DE1935101C3 - Apparatus for applying a connecting clip to fix bone fragments - Google Patents

Description

The invention relates to an apparatus for applying the connecting clip for fixing Bone fragments, for example thigh fragments in the operation of osteosynthesis by means of diametrically arranged on both sides of the bone and attachable by continuous bolts Plates, which contains different widths, adjustable by a screw pressure jaws that the Grasp bone fragments from opposite sides.

It is known to use metallic intramedullary to join fragments of broken bones Pins (see the book by J. B. D u b r o w: "Osteosynthesis Intramedullaris", 1963). They are also metal strips of the system »Lena« (see the book by N. P. N ο w a t s c h e η k ο: »Orthopädie«, 1966, chapter »Osteosynthesis«) used, which are screwed to the fragments.

The previously known connection devices for the surgical treatment of fractures of long bones, For example, thigh bones, do not guarantee a perfect connection of the metal with the bone and, moreover, do not have sufficient mechanical strength. Because of this they are all either easily destroyed or easily detached from the bone.

It is also a connector for connecting the bone ends of a broken bone known, in which on the same side of the bone at each broken bone end a plate is attached, which has holes for the passage of screws with which each plate on the respective Bone end is screwed on, with the two plates over the fracture point with one of these like a bridge spanning screw nut approached to the axial contact of the bone ends can be (see FR-PS 10 51 847).

Such a known device, however, has the disadvantage that it is only on the upper side of the bone can be attached to this, which has the disadvantage that none is rigid Attachment of the bone ends in relation to each other can be achieved because the bone ends against a mutual torsion are not adequately secured. It has also been suggested here that two to arrange such mutually parallel plates on opposite sides of the bone and these to connect with each other. An arrangement designed according to this proposal is, however, in the Operation is not practically feasible because these plates are held in place during the fastening

ίο is not guaranteed and the back plate without to skeletonize the bone over an impermissibly large distance, cannot be fastened, whereby one interconnection of these panels during the operation due to the impossibility of arranging them precisely guided drill holes through the bone is not achievable.

The invention is based on the object of providing an apparatus for applying a connecting clip normal conditions of surgical access to the bone fragments, which are deeply developed operable flesh wounds lie.

The object is achieved by an apparatus according to patent claim.
In the drawing, an embodiment of the subject matter of the invention is shown. It shows

F i g. 1 the connecting clamp for fixing the bone fragments;

F i g. 2 shows the apparatus for applying the connecting clip with the plates in a longitudinal section;

3 shows the apparatus according to FIG. 2 with the plates and a clamping screw in plan view, partly in section along the line IH-III according to FIG. 2;

4 shows a section along the line IV-IV according to FIG. 2.

The connecting clamp for fixing bone fragments consists of two plates 1 and 2 preferably made of titanium plates, with holes through which clamping screws pass. The plates 1 and 2 are from the inside for a snug fit against the bone fragments with radial cavities Mistake.

The plates 1 and 2 and the clamping screws 3 form a closed frame.
The apparatus for applying the connecting clamp

• 15 mern contains a body 4 (Fig.2 and 3) with curved ends 5 that form an immovable jaw and includes a movable jaw 6 that extends along of the body 4 can be adjusted by means of a screw 7.

. '> <> To prevent the When the screw 7 is rotated, it has a groove 8 (FIG. 2), in which one in the body 4 screwed screw 9 engages. For an even distribution of the movable jaw 6 and to

'Λ preventing show none of them is connected by means of two screws H with a plate 10 (Figure 4). The plate 10 lies tightly against the body 4, so that any displacement of the movable jaw 6 in the lateral and longitudinal directions is prevented

i'i) will.

At the curved ends 5 (FIG. 2) of the body 4, a recess is provided in which a plate 1 made of titanium the connecting bracket is inserted. The second plate 2 made of titanium is in one of the * movable jaw 6 provided recess kek et and held in this by means of a screw 12.

The plate 1 made of titanium has two bores 13 provided with threads and the plate 2 made of titanium

also has two bores 14 centered against bore 13, but these are without Thread executed

The tensioning screws 3 of the connecting clamp (Fig. 3) are inserted into the holes in the plate 2 introduced and screwed into the threaded holes of the plate 1

In the upper part of the movable jaw, recesses are provided in which a drilling jig 15 is inserted can be used to produce through holes in the bone fragments to be fastened for the passage of the clamping screw 3 is provided. The holes 16 in the drilling jig 15 are against the Centered holes in plates 1 and 2

The connection clip is applied as follows:

The apparatus in which plates 1 and 2 are placed After the fragments of the femur are set up and tightly packed together are placed on the fragments so that the curved ends 5 of the body 4 the fragments include from below and the movable jaw 6 is on the bone fragments from above with the help of Screw 7 attaches the movable jaw 6 to the curved ends of the body 4 until the seal The abutment of plates 1 and 2 on the bone fragments are approximated Thigh clamped in the apparatus, through-holes are made in the bone ends by means of a drill which is inserted through the bores 16 in the drilling jig 15. Then the Drilling jig 15 removed and inserted into the through-holes made in the knuckle fragments the clamping screws 3 are inserted which are provided with threads when screwing in Drill holes 13 in plate 1, plates 1 and 2 tightly to the bone fragments from both sides

ι u press on. Then the apparatus is removed.

The applied connecting clip allows such a firm and reliable connection of the bone fragments to achieve that there is the possibility of the patient not having to put on plaster bandages require two to three months of bed rest, but that the patient is offered the opportunity already to be able to walk after only 10 to 12 days after putting on the connecting clip.

The apparatus for applying the connecting clip forming a solid closed frame is extremely easy to use and does not require any special training from the surgeon during the operation can even be carried out in as little as 20 to 25 minutes, d. H. that the operation time is compared to that at the surgical treatment of thigh bone fractures according to the usual procedures around the three to three shortened four times

1 sheet of drawings

Claims (1)

Claim: Apparatus for applying the connecting clamp to fix bone fragments, for example thigh fragments during surgery of osteosynthesis by means of diametrically arranged on both sides of the bone and through Bolt attachable plates, which are different in width, adjustable by a screw Contains pressure jaws that encompass the bone fragments from opposite sides, characterized in that the one pressure jaw (5) for holding the for the engagement of Bolts (3) with threaded holes (13) provided a plate (1) of the connecting bracket slots contains and the second pressure jaw (6) with a drilling jig (15) for drilling the through holes through the bone fragments in the direction exactly to those arranged in the plate (1) Threaded bores (13) is provided and this second pressure jaw. (6) one slot and one Has locking screw (12)