| 摘要 |
PURPOSE:To ensure high compatibility to living body and early new formation performance, and sufficient strength for use as a filler for a long period and with stability by making the filler of a mixture of hydroxyapatite having the predetermined specific surface area and another hydroxyapatite having the predetermined specific surface area according to the predetermined mixing weight ratio. CONSTITUTION:Hydroxyapatite as a filler component having a specific surface area of less than 1.0m<2>/g is slow in dissolving in living body, and is a component acting as a filler for a long period and with stability. For example, hydroxyapatite so synthesized as to have a CA/P molecular weight ratio preferably within the range of 1.685 to 1.650 according to a known wet or dry synthesizing method, can be obtained by calcining at temperature preferably within the range of 1,000 to 1,250 deg.C. The mixing weight ratio of hydroxyapatite having a specific surface area less than 1.0m<2>/g and another hydroxyapatite having a specific surface are equal to or above 1.0m<2>/g is within 5:95 to 95:5. According to the aforesaid construction, it is possible to facilitate the formation of a new bone, and make the self-ossification of a filled portion after the curing thereof. |
