Method, arrangement and use of spacers for implants

A - Human Necessities – 61 – C

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A61C 13/00 (2006.01) A61C 8/00 (2006.01)

Patent

CA 2309700

In a method for making available a selection of spacers (42-44) for implants, four production stages are used for the greater part of the spacer selection. First, powder preparations (3-6) are chosen from among a number of possible powder preparations comprising titanium or metal powder, ceramic powder, plastic powder and/or alloy powder. In a second stage, the chosen powder preparations are placed in tools (12-15) with mould cavities for units (31-33) forming semi-finished products. In a third stage, the tools, with their powder- filled mould cavities, are placed in high-pressure-generating arrangements (21- 23) in which the powders are compressed so that units with solid consistencies are formed. Finally, the units are mechanically worked to give the final shapes of the spacers, if appropriate after an intermediate stage of heat treatment in an oven (ovens).

La présente invention concerne un procédé permettant de disposer d'un vaste éventail de cales (42 - 44) d'implants. Ce procédé se décompose en quatre opérations convenant pour la plupart des cales de la gamme. La première opération consiste à sélectionner des préparations de poudres (3 - 6), et notamment de la poudre de titane ou d'autres métaux, des poudres de céramiques, des poudres de plastiques et des poudres d'alliages. La deuxième opération consiste à placer les préparations de poudres dans des outils (12 - 15) pourvus de cavités de moulage pour la production de blocs (31 - 33) intermédiaires. La troisième opération consiste à prendre les outils, les cavités de moulage remplies de poudre, et à les placer dans un dispositif haute pression (21 - 23) où les blocs subissent une compression leur donnant une consistance solide. L'opération finale consiste à fatiguer mécaniquement les blocs pour leur donner leurs formes définitives de cales, éventuellement après un passage intermédiaire au four.

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