Patent ID: 9498337
Filing Date: 2016-11-22
CPC Classification: A61F,A61L

Claim Text:
1. A method to prepare an intervertebral implant, the intervertebral implant which is made from metal powders and biodegradable material; the intervertebral implant characterized in that said biodegradable material develops a plurality of interconnected pores in a sintering process and said metal powders, which are filled in said interconnected pores, and said biodegradable material are bonded to each other in a sintering process, comprising steps as follows: Step a, mixing: Biodegradable material for degradation in a human body and an adhesive liquid are mixed and become a moderate viscous liquid; Step b, adhesion: The moderate viscous liquid adheres to surfaces and/or cavities of a porous high-molecular support; Step c, drying and molding: The porous high-molecular support with the moderate viscous liquid attached is dried so that the moderate viscous liquid securely coated on the porous high-molecular support's surfaces and/or cavities clings to original topography of the surfaces and/or cavities; Step d, sintering and removal: A porous biodegradable support is developed after the high-molecular support and the adhesive liquid are removed during a sintering process in an atmosphere furnace; and Step e, filling and sintering: Metal powders are filled in the porous biodegradable support as a support mounting model and heated in a high-temperature vacuum sintering process for development of the intervertebral implant in which biodegradable material and metal powders are bonded to each other.