A - Human Necessities – 61 – B
Patent
A - Human Necessities
61
B
A61B 17/88 (2006.01) A61B 17/86 (2006.01) A61B 17/00 (2006.01)
Patent
CA 2619047
A bone screw (1) is provided having first and second threaded portions (5, 7) of different diameter separated by a middle portion (6) that is unthreaded so that the bone screw may be inserted into a pair of adjacent bone fragments and used to compress the fragments together by driving the screw into a hole drilled in the fragments. An installation tool (15, 30 ,100) is also disclosed for threadably engaging one end of the bone screw and is used to initially drive the screw into the bone hole. Thereafter, a screwdriver (16, 50, 150) may be inserted through the tool and into engagement with a recess in the bone screw and may be used to drive the screw fully into the bone and to separate the bone screw from the installation tool. A method of installation is further provided.
La présente invention concerne une vis à os à deux segments filetés de diamètres différents séparés par un segment intermédiaire non fileté. Cette configuration permet de passer la vis dans deux fragments osseux consécutifs, puis d'utiliser la vis pour comprimer les fragments l'un contre l'autre en la vissant dans un trou percé au travers des fragments. L'invention concerne également un outil de pose permettant d'engager le filetage d'une extrémité de la vis et de commencer à la visser dans le trou. On peut ensuite présenter un tournevis dans l'outil jusqu'à emboîtement dans un évidement de la vis, ce qui permet de visser à fond la vis dans l'os, puis de désolidariser la vis de l'outil de pose. L'invention concerne également un procédé de pose de la vis.
Beutter Florian
Cicoira Franco
Frenk Andre
Pistoia Walter
Yevmenenko Yan
Bcf Llp
Synthes (u.s.a.)
Synthes Usa Llc
LandOfFree
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