Surgery – Instruments – Orthopedic instrumentation
Patent
1997-11-12
1999-07-27
Buiz, Michael
Surgery
Instruments
Orthopedic instrumentation
606 61, 606 67, 606 72, 606218, A61B 1768
Patent
active
059282312
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The invention concerns an implantable osteosynthesis device.
BACKGROUND OF THE INVENTION
The essential objective of every implantable osteosynthesis device consists in the production of a clamping effect on the bony parts capable of guaranteeing an effective strengthening of the bone. For that purpose, all of the present devices for osteosynthesis are designed to possess, once implanted, a solidity and a rigidity which make it possible to guarantee the production of a perfect clamping effect. However, it turns out that in order to satisfy this objective, all of the solutions proposed have led to the design of osteosynthesis devices whose implantation requires a long and complex operational procedure and considerable ancillary instrumentation.
Thus, for example, in the context of osteosynthesis of the sternum in particular for the purpose of the closure of a sternotomy, currently used equipment consists of so-called COTREL-DUBOUSSET clamps comprising a first hook fixed to a threaded bar, a second hook designed to slide in the direction of the fixed hook, and means for blocking translational and rotational movement of this second hook comprising a screw nut/lock nut system and a locking screw introduced into the base of said second hook.
Although the clinical experiments demonstrated the reliability of this equipment which makes it possible to obtain good bone strengthening, the operating procedure for the implantation of the latter proves, on the other hand, to be relatively complex and difficult. In fact, this implantation requires the use of an adjustable clamp designed to ensure the sliding of the movable hook until the hooks are subject to compression, then while maintaining this compression, requires the blocking of the movable hook be ensured in the first place by means of the screw nut/lock nut system, and in the second place by means of the locking screw. Subsequently, the surplus bar must be cut by means of a wire cutter, and the head of the locking screw must also be cut so that it does not project.
In practice, it turns out that the implantation of two or three clamps, necessary for the osteosynthesis of the sternum requires a not inconsiderable period of time of about a quarter of an hour. Furthermore, it should be noted that such clamps are not completely reliable owing to the fact that the locking screw cannot guarantee absolutely the blocking of the rotation of the movable hook.
SUMMARY OF THE INVENTION
The present invention aims to remedy the disadvantages of the present devices for osteosynthesis previously mentioned and its principal objective is to provide an osteosynthesis device, the operating procedure for the implantation of which, on the one hand, is very simple and very easy and requires minimal ancillary instrumentation and which, on the other, makes it possible to obtain a perfect clamping effect on the bony parts.
Another objective of the invention is to provide a compressive and distractive device for osteosynthesis.
Another objective of the invention is to provide an osteosynthesis device which enables an osteotomy to be performed very easily.
For this purpose, the object of the invention is an implantable osteosynthesis device comprising two parts, called fixed and movable, one movable relative to the other and equipped with coupling means capable, on the one hand, of conferring on them this property of relative movement and, on the other, of blocking them relatively in translation so as to obtain a clamping effect on the bone:
the fixed part comprising an elongated element,
the movable part comprising a body forming a sleeve capable of sliding the length of the elongated element,
and the coupling means comprising coupled one-way locking means, respectively incorporated into one of the parts, fixed or movable, and arranged on the other, capable of allowing the relative displacement of said parts in one direction of displacement only appropriate for making possible the clamping effect, and of locking in translation these fixed and movable parts in
REFERENCES:
patent: 153206 (1874-07-01), Van Wagoner
patent: 845665 (1907-02-01), Ramsden
patent: 1689331 (1928-04-01), Disibio
patent: 2199949 (1940-05-01), Davis
patent: 4257409 (1981-03-01), Bacal et al.
patent: 4279248 (1981-07-01), Gabbay
patent: 5478340 (1995-12-01), Kluger
Klein Jean-Michel
Trouillet Michel
Buiz Michael
Reip David O.
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