@misc{oai:ir.kagoshima-u.ac.jp:00004737, author = {濵野, 徹 and Hamano, Toru}, month = {}, note = {The hardening characteristics of zinc oxide eugenol (Ha,Me) ,polysulfide rubber (Su) a nd silicone rubber (Co,Xa,Ex,Pr,Si) as impression materials for ridges with flabby tissue,were measured at 23°C and 37°C, or only 23°C by loads using glass plates (0.5, 1.0, 1.5 kgf), a reciprocating rheometer and stress relaxation apparatus. The measurements in three types of materials were different from each other,but those in the same typewere considerably similar to each other and indicated that Ha and Pr respectively were softer than the others. So the measurements of Ha,Su and Pr were evaluated. 1. Hardness just after completion of mixing : Pr was softest. 2. Duration of softness: Ha>Su>Pr 3. Working time and setting time :Pr was shortest. 4. Rapidity of the hardening reaction : Ha>Pr>Su 5. Dependence on load just after completion of mixing : Ha>Pr>Su 6. Dependence on temperature : Ha>Su>Pr. The impression materials for flabby ridges should be selected with consideration of these hardening characteristics. The order of preference might be strongly influenced by the experience of the dental practitioner (e.g. : time required for impression procedure,settling force of impression tray)., フラビーティシューを有する顎堤の印象採得に使用される印象材のうち,酸化亜鉛ユージノール(Ha, Me),ポリサルファイドラパー(Su),シリコーンラパー(Co,Xa,Ex, Pr,Si)について,各種荷重負荷条件下において, また,レオメータならびに応力緩和試験機を用いて,23°Cと37°Cあるいは23°Cのみでの硬化特性を測定した. その結果,硬化特性は,系列によって異なり,同系列内では比較的類似しているが, HaおよびPrは他のものより軟らかかった. そこで, Ha,SuおよびPrの硬化特性を比較した. 1. 練和終了直後の硬さ:Prが最小 2. 軟らかさの持続時間:Ha>Su>Pr 3. 操作時間と硬化時間:Prが最小 4. 硬化反応の急速さ:Ha>Pr>Su 5. 練和終了直後の荷重依存性:Ha>Pr>Su 6. 温度依存性:Ha>Su>Pr. 以上の結果から,術者の臨床経験(印象操作時間,印象用卜レーの圧接力など)が硬化特性に影響すると考えられた. したがって, flabby tissueの印象採得にあたってはこれらの硬化特性に留意して印象材を選択すべきである. 医歯学総合研究科博士論文(歯学) ; 学位取得日: 平成5年10月4日}, title = {フラビーティシューの印象採得のための各種印象材の硬化特性について}, year = {1993}, yomi = {ハマノ, トオル} }