of the deciduous enamel.
Practice : Dentistry
Keywords :