DE102005048484A1 - Device for handling an artificial hip socket - Google Patents

Abstract

In a device for handling an artificial hip socket (2) with a striking device (3), the striking device (3) should be assigned a tensioning element (4).

Description

The The present invention relates to a handling device an artificial one acetabulum with a beater.

Such devices are already known in many forms and configurations and in use. For example, in the DE 692 18 097 T2 a device for inserting a acetabulum prosthesis is described in which the pan is mounted on an insert instrument having a pressure application device and a pan holder which can be moved relative to the pressure application between a front position in which he can take and hold a hip socket and a rear position can, in which he is no longer engaged with the pan. At the same time pressure is applied to the pan by the pressure applying means, so that the risk of displacement or misalignment of the pan is reduced.

adversely However, this is that this device has a complicated structure and has a complicated handling. On top of that, parts of the device in use sticking out the edge of the acetabulum, what cause it can that at the place of use of the artificial acetabulum and the device in the Bone more bone material must be milled out to allow the device has enough space.

Of Another is disadvantageous in this and other device that they are difficult to clean or a disassembly of the device for example Cleaning is not possible without further tools.

task Therefore, it is the object of the present invention to provide the above mentioned o. Disadvantages too eliminate and create a simple and easy-to-use Device to create, with which the handling of the acetabulum and their insertion into the bone is simplified. At the same time in the Area of use of the device and the artificial acetabulum as little bone material as possible milled Need to become, the device still has enough space to handle the acetabulum should have.

Further a device is to be created, the few components for example, to clean easily and without the help of additional Tools can be disassembled and reassembled.

Also should be a resumption of artificial acetabulum to expose this from the body easily possible be.

SOLUTION OF THE TASK

to solution the task leads in that the impact device is assigned a tensioning element.

The Clamping element preferably has approximately the shape of an isosceles Triangle, whose three tips as rounded and bent down Wall segments are formed. Aroused by this embodiment the clamping element, seen from the side, the impression of a Gripping element.

On inner surfaces the downwardly curved wall segments transverse pins are arranged. The transverse pins have a radius to a center of a approximately centrally disposed in the clamping element bore, which smaller than the radius of the wall segments to the center of the bore is.

Of Furthermore, the clamping element has at least one lower side, However, preferably three detent balls, which with locking grooves on a Top of a profile plate of the impact device in operative connection reach.

On a top of the clamping element is arranged a handle, which also approximately in the shape of an isosceles triangle but here are the sides of the isosceles triangle concave arched inwards are. As a result, the handling of the handle is facilitated.

About the central bore, the clamping element on a shaft of the beater put on until the wall segments rest on the profile plate. Upon rotation of the clamping element, the wall segments slide in arc segments of the profile plate, which has a smaller radius to have a center of the profile plate and which smaller is than the radius of the wall segments to the center of the clamping element, further down.

One further rotation of the tensioning element causes the detent balls on the underside of the clamping element with the locking grooves on the Engage the top of the profile plate in engagement. At the same time the cross pins in an arc segment with a medium radius to the center of the profile plate, the profile plate, whereby the profile plate sandwiched between the transverse pins and the underside of the clamping element is.

One further rotation of the clamping element in a clockwise direction is not more is possible, da sides of the wall segments of arc segments of the profile plate with the largest Radius to rest on the center of the profile plate. Hereby are the impactor and the tensioning element, at least temporarily, connected to each other.

The Striking device and the clamping element can now as a whole, or too one after the other, put on one edge of the acetabular cup, wherein a centering on the underside of the profile plate inserting facilitates the device in or on the acetabulum. To the placement of the beater and the clamping element on the acetabulum snap pins on the underside of the profile plate in pin holes an outer circumference of a ring, which the edge of the acetabulum is arranged.

To this time, there are the transverse pins of the clamping element again in the arc segment with the smallest radius, so that the Tension element to be rotated again in the clockwise direction must, so that the transverse pins in locking guides on the outer circumference of the wreath and the locking balls on the underside of the clamping element can engage in the locking grooves on the top of the profile plate. In order to the entire device is braced on the acetabular cup. The acetabular cup can now be inserted into the bone and press-fit.

Around To prevent too much bone from being milled out of the bone must close, both the impact device and the clamping lever roughly flush with the edge or the wreath of the acetabular cup. That is, a radius between the edge and a midpoint of the acetabular cup is greater or equal to the largest Radius between the arc segments of the profile plate and its center or the radius between the wall segments and the center of the tension lock. Likewise, there is a radius between the outer circumference of the rim and the center of the acetabulum equal to the mean radius between the arc segments of the profile plate and its center or greater as the radius between the cross pins and the center of the Clamping element.

The Embodiment of the clamping element and the impact device is at of the present invention has been selected so that each three Cross pins with three locking guides the hip socket, three detent balls of the clamping element with three locking grooves of the profile plate and three pins of the profile plate with three pin holes of the acetabulum engage. However, it is also conceivable, the respective Number of elements between one, two and more than three vary allow. It is important that between the cocking lever, the beater and the acetabulum each creates a secure locking connection.

Farther is conceivable, the shape and the design of the individual elements to vary. Thus, the pin holes in the present embodiment as a semicircular Holes designed on the outer circumference of the wreath the acetabulum are arranged. However, it is also conceivable that the holes as full circle holes Completely to arrange in the wreath. Correspondingly, the pins would have to be on the bottom the profile plate of the beater a little further in the direction the center of the profile plate to be put into this To enter holes. something similar is for the other elements conceivable. The different possibilities the form and the design of the individual elements should be of the to be included in the present invention.

Corresponding However, the design of the respective number of elements can also be the embodiment change the clamping element and the impact device. So, for example the clamping element have an oval shape, if only two Cross pins are provided on two wall segments. Accordingly, also change the design of the handle. It can be round, angular, oval od. Like. Be.

The Profile plate, for example, which in the present embodiment with different arc segments with different radii can be configured, another distribution of arc segments exhibit. In the present case, the profile plate was designed in such a way that they have three different arc segments each with a different one Radius has its center, wherein the arc segment with the least radius between two arc segments of medium radius, the arc segment with the middle radius in turn between the Arc segment with the smallest radius and an arc segment with the largest Radius and an arc segment with the largest radius turn between two arc segments with the middle radius is arranged. Consequently are in the present profile plate three arc segments with larger radius, three arc segments with a smaller radius and six arc segments with provided medium radius. This arrangement and the number of Arc segments, however, can be changed as desired. Important is also here only that possibility the tension of the clamping element on the profile plate, as above described, is given.

It is also conceivable, instead of Rastnuten and locking balls and the connection of transverse pins and locking guides other locking devices provide a secure latching connection between the clamping element, Striking device and hip socket provide.

The different possibilities the change the shape as well as the number of different elements which for one secure latching connection are required, are intended by the present Invention includes.

With the present device has been created the possibility a simple and safe way to insert an artificial hip socket into the body, without that extra Milled out bone material must become. At the same time, the disassembly of the device is on simple way possible, thereby For example, the cleaning of the device is easily possible.

FIGURENBESCHREIBEUNG

Further Advantages, features and details of the present invention result from the following description of preferred embodiments as well as from the drawing; this shows in

1 an exploded perspective view of an apparatus for the operation of an artificial hip socket according to the present invention;

2 a side view of a beating device of the device for handling an artificial acetabulum in 1 ;

3 a plan view of the beating device in 2 ;

4 a view from below of the beater in 2 ;

5 a view from below of a clamping element of the device for handling an artificial acetabulum in 1 ;

6 a plan view of the clamping element in 5 ;

7 a section through the clamping element in 6 along the line VII-VII;

8th a side view of the acetabulum for use in the device according to the present invention;

9 a top view of the acetabulum in 8th ;

10 a partially broken away side view of the device in 1 ; and

11 a partially broken away side view of another embodiment of the device according to the present invention.

According to 1 has a device 1 for inserting a hip socket 2 a beating device 3 and a tensioning element 4 on.

The beating device 3 , which also in the 2 to 4 is shown, has a profile plate 5 on, which with different arc segments 34 . 35 . 36 is provided. The bow segments 34 . 35 . 36 in each case have a different radius r ₁ , r ₂ , r ₃ to a center M _{1 of} the profile plate 5 on. This is how the bow segment points 34 the smallest radius r ₁ to the center M ₁ , the arc segment 35 the mean radius r ₂ to the center M ₁ and the arc segment 36 the largest radius r ₃ to the center M ₁ on. Due to this, the profile plate receives 5 a step-like appearance.

On its underside (see 4 ) has the profile plate 5 a centering aid 6 on, which preferably integrally with the profile plate 5 connected is. The centering aid 6 has the shape of a folded on two opposite sides circle, which is the placement of the device 1 on the acetabulum 2 facilitated.

The profile plate 5 It is roughly in the middle of a shaft 7 interspersed, its one end 8th for receiving a baton not shown in detail.

The profile plate 5 further points on its underside 10 in the area of arc segments 36 at least one, but preferably three pins 9 on, and is also on top 11 with three evenly distributed locking grooves 12 Mistake.

The tensioning element 4 , which also in the 5 to 7 is shown, has approximately the shape of an isosceles triangle whose tips 13 but flattened and bent down as wall segments 32 are formed. On insides 14 these wall segments 32 are transverse pins 15 arranged. The wall segments 32 are preferably in a radius r ₄ around a center M _{2 of} the clamping element 4 arranged, whereas the free ends of the transverse pins 15 are arranged in a radius r ₅ about the center M ₂ . The radius r ₄ is greater than the radius r ₅ .

Furthermore, a bore runs 16 approximately in the middle by the clamping element 4 , through which in the position of use of the shaft 7 the beater 3 runs.

On a bottom 17 of the clamping element 4 is around the hole 16 a recess 18 provided, which in the position of use of receiving a in 11 shown spring 19 can serve. Furthermore, in the area of wall segments 32 on the bottom 17 of the clamping element 4 at least one, but preferably three detent balls 20 arranged.

On a top 21 of the clamping element 4 is a handle 22 which also takes the form of an approximately isosceles triangle, with the respective sides 33 of the triangle concave inwards to handle the handle 22 to facilitate.

According to the 8th and 9 is a hip socket 2 shown, which has the shape of a half-shell. On a border 23 the acetabulum 2 is a wreath 24 arranged, with the edge 23 in a radius r ₆ about a center M _{3 of} the acetabular cup 2 runs and is therefore larger than a radius r ₇ , with which the wreath 24 runs around the center M ₃ .

On an outer circumference 25 of the wreath 24 On the one hand, at least one, but preferably three pin holes 26 for holding the pins 9 the profile plate 5 and at least one, but preferably three edge guides 27 for receiving the transverse pins 15 of the clamping element 4 arranged. The pin holes 26 In the present case, they are preferably semicircular. However, it is quite possible to provide full circle holes, which in the wreath 24 are arranged so that their opening on the top of the wreath 24 to be seen.

The operation of the present invention is as follows:
First, the impact device 3 or the profile plate 5 on the edge 23 the acetabulum 2 placed. The centering aid serves this purpose 6 on the bottom 10 the profile plate 5 , The beating device 3 has her right position on the edge 23 the acetabulum 2 taken when the pins 9 the profile plate 5 the beater 3 with the provided pin holes 26 on the outer circumference 25 of the wreath 24 the acetabulum 2 engage.

Subsequently, the clamping element 4 on the shaft 7 the beater 3 put on and turned clockwise until the cross pins 15 on the insides 14 the wall segments 32 of the clamping element 4 in the area of the arc segment 34 the profile plate 5 reach. At this point, the tension element falls 4 on the shaft 7 further down, since the radius r _{5 of} the transverse pins 15 is greater than the radius r _{1 of} the arc segment 34 around the center M ₁ or M ₂ .

In a further rotation of the clamping element 4 get the cross pins 15 in the rest guides 27 on the outer circumference 25 of the wreath 24 , One more turn of the clamping element 4 leaves the cross pins 15 in curvatures 29 the detent guides 27 engage. This is the beating device 3 over the locking mechanism 4 with the acetabulum 2 locked in the manner of a bayonet lock.

At the same time enter the locking balls 20 on the bottom 17 of the clamping element 4 with the Rastnuten 12 on the top 11 the profile plate 5 engaged.

To release the lock, the clamping element must 4 be rotated in the opposite direction, with a certain amount of force is to spend the transverse pins 15 of the clamping element 4 from their engagement with the bends 29 the detent guides 27 bring to.

Another mode of operation of the present invention is as follows:
First, the clamping element 4 on the beater 3 put on and turned until it again in the area of the arc segment 34 the profile plate 5 reached and on the shaft 7 the beater 3 continues to slide down. Subsequently, the clamping element 4 either continue to turn clockwise or counterclockwise so that the cross pins 15 below the arch segment 35 to come to rest, causing the profile plate 5 between the cross pins 15 and the bottom 17 of the clamping element 4 is trapped, since the radius r _{2 of} the arc segment 35 greater than the radius r _{5 of} the transverse pins 15 around the center M ₁ or M ₂ . Subsequently, the device as a whole on the edge 23 or the wreath 24 the acetabulum 2 put on, where also the centering aid 6 determining the correct position of the device 1 on the edge 23 the acetabulum 2 serves.

Now, however, first the clamping element 4 depending on which arcuate segment region it is in, are rotated in the opposite direction to that mentioned above, again in the region of the arc segment 34 to get there, otherwise the cross pins 15 on the wreath 24 the acetabulum 2 rest. Only when the clamping element 4 the bow segment 34 has reached the beating device 3 and the tensioning element 4 on the wreath 24 come to rest.

Subsequently, the above-described operations are repeated until the transverse pins 15 in the bends 29 the detent guides 27 on the outer circumference 25 of the wreath 24 engage and at the same time the locking balls 20 on the bottom 17 of the clamping element 4 in the Rastnuten 12 on the top 11 the profile plate 5 engage.

According to 10 is an embodiment of the device 1 of the present invention, in which the detent balls 20 on the bottom 17 of the clamping element 4 with a spring 30 inside the tensioning element 4 are connected. The feather 30 serves to build up a bias of the clamping element 4 against the beater 3 ,

According to 11 is another embodiment of the device 1 of the present invention, in which instead of the locking balls 20 a central spring 19 is provided, which also the construction of a bias voltage of the clamping element 4 against the beater 3 serves. The central spring 19 is in the recess 18 around the hole 16 on the bottom 17 of the clamping element 4 recorded and supported in the use position against the top 11 the profile plate 5 from.

LIST OF REFERENCE NUMBERS

Claims (34)

Device for handling an artificial hip socket ( 2 ) with a beater ( 3 ), characterized in that the impact device ( 3 ) a tensioning element ( 4 ) assigned. Apparatus according to claim 1, characterized in that between the beating device ( 3 ) and the clamping element ( 4 ) A bias is buildable. Apparatus according to claim 2, characterized in that the bias voltage via at least one detent ball ( 20 ) of the clamping element ( 4 ) can be built, which with at least one locking groove ( 12 ) of the impact device ( 3 ) is in operative connection. Apparatus according to claim 2, characterized in that the bias voltage via a spring ( 19 ) which can be built in a recess ( 18 ) around a hole ( 16 ) of the tensioning element ( 4 ) is recorded. Apparatus according to claim 4, characterized in that the clamping element ( 4 ) the approximately center hole ( 16 ) for receiving a shaft ( 7 ) of the impact device ( 4 ) having. Device according to at least one of claims 1 to 5, characterized in that the clamping element ( 4 ) has the shape of an approximately isosceles triangle whose tips ( 13 ) as rounded and downwardly deflected wall segments ( 32 ) are formed. Device according to claim 6, characterized in that the wall segments ( 23 ) in a radius (r ₄ ) to a center (M ₂ ) of the bore ( 16 ). Apparatus according to claim 6 or 7, characterized in that on at least one inner side ( 14 ) of the wall segments ( 32 ) a transverse pin ( 15 ) are arranged. Apparatus according to claim 8, characterized in that a free end of the transverse pin ( 15 ) in a radius (r ₅ ) to the center (M2) of the bore ( 16 ) runs. Device according to at least one of claims 4 to 9, characterized in that on a lower side ( 17 ) of the clamping element ( 4 ) around the hole ( 16 ) a recess ( 18 ) for receiving a spring ( 31 ) is provided. Device according to at least one of claims 1 to 10, characterized in that the clamping element ( 4 ) on a top side ( 21 ) a handle ( 22 ) having. Device according to claim 11, characterized in that the handle ( 22 ) has approximately the shape of an isosceles triangle, wherein the sides ( 33 ) are concave. Device according to at least one of claims 5 to 12, characterized in that the beating device ( 3 ) a profile plate ( 5 ) and the shaft ( 7 ), which the profile plate ( 5 ) interspersed approximately in the middle. Apparatus according to claim 13, characterized in that the profiled plate ( 5 ) at least three arc segments ( 34 . 35 . 36 ) with different radii (r ₁ , r ₂ , r ₃ ) to a center (M ₁ ) of the profile plate ( 5 ) having. Apparatus according to claim 14, characterized in that the arc segment ( 34 ) with the smallest radius (r ₁ ) between two arc segments ( 35 ) is arranged with medium radius (r ₂ ). Apparatus according to claim 14 or 15, characterized in that the arc segment ( 35 ) with the mean radius (r ₂ ) between the arc segment ( 34 ) with the smallest radius (r ₁ ) and the arc segment ( 36 ) is arranged with the largest radius (r ₃ ). Device according to one of claims 14 to 16, characterized in that the arc segment ( 36 ) with the largest radius (r ₃ ) between two arc segments ( 35 ) is arranged with the middle radius (r ₂ ). Device according to at least one of claims 14 to 17, characterized in that the radius (r ₄₎ is greater than the radius (r _1). Device according to at least one of claims 14 to 18, characterized in that the radius (r ₄ ) corresponds approximately to the radius (r ₂ ). Device according to at least one of claims 14 to 19, characterized in that the radius (r ₄ ) is smaller than the radius (r ₃ ). Device according to at least one of claims 14 to 20, characterized in that the radius (r ₅₎ corresponds approximately to the radius (r _1). Device according to at least one of claims 14 to 21, characterized in that the radius (r ₅ ) is smaller than the radius (r ₂ ) and the radius (r ₃ ). Device according to at least one of claims 14 to 22, characterized in that the profiled plate ( 5 ) in the region of the arc segment ( 35 ) between the transverse pins ( 15 ) and the underside ( 17 ) of the tensioning element ( 4 ) can be clamped. Device according to at least one of claims 14 to 23, characterized in that the profile plate ( 5 ) on a lower side ( 10 ) in the area ( 36 ) with at least one pen ( 9 ) is provided. Device according to claim 24, characterized in that on the underside ( 10 ) of the profile plate ( 5 ) a centering aid ( 6 ) is arranged. Device according to at least one of claims 1 to 25, characterized in that the acetabulum ( 2 ) is approximately a half-shell, on whose edge ( 23 ) a wreath ( 24 ) is arranged. Apparatus according to claim 26, characterized in that the wreath ( 24 ) on an outer circumference ( 25 ) at least one pin hole ( 26 ), which with the at least one pin ( 9 ) of the profile plate ( 5 ) of the impact device ( 3 ) is engageable. Apparatus according to claim 27, characterized in that the pin bore ( 26 ) is semicircular. Apparatus according to claim 27, characterized in that the pin bore ( 26 ) is fully circular and in the wreath ( 24 ) is arranged. Device according to at least one of claims 26 to 29, characterized in that the ring ( 24 ) on an outer circumference ( 25 ) at least one locking guide ( 27 ), which with the at least one transverse pin ( 15 ) of the tensioning element ( 4 ) is engageable. Apparatus according to claim 30, characterized in that the latching guide ( 27 ) a curvature ( 29 ), in which the at least one transverse pin ( 15 ) engages. Device according to at least one of claims 26 to 31, characterized in that the edge ( 23 ) has a radius (r ₆ ) to a center point (M ₃ ) of the acetabulum ( 2 ) which is greater than a radius (r ₇ ) of the ring ( 24 ) to the midpoint (M ₃ ). Apparatus according to claim 32, characterized in that the radius (r ₆ ) is greater than or equal to the radius (r ₄ , r ₃ ). Device according to claim 32 or 33, characterized in that the radius (r ₇ ) corresponds to the radius (r ₂ ) and is greater than the radius (r ₁ , r ₅ ).