DE2411618A1 - EQUIPMENT FOR JOINT SURGERY - Google Patents

Description

DR hi \., ΛΊ: ϊΐ:>'.'.Η

DIPL.-iKü. ilARL-Jü ^ over :. ; lvÜTl

8 Mwichea 4Ü, Leopoidsti. 2ü / iV

OSCOBAL AG Selzach / Switzerland

EQUIPMENT FOR JOINT SURGERY

The present invention relates to equipment for joint surgery with a partial joint replacement that can be used on all damaged joints and with means _g to be able to apply this partial joint replacement easily and precisely.

- ι
In joint surgery, alloprotheses are known which are intended for partial or total joint replacement. In particular, alloprotheses are known for the hip joint, knee joint, shoulder joint, and smaller ones for the elbow joints.

SE / yf / 18 862 / F. 6th

509814 / Ö243

These artificial joints are designed in the shape of a special joint and cannot be used for other joints, so that a wide variety of them are present and available .must be. Another particular disadvantage is that Sir the installation of these joints from the existing articular bone Parts have to be removed, although the damaged parts £ ea are often small

After fitting these joints, infections occur that lead to loosening of the joints or intolerance symptoms that make removal necessary, can be used for further treatment options, such as joint stiffening (arthrodesis), *? sawing the missing parts of the knee cause considerable difficulties.

It is the aim of the present invention to provide equipment . ",« 3i® it works to avoid the above parts of the problem.

This is achieved by means of a © equipment, which is characterized by a set of partial joint replacement pieces, each of which is designed as a threaded pin iaifc an eyelet surface, which is modeled in the essential part of the point to be replaced on the joint surface of the K210-ciiens xmd type of its edge has grooves

a twist drill ar sskvc drilling jig _t a ge »-? inäas? one that can be linked to the conductors. Sfcsdk key «.

509814 / 0-243

The partial joint replacement allows a later replacement for a total joint replacement, or the implementation of an arthrodesis. An example of equipment according to the invention will now be described in more detail below with reference to a drawing, wherein

Fig. 1 shows a form of a partial joint replacement and

Fig. 2 shows another form of a spare part,

Fig. 3 a built-in partial joint replacement,

Fig. 4 shows another built-in part

Fig. 5 with a partial articulated device in plan view

Pig. 6 noble keys for screwing in the parts,

Fig. 7 shows the pre-drilling of the core holes for the fastening

supply thread,

Fig. 8 the pre-cutting of the thread isi bone,

Fig. 9 milling a s in the joint surface for spare parts.

The partial gel kit 1, hereinafter referred to as part 1, has a thread 2 which, depending on the type of part 1, extends as far as the joint surface 3 or as far as the head 4. The part 1 can now, depending on the intended use, no head Fig. 1 or one with a flat 5 concave 6 or convex 7 gel surface {Fig. 2) have. All spare parts have at least two, advantageously four, hats 8 at the top of the circumference {Fig. 5) which serve on the one hand to screw the parts into the bone 9 with a socket wrench IO (Fig. 6), the key according to the number of grooves at least

509814/0243

*> ti

has two, advantageously four cams 11.

On the other hand, the bone forms after the insertion of the partial joint also in these grooves 8 and thus prevents loosening of part 1.

f
Depending on the intended use, the Teil® are made of a suitable material, for example from a chrome-cobalt alloy or from high-molecular-weight polyethylene and are provided with the final joint surface, for example between 3-7, and polished if necessary.

In another embodiment, the parts 1 are made of silicone rubber, the joint surfaces widening excessively. After turning, the joint surface is reworked to match the original joint surface.

- Since “inserting the parts 1 generally requires a relative minor surgical intervention. For this purpose, the spare parts include standard equipment that allows them to be brought in optimally allows these parts in the bones. First, according to FIG. 7, the core hole 12 with a twist drill 13, which is from a drilling jig 14 is driven into the defective joint parts. Then it will be, (Fig. 8} pre-cut the thread with the thread cutter 15, whereupon the part 1 with the help of the socket wrench 10 is inserted.

509814/0243

can be rotated. Thereby these spare parts are without additional Bone cement introduced in order to enable a possible replacement or removal without great surgical effort. It is It is essential that the part is secured by the bone growing into the grooves. If the part was intended for this, can it can now be reworked in order to adapt the joint surface.

t *

If it is necessary to replace the part for a reason, you can, as mentioned, unscrew it and screw in a spare part. But it is also especially when a part is needed with a larger joint surface, drilling, in the joint surface zn replaced with a milling cutter 16th (FIG _o 9) a hole, screw threads and screw in a new part "

It is clear from the examples described that only a few standard parts are required to replace the damaged joint sites, which require a limited set of instruments. A very important advantage is also expressed in that with the help of these spare parts, intervention is essentially only carried out in a targeted manner where the joint is damaged and not entire joints have to be severed or halves of the joint need to be removed. It is also understood that the parts one does not have to be limited to the standard types _e it is possible many variants within the scope of this invention, the shape-especially concerning their heads. The materials used were especially

509814/0243

called, but there may be others in question the special problems are even better adapted.

§03814 / 0.243

Claims (1)

Iy equipment for joint surgery, characterized by a set of partial joint replacement pieces Cl) * wovoa each is designed as a threaded pin with a joint. sweet is borrowed from the place where it was replaced, which is modeled on the bone, and on its esade Moten (B) aiaf shows and diarch. a twist drill {13} sasat Boferlefere (14), iron thread cutter C15) and © inen with the nuts CS) Koppeibareii socket wrench According to claim I ₁ characterized in that the partial joint replacement parts consist of a small number of standard parts. 3. Equipment has gsmäss claim 1, characterized in that the _r gekeimzeichnet Te £ l-Sel © iikersats CD thread {2}, which extends to the Salenkflache (3). 4 _t Äiisrlistimg components manufactured in compliance I claim ^ characterized in that the übbs ilfeiil-Gelenkersats a head (4) aufweist- 5 _e equipment according to claim 1, characterized in that the Te'.il joint replacement from an Ehrom-Kobalfc-Lagierung or from einin 5098U / 0243 It is made of high molecular weight polyethylene and its articular surface is finished before screwing in. Equipment according to claim 1, characterized in that the partial joint replacement consists of a silicone rubber and excessively large, so that after screwing in, the final To be able to preserve articular surface. 7. Equipment according to claim 1, characterized in that the partial joint replacement has at least two grooves (8). 3} equipment according to claim 1, characterized in that the partial joint replacement has four grooves (8). 9) equipment according to claim 1, characterized in that the socket wrench (10) has four cams (11) which can be coupled to the grooves (8). ; 10) equipment according to claim 5, characterized in that the articular surface is flat (5). 11) Equipment according to claim 5, characterized in that the joint surface is concave (6). 12) equipment according to claim 5, characterized in that f. the articular surface is convex (7). 509814/0243 Blank page