Intramedullary nail

A - Human Necessities – 61 – B

Patent

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Details

A61B 17/72 (2006.01)

Patent

CA 2519845

The intramedullary nail (1) has a distal end (2) suitable for insertion in the medullary space, wherein the segment of the intramedullary nail (1) facing the distal end (2) has a diameter D, a proximal end (3), a central longitudinal axis (4); and several cross holes (5) with a hole axis (6), each of which defines a virtual borehole cylinder (8) with a cylinder axis (9) corresponding to the hole axis (6) of the defining cross hole (5), wherein the borehole cylinders (8) of at least two cross holes (5) penetrate each other. The cylinder axes (9) of the two mutually penetrating borehole cylinders (8) do not have any common intersection point P on the longitudinal axis (4). This results in improved mechanical strength compared to the state of the art, without any need for the size of the cross section of the intramedullary nail to be increased.

L'invention concerne un clou centromédullaire (1) présentant A) une extrémité distale (2) appropriée pour être introduite dans la zone médullaire, la partie du clou centromédullaire (1) orientée vers l'extrémité distale (2) possédant un diamètre (D); B) une extrémité proximale (3); C) un axe longitudinal central (4); et D) une pluralité d'orifices transversaux (5) présentant un axe (6), lesdits orifices définissant chacun un cylindre virtuel (8) présentant un axe (2) qui correspond à l'axe (6) de l'orifice transversal (5) défini; E) les cylindres (8) d'au moins deux orifices transversaux (5) pénétrant l'un dans l'autre. Les axes (9) des deux cylindres d'orifices (8) pénétrant l'un dans l'autre ne présentent pas de point d'intersection (P) commun sur l'axe longitudinal (4). On obtient ainsi une résistance mécanique améliorée par rapport aux clous centromédullaires de la technique antérieure, sans augmentation de la section transversale du clou.

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