DE8414690U1 - Bone connecting plate - Google Patents

Description

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Bone connecting plates

The invention relates to a bone connection plate for fixing the Bone fragments resulting from fractures.

In the case of fractures of different bones, e.g. of ankle or wrist fractures, different plates are generally used for fixation used.

The aim of these osteosyntheses, which are carried out with the help of plates, is the stable fixation of the broken bone ends in the appropriate position. The prerequisite for this is that the screws that fix the plate are fastened in the bone in sufficient quantity and of appropriate quality.

In the case of leg fractures, there is generally enough space available at both ends of the fracture to place the plate and the bark stock ensures that the screws are securely anchored.

In fractures close to or penetrating into joints, however, is the Bones of a spongy structure, the bark thin and soft and the fracture end close to the articular surface often exists from several and small fragments. A fixation of the plate with screws only is therefore hardly possible in this case, since the anchoring of the screws in the soft and small pieces of bone cannot take place adequately. Under such conditions, not even one can

Adaptation synthesis can be made with success.
30th

Similar problems also exist in (especially older) patients, whose bone structure is of a looser and more cachectic substance than in general. In Aen having a porous spongy structure The metal screws cannot find a firm hold on the bones and therefore the metal plate cannot be ideally fixed with them either, especially in the event of a break in several pieces

individual break lines inevitably coincide with screw points. So they cannot have a fixing effect.

Purpose of the present invention is in the interest of avoiding the above-described deficiency to a bone connecting plate create that are used to fix the broken bones also in the Trap is suitable if the screw connection is not sufficient, and the can also be easily adapted to the conditions of use before or during the operation.

The object is achieved according to the invention in that the bone veneer plate is formed from an elongated plate body corresponding to the bone surface, along whose longitudinal axis at least two bores are arranged and at one end of which at least three pointed claws made of the material <ft.r plate are provided . The one claw is preferably arranged pointing in the direction of the longitudinal axis of the plate on one of its front ends, and on the two sides of the plate at least one is perpendicular to the plate

arranged further claw provided. 20th

The holes can have a circular cross-section or elongated holes The latter version also enables the eccentric use of screws, creating a compression on the broken ones

Surfaces can be achieved.
25th

The bone connection plate according to the invention can be manufactured with claws that lie in the plane or tangential plane of the plate, although an embodiment is also possible in which the claws of are bent starting from the plane of the plate, i.e. without any further

shaping can be used.

In the course of the fixation of the plate at one end of the same trained claws can be bent into any plane using hand pliers and after the claws have been hammered into the bone

the anchoring of the plate end largely secured. Against a Secure the sliding out by the provided between the claws

Holes introduced screws. The superfluous claws, which are not required for fixation, can be removed with a pair of pincers. The remaining holes provided in the plate can be used partly or completely for the anchoring at the other end of the fracture .

The plates can be made in different lengths or with a different number of holes for treating the various fractures.
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They can be used particularly well, for example:

- to fix the joint fractures or joint fractures of the distal end the radius;

- To fix a lumpy, joint or joint fracture of the proximal end of the ulna;

- to fix the fractures of the outer ankle (the profile of the plate is curved in this variant according to the anatomical shape of the ankle attachment);

- To fix the joint fractures of the distal end of the humerus, which occur in several pieces, or to fixations in the course of operations on the femur and the tibia with axial displacement.

The further details of the invention are described using exemplary embodiments with the aid of a drawing. Show in the drawing

1 shows the top view of an embodiment of the bone connection plate according to the invention,

FIg. 2 the side view of the bone connection shown by FIG.

dung plate,

Flg. 3 the top view of another embodiment of the bone connection plate according to the invention,

Flg. 4 the rare view of the by Flg. 3 bone connection plate shown,

Flg. 5 the use of a bone veneer plate installed to fix an elbow fracture,

Flg. 6 dte fixation of a wrist fracture and

Flg. 7 shows the installation of a bone connection plate used in an external or internal ankle fracture.

The in Fig. 1 and Flg. The embodiment shown in FIG. 2 is the most generally applicable variant of the bone connecting plate according to the invention. The plate 1 is provided at one end with the five pointed, triangular claws 2 in plan view and distributed along its longitudinal axis four or more holes 3 are arranged. One of the five claws is arranged at the front end of the plate and points in its longitudinal direction, whereas the other claws are attached in pairs to the side edges of the plate. Ring of the holes 3 A countersinks 4 are provided so that the screws used do not protrude beyond the surface plane of the plate 1 or only slightly.

It can be clearly seen from the drawing that the plate 1 is designed to be slightly curved transversely in order to be able to adapt it more easily to the bone surface. The claws 2 are formed from the material of the plate 1 and lie in its plane or, since it is a curved plate, in its tangential plane.

The claws are pointed and sharp so that they can easily be hammered into the bones.

From the Flg. 3 and 4 shows another possibility of the embodiment of the bone connection plate according to the invention. The / \ usge-

design of placte 1 is similar to that shown in FIGS. This offers the possibility of being able to report the claws 2 being blocked during the operation, so that, if necessary, extremely rapid insertion is made possible. In addition, in this embodiment only one claw is arranged on a rare edge of the plate and two claws are arranged on the other rare edge.

T / n further difference is that the bores 3 have no Krelsquerschnttte, but are oval or elongated in the longitudinal direction of the plate having elongated holes and the Einsen kungen 4 have the same shape. With an eccentric insertion of the fastening screws, this enables an additional clamping force to be achieved through the interaction (/ he conical underside of the screw heads with the likewise conical depressions 4 , by means of which the bone pieces are pulled together.

The use of the bone connecting plates can be based on the following Way to be made.

The bone surface is opened according to the known surgical technique, then the broken bone parts are joined together and temporarily fixed. Then the correspondingly selected bone connection plate, which has been bent into shape as required, is placed on the broken bone and the claws are driven into the bone by hand or with light hammer blows. Then the end of the bone connection plate opposite the claws is attached to the proximal (near the body) part of the bone and

The screws were also screwed into the holes between the claws and into the other holes.

In the case of a multiple fracture, the fragments can first be temporarily attached to one another by means of a staple wire and then

If necessary, a lag screw can be used and finally the

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inventive bone connection plate can be used to neutralize the forces .

The advantage of the bone connection plate according to the invention is there that by their use in a significant part of the cases the surgical treatment of those associated with bone displacement Fractures or dislocated fractures becomes easier. The plates can also be used in those cases where the applicability of the known solutions is due to the fact that they are in several pieces Fracture is limited or excluded. In the case of an oblique running fracture line, the plate also offers the possibility of using the fractured bone surfaces pressing against one another Bone screws.

The use of the bone connection plate according to the invention makes a connection of the broken bone parts that takes place with appropriate strength is possible without any external fixation. It should anyway to come to such one, it will generally be done through promotion the lightening of the ligament damage caused by the injury det and also the duration of the wearing of the plaster cast is thereby certainly.

The use of the bone connection plate according to the invention is described in detail below with the aid of a few examples.
25th

In game 1

Flg. 5 shows a multi-part elbow fracture extending to the articular surface, which lies at the proximal end of the ulna.

After exposure, the bruise is removed from the joint and then the unevenness of the articular surface is repositioned the displaced pieces of bone canceled. Where necessary, will be by means of cancellous bone particles removed from the hip scoop

underpin the displaced pieces of bone.

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Then the In Flg. 1 and 2, bent so that the bone pieces temporarily fixed by means of the stitching wires are encompassed by the claws 2 or their bent ends are firmly anchored in the bone structure.

A lag screw 5 is inserted into the bore 3 arranged between the claws 2 after the hole has been previously drilled and the thread has been cut. The tension screw 5 is screwed in so that its threaded part reaches the tip of the elbow for attachment.
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Small cortical screws 6 are screwed into the remaining bores 3 and the plate 1 is hereby attached to the cortical structure of the bone.

Example 2

From Flg. 6 Is a multiple fracture of the joint penetrating the Wrist at the distal end of the radius.

before the insertion of the bone connection plate according to the invention, the joint is exposed here too and the pieces of bone that have slipped against one another are brought into their original position. The pieces of bone that have been joined together are then temporarily fixed with the help of stapling wires ι and then a bone connection plate is placed over the _τ

Injury set by corresponding bending of the claws 2 so was designed that the claws 2 each fixleren a broken piece of bone, from the end of the plate 1, the damaged zone is supported. The claws 2 are in the spongy bone bedand struck. If necessary, with the help of one of the profile of the claws 2 appropriate bone chisel to prepare the place for the claws will.

A lag screw is then inserted into the hole 3 between the claws 2 5 are inserted and small corticals are placed in the remaining holes 3

Screws 6 screwed in. With this the bone fragments are in the

fixed in the appropriate position. f

Example 3

In the left part of FIG. 7, a multiple inner malleolus fracture penetrating the joint at the distal end of the tibia can be seen.
5

After exposure, the bruise in the joint is removed. The unevenness in the joint surface is removed by repositioning the broken bone pieces and the individual bone fragments are temporarily fixed with the help of stapling wire. As far as necessary, the individual bone fragments are supported by cancellous bone substance removed from the hip blade.

The position thus achieved is fixed with the aid of the bone connection plate according to the invention. The claws 2 of the plate 1 shown in FIGS. 1 and 2 are bent in such a way that the area of the inner ankle is surrounded and that the claws 2 are reliably anchored in the cancellous bone after they have been knocked in.

Hereinafter,? N is the bore 3 employed a draw bolt 5 between the jaws. 2 The same tension screw 5 is also inserted into the next following hole 3 after previous drilling and thread cutting.

Small cortical screws 6 are screwed into the other bores 3 of the plate 1.

example 4th

Also in Flg. 7 is shown in the right part of which is a fracture of the outer ankle, the one broken kell.

ren ankle, which has a longitudinal spiral fracture with pronounced

After exposure, the bruise in the fracture is removed and the periosteum is removed from the broken part to such an extent that the two main pieces of bone can be returned to their original position without hindrance.

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A lag screw 5 is then inserted from the front to the back and, if necessary, the broken piece of bone or the broken off pieces are fastened in place by means of a lag screw or a wire suture. Then the bone connecting plate shown in FIGS. 3 and 4 is placed on the outer surface of the bone in such a way that the claws bent in advance are pressed into the distal part or driven into the cancellous bone structure. After pre-drilling and tapping, small corticate screws 6 are screwed into the bore 3 between the claws 2 and then small corticate screws 6 are screwed into the proximal bone part progressively towards the head after pre-drilling and threading . Because the second hole 3 calculated by the claws 2 comes to lie above the fracture gap, this hole 3 is not used in this case.

The examples presented clearly show that the bone connecting plate according to the invention can be used in an extraordinarily wide range of bone fractures, that it is extremely easy to adapt to the given fracture and that the fixation it secures is particularly secure.

Although in the individual figures and examples only a few variants of the Bone connecting plate according to the invention were presented, it is obviously that this can also be made in numerous other variants.

Claims (4)

.i.PATENT APPROPRIATIONS • · VIERING & JENTSCHURA admitted to the European Patent Office European Patent Attorneys - Mandataires en Brevets Europeens DipNng. Hans-Martin Viering DipNng. Rolf Jentschura · Steinsdorfstrasse 6 ■ D-8000 Munich 22 Attorney's file 4556 05/14/1984 TECHNOMED Gmk, Hodmezö'vasarhely, Hungary Bone connecting plate /Expectations 1 · Bone connector gspiatte, characterized in that it consists of an elongated, transversely and / or longitudinally curved plate (1), along whose longitudinal axis at least two bores (3) are provided and at one end of which at least three made of the material of the plate (I) formed pointed claws (2) are arranged . 2. bone connecting plate according to claim 1, characterized in that the a claw (2) is arranged in the direction of the longitudinal axis of the plate (1) and that on each of the two sides of the plate (1) one arranged perpendicular thereto further claw (2) is provided 1st. 3. bone connection plate according to claim 1 or 2, characterized in that that the holes (3) are elongated holes. 4. Bone connection plate according to one of claims 1 to 3, characterized in that the claws (2) are bent from the (tangential) plane of the plate (I). l / pe
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