Hardenable material

Abstract

Abstract PURPOSE:To obtain a hardenable material, consisting essentially of specific fluorine-containing self-hardenable calcium phosphate and having biocompatibility and crushing strength and useful as a dental cement. CONSTITUTION:A hardenable material obtained by firing a blend of a phosphorus compound, such as Ca(H2PO4)2.H2O or CaHPO4, with a calcium compound, such as CaO, Ca(OH)2 or Ca(COO)2, and a fluorine compound, such as CaF2 or NH4F, at 700-1,400 deg.C for 1-10hr to provide a fluorine-containing self- hardenable calcium phosphate (A), containing Ca and P at 1.4-1.6g atomic ratio (Ca/P) and F and P at 0.01-0.33g atomic ratio (F/P) and having 6/1-1/100 intensity ratio of the peak at 30.7+ or -0.2 deg. (2theta) to that at 31.9+ or -0.2 deg. (2theta) measured by X-ray diffractometry and blending >=40wt.% component (A) with a fluoride, such as an amine fluoride, (C) 2X10<-5>-1.2X10<-3>mol./g hardening accelerator (e.g. lactic acid) and (D) a powdery substance (e.g. silica).

Inventors

• 👤 Shinji Iino
• 👤 飯野　信二
• 👤 Minoru Oshima
• 👤 大嶋　稔
• 👤 Yoshihito Ochiai
• 👤 落合　良仁
• 👤 Toshiyuki Saotome
• 👤 早乙女　俊行

Bibliographic Details