アブストラクト(24巻1号:神奈川歯学)

神奈川歯学

Japanese

Title : ウシ永久歯歯胚の微量金属に関する研究
Subtitle : 原著
Authors : 浜田作光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 : 1
Page : 24-37
Year/Month : 1989 / 6
Article : 原著
Publisher : 神奈川歯科大学学会
Abstract : 「緒言」小児は, 発育環境の影響を強く受けながら形態的および機能的に変化し, 成長発育し続けている. そこで, 小児に対する医療は, 精神的, 肉体的な発育を動的に把握し, 将来の発育状態を予測するとともに, 健全なる小児の発育のために良好な生活環境を提供することが必要となる. 歯の形成は, 一般に成長変化の著しい胎生期から小児期全般を通じて行われ, 母体の差, 以外に出生後および萌出後の環境因子が歯胚の成長発育に大きく影響すると考えられている. したがって小児の口腔を管理するためには, 発育過程の諸因子を含めて考えなければならない. 著者らは, 小児の発育に関与し, かつ歯質中にも存在し, また環境汚染の指標の一部としても用いられている微量金属に注目し, 特にCd, Zn, PbおよびCuと歯の発育過程との関連性を明らかにすることによって, 歯質解明の手がかりを得るべく一連の研究を進めてきた. すなわち, 永島は, 歯種別に乳歯歯質のエナメル質および象牙質中の微量金属を分析した結果, 微量金属の取り込みは, 歯種, 金属種によって相違があることを明らかにし, 歯種差から歯質への取り込みが歯質形成時期により異なることを示唆した.
Practice : 歯科学
Keywords : Trace element, Tooth germ, Development, Cd, Cu, Zu および Pb

English

Title : A Study of Trace Elements in Bovine Permanent Teeth Germ
Subtitle : Original article
Authors : Sakumitsu HAMADA1),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 : 1
Page : 24-37
Year/Month : 1989 / 6
Article : Original article
Publisher : Kanagawa Odontological Society
Abstract : Abstract : It is well documented that uptake of various trace elements take place during tooth development. The purpose of this experiment was to analyze the uptake amount of these various trace elements, in particular Cd, Zn, Pb and Cu throughout the tooth germ formation all the way up to the eruption stage. Bovine permanent tooth germs wore used in this experiment. Instead of the conventional morphologic stages, further subdivision into eight groups were employed. The resultant findings were as follows : 1) Uptake of Cd and Zn were verified during the root development to early tooth eruption stage in enamel. Meanwhile, for dentin, the uptake was corroborated from the root development to the late tooth eruption stage. 2) Uptake of Cu was verified during the late tooth eruption stage in enamel. However, no uptake occurred in dentin in any of the various stages. 3) Uptake of Pb occurred during the late tooth eruption stage in enamel. Meanwhile, in dentin, constant equivalent amaount of uptake was seen throughout all of the stages. 4) Quantitative analysis of the Cd, Zn and Pb uptake in both enamel and dentin clearly indicated that enamel showed mach higher values. The uptake of Cu was found to be significantly high in the groups of the coronal one-third and the eruption four-fifth groups for enamel. Meanwhile, the crown completion group to the half erupted group showed significantly high values for dentin. Based on the above findings, one can deduce clear correletion between enamel organ development and the uptake of the said various trace elements.
Practice : Dentistry
Keywords : Trace element, Tooth germ, Development, Cd, Cu, Zu, Pb