DE102014104707A1 - implant system - Google Patents

Abstract

In order to improve an implant system, in particular a hip joint implant system, comprising at least one proboscis head with a spherical or substantially spherical joint surface so that it can be handled more easily, it is proposed that the at least one proboscis head have at least one release recess, which is arranged or formed in the region of the joint surface.

Description

The present invention relates to an implant system, in particular a hip joint implant system, comprising at least one proboscis head with a spherical or substantially spherical joint surface which can be connected in a clamping manner to a rasp shaft or a prosthesis shaft.

When inserting implants, in particular hip joint implants, into a human or animal body, for example for replacing a damaged joint, in particular a damaged hip joint, it is quite common to first prepare a bone cavity with a rasp for insertion of the prosthesis shaft to be implanted. In order to determine the final position and the size of the implant to be used, a probing head is first clamped to a rasp shaft or, after inserting the final prosthesis shaft, a clamping head. For this purpose, in particular, a projection on the rasp shaft or on the prosthesis shaft can be brought into engagement with a recess on the sample articulation head.

A problem with the use of probeheads in the manner described is that, in particular in the case of a conical connection, the probing head clamps so tightly on the rasp or prosthesis shaft that it can not easily be removed by hand.

It is therefore an object of the present invention to improve an implant system of the type described above so that it is easier to handle.

This object is achieved according to the invention in an implant system of the type described above, in that the at least one proboscaling head has at least one release recess, which is arranged or formed in the region of the joint surface.

Depending on the configuration of the release recess, this enables a surgeon to grasp the proboscis head by hand, for example, or to bring it into engagement with an instrument in order to rotate the proboscis head relative to the rasp or prosthesis shaft. By a simple twisting, the probing head on the rasp or prosthesis shaft can be released in a simple and reliable manner, in particular even with a cone connection. The provision of the at least one release recess in the region of the articular surface additionally makes it possible to successfully carry out the described rotational movement even with soiled, slippery gloves and with very small test heads.

In order to be able to grasp the sample cone head particularly well, it is advantageous if it has two, three, four or more release recesses. For example, the proboscis head can be grasped securely with two, three, four or five fingers, without them being able to slip off the trial articulation head when turning it off the rasp or prosthesis shaft.

The handling and manufacture of the implant system can be further improved if the two or more release recesses are uniformly distributed over a circumference of the at least one proboscalender head. For example, they may be evenly distributed over a circumference with respect to a longitudinal axis defined by the sample articulating head.

Preferably, the at least one release recess defines a release recess longitudinal axis. In particular, this can run parallel to a longitudinal axis defined by the at least one probing head. On the one hand, this simplifies the production of the sample articulation head, and on the other hand, such a surgeon can recognize directly on the orientation and orientation of the release recesses how the longitudinal axis of the sample articulation head is oriented. So he can solve the probing head particularly sensitive of the rasp or prosthesis shaft, without exerting too much force, in particular on an already implanted prosthesis shaft.

In order to connect the sample-adjusting head to a rasp or prosthesis shaft, it is advantageous if the at least one probing-head has a connecting recess which is open in the distal direction for clampingly connecting with a corresponding connecting projection on a rasp or prosthesis shaft. Thus, the trial and countersunk head, as well as the actual implant articulation head also, can be placed in a simple manner on the rasp or prosthesis socket. In particular, the connecting projection is designed in the form of a cone-shaped connecting pin.

Conveniently, the connection tapering towards the articular surface tapers conically. In other words, the connection is expanding in the opposite direction. In particular, a conical connection between the sample-locking head and the rasp or prosthesis shaft can be formed. Depending on the inclination of the conical surface, in particular, a self-locking connection between the sample articulating head and the rasp or prosthesis shaft can thus be produced.

In particular, for cleaning purposes, it is advantageous if the at least one probing head has an opening, which has a Fluid connection between the articular surface and the connection receiving forms. Thus, a cleaning liquid when cleaning the Probenegelenkkopfs and reprocessing, especially when sterilizing, safely flow out of the connection recording.

The opening can be produced in a particularly simple manner if it is designed in the form of a bore.

The at least one release recess can be grasped particularly well or be brought into engagement with a tool if it has a release recess surface facing away from the at least one sample pivoting head.

Conveniently, the Löseausnehmungsfläche of the at least one probing elbow is facing away concavely curved. Thus, in particular, a release recess can be formed, which forms a depression in the articular surface. The probing head can thus be held securely especially with soiled, slippery gloves. Alternatively, the Lösungsausnehmungsfläche can also be flat.

The release recess surface can be produced in a particularly simple manner if it is designed in the form of a hollow-cylindrical surface section. For example, it can be formed by milling.

The design and manufacture of the sample-adjusting head can be further simplified if the at least one release recess is formed symmetrically with respect to a plane of symmetry containing a longitudinal axis defined by the at least one probing-joint head. By way of example, a curvature of the concave release recess surface may also correspond or substantially correspond to a curvature of the preferably convex hinge surface of the at least one proboscalender head, but may also be larger or smaller than it.

In a particularly simple manner, the at least one sample articulation head can be released from the rasp or prosthesis shaft if the at least one release recess is designed in the form of a recessed grip and / or in the form of a tool element receptacle. This means, in particular, that the at least one sample articulated head can have at least one recessed grip and / or at least one tool element receptacle. Of course, the sample joint head can also have a plurality of recessed grips and / or tool element receptacles. Furthermore, a tool element receptacle can also be arranged or formed in the region of a recessed grip. This has the advantage, in particular, if it is not possible to disengage the sample articulation head by hand, in particular if the sample articulation head clamps too tightly on the rasp or prosthesis shaft, so that a larger tool can be optionally used with a tool which can be brought into engagement with the at least one tool element receptacle Release forces can be exerted to facilitate the release of the at least one probing head from the rasp or prosthesis stem. In particular, the tool element receptacle can be arranged or formed symmetrically relative to the recessed grip. Optionally, a plurality of recessed grips and tool element receptacles are arranged offset, for example, evenly distributed over a circumference of the probing head.

It is expedient if the tool element receptacle is open in a direction away from the at least one proboscaling head with respect to a longitudinal axis defined by the at least one proboscaling head. Thus, a tool can be brought into engagement with the tool element holder in a simple and secure manner, in order in particular to be able to exert a torque on the at least one sample articulated head in a simple manner for releasing it from the rasp or prosthesis shaft.

It is advantageous if the tool element receptacle defined with respect to the recessed grip a return. This allows a surgeon to try, in particular first, to release the sample cone head by hand by turning the rasp or prosthesis stem. If this does not succeed, can be turned off the rasp or prosthesis shaft in addition by using a tool that can be brought into engagement with the at least one tool element receiving the probing.

In a particularly simple manner, the sample joint head can be formed when the tool element receptacle has two parallel or substantially mutually parallel inner surfaces. Thus, the tool element holder can be produced, for example in the form of a groove by milling. The inner surfaces can in particular face each other. A further inner connecting surface which connects the two inner surfaces extending parallel to one another may, in particular, be concavely curved and define a hollow-cylindrical inner surface. Optionally, the inner surfaces can also extend transversely, in particular perpendicular, to the longitudinal axis.

Torques for releasing the at least one probing articulation head from the rasp or prosthesis shaft can be exercised particularly efficiently if the inner surfaces extend parallel to the longitudinal axis of the at least one probing articulation head. Alternatively or optionally, the inner surfaces may also extend transversely, in particular perpendicular to the longitudinal axis. For example, a rotation of the probing head could be realized laterally around its circumference with a corresponding tool having projections, in particular protruding pins, which engage in corresponding recesses, for example, transverse to the longitudinal axis oriented holes on Probegelenkkopf.

In order to enable a simple and secure connection of a tool with the at least one probing head, it is advantageous if the tool element receptacle defines a stop acting in the proximal direction. Thus, it can be prevented that the tool can slip off in the distal direction from the at least one proboscis head.

The stop can be formed in a simple manner if it comprises a stop surface pointing in the proximal direction. For example, a distal end or a distal end surface of the tool may abut against the stop surface and prevent movement of the tool distally relative to the sample gudgeon head.

Conveniently, the stop surface extends transversely, in particular perpendicular, to the inner surfaces. Thus, a defined stop can be specified in a simple and secure manner. The stop surface can optionally also be formed inclined slightly downwards. This allows a better drainage of cleaning fluid, especially water, when cleaning.

Furthermore, it may be advantageous if each recessed grip is associated with a tool element receptacle. In particular, the tool element receptacle can be arranged or formed symmetrically relative to the recessed grip. Furthermore, it is possible to always find a suitable tool element holder for a tool, regardless of an orientation of the probing head in a simple and secure way. Optionally, an assignment can also be made such that recessed grips and tool element receptacles are arranged offset, for example, distributed uniformly over a circumference of the probing head.

In order to ensure sufficient stability of the probing head, it is advantageous if a mean length of the tool element receptacle corresponds approximately to half the average length of the recessed grip.

The implant system can be produced in a particularly simple manner if the at least one sample articulating head is formed from a plastic. Preferably, this is a sterilizable plastic. In particular, different sizes of Probegelenkenköpfen may be characterized by different colors. For example, this can be achieved simply by coloring the plastics.

In particular, for sample journals which are particularly firmly seated on rasp or prosthesis shanks, it is favorable if the implant system comprises at least one release tool with at least one release element, which release element is designed to correspond or substantially correspond to the at least one release recess on the at least one sample journalling head. With the at least one loosening tool, the at least one probing head can be easily and safely released from the rasp or prosthesis shaft, if this is not possible or desired by hand. For releasing, only the at least one release element of the release tool has to be brought into engagement with the at least one release recess of the at least one probe pivoting head.

For different sized probing heads, in particular suitably designed release tools can be provided. Furthermore, the release tools can also differ in their shape, for example in the design of their release elements and in an orientation thereof.

In a particularly simple manner, the at least one release tool can be formed if the at least one release element is designed in the form of a release projection. This can then be easily brought into engagement with a release recess, for example a release recess in the form of a tool recess.

According to a further preferred embodiment of the invention can be provided that the at least one release element non-positively and / or positively engageable with the at least one release recess is engageable. In particular, the at least one release element is positively and / or positively engageable with the at least one release recess in the form of a tool recess.

Advantageously, the at least one release tool comprises two, three, four or more release elements. These can in particular be arranged and configured such that they can be brought into engagement with at least one probing head simultaneously with two, three, four or more release recesses, in particular tool recesses.

The handling of the release tool can be improved in a simple manner in particular in that the at least one release tool comprises a shaft and that the at least one release element is arranged or formed at a distal end or in a distal end region of the shaft.

It may also be advantageous if the at least one release element is aligned parallel or substantially parallel to the shaft. Thus, for example, the at least one trial articulation head can be turned off from the rasp or prosthesis stem in a simple manner by rotating the release tool about a shaft longitudinal axis defined by the stem. Substantially parallel means in particular that the at least one release element and the shaft can enclose a small angle, in particular up to about 10 °.

It is also expedient if the at least one release element defines a release element longitudinal axis, if the shaft defines a shaft longitudinal axis and if an angle enclosed between the release element longitudinal axis and the shaft axis lies in a range of approximately 90 ° to approximately 180 °. By such a bend between the release element and the shaft, it is possible to enable a coupling of the release tool with the at least one probing head even with different operational approaches. In particular, some operational accesses necessarily require a bend which does not make it possible to couple a release element extending the shaft rectilinearly with the sample joint head at all.

To improve the handling of the implant system, it is advantageous if the at least one release tool comprises a grip element which is arranged or formed on a proximal end or in a proximal end region of the shaft. For example, the grip area may be in the form of a thickening of the shaft at the proximal end thereof. Further, it is also possible to form the grip element with one or two transversely projecting from the shaft, wing-like projections, so as to be able to exert a simple torque with respect to the shaft longitudinal axis.

Particularly easy is the production of the release tool, if this is formed in one piece. For example, it may be formed by punching from a flat material.

It is advantageous if the release tool is at least partially made of a sterilizable metal. Thus, it can in particular obtain the stability required for the use of the release tool. For example, the sterilizable metal may be a flat or round steel, in particular a tool steel.

Furthermore, it is advantageous if the implant system comprises two or more sample articulation heads which have a different diameter. Thus, the desired size of the condyle to be permanently implanted can be easily determined and selected by a surgeon. Preferably, different sized probing heads have different colors or corresponding markings so that they can easily be identified by the surgeon, especially if the surgical site is contaminated by blood, tissue or other fluids.

• 1. Implantatsystem (10), insbesondere Hüftgelenkimplantatsystem (11), umfassend mindestens einen mit einem Raspelschaft oder einem Prothesenschaft klemmend verbindbaren Probegelenkkopf (12) mit einer kugeligen oder im Wesentlichen kugeligen Gelenkfläche (14), dadurch gekennzeichnet, dass der mindestens eine Probegelenkkopf (12) mindestens eine Löseausnehmung (26a, 26b) aufweist, welche im Bereich der Gelenkfläche (14) angeordnet oder ausgebildet ist.
• 2. Implantatsystem nach Satz 1, dadurch gekennzeichnet, dass der mindestens eine Probegelenkkopf (12) zwei, drei, vier oder mehr Löseausnehmungen (26a, 26b) aufweist.
• 3. Implantatsystem nach Satz 2, dadurch gekennzeichnet, dass die zwei oder mehr Löseausnehmungen (26a, 26b) gleichmäßig über einen Umfang des mindestens einen Probegelenkkopfs (12) verteilt sind.
• 4. Implantatsystem nach einem der voranstehenden Sätze, dadurch gekennzeichnet, dass die mindestens eine Löseausnehmung (26a, 26b) eine Löseausnehmungslängsachse (30) definiert, welche insbesondere parallel zu einer vom mindestens einen Probegelenkkopf (12) definierten Längsachse (22) verläuft.
• 5. Implantatsystem nach einem der voranstehenden Sätze, dadurch gekennzeichnet, dass der mindestens eine Probegelenkkopf (12) eine in distaler Richtung weisend offene Verbindungsaufnahme (18) aufweist zum klemmenden Verbinden mit einem korrespondierenden Verbindungsvorsprung an einem Raspelschaft oder einem Prothesenschaft.
• 6. Implantatsystem nach Satz 5, dadurch gekennzeichnet, dass sich die Verbindungsaufnahme (18) in Richtung auf die Gelenkfläche (14) hin konisch verjüngt.
• 7. Implantatsystem nach Satz 5 oder 6, dadurch gekennzeichnet, dass der mindestens eine Probegelenkkopf (12) eine Durchbrechung (38) aufweist, welche eine Fluidverbindung zwischen der Gelenkfläche (14) und der Verbindungsaufnahme (18) bildet.
• 8. Implantatsystem nach Satz 7, dadurch gekennzeichnet, dass die Durchbrechung (38) in Form einer Bohrung (40) ausgebildet ist.
• 9. Implantatsystem nach einem der voranstehenden Sätze, dadurch gekennzeichnet, dass die mindestens eine Löseausnehmung (26a, 26b) eine vom mindestens einen Probegelenkkopf (12) weg weisende Löseausnehmungsfläche (32) aufweist.
• 10. Implantatsystem nach Satz 9, dadurch gekennzeichnet, dass die Löseausnehmungsfläche (32) vom mindestens einen Probegelenkkopf (12) weg weisend konkav gekrümmt ist.
• 11. Implantatsystem nach Satz 9 oder 10, dadurch gekennzeichnet, dass die Löseausnehmungsfläche (32) in Form eines hohlzylindrischen Flächenabschnitts (34) ausgebildet ist.
• 12. Implantatsystem nach einem der voranstehenden Sätze, dadurch gekennzeichnet, dass die mindestens eine Löseausnehmung (26a, 26b) symmetrisch bezogen auf eine, eine vom mindestens einen Probegelenkkopf (12) definierte Längsachse (22) enthaltende Symmetrieebene (36) ausgebildet ist.
• 13. Implantatsystem nach einem der voranstehenden Sätze, dadurch gekennzeichnet, dass die mindestens eine Löseausnehmung (26a, 26b) in Form einer Griffmulde (28) und/oder in Form einer Werkzeugelementaufnahme (42) ausgebildet ist.
• 14. Implantatsystem nach Satz 13, dadurch gekennzeichnet, dass die Werkzeugelementaufnahme (42) bezogen auf eine vom mindestens einen Probegelenkkopf (12) definierte Längsachse (22) in radialer Richtung vom Probegelenkkopf (12) weg weisend geöffnet ist.
• 15. Implantatsystem nach Satz 13 oder 14, dadurch gekennzeichnet, dass die Werkzeugelementaufnahme (42) bezogen auf die Griffmulde (28) einen Rücksprung (44) definiert.
• 16. Implantatsystem nach einem der Sätze 13 bis 15, dadurch gekennzeichnet, dass die Werkzeugelementaufnahme (42) zwei parallel oder im Wesentlichen parallel zueinander verlaufende Innenflächen (46) aufweist.
• 17. Implantatsystem nach Satz 16, dadurch gekennzeichnet, dass die Innenflächen (46) parallel zur Längsachse (22) verlaufen.
• 18. Implantatsystem nach einem der Sätze 13 bis 17, dadurch gekennzeichnet, dass die Werkzeugelementaufnahme (42) einen in proximaler Richtung wirkenden Anschlag (48) definiert.
• 19. Implantatsystem nach Satz 18, dadurch gekennzeichnet, dass der Anschlag (48) eine in proximaler Richtung weisende Anschlagfläche (50) umfasst.
• 20. Implantatsystem nach Satz 20, dadurch gekennzeichnet, dass die Anschlagfläche (50) quer, insbesondere senkrecht, zu den Innenflächen (46) verläuft.
• 21. Implantatsystem nach einem der Sätze 13 bis 20, dadurch gekennzeichnet, dass jeder Griffmulde (28) eine Werkzeugelementaufnahme (42) zugeordnet ist.
• 22. Implantatsystem nach einem der Sätze 13 bis 21, dadurch gekennzeichnet, dass eine mittlere Länge der Werkzeugelementaufnahme (42) in etwa einer halben mittleren Länge der Griffmulde (28) entspricht.
• 23. Implantatsystem nach einem der voranstehenden Sätze, dadurch gekennzeichnet, dass der mindestens eine Probegelenkkopf (12) aus einem Kunststoff, insbesondere einem sterilisierbaren Kunststoff, ausgebildet ist.
• 24. Implantatsystem nach einem der voranstehenden Sätze, gekennzeichnet durch mindestens ein Lösewerkzeug (16) mit mindestens einem Löseelement (56), welches korrespondierend oder im Wesentlichen korrespondierend zu der mindestens einen Löseausnehmung (26b) ausgebildet ist.
• 25. Implantatsystem nach Satz 24, dadurch gekennzeichnet, dass das mindestens eine Löseelement (56) in Form eines Lösevorsprungs (60) ausgebildet ist.
• 26. Implantatsystem nach Satz 24 oder 25, dadurch gekennzeichnet, dass das mindestens eine Löseelement (56) kraft- und/oder formschlüssig mit der mindestens einen Löseausnehmung (26b), insbesondere der mindestens einen Löseausnehmung (26b) in Form einer Werkzeugausnehmung (42), in Eingriff bringbar ist.
• 27. Implantatsystem nach einem der Sätze 24 bis 26, dadurch gekennzeichnet, dass das mindestens eine Lösewerkzeug (16) zwei, drei, vier oder mehr Löseelemente (56) umfasst.
• 28. Implantatsystem nach einem der Sätze 24 bis 27, dadurch gekennzeichnet, dass das mindestens eine Lösewerkzeug (16) einen Schaft (54) umfasst und dass das mindestens eine Löseelement (56) an einem distalen Ende (62) oder in einem distalen Endbereich (64) des Schafts (54) angeordnet oder ausgebildet ist.
• 29. Implantatsystem nach Satz 28, dadurch gekennzeichnet, dass das mindestens eine Löseelement (56) parallel oder im Wesentlichen parallel zum Schaft (54) ausgerichtet ist.
• 30. Implantatsystem nach einem der Sätze 24 bis 29, dadurch gekennzeichnet, dass das mindestens eine Löseelement (56) eine Löseelementlängsachse (80) definiert, dass der Schaft (54) eine Schaftlängsachse (52) definiert und dass ein zwischen der Löseelementlängsachse (80) und der Schaftlängsachse (30) eingeschlossener Winkel (82) in einem Bereich von etwa 90° bis etwa 180° liegt.
• 31. Implantatsystem nach einem der Sätze 28 bis 30, dadurch gekennzeichnet, dass das mindestens eine Lösewerkzeug (16) ein Griffelement (76) umfasst, welches an einem proximalen Ende (74) oder in einem proximalen Endbereich des Schafts (54) angeordnet oder ausgebildet ist.
• 32. Implantatsystem nach einem der Sätze 24 bis 31, dadurch gekennzeichnet, dass das Lösewerkzeug (16) einstückig ausgebildet ist.
• 33. Implantatsystem nach einem der Sätze 24 bis 32, dadurch gekennzeichnet, dass das Lösewerkzeug (16) mindestens teilweise aus einem sterilisierbaren Metall hergestellt ist, insbesondere aus einem Flach- oder Rundstahl.
• 34. Implantatsystem nach einem der voranstehenden Sätze, gekennzeichnet durch zwei oder mehr Probegelenkköpfe (12), die einen unterschiedlichen Durchmesser aufweisen.

The above description therefore includes, in particular, the embodiments of an implant system listed below in the form of consecutively numbered sentences:

• 1. implant system ( 10 ), in particular hip joint implant system ( 11 ), comprising at least one probing head which can be clamped with a rasp shaft or a prosthesis shaft ( 12 ) with a spherical or substantially spherical joint surface ( 14 ), characterized in that the at least one probing head ( 12 ) at least one release recess ( 26a . 26b ), which in the region of the articular surface ( 14 ) is arranged or formed.
• 2. implant system according to sentence 1, characterized in that the at least one probing head ( 12 ) two, three, four or more release recesses ( 26a . 26b ) having.
• 3. Implant system according to sentence 2, characterized in that the two or more release recesses ( 26a . 26b ) uniformly over a circumference of the at least one probing head ( 12 ) are distributed.
• 4. implant system according to one of the preceding sentences, characterized in that the at least one release recess ( 26a . 26b ) a release recess longitudinal axis ( 30 ), which in particular parallel to one of the at least one probing head ( 12 ) defined longitudinal axis ( 22 ) runs.
• 5. Implant system according to one of the preceding sentences, characterized in that the at least one probing head ( 12 ) a distally facing open connection recording ( 18 ) for clampingly connecting with a corresponding connecting projection on a rasp shaft or a prosthesis shaft.
• 6. implant system according to sentence 5, characterized in that the connection recording ( 18 ) in the direction of the articular surface ( 14 ) tapers conically.
• 7. implant system according to sentence 5 or 6, characterized in that the at least one Sample head ( 12 ) an opening ( 38 ) having a fluid connection between the joint surface ( 14 ) and the connection ( 18 ).
• 8. implant system according to sentence 7, characterized in that the opening ( 38 ) in the form of a bore ( 40 ) is trained.
• 9. implant system according to one of the preceding sentences, characterized in that the at least one release recess ( 26a . 26b ) one of the at least one probing head ( 12 ) pointing away release recess surface ( 32 ) having.
• 10. implant system according to sentence 9, characterized in that the Löseausnehmungsfläche ( 32 ) of the at least one probing head ( 12 ) pointing away concavely curved.
• 11. implant system according to sentence 9 or 10, characterized in that the Löseausnehmungsfläche ( 32 ) in the form of a hollow cylindrical surface section ( 34 ) is trained.
• 12. Implant system according to one of the preceding sentences, characterized in that the at least one release recess ( 26a . 26b ) symmetrically with respect to one, one of the at least one probing head ( 12 ) defined longitudinal axis ( 22 ) containing symmetry plane ( 36 ) is trained.
• 13. implant system according to one of the preceding sentences, characterized in that the at least one release recess ( 26a . 26b ) in the form of a recessed grip ( 28 ) and / or in the form of a tool element receptacle ( 42 ) is trained.
• 14. Implant system according to sentence 13, characterized in that the tool element receptacle ( 42 ) relative to one of the at least one probing head ( 12 ) defined longitudinal axis ( 22 ) in the radial direction of the probing head ( 12 ) is pointing away.
• 15. Implant system according to sentence 13 or 14, characterized in that the tool element receptacle ( 42 ) relative to the recessed grip ( 28 ) a return ( 44 ) Are defined.
• 16. Implant system according to one of the sentences 13 to 15, characterized in that the tool element receptacle ( 42 ) two parallel or substantially parallel inner surfaces ( 46 ) having.
• 17. Implant system according to sentence 16, characterized in that the inner surfaces ( 46 ) parallel to the longitudinal axis ( 22 ).
• 18. implant system according to one of the sentences 13 to 17, characterized in that the tool element receptacle ( 42 ) a stop acting in the proximal direction ( 48 ) Are defined.
• 19. implant system according to sentence 18, characterized in that the stop ( 48 ) a stop surface pointing in the proximal direction ( 50 ).
• 20. Implant system according to sentence 20, characterized in that the stop surface ( 50 ) transversely, in particular perpendicular, to the inner surfaces ( 46 ) runs.
• 21. Implant system according to any one of sentences 13 to 20, characterized in that each recessed grip ( 28 ) a tool element receptacle ( 42 ) assigned.
• 22. Implant system according to one of the sentences 13 to 21, characterized in that an average length of the tool element receptacle ( 42 ) in about half the average length of the recessed grip ( 28 ) corresponds.
• 23. Implant system according to one of the preceding sentences, characterized in that the at least one proboscis ( 12 ) is formed from a plastic, in particular a sterilizable plastic.
• 24. Implant system according to one of the preceding sentences, characterized by at least one release tool ( 16 ) with at least one release element ( 56 ) corresponding to or substantially corresponding to the at least one release recess (FIG. 26b ) is trained.
• 25. Implant system according to sentence 24, characterized in that the at least one release element ( 56 ) in the form of a release projection ( 60 ) is trained.
• 26. Implant system according to sentence 24 or 25, characterized in that the at least one release element ( 56 ) positively and / or positively with the at least one Löseausnehmung ( 26b ), in particular the at least one release recess ( 26b ) in the form of a tool recess ( 42 ), is engageable.
• 27. implant system according to one of the sentences 24 to 26, characterized in that the at least one release tool ( 16 ) two, three, four or more release elements ( 56 ).
• 28. Implant system according to one of the sentences 24 to 27, characterized in that the at least one release tool ( 16 ) a shaft ( 54 ) and that the at least one release element ( 56 ) at a distal end ( 62 ) or in a distal end region ( 64 ) of the shaft ( 54 ) is arranged or formed.
• 29. implant system according to sentence 28, characterized in that the at least one release element ( 56 ) parallel or substantially parallel to the shaft ( 54 ) is aligned.
• 30. Implant system according to one of the sentences 24 to 29, characterized in that the at least one release element ( 56 ) a release element longitudinal axis ( 80 ) defines that the shaft ( 54 ) a shaft longitudinal axis ( 52 ) and that one between the release element longitudinal axis ( 80 ) and the shaft longitudinal axis ( 30 ) included angle ( 82 ) is in a range of about 90 ° to about 180 °.
• 31. implant system according to one of the sets 28 to 30, characterized in that the at least one release tool ( 16 ) a grip element ( 76 ), which at a proximal end ( 74 ) or in a proximal end region of the shaft ( 54 ) is arranged or formed.
• 32. Implant system according to one of the sentences 24 to 31, characterized in that the release tool ( 16 ) is integrally formed.
• 33. Implant system according to one of the sentences 24 to 32, characterized in that the release tool ( 16 ) is at least partially made of a sterilizable metal, in particular of a flat or round steel.
• 34. Implant system according to one of the preceding sentences, characterized by two or more sample joint heads ( 12 ), which have a different diameter.

The following description of preferred embodiments of the invention is taken in conjunction with the drawings for further explanation of the invention. Show it:

1 FIG. 2 is a perspective schematic overall view of a sample journall prior to engagement with a release tool; FIG.

2 : a perspective view of the arrangement 1 of the page;

3 a sectional view taken along line 3-3 in FIG 4 ; and

4 a sectional view taken along line 4-4 in 3 ,

In 1 is schematically a total with the reference numeral 10 illustrated implant system, which comprises one or more sample joint heads for clamping connection with a rasp or prosthesis shaft, not shown in the figures.

The example in 1 illustrated probing head 12 has a spherical or substantially spherical articular surface 14 on.

The implant system 10 also includes one or more release tools 16 ,

The sample cone head 12 has a connection record 18 on, in particular conical towards the articular surface 14 rejuvenated. The connection recording 18 is thus in the form of an inner cone 20 formed, which is designed corresponding to a protruding from the rasp or prosthesis stem conical connection projection.

The connection recording 18 is concentric with a longitudinal axis 22 formed, which pointing transversely to a distal direction, flat end surface 24 of the sample journalling head 12 extends.

The sample cone head 12 has at least one release recess 26a or 26b on that in the area of the articular surface 14 arranged or formed. The in the 1 to 4 Sample probing head shown by way of example 12 has four release holes 26a and four release recesses 26b on.

The release recesses 26a are in the form of recessed grips 28 educated. Every recessed grip 28 defines a release recess longitudinal axis 30 , This runs in the embodiment of the sample joint head shown in the figures 12 parallel to the longitudinal axis 22 ,

The release recesses 26a and 26b are even over a circumference of the probing head 12 distributed, in particular with respect to the longitudinal axis 22 ,

The recessed grip 28 defines one of the sample cone head 12 pointing away Löseausnehmungsfläche 32 ,

The Löseausnehmungsfläche 32 is in the in the 1 to 4 illustrated embodiment of the sample journalling 12 pointing concave from this point.

In particular, the Löseausnehmungsfläche 32 in the form of a hollow cylindrical surface section 34 be educated.

The release recesses 26a and 26b are preferably symmetrical with respect to a longitudinal axis 22 containing symmetry plane 36 educated.

The condyle 12 also has an opening 38 on, in particular in the form of a bore 40 can be trained. The opening 38 forms a fluid connection between the connection receptacle 18 and the articular surface 14 ,

The release recesses 26b are in the form of tool element receptacles 42 educated.

Each tool element holder 42 is in the embodiment of the sample journalling head shown in the figures 12 symmetrical to a recessed grip 28 arranged, in particular symmetrical to the respective plane of symmetry 36 , The tool element holder 42 defines a return 44 based on the recessed grip 28 ,

The tool element holder 42 is relative to the longitudinal axis 22 in the radial direction of the sample cone head 12 pointing away. It has two parallel or substantially parallel inner surface 46 to point to each other.

The inner surfaces 46 preferably run parallel to the longitudinal axis 22 ,

Furthermore, the tool element holder 42 a stop acting in the proximal direction 48 on which a pointing in the proximal direction stop surface 50 includes. The stop surface 50 runs transversely, preferably perpendicular, to the inner surfaces 46 ,

In the embodiment of a sample journalling head shown in the figures 12 is every grip 28 a tool element holder 42 assigned. They thus form two adjacent or contiguous Löseausnehmungen 26a and 26b ,

As in particular in 4 shown schematically, corresponds to an average length of the tool element holder 42 about half the average length of the recessed grip 28 ,

The sample cone head 12 is made of a plastic, for example. It is preferably a sterilizable plastic.

In particular, the implant system 10 several sample joint heads 12 include. These may differ in particular in that they differ from the articular surfaces 14 have defined diameter.

For example, sample journals 12 have different colors or markings with different diameters, so that an operator can easily distinguish them during a surgical procedure.

The release tool 16 , which exemplifies in the 1 to 4 is shown, comprises a shaft longitudinal axis 52 defining shank and two release elements 56 , Alternatively, the release tool 16 even only one or three or more release elements 56 include.

The two release elements 56 are symmetrical to the shaft longitudinal axis 52 containing mirror plane 58 arranged and formed to each other. They each define a release projection 60 which corresponding or substantially corresponding to one of the Löseausnehmungen 26b is trained.

The two release elements 56 form a fork-shaped distal end of the release tool 16 , They are at a distal end 62 or in a distal end region 64 of the shaft 54 arranged or trained.

In the embodiment of the release tool shown in the figures 16 are the release elements 56 parallel to the shaft 54 aligned. Together they form a fork-shaped arrangement or a fork-shaped end of the release tool 16 so that the two release tabs 60 the opening 38 at the same time in each case in a tool element holder 42 can intervene, as exemplified in the 3 and 4 is shown. The release tool 16 can thus come from the proximal to the probing head 12 be attached to distal end surfaces 66 the release tabs 60 at the stop surfaces 50 attacks.

The release elements 56 may in particular be designed such that they positively and / or positively with one or more Löseausnehmungen 26b can be brought into engagement.

The tool element holders 42 also have the inner surfaces 46 interconnecting, hollow cylindrical, from the longitudinal axis 22 away-facing inner surface areas 68 on. A distance between inner surface areas 68 diametrically related to the longitudinal axis 22 opposing tool element receptacles 42 corresponds approximately to a distance 70 between facing side surfaces 72 the release elements 56 ,

At a proximal end 74 of the shaft 54 is a handle element 76 arranged or formed, which two transverse, in particular perpendicular to the shaft longitudinal axis 52 protruding handle members 78 having. This will be a T-shaped end of the release tool 16 educated.

The release tool 16 can optionally be formed from a round material or a flat material. That in the 1 to 4 schematically illustrated embodiment of a release tool 16 is made of a flat material, preferably made of a flat instrument steel, for example by punching.

Not shown in the figures are alternative embodiments of release tools. These can be through the release elements 56 defined release element longitudinal axes 80 and the shaft longitudinal axis 52 an angle 82 which is in a range of about 90 ° to about 180 °. At the in 2 illustrated embodiment, the angle 82 180 °.

Be the release elements 56 , as in 4 shown schematically, with the tool element receptacles 42 engaged, so can by turning the release tool 16 around the shaft longitudinal axis 52 the sample cone head 12 twisted and thereby be solved by the connection projection of the rasp or prosthesis stem in a simple manner.

Even without the use of the release tool 16 can the sample cone head 12 be easily and safely solved by an operator from the rasp or prosthesis shaft by this with his fingers in the recessed grips 28 engages and the sample cone head 12 around the longitudinal axis 22 twisted so that the clamping cone connection between the probing head 12 and the connecting projection on the rasp or prosthesis stem triggers.

LIST OF REFERENCE NUMBERS

10

 implant system

11

 Hip implant system

12

 Sample condyle

14

 articular surface

16

 release tool

18

 connection Low

20

 inner cone

22

 longitudinal axis

24

 end face

26a

 Löseausnehmung

26b

 Löseausnehmung

28

 grip

30

 Löseausnehmungslängsachse

32

 Löseausnehmungsfläche

34

 surface section

36

 plane of symmetry

38

 perforation

40

 drilling

42

 Tool element receiver

44

 return

46

 palm

48

 attack

50

 stop surface

52

 long shaft axis

54

 shaft

56

 release element

58

 mirror plane

60

 release projection

62

 The End

64

 end

66

 end face

68

 Internal surface area

70

 distance

72

 side surface

74

 The End

76

 handle element

78

 handle member

80

 Release element longitudinal axis

82

 angle

Claims (25)

Implant system ( 10 ), in particular hip joint implant system ( 11 ), comprising at least one probing head which can be clamped with a rasp shaft or a prosthesis shaft ( 12 ) with a spherical or substantially spherical joint surface ( 14 ), characterized in that the at least one probing head ( 12 ) at least one release recess ( 26a . 26b ), which in the region of the articular surface ( 14 ) is arranged or formed. Implant system according to claim 1, characterized in that the at least one proboscis ( 12 ) two, three, four or more release recesses ( 26a . 26b ) having. Implant system according to claim 2, characterized in that the two or more release recesses ( 26a . 26b ) uniformly over a circumference of the at least one probing head ( 12 ) are distributed. Implant system according to one of the preceding claims, characterized in that the at least one probing head ( 12 ) a distally facing open connection recording ( 18 ) for clampingly connecting with a corresponding connecting projection on a rasp shaft or a prosthesis shaft. Implant system according to claim 4, characterized in that the at least one probing head ( 12 ) an opening ( 38 ) having a fluid connection between the joint surface ( 14 ) and the connection ( 18 ). Implant system according to one of the preceding claims, characterized in that the at least one release recess ( 26a . 26b ) one of the at least one probing head ( 12 ) pointing away release recess surface ( 32 ) having. Implant system according to claim 6, characterized in that the Löseausnehmungsfläche ( 32 ) of the at least one probing head ( 12 ) pointing away concavely curved. Implant system according to claim 6 or 7, characterized in that the Löseausnehmungsfläche ( 32 ) in the form of a hollow cylindrical surface section ( 34 ) is trained. Implant system according to one of the preceding claims, characterized in that the at least one release recess ( 26a . 26b ) symmetrically with respect to one, one of the at least one probing head ( 12 ) defined longitudinal axis ( 22 ) containing symmetry plane ( 36 ) is trained. Implant system according to one of the preceding claims, characterized in that the at least one release recess ( 26a . 26b ) in the form of a recessed grip ( 28 ) and / or in the form of a tool element receptacle ( 42 ) is trained. Implant system according to claim 10, characterized in that the tool element receptacle ( 42 ) relative to one of the at least one probing head ( 12 ) defined longitudinal axis ( 22 ) in the radial direction of the probing head ( 12 ) is pointing away. Implant system according to claim 10 or 11, characterized in that the tool element receptacle ( 42 ) two parallel or substantially parallel inner surfaces ( 46 ) having. Implant system according to claim 12, characterized in that the inner surfaces ( 46 ) parallel to the longitudinal axis ( 22 ). Implant system according to one of claims 10 to 13, characterized in that the tool element receptacle ( 42 ) a stop acting in the proximal direction ( 48 ) Are defined. Implant system according to one of claims 10 to 14, characterized in that each recessed grip ( 28 ) a tool element receptacle ( 42 ) assigned. Implant system according to one of claims 10 to 15, characterized in that an average length of the tool element receptacle ( 42 ) in about half the average length of the recessed grip ( 28 ) corresponds. Implant system according to one of the preceding claims, characterized in that the at least one probing head ( 12 ) is formed from a plastic, in particular a sterilizable plastic. Implant system according to one of the preceding claims, characterized by at least one release tool ( 16 ) with at least one release element ( 56 ) corresponding to or substantially corresponding to the at least one release recess (FIG. 26b ) is trained. Implant system according to claim 18, characterized in that the at least one release element ( 56 ) positively and / or positively with the at least one Löseausnehmung ( 26b ), in particular the at least one release recess ( 26b ) in the form of a tool recess ( 42 ), is engageable. Implant system according to claim 18 or 19, characterized in that the at least one release tool ( 16 ) two, three, four or more release elements ( 56 ). Implant system according to one of claims 18 to 20, characterized in that the at least one release tool ( 16 ) a shaft ( 54 ) and that the at least one release element ( 56 ) at a distal end ( 62 ) or in a distal end region ( 64 ) of the shaft ( 54 ) is arranged or formed. Implant system according to claim 21, characterized in that the at least one release element ( 56 ) parallel or substantially parallel to the shaft ( 54 ) is aligned. Implant system according to one of claims 18 to 22, characterized in that the at least one release element ( 56 ) a release element longitudinal axis ( 80 ) defines that the shaft ( 54 ) a shaft longitudinal axis ( 52 ) and that one between the release element longitudinal axis ( 80 ) and the shaft longitudinal axis ( 30 ) included angle ( 82 ) is in a range of about 90 ° to about 180 °. Implant system according to one of claims 21 to 23, characterized in that the at least one release tool ( 16 ) a grip element ( 76 ), which at a proximal end ( 74 ) or in a proximal end region of the shaft ( 54 ) is arranged or formed. Implant system according to one of claims 18 to 24, characterized in that the release tool ( 16 ) is integrally formed.

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