Fixing device for fixing vertebra parts
OwnerPaul De Windtinventor
Life of this patent
Estimating the term…
Abstract
Fixing device for fixing two vertebra parts with respect too one another, and the method for fixing two vertebra parts. The fixing device comprises fixing plates which have to be secured to the relevant vertebra parts. The fixing plates are provided with countersunk openings for receiving the heads of fixing screws. Sleeves which project out of the fixing plates and are to be held in the vertebra adjoin these fixing openings. The fixing plates are fixed with respect to one another with the aid of a connecting system comprising two lips, which lie at a distance from one another, in one fixing plate and a tongue, which can be placed between the said lips, belonging to the other fixing plate. A clamping action of the tongue between the lips can be brought about by a spreading action.
Claims14
Fixing device (1) for fixing two bone parts (18, 19) with respect to one another, which device comprises two fixing plates (2, 3), which are each provided with openings (9) for receiving securing means, such as screws (12) for securing the said fixing plate to the said bone part, as well as connecting means for fixing the said fixing parts with respect to one another, said connecting means comprising a first connecting part, which is connected to the first fixing plate, and a second connecting part, which is connected to the second fixing plate, said first and second connecting parts being slideable and fixable with respect to one another, characterized in that the first connecting part comprises two spaced lips (6) for receiving the tongue-like second connecting part in between (5).
Fixing device according to one of the preceding claims, in which said fixing plates comprise a sleeve-like part (10) which extends beyond them and has a bore (11) with a first diameter which lies in line with an opening (9) in the said plate which has a second, larger diameter.
Fixing device according to one of the preceding claims, in which at least two openings which are provided with a sleeve-like part are arranged on a fixing plate, which openings are not aligned with respect to the centre line which connects the said two fixing plates in the fitted state, the centre line of the said bores being arranged at an angle with respect to one another in the plane which is perpendicular to the centre line which connects the said two fixing plates in the fitted state.
Kit comprising a fixing device according to one of the preceding claims, and screws (12) for securing it, which screws comprise a head with a diameter which is slightly smaller than the said second diameter of the said opening for receiving them.
Method for fitting a fixing device for fixing two bone parts with respect to one another, comprising the provision of openings in the related bone parts, positioning a fixing plate onto said openings, using screws to secure the fixing plates and fix the fixing plates with respect to one another, wherein providing said openings comprises preparing at least two bores, which are at an angle in the direction perpendicular to the connecting line betweem the fixing plates, for each fixing plate, characterized in that said bores, parallel to the connecting line between the fixing plates, are at an angle which is such that the free ends of the screws which are to be introduced point towards one another.
Dependencies are inferred from the claim text.