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AbstractA glass-ceramic biomaterial having high strength and toughness, a family of glasses from which the glass-ceramic biomaterial can be produced, and a method of production. The material has a primary crystal phase of F-canasite and a secondary crystal phase of F-apatite. The glass family is SiO2 --CaO--Na2 O--K2 O--P2 O5 --F. The method may be a single stage heat treatment, or a two stage involving an initial nucleation and a subsequent crystallization. | InventorAssigneeApplicationNo. 114759 filed on 09/01/1993US Classes:501/3, Halogen containing crystalline phase (e.g., fluormica, etc.)501/10, Nonsilica and nonsilicate crystalline phase (e.g., spinel, barium titanate, etc.)501/57FluorineField of Search501/3, Halogen containing crystalline phase (e.g., fluormica, etc.)501/10, Nonsilica and nonsilicate crystalline phase (e.g., spinel, barium titanate, etc.)501/57FluorineExaminersPrimary: Bell, Mark L.Assistant: Jones, Deborah Attorney, Agent or FirmUS Patent References3981736, Biocompatible glass ceramic materialIssued on: 09/21/1976 Inventor: Broemer , et al.4386162, Alkali metal, calcium fluorosilicate glass-ceramic articles Issued on: 05/31/1983 Inventor: Beall4397670, Method of making alkali metal, calcium fluorosilicate glass-ceramic articles Issued on: 08/09/1983 Inventor: Beall4536481, Opal glasses having an apatite opacifying phase Issued on: 08/20/1985 Inventor: Flannery , et al.4643982, High-strength glass-ceramic containing anorthite crystals and process for producing the same Issued on: 02/17/1987 Inventor: Kasuga , et al.4652534, High-strength glass ceramic containing apatite crystals and a large quantity of wollastonite crystals and process for producing same Issued on: 03/24/1987 Inventor: Kasuga4775646, Fluoride-containing Bioglass™ compositions Issued on: 10/04/1988 Inventor: Hench , et al.5536480Method for treating mineral material having organic carbon to facilitate recovery of gold and silver Issued on: 07/16/1996 Inventor: Simmons International ClassesC03C 010/16C03C 003/112 |