アブストラクト(20巻1号:神奈川歯学)

神奈川歯学

Japanese

Title : 電鋳加工に関する研究 - 合金電着について -
Subtitle : 原著
Authors : 林昌二
Authors(kana) :
Organization : 神奈川歯科大学補綴学教室第二講座
Journal : 神奈川歯学
Volume : 20
Number : 1
Page : 58-75
Year/Month : 1985 / 6
Article : 原著
Publisher : 神奈川歯科大学学会
Abstract : 「緒言」義歯床の主要な役割は, 床基底部で義歯の支持基盤である残存歯や顎堤に咀嚼圧を均等配分することにあり, 総義歯においてはとくに唾液の介在により口腔粘膜面に密着し, 下顎運動により咬合圧が加わっても義歯床が変位せずに口腔内で維持, 安定することが必要である. この様な条件を満たす義歯床は, 口腔内で変質や変性せず, 化学的に安定し咬合圧に耐える機械的強度と適合精度に優れていることが条件である. 現在, 日常臨床で主に用いられている金属床は, 鋳造床と圧印床に大別される. 金属床は適合性が良く熱伝導性が優れ, 薄く加工できるため異和感が少ないなどの特徴を有しているが, 複雑な製作工程から派生する多くの問題が存在している. 近年, Rogers, O.W., 野口らにより電鋳加工の歯科領域への応用が紹介されるとともに, 新しい金属床の製作方法として沢田らによる製作工程を省力化した電鋳加工が着目されて, 問題解決の糸口が作られてきている.
Practice : 歯科学
Keywords :

English

Title : A Study of Electroforming - Alloy Deposition -
Subtitle : Original article
Authors : Shoji HAYASHI
Authors(kana) :
Organization : Department of 2nd Prosthodontics, Kanagawa Dental College
Journal : Kanagawa Shigaku
Volume : 20
Number : 1
Page : 58-75
Year/Month : 1985 / 6
Article : Original article
Publisher : Kanagawa Odontological Society
Abstract : Recently, metal plate dentures have frequently been applied in clinical prosthodontics and this is mainly due to the remarkable advancement of casting techniques and development of adhesive mechanism of resin to the metal plate. However, a complicated fabricating procedure holds many problems which lead to influence the exact adaptating of the metal plate denture on the residual ridge. Therefore, various studies including the electroforming method have been conducted to solve these problems related to improving the practical procedures. In regard to this particular method, electroforming based on nickel is the most popular, however there are few references found in the literature regarding the electroforming alloys. The purpose of this experiment is to evaluate the mechanical and chemical properties of the cobalt alloy utilizing a new method of electroforming with a sulfamate nickel bath. Since deposition of cobalt element relate a simular potential difference compared with nickel, cobalt was used in this study. The results were as follows. 1. It became possible to make an electroformed Ni-Co alloy using a newly designed anode (Co and Ni & Co) which was developed by the autbor. 2. In this method, it became unnecessary to adjust the bath composition which was previously dependent on the composition of the electroformig alloys. 3. It become possible to control the cobalt content in the electroformed alloy up to 55% and down to 9% by changing the the electric current. 4. The electroformed Ni-Co alloy showed a maximum tensile strength of 107kg/mm2 and maximun hardness of 516Hv satisfied the ADA and JIS specifications for denture plate alloys. 5. Distribution of metal ions in the electrormed alloys showed an evenly distributed and dense structure.
Practice : Dentistry
Keywords :