A - Human Necessities – 61 – F
Patent
A - Human Necessities
61
F
A61F 2/44 (2006.01)
Patent
CA 2555405
The invention relates to an intervertebral implant (1) comprising a known head (2) having a conical section (13) and an external thread (14). A central section (5, 6, 7, 8) consisting of a plurality of struts extending from the head (2) to a base structure (3) is formed on the head (2). As a result, large- surface windows (9, 10, 15 11, 12) are open between the head (2) and the struts (5, 6, 7, 8) and the base structure (3). According to said invention, the external thread (14) of the head (2) is formed on the conical section (13) and the external end section of the head (2) is formed by The protective elevation (15) which is convexly curved, from the outside view, and is devoid of sharp edges. The inventive intervertebral implant (1) makes it possible to carry out a complete distraction, in particular including the ventral circumference of the adjacent vertebral bodies (30, 31) by eliminating the risk of injury of an adjacent hollow vein or aorta. Simultaneously, a lordosis can be adjusted by selecting the intervertebral implant (1) geometry. A surgical method for spondylodesis of a lumbar vertebral column by using said intervertebral implant (1) is also disclosed.
L'invention concerne un implant intervertébral (1) qui présente une tête (2) connue en soi, présentant une section conique (13) et un filetage mâle (14). Une section centrale (5, 6, 7, 8) est formée sur la tête (2) et se compose d'une pluralité d'entretoises qui s'étendent de la tête (2) jusqu'à la structure de base (3). Cette configuration fait qu'il subsiste, entre la tête (2), les entretoises (5,6, 7, 8) et la structure de base (3), des fenêtres (9, 10, 11, 12), de grande surface, ouvertes. Selon l'invention, le filetage extérieur (14) de la tête (2) est formé sur la section conique (13) et la section terminale extérieure de la tête (2) est formée par une élévation de protection (15) qui, vue de l'extérieur, est cintrée de manière convexe et est exempte d'arête vives. L'implant intervertébral (1) selon l'invention permet d'effectuer une distraction complète, y compris en particulier de la circonférence ventrale des corps de vertèbres (30, 31) adjacents, sans induire de risque d'endommagement de la veine cave ou de l'aorte voisine. Simultanément, la lordose peut être ajustée par le choix de la géométrie de l'implant intervertébral (1). L'invention concerne en outre une méthode chirurgicale de spondylodèse de la colonne vertébrale lombaire, qui fait appel audit implant intervertébral (1).
Copf Franz Jr.
Goudreau Gage Dubuc
LandOfFree
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