WO2016144273A1

WO2016144273A1 - Surface increasing implant for wire retainers

Info

Publication number: WO2016144273A1
Application number: PCT/TR2015/000095
Authority: WO
Inventors: Emre KARADENİZ
Original assignee: Individual
Current assignee: Individual
Priority date: 2015-03-10
Filing date: 2015-03-10
Publication date: 2016-09-15
Anticipated expiration: 2017-09-10

Abstract

The Invention is related to an orthopedic implant such as a washer, which Increases the contact area of a wire retainer with the bone surface during the processes of pushing the wire retainers, which fix the Kirschner wire used for fastening and treating fractured bones by being passed through the bone, until the bone surface; locating said retainers onto the bone surface, and stretching the Kirschner wire, in the field of orthopedic surgery.

Description

DESCRIPTION

SURFACE INCREASING IMPLANT FOR WIRE RETAINERS

TECHNICAL FIELD

S

The invention is related to an orthopedic Implant which increases the contact area on the bone surface for wire retainers that fasten the Klrschner wire used for fastening and treating fractured bones by being passed through the bone in the field of orthopedic surgery.

10 STATE OF THE ART

Techniques developed for surgical treatment of fractures so far are Klrschner wire (K-wire), screw, plate-screw, intramedullary nail and external fastening. The purpose of such techniques is to hold the fractured bone pieces in the desired position until fracture healing. Ϊ 5 The advantages and disadvantages of these techniques vary according to the type of fracture and they shape the treatment plan of the surgeon.

Among these techniques, in the technique of fastening with k-wire, after setting (reducing) the broken bones, these straight wires are made to pass between the bone pieces, whereby 0 the broken bones are fastened. After reduction, fractured bone pieces may move back and forth through the wire since the wires cannot provide compression between fractured bone pieces, In addition, these wires may also move after being placed into the body.

In fastening the broken bones with screw, the fractured bone pieces are placed into their 5 original places first. Compression between the pieces is obtained according to the principle of forming mutual force between the screw head and the screw threads, which is the working principle of screw, in this technique, it is required to increase the dimensions of the screw in order to increase the attachment and compression force between the pieces. However, if the bone pieces are small in size, the dimension of the screw cannot be increased. Due to the 30 screw dimension, there may be no space left to locate an additional screw between the pieces. Moreover, as a surgical technique, first the bone is drilled with a drill, and then grooves are opened for screw threads (tapping), subsequent to which the screw is located Additionally, prior to these processes, sometimes k-wire is needed to be placed to guide the screw. As a result, the surgical technique is relatively difficult. Moreover, the attachment 35 intended to be provided by screw threads is not practical for patients with osteoporosis On the other hand, in fastening the fractured bones with p!ate screw, fractured bone pieces are secured to their locations by plates held by screws, subsequent to reduction. However, since the plates are held by screws, ail of the disadvantages of screw technique are also experienced herein. The process of placing plates requires abrading more tissue surrounding the bone. This, in turn, means more incision and more nutrition problem for the bone pieces. The plate may prevent the heaiing of skin where the under skin tissue is very thin and may be felt by hand. When the bone pieces are too small or too close to the joints, it becomes impossible to place the plates. Furthermore, when the plates are to be taken out, the surrounding tissues are damaged again.

As a eons*qusnee, due to the aforementioned disadvantages and in© insufficie c of the existing solutions regarding the subject matter, the product with the Application No. 2010/05862 titled "A wire retainer" has been developed, as distinct from the known methods. The surface increasing implant according to the present application has been developed for using the "wire retainer" more efficiently in the process of fastening broken bones.

OBJECTS OF THE INVENTION

The main object of the invention is to provide an apparatus in order to prevent the "wire retainers", subject matter of an examined patent, from impaction into the bone by being fitted in a larger surface on the bone tissue.

The object of the invention is to heal the fractured bones by gi ing minimum harm to the bones and the surrounding soft tissues by way of using the wire retainers with percutaneous techniques.

An object of the invention is to allow for fastening after reducing by means of thin wires by providing compression at the fracture line, and thus to make it possible to compress tiny fractured bone pieces.

An object of the invention is to permit the use of thin k-wires for both compression and support purposes by the virtue of "A wire retainer".

Another object of the invention is to eliminate the important problem of "penetrating of small parts" in fractures in the vicinity of the joints, e.g. knees, by allowing the use thereof for treatment. Thick grooves are opened on the bone pieces so as to place the screw. An object of the invention is to minimize the problem of formation of new fractures due to these thick grooves by the usage of k-wires, which are much thinner than these grooves. Another object of the invention is to allow for providing compression over the wire by using the same along with "A wire retainer" according to the Application No. 2010/05662 in cases where the bone anatomy does not allow the usage of thick fastening elements, as in the case of fractures around the elbow. Yet another object of the invention is to perform the surgery without requiring such processes as tapping and drilling.

And another object of the invention is to provide a larger bearing surface for wire retainers in order to prevent the "wire retainers" placed on the bone tissue from impaction into the bone by crushing the bone surface onto which they are fitted, during compression of the parts.

The structural and distinctive characteristics and ail advantages of the invention will be better- understood with the figures below and the detailed description written by referring to these figures; therefore, the invention should be evaluated by taking these figures and the detailed explanations into account.

FIGURES FOR A BETTER UNDERSTANDING OF THE INVENTION

Fig. 1 is the overall view of the surface increasing apparatus according to the invention.

Fig. 2 is the overall view of the surface increasing apparatus according to the invention from another angle.

Fig. 3 shows the surface increasing apparatus according to the invention when positioned under the wire retainer for performing compression, as well as showing the working principle thereof together with the gripper,

DESCRIPTION OF THE REFERENCES

S. Squeezing Apparatus

G. Gripper

R. Retainer

W. Washer 1 . Bearing Surface

2. K-wire Hole

3. Upper Part

4. Lower Part The drawings do not necessarily need to be scaled and the details that are not required for understanding the present invention may have been ignored. Apart from that, the components that are at least substantially identical or have at !east substantially identical functions are referred with the same numeral. DETAILED DESCRIPTION OF THE INVENTION in this detailed description, the preferred embodiments of the wire retainer washer (W) according to the invention are described only for a better understanding of the subject matter The applications of the working cannuia_; gripper, and the squeezing apparatus, which are mentioned in the embodiment of the present invention, have all been made by us.

Working cannula is an apparatus which

comprises a knurled tip which abrades the bone tissue of the soft tissues thereon, allows advancing without cutting the surrounding tissues, is formed in compliance with the diameter of the wire retainer (R), and has protrusions and recesses

and constitutes a working corridor for various surgical apparatuses.

The squeezing apparatus is a component which comprises a formed tip which is seated in the grooves in the upper part (3) of the retainer (R) by passing therethrough; and which tightens-locks or loosens-removes the retainer (R) on the bone surface by rotating the screw system of the retainer (R).

The gripper is a component which comprises a formed tip which prevents the release of the retainer (R) by passing through the working cannula and which is formed in accordance with the shape of the retainer (R) in order to fully contact with the wire retainer (R).

The present invention is used together with "A wire retainer" according to the Application No. 2010/05662, which has been granted an examined patent certificate by Turkish Patent Institute and which is used for fastening the broken bones. The surface increasing implant (i.e. washer (W)} generally consists of the following in order to be used for pushing the retainer (R) until the bone along the working corridor formed by the working cannula by means of a gripper (G), and for use prior to compression by means of the squeezing apparatus (S) in a way to perform positioning properly; - a k-wire hole {2} through which the k-wire is passed and which allows the washer (VV) to be advanced until the bone over the k-wire, and

- a bearing surface (1) onto which the retainer (R) is fitted,

Since the dimensions of "A wire retainer" are equal to the size of screw heads, the retainer (R) occupies less space compared to the plates located onto the broken bones and the problem of feeling the retainer (R) under the skin with hand is less experienced. Because the compression force provided by threads in screws requires attachment to the bone marrow; the usage thereof causes difficulties in patients with low bone quality. However, as "A wire retainer" provides attachment over the bone cortex, it provides very important advantages in terms of use in patients with low bone quality, e.g. patients with osteoporosis. Since cortical attachment is provided by "A wire retainer", the problem of dislocation of retainers (R) is eliminated.

The wire retainer washer (W) has been developed for increasing the seating, i.e. bearing, area on the bone surface before the retainer (R) according to the application titled "A wire retainer" is located onto the desired location on the bone properly (Fig. 3).

In an alternative embodiment of the invention;

The k-wire hole (2) may be thinner, thicker, or eccentrically located, depending on the thickness of the k-wire to be used. The bearing surface (1) according to the invention may have a shape other than circle (e.g. hexagonal, rectangle) and a different thickness.

Claims

A surface increasing implant which is placed between the bone surface and the wire retainer (R) before the retainers (R), which are used for fastening and treating the fractured bones, are located on the bone surface by being advanced over the k-wire, said surface increasing implant characterized in comprising;

- a k-wire hole (2) which allows the implant to advance until the bone surface by following the k-wire; and

- a bearing surface (1) which increases the contact area of the retainer (R) with the bone surface on the bone tissue in order to prevent said retainers (R) from impaction into the bone by crushing the bone surface.

The surface increasing implant according to Claim 1 , characterized in that it is a washer (W).