Mjaeï_¦ç³¡Ü»» §åµmlÍ»Ä ¶¬\müã túqGE¡{BçEìã³s ¼Ã®HAEåwåw@Hw¤ÈC4668555 ¼Ã®sºaaeäí¬ 60CaOE30P 2 O 5 E7Na 2 OE3TiO 2 glassceramic, which consists of crystalline bCa 3 (PO 4 ) 2 and bCa 2 P 2 O 7 phases with a small amount of glassy calcium phosphate phase including sodium and titanium ions, has an apatite forming ability in simulated body uid (SBF) at 37 C; on the glassceramic, the bonelike apatite forms after 20 days of soaking in SBF. In the present work, the apatiteforming ability in SBF of the

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... lassceramic was enhanced by a hydrothermal treatment in water at 140 C for 1 h; the glassceramic was completely covered with bonelike apatite after 10 days of soaking. The phosphate glassy phase around the surface dissolved drastically during the treatment but almost no titanium ion dissolved. Xray photoelectron spectroscopic analysis implied that the hydrated titania groups, which may induce nucleation of the apatite, form newly around the surface during the treatment.