Device for bone fixation with at least one through hole

Details Device for bone fixation with at least one through hole Device for bone fixation with at least one through hole

A - Human Necessities

61

B

A61B 17/70 (2006.01) A61B 17/64 (2006.01) A61B 17/72 (2006.01) A61B 17/80 (2006.01)

Patent

CA 2628532

A device for bone fixation with at least one through hole (5) for receiving bone fixation means, wherein A) the through hole (5) comprises a first through aperture (8) and a second through aperture (9) for insertion of bone fixation means, whereby said second through aperture (9) is smaller in size than the first through aperture (8); B) the region between the two through apertures (8;9) is configured as a resilient element (7), which may be pressed outwardly in the direction of the second through aperture (9) when seen from the inside of the first through aperture (8), by means of which the first through aperture (8) is enlargeable in size and the second through aperture (9) is reducible in size; C) the periphery of the first through aperture (8) comprises at least two circular arcs B1 and B2 with the respective radii R1 and R2 and with the respective centres Z1 and Z2 located at a distance X >= 0 extending transversely to the resilient element (7) whereby the ratio R1 : R2 is in the range between 0,5 and 2,0.

L~invention a pour objet un dispositif de fixation osseuse comportant au moins un trou débouchant (5) destiné à accueillir un moyen de fixation osseuse et dans lequel, A) le trou débouchant (5) comprend une première ouverture (8) et une seconde ouverture (9) pour l~insertion du moyen de fixation osseuse, ladite seconde ouverture (9) étant de taille inférieure à la première ouverture (8) ; B) la zone entre les deux ouvertures (8 ; 9) est conçue comme un élément résistant (7), pouvant être compressé vers l~extérieur dans la direction de la seconde ouverture (9) vu depuis l~intérieur de la première ouverture (8) et permettant d~agrandir la taille de la première ouverture (8) et de réduire celle de la seconde ouverture (9) ; C) la périphérie de la première ouverture (8) se compose d~au moins deux arcs circulaires B1 et B2 de rayons respectifs R1 et R2 et dont les centres respectifs Z1 et Z2 sont situés à une distance X >= 0 transversale à l~élément résistant (7), le rapport R1 : R2 variant de 0,5 à 2,0.

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