DE202011050009U1 - Surgical adapter device for a joint implant and surgical system - Google Patents

Abstract

Surgical adapter device for a joint implant (12; 152) having a hollow spherical joint surface (24) and an implant edge (26) on the proximal side, which defines an implant axis (30), which adapter device (14; 154) can be brought into line with the implant axis (30) Device axis (44) defined and comprises an edge area (46) and an articular surface contact area (48), the edge area (46) being arranged radially outside the articular surface contact area (48) and on the edge area (46) a connecting device (49) for releasably connecting the adapter device (14; 154) is arranged with the implant edge (26), and the articular surface contact area (48) projects beyond the edge area (46) in the distal direction and at least one contact surface (64, 108; 180) for contacting the articular surface (24) Contact element (62, 98; 176), characterized in that the connecting device (49) at least one vo Holding element (54) projecting in the distal direction in the edge region (46) for contacting an outer wall (36) of the joint implant (12; 152) and that between the at least one holding element (54) and the articular surface contact area (48) at least one ...

Description

The invention relates to a surgical adapter device for a joint implant having a hollow spherical surface and implant edge defining an implant axis, which adapter device defines a device axis which can be brought into alignment with the implant axis and comprises an edge region and a joint surface contact region, wherein the edge region is arranged radially outside the joint surface contact region and at the edge region, a connecting device for releasably connecting the adapter device is arranged with the implant edge, and wherein the Gelenkflächenkontaktbereich projects beyond the edge region in the distal direction and comprises at least one contact surface for contacting the joint surface exhibiting contact element.

In addition, the invention relates to a surgical system comprising a joint implant having a hollow spherical articular surface and a proximal implant rim defining an implant axis and an adapter device detachably connectable to the joint implant.

An adapter device and a surgical system of the aforementioned type are in the FR 2 911 062 B1 described. The joint implant is a two-part acetabular cup with a metallic outer cup into which a ceramic inner cup having the articular surface is inserted. For handling the joint implant, the adapter device is provided, which dips into the joint surface contact area in a cavity bounded by the joint surface and can contact the joint surface by means of the at least one contact element. The articular surface contact area may, for example, be configured in a convex manner in sections, relative to a viewing direction to the proximal. Impact forces that the surgeon exerts on the adapter device can be transmitted to the joint implant via the articular surface contact area to provide a reliable and correct fit in the bone, here the human pelvic bone. With respect to the device axis radially outside of the joint surface contact region, the adapter device has the edge region. The adapter device is connected to the implant rim via the connection device arranged around it, which is arranged at the edge region, wherein the connection takes place by positive locking with the metallic outer socket. This has the purpose that on the ceramic inner socket no connecting elements need to be provided in order to avoid damage to the inner socket. Therefore, entering into the connection of the adapter device with the joint implant necessarily requires a projection of the outer socket over the inner socket in the proximal direction. Given a given overall size of the joint implant, the range of movement achievable with the joint implant, which is predetermined by the size of the inner socket, is thereby undesirably limited.

"Proximal" and "distal" are to be understood in the present case as referring to an operator handling the adapter device and the joint implant. The surgeon acts on the adapter device from the proximal to distal direction, and the adapter device dips into the cavity defined by the joint surface with the articulation surface contact area arranged distally.

In the present case, "axial" and "radial" are to be understood as referring to the device axis, whereby "axial" also includes "parallel to the device axis".

Another generic adapter device is in the EP 0 216 794 B1 described. This adapter device has a relatively complicated construction.

Object of the present invention is to provide an adapter device and a surgical system of the type mentioned, which is or more versatile.

This object is achieved in a generic adapter device according to the invention in that the connecting device comprises at least one protruding from the edge region in the distal direction retaining element for application to an outer wall of the joint implant and that between the at least one holding element and the Gelenkflächenkontaktbereich at least one receptacle for at least partially receiving the implant edge is formed.

In the case of the adapter device according to the invention, the connecting device comprises the at least one retaining element which protrudes in the distal direction from the edge region. The at least one retaining element can thereby engage behind the implant edge and be applied on the outside to an outer wall of the joint implant in order to ensure a reliable connection between the adapter device and the joint implant. Between the at least one holding element and the Gelenkflächenkontaktbereich the at least one receptacle is formed, in which the implant edge is at least partially inserted. In particular, it is possible to dimension the at least one receptacle such that, given a predetermined size of the joint implant, the implant rim can be positively inserted between the at least one retaining element and the articular surface contact area in the at least one receptacle. this makes possible a particularly reliable fixation of the adapter device on the implant edge, which is contacted on the inside by the articular surface contact region and on the outside by the at least one retaining element.

Unlike the one mentioned in the beginning FR 2 911 062 B1 known adapter device, it is not necessary that the joint implant to be adapted on the inside of the implant edge has a connecting element for cooperation with the connecting device of the adapter device. This makes it possible for the adapter device according to the invention to be used both with a joint implant whose outer socket has a projection with respect to the inner socket on the proximal side, and with a joint implant which has a planar implant edge on the proximal side. The latter joint implant can be both a joint implant constructed from an external cup and an internal cup, which are aligned with one another at the proximal end to form the planar implant rim, and a one-piece joint implant having a planar implant rim, for example a full ceramic cup. In the case of all mentioned joint implants, the connection of the adapter device to the joint implant takes place by engaging behind the implant edge by means of the at least one holding element and at least partially inserting the implant edge into the at least one receptacle. The adapter device according to the invention is therefore particularly versatile. In particular, as mentioned, the adapter device can be used with a joint implant which has a planar edge on the proximal side. Therefore, using the adapter device according to the invention, joint implants can preferably be handled that allow a maximum range of motion of the joint for a given overall size.

It is favorable if the at least one retaining element is inclined in the distal direction in the direction of the device axis or has an inclination. This makes it possible to undercut the implant edge of the socket by means of the at least one retaining element on the outside and ensures a particularly secure fit of the adapter device on the joint implant. The inclination of the at least one retaining element or an inclined portion of the at least one retaining element relative to the distal direction may be, for example, about 2 ° to about 10 °, and preferably about 5 °.

Preferably, the at least one retaining element is designed to be elastically deformable in the radial direction. The at least one receptacle between the at least one holding element and the articular surface contact region is thereby expandable in the radial direction. By elastically deforming the at least one retaining element in the radial direction, the at least one receptacle can be widened in order to connect the adapter device to the joint implant and to detach the adapter device from the joint implant.

It is advantageous if the at least one holding element is formed closed in the circumferential direction of the device axis. Thereby, the adapter device can be connected to the joint implant along the entire circumference of the device axis. The at least one retaining element is, for example, a retaining ring protruding from the edge region.

In an advantageous embodiment of the adapter device according to the invention, the at least one retaining element is designed lip-shaped, wherein the lip is particularly preferably in particular radially elastically deformable and inclined relative to the distal direction in the direction of the device axis.

Preferably, the at least one retaining element is arranged on an outer edge of the adapter device. As a result, the adapter device can be given a compact design, and the joint implant can be implanted as minimally as possible using the adapter device.

It is advantageous if the connecting device comprises at least one abutment surface exhibiting contact element for application to the implant edge, which is radially less far from the device axis spaced than the at least one holding element. The adapter device can be applied flat to the implant edge via the at least one contact element arranged at the edge region. This allows a reliable positioning of the adapter device and the joint implant in particular distal direction relative to each other.

Preferably, the at least one contact surface is planar. As a result, the at least one contact element thus forms a contact flange for the edge of the implant in order to ensure a particularly well-defined relative position of the adapter device and the joint implant relative to one another. In particular, when a joint implant with proximal planar implant edge is used, the adapter device can be as large as possible abut the implant edge.

It is favorable if the at least one contact surface defines a plane oriented perpendicular to the device axis. Indicates the joint implant perpendicular to the implant axis aligned end-face planar contact surface, can be achieved in this way the largest possible contact area between the adapter device and the implant edge.

By way of example, the adapter device can rest against the implant rim over as large an area as possible if the at least one contact surface is continuous in the circumferential direction of the device axis.

In a different advantageous embodiment of the adapter device according to the invention can be provided that more than one contact element is provided, wherein the plurality of abutment elements each occupy a limited angular range in the circumferential direction of the device axis and are spaced from each other.

The edge region is preferably arranged on the adapter device at the proximal end. This makes it possible to give the adapter device as compact as possible.

Advantageously, the adapter device is partially and preferably designed to be elastically deformable overall and, for example, made of a plastic material. The elastic deformability of the adapter device not only facilitates its connection to and release from the joint implant, but also serves to protect the joint implant, especially its articular surface. The adapter device can transmit impact forces exerted by the operator over the articular surface contact area to the joint implant without damaging the articular surface. This is particularly important when a ceramic component of the joint implant has the articular surface.

It is favorable, in particular in combination with the last described advantageous embodiment, when the adapter device is designed shell-shaped or substantially cup-shaped. The cup-shaped or substantially cup-shaped configuration makes it structurally simple to form the adapter device elastically deformable. In particular, the adapter device on the articular surface contact region is at least partially configured in the manner of a spherical shell and adapted to the hollow-spherical articular surface of the joint implant.

The contact surface of the at least one contact element preferably forms, at least in sections, the surface of a contact sphere defined by the adapter device. The contact surface is at least partially spherically formed, so that the at least one contact element over the contact surface can lie flat against the hollow spherical joint surface when the radius of the contact sphere is adapted to the radius of the joint surface. This allows a good fit of the adapter device on the joint implant. Furthermore, impact forces of the surgeon can be reliably transmitted to the articular surface.

Preferably, the connecting device comprises at least one bearing element having a contact surface for application to the implant edge, which defines an equatorial plane of the contact sphere. This makes it possible, for example, to apply the at least one contact element flat to a planar implant edge of a joint implant, which has a maximum range of motion in the case of a hemispherical shell.

It is advantageous if the contact surface of at least one contact element adjoins the edge region or is substantially adjacent to the edge region. This makes it possible, when adapting the size of the adapter device to the size of the joint implant, to ensure a particularly well-defined relative position of the adapter device and the joint implant, the contact surface contacting the joint surface adjacent to the edge region. Holding forces that a surgeon exerts on the adapter device may also be transmitted to the articular surface near the periphery so that the articular implant can be reliably handled.

It can be provided that at least one contact element is configured concave, at least in sections, when viewed in the proximal direction. With the concave portion, the at least one contact element does not contact the articular surface of a joint implant connected to the adapter device. As a result, a gap is formed between the concave portion and the joint surface. A user may thereby proximally engage the gap to engage behind the at least one contact element and thereby release the adapter device from the joint implant.

The adapter device preferably comprises or defines on the distal side a vertex, over which the contact surface of a contact element extends or which advantageously surrounds the contact surface of a contact element in a coherent manner. Impact forces which the surgeon exerts on the adapter device can thereby be transmitted in the axial or essentially in the axial direction via the contact element to the joint implant. This makes it possible to reliably anchor the joint implant while exerting the lowest possible impact force in the bone. The exercise of a minimum Impact force is used to avoid damage to the articular surface, especially when it is formed on a ceramic component of the joint implant. The device axis runs through the vertex. If the adapter device defines a contact sphere with the contact surface of the at least one contact element, the vertex is the pole of the contact sphere.

It can be provided that a concave portion of at least one contact element of the advantageous embodiment of the adapter device according to the invention described above adjoins the contact element, whose contact surface extends over the vertex or surrounds the vertex.

It can further be provided that the articular surface contact region comprises exactly one contact element, for example a spherical shell-shaped contact element or a hemispherical contact element.

It proves to be favorable in another advantageous embodiment, when the articular surface contact area comprises a plurality of contact elements.

Advantageously, two or more contact elements in the circumferential direction of the device axis each occupy a limited angular range and are spaced from each other. As a result, the adapter device, for example, using lower forces elastically deformable. This has an advantage in practice for the handling of the adapter device. If at least one contact element comprises a concave portion as mentioned above, an operator can engage between adjacent contact elements in the space between the concave portion and the articular surface to release the adapter device from the joint implant.

In a structurally simple embodiment of the adapter device, the two or more contact elements are uniformly spaced from each other, d. H. Each two adjacent contact elements have the same angular distance from each other in the circumferential direction of the device axis.

In a further structurally simple embodiment of the adapter device, the two or more contact elements are identical.

In a structurally simple way, the two or more contact elements can be configured, if they are designed spoke-shaped and, for example, are radially outside connected to the edge region.

In particular, five contact elements, each occupying a limited angular range in the circumferential direction of the device axis, can be provided.

It is advantageous if the joint surface contact region comprises a central element, from which the two or more contact elements project in the radial direction, for example in order to connect the central element to the edge region.

It is advantageous if the central element is configured hub-shaped. For example, the central element may comprise one of the openings mentioned below in which a release element which is movable relative to the articular surface contact region for releasing the adapter device from the joint implant is arranged. It may further be provided that a connecting device is arranged on the central element, which enables the detachable connection of the adapter device with a handling device. For example, an opening provided with an internal thread can be provided on the central element, into which a handling instrument can be screwed.

It is also conceivable for the central element to comprise or form a contact element which has a contact surface which extends over a vertex encompassed or defined by the adapter device or surrounds the vertex.

It is advantageous if the articular surface contact region has at least one opening and if in the at least one opening, a release element which is movable relative to the articular surface contact region is arranged, which has a contact surface on the distal side for contacting the articular surface. In this advantageous embodiment, the adapter device comprises at least one release element, which is arranged in one of the one or more openings of the articular surface contact region and is movable relative to the articular surface contact region. A release force can be exerted on the release element, for example in the axial direction, in order to transfer the release element from a holding position into a release position. In the holding position, the joint implant can be held on the adapter device. By transferring the release element into the release position, the adapter device can be released from the joint implant. About the contact surface of the release element, the release force can be transferred to the joint surface during transfer to the release position. So that the release element can be acted upon in a simple manner, the at least one opening preferably extends to a proximal end of the adapter device. A reliable relative movement of the release element relative to the Gelenkflächenkontaktbereich is ensured by the release element is movably mounted on the articular surface contact area.

Optionally, in an adapter device of the type mentioned above to achieve the same advantages may be provided that the Gelenkflächenkontaktbereich has at least one opening and that in the at least one opening a movable relative to the Gelenkflächenkontaktbereich releasing element is arranged, the distal side has a contact surface for contacting the articular surface.

Conveniently, the contact surface of the release element is formed spherically as a portion of the contact sphere defined by the adapter device, when the release element assumes the holding position.

Preferably, the release element is axially movable relative to the articular surface contact region, so that a particular releasing force acting axially on the release element can be effectively transmitted to the articular surface. In order to release the adapter device from the joint implant, it may be provided, for example, that a holding force acts on the joint surface contact region and that the release force acts on the release element in the opposite direction. The release force can be aligned in the distal direction in order to act on the articular surface when transferring the release element from the holding position to the release position with the release force. The holding force opposite the release force makes it possible to disengage the at least one retaining element from the implant rim and to release the adapter device in the proximal direction from the joint implant.

Preferably, the release element is displaceable relative to the Gelenkflächenkontaktbereich. This allows the adapter device to be disengaged from the joint implant without rotating it or a portion thereof relative to the joint implant. The joint surface, in particular a joint surface formed by a ceramic component, is thereby protected from damage by the adapter device.

It is advantageous if the adapter device comprises at least one stop member for limiting the movement of the release element and the Gelenkflächenkontaktbereiches relative to each other. In particular, in each case at least one stop member is provided for limiting the movement of the release element and the Gelenkflächenkontaktbereiches relative to each other both in the proximal direction and in the distal direction.

The handling of the adapter device is simplified in that the release element is held captive on the contact element at the apex area. This is advantageous, for example, in releasing the adapter device from the joint implant in order to prevent the release element from undesirably remaining in the body.

For example, the release element is latched to the contact element at the apex area.

In an advantageous embodiment of the adapter device according to the invention a central, the device axis enclosing opening is provided, which may be formed in particular in the above-mentioned central element. The central opening conveniently passes through the articular surface contact area and has an internal thread into which a handling device for the adapter device can be screwed.

It is favorable, in particular in the case of the last-described advantageous embodiment of the adapter device, when the adapter device includes or defines a vertex on the distal side, over which the contact surface of the release element extends or which advantageously surrounds the contact surface of the release element in a coherent manner. The vertex is preferably the pole of the contact sphere defined by the adapter device. This makes it possible to act on the joint surface at the apex region, in particular at the vertex itself or around the vertex, effectively with a release force for releasing the adapter device from the joint implant.

Preferably, the contact surface of the release element is gap-free or substantially gap-free attached to the contact surface of the at least one contact element and in particular to the contact surfaces of all contact elements of Gelenkflächenkontaktbereiches when the release element occupies the holding position. The contact surfaces of the release element and the contact surface of at least one contact element complete each other to allow the largest possible total contact surface of the adapter device with the articular surface.

It is advantageous if the contact surface of the release element continues steadily an outer contour of the contact surface of the at least one contact element when the release element assumes the holding position. In particular, the contact surface of the release element forms in sections the surface of the above-mentioned contact sphere defined by the adapter device. This proves to be advantageous in handling the adapter device and a joint implant held thereon and in releasing the adapter device from the joint implant.

In a simple constructive embodiment, the release element is preferably designed plug-shaped, in particular in the form of a mushroom-shaped plug, especially with lying on the defined by the adapter device Kontaktsphäre distal-side contact surface.

It is advantageous if the adapter device is formed integrally apart from the release element to achieve the simplest possible structural design of the adapter device.

If the adapter device has no release element, to achieve the same advantage, it can be provided that the adapter device is formed in one piece.

Advantageously, the release element for detachably connecting it to a handling instrument for the adapter device comprises a first connection device on the proximal side. The handling device may be connected to the release element on the one hand to implant the adapter device and the joint implant held thereon. On the other hand, a release force can be exerted on the release element via the handling device. The handling instrument can be connected to the release element in a non-positive and / or positive-locking manner via the connection device, for example, wherein the first connection device can be, in particular, a clamping device or a latching device.

As already mentioned, it can be provided that the at least one opening is provided with an internal thread. The internal thread can be considered as part of a second connection device included in the joint surface contact area in order to connect a handling instrument for the adapter device to the joint surface contact area. To facilitate this, it can be provided that the opening provided with the internal thread extends to the proximal end of the joint surface contact region.

It is advantageous if in the at least one opening, a relative to the Gelenkflächenkontaktbereich and relative to the release element movable Löseelementbeaufschlagungselement is arranged. This gives the possibility of not applying directly to the release element using a handling device with the release force. Instead, the release force can be transferred from the handling device to the release element loading element and transferred from the latter to the release element in order to transfer it from the holding position into the release position. This proves to be particularly advantageous if the Löseelementbeaufschlagungselement is designed as a screw which is screwed into an internally threaded opening of the Gelenkflächenkontaktbereiches. By screwing the Löseelementbeaufschlagungselementes relative to the Gelenkflächenkontaktbereich a release force can be exerted by the surgeon itself to a relatively displaceable relative to the Gelenkflächenkontaktbereich release element finely dosed. This makes it possible to gently and evenly loosen the adapter device from the joint implant in an implant-friendly manner.

It is advantageous if, as already mentioned, the articular surface contact region comprises a second connection device for its detachable connection to a handling instrument for the adapter device. This gives the possibility to reuse the handling instrument. This is advantageous, for example, if the joint implant is delivered with a factory pre-assembled adapter device. For handling the adapter device and the joint implant held thereon, the handling instrument can be connected to the second connection device, which can be, for example, a latching device or a clamping device. In general, a non-positive and / or positive connection of the adapter device with the handling instrument is conceivable. The second connection means may comprise the above-mentioned thread of at least one opening in the joint surface contact area, the opening being favorably formed on the above-mentioned central element.

In particular, it can be provided that the second connecting device has an annular groove surrounding the device axis. The annular groove forms a receptacle in which an arranged on the handling instrument annular projection can engage positively to ensure a reliable connection of the handling instrument and the adapter device with each other. For example, the annular groove is arranged on the proximal side on the joint surface contact region and in particular on the above-mentioned central element.

Preferably, the second connecting device has an anti-rotation element with a non-circular cross-section perpendicular to the device axis. The anti-rotation element is, for example, a receptacle on the articular surface contact area or a projection of the articular surface contact area with polygonal profile. The anti-rotation element can be brought into engagement with a correspondingly formed anti-rotation element of the handling device, about a screw element of the handling device in a simpler manner in an internally threaded opening of the Articulating surface contact area for adapting the adapter device to screw.

As mentioned above, the invention also relates to a surgical system. In a generic surgical system, the object set in the present invention is achieved in that the adapter device is one of the adapter devices described above.

By means of the surgical system, the advantages which can already be achieved in connection with the explanation of the adapter device according to the invention or the explanation of advantageous embodiments of the adapter device according to the invention can likewise be achieved.

It is advantageous if the adapter device is preassembled on the joint implant. This facilitates a surgeon's handling of the joint implant, and an operation step can be saved.

In particular, it may be provided that the joint implant comprises a component comprising a ceramic surface made of a ceramic material. Using the adapter device according to the invention or one of the advantageous embodiments thereof, protection of the joint surface against damage is possible.

The joint implant may be an acetabular cup, for example a full ceramic acetabular cup or a two-part acetabulum with a particularly metallic outer cup into which a ceramic inner cup is inserted.

The following description of preferred embodiments of the invention is used in conjunction with the drawings for a more detailed explanation of the invention. Show it:

1 a perspective view of a first preferred embodiment of a surgical system according to the invention in an exploded view, comprising a first preferred embodiment of an adapter device according to the invention;

2 : the system off 1 in the assembled state, partially cut open;

3 : A plan view of the system along the arrow "3" in 2 ;

4 a sectional view taken along the line 4-4 in 3 ;

5 FIG. 2 is a schematic sectional view of a distal end of a handling device for the system. FIG 1 ;

6 a perspective view of a second preferred embodiment of a surgical system according to the invention in the assembled state, comprising a second preferred embodiment of an adapter device according to the invention, wherein the system is connected to a handling device for the system;

7 : a perspective view of the system 6 in an exploded view;

8th : a top view of the system 6 in the distal direction and

9 a sectional view taken along the line 9-9 in 8th ,

1 shows a perspective exploded view of a first preferred embodiment of a total with the reference numeral 10 occupied surgical system. The surgical system 10 includes a joint implant 12 and a detachably connectable with this preferred first embodiment of an adapter device according to the invention 14 ,

At the joint implant 12 it is a part of an artificial joint, namely a socket 16 , The joint socket 16 In particular, there is an acetabulum implanted in the human pelvis and capable of interacting with another joint implant, not shown in the drawing. The other joint implant is a femoral joint component with a condyle inserted into the socket 16 can intervene.

The joint socket 16 is presently formed in two parts and includes a first joint component 18 and a second joint component connected thereto 20 , The first joint component 18 is a particular metallic outer pan 19 with a spherical outer anchoring surface for attachment to the pelvic bone. The second joint component 20 is an inner pan 21 made of a ceramic material that is in the of the outer pan 19 defined receiving space is used. The outer pan 19 and the inner pan 21 are via a press fit on a conical pressing surface 22 connected with each other.

On her the outer pan 19 the inside facing away from the inner pan 21 a joint surface 24 on. The articular surface 24 is hollow spherical in shape to provide maximum mobility of the joint implant 12 cooperating Articulated to allow for three axes aligned perpendicular to each other.

The joint socket 16 is configured overall spherical shell-shaped, in particular, it has the shape of a hemisphere shell, the proximal side an implant edge 26 includes. At the implant edge 26 is a frontal contact surface 28 the joint socket 16 formed, and together from the outer pan 19 and from the inner pan 21 , The contact surface 28 is planar and defines an equatorial plane of the socket 16 defined spherical shell. The equatorial plane is perpendicular to one of the socket 16 defined implant axis 30 aligned.

On the outside of the implant rim 26 is by a return 32 the outer pan 19 which is slightly distally offset with respect to the equatorial plane, an annular recess 34 educated. The recess 34 is radially inwardly limited by a circumferential wall section 36 concerning the implant axis 30 is conically inclined by a small angle, for example, by an angle of approximately 5 °.

With the joint socket 16 at the outside pan 19 and the inner pan 21 on the proximal side together on the contact surface 28 can complete, with minimal external dimensions of the socket 16 nevertheless, a maximum range of motion of the in the joint socket 16 used condyle can be achieved. In particular, the range of motion is not limited by the fact that about the outer pan 19 in the proximal direction over the inner pan 21 at the implant edge 26 survives.

"Proximal" and "distal" are present in relation to the system 10 to refer to the operating surgeon. The surgeon attacks from the proximal to the surgical system 10 and implant the socket 16 with a distal end 38 ahead in the pelvic bone.

The adapter device according to the invention 14 serves the surgeon for simplified handling of the socket 16 and to protect the ceramic inner pan 21 , in particular their joint surface 24 , The adapter device 14 includes a proximal end 40 and a distal end 42 , and it defines a device axis 44 , The device axis 44 is in the in the 2 to 4 illustrated connected state of the adapter device 14 with the socket 16 relative to its implant axis 30 in accordance bring bar.

At the proximal end 40 has the adapter device 14 an annular edge region 46 on, starting from which towards the distal end 42 a Gelenkflächenkontaktbereich him superior in the distal direction 48 extends. The articular surface contact area 48 is convex in sections, with "convex" in this case with respect to a viewing direction to refer to proximal, ie from the side of the socket 16 on the adapter device 14 , The border area 46 surrounds the articular surface contact area 48 radially outside, relative to the device axis 44 ,

At the edge area 46 includes the adapter device 14 a connection device 49 with a device axis 44 annularly surrounding contact element 50 that has an annular contact surface 52 having. The contact surface 52 is corresponding to the contact surface 28 of the implant edge 26 formed so that the adapter device 14 flat and flange on the contact surface 28 of the implant edge 26 can be present. This defines the contact surface 52 a plane, which is in particular an equatorial plane A of a contact surface K, which will be explained below, that of the adapter device 10 for contacting the articular surface 24 is defined.

Radially outside with respect to the contact surface 52 includes the connection device 49 a circumferential retaining element 54 that of the investment element 50 projects. The holding element 54 is a distal direction of the contact element 50 protruding lip 56 , The lip 56 is in the circumferential direction of the device axis 44 formed contiguous and limits the adapter device 14 on the outside, ie it is on an outer edge 58 same arranged.

Regarding the device axis 44 has the lip 56 an inclination equal to the inclination of the wall portion 36 the outer pan 19 with respect to the implant axis 30 is. Thus, the lip is 56 relative to the device axis 44 slightly conical and inclined at about 5 °.

The adapter device 14 is sized to the lip 56 the implant rim 26 Can engage behind the outside, with the contact surfaces 28 and 52 can lie against each other and the lip 56 at the wall section 36 abut and with the implant edge 26 can engage on the outside. Through the undercut in the area of the recess 34 and the correspondingly formed inclination of the lip 56 becomes a reliable seat of the adapter device 14 on the socket 16 allows. This allows the socket 16 by means of the adapter device 14 to hold and handle, which will be discussed in more detail below.

The connection of the adapter device 14 with the socket 16 is made possible by the fact that the lip 56 elastically deformable in terms of the device axis 44 Radial direction is formed. One of the lip 56 , from the articular surface contact area 48 and the contact element 50 partially limited admission 60 the adapter device 14 can be radially expanded so that the implant edge 26 in the recording 60 introduced and to the plant to the investment element 50 can be brought. In a similar way, the recording 60 be widened to the adapter device 14 from the socket 16 to solve.

To handle the joint socket 16 , In particular for applying impact forces via the adapter device 14 on the socket 16 to be transferred, includes the Gelenkflächenkontaktbereich 48 a contact element 62 in the area of the distal end 42 , The contact element 62 has a contact surface 64 on, corresponding to the hollow spherical joint surface 24 the inner pan 21 is trained. Accordingly, the contact surface forms 64 a surface portion of the already mentioned, from the adapter device 14 defined contact sphere K for contacting the articular surface 24 ,

The contact surface 64 extends over a vertex area 66 the articular surface contact area 48 , about until 65 , Latitude of the contact sphere K. The contact surface 64 however, does not extend beyond one at the distal end 42 arranged vertex and in particular pole 68 the contact surface K, but annular around the vertex 68 around, namely about 65 , Latitude of the contact sphere K until about 80 , Latitude of the contact sphere K. From about 80 , Latitude of the contact sphere K to the vertex 68 is the contact surface 64 however, interrupted because the contact element 62 at the apex area 66 a central opening 70 having.

Overall, the contact element 62 approximately hub-shaped with through the device axis 44 defined axis. It extends from the contact surface 64 with a dimension approximately equal to half the radius of the contact sphere K in the proximal direction. Proximalseitig holds the contact element 62 with a ring wall 72 a recording room 74 one. The recording room 74 is distal from a ceiling wall 76 partially limited, one the opening 70 narrowing ring shoulder 78 formed.

At the proximal end is in the ring wall 72 a the device axis 44 surrounding ring groove 80 formed, which is a connecting device 82 the adapter device 14 forms for connection to a handling instrument.

In the opening 70 is a relative to the articular surface contact area 48 and in particular its contact element 62 axially displaceable release element 84 the adapter device 14 arranged. The release element 84 is plug-shaped, approximately mushroom-shaped, designed and has a distal contact surface 86 on. The contact surface 86 can be essentially gap-free to the contact surface 64 of the contact element 62 be attached, with the contact surface 86 the crown 68 until about 80 , Latitude of the contact sphere K is covered. The contact surface 86 further forms a surface portion of the contact surface K and thus is in continuous continuation of the contact surface 64 also to the hollow spherical joint surface 24 adapted when the release element 84 in the 2 and 4 shown holding position occupies.

The release element 84 includes one the contact surface 86 having head area 88 as well as the central opening 70 in the area of the annular shoulder 78 penetrating neck area 90 , The neck area 90 juts into the recording room 74 into and is divided into four identical, each spaced-apart neck area segments 92 , Between the neck area segments 92 is a cross-slotted recording 94 formed for receiving a handling instrument. At the neck area 90 is thus another connection device 96 arranged to connect the adapter device 14 , especially of the release element 84 , with a handling instrument.

The neck area segments 92 further comprise latching hooks, by means of which the release element 84 captive on the articular surface contact area 48 is held. Proximalseitig form the neck area segments 92 by latching noses 97 Stop members for limiting the range of motion of the release element 84 relative to the articular surface contact area 48 in the distal direction. For this purpose, the locking lugs 97 with the proximal side of the annular shoulder 78 interact (not shown).

The head area forms on the distal side 88 a stop member for limiting the range of movement of the release element 84 in the proximal direction with the distal side of the annular shoulder 78 can interact. Is the head area 88 at the ring shoulder 78 on, adds its contact surface 86 , as mentioned, gap-free to the contact surface 64 of the contact element 62 and lies on the contact sphere K ( 2 and 4 ).

The articular surface contact area 48 further comprises further contact elements, namely a plurality of identically formed contact elements 98 , The contact elements 98 connect the border area 46 with the hub-shaped contact element 62 from which they protrude radially and that is a central element 99 the articular surface contact area 48 forms. In total there are five contact elements 98 provided in the circumferential direction of the device axis 44 each cover an angular range of about 40 °. Between adjacent contact elements 98 are therefore spaces 100 arranged in the circumferential direction of the device axis 44 each cover an angular range of about 30 °.

Starting from the edge area 46 has each contact element 98 first a convex section 102 on to which a concave section 104 connects, the distal side with the contact element 62 connected is. Overall, thus has the Gelenkflächenkontaktbereich 48 in the distal direction, first the convex section 102 , then the concave section 104 and then again a convex and the contact element 62 defined section. Of these, a total of five convex sections 102 and five concave sections 104 provided, due to the five spaced-apart, approximately spoke-shaped contact elements 98 ,

Each contact element 98 points to the convex section 102 a contact surface 108 for contacting the articular surface 24 on. The contact surface 108 forms a portion of the surface of the contact sphere K. Between the lip 56 and the contact surface 108 near the edge area 46 is the recording 60 formed in which the implant rim 26 is arranged positively. This ensures the reliable connection of the adapter device 14 with the socket 16 in addition to the already mentioned connection by means of the lip 56 ,

The contact surface 108 extends substantially from the equatorial plane A to about 30 , Latitude of the contact sphere K. Then an outer surface gives way 110 of the concave section 104 with respect to the contact sphere K in the direction of the device axis 44 back. The outer surface 110 runs arcuately curved from approximately 30 , Latitude of the contact sphere K until about 65 , Latitude of the contact sphere K, from where the contact surface 64 starts. This is between the outer surface 110 and the articular surface 24 an annular space 112 educated.

The adapter device 14 is pre-assembled with the socket 16 delivered, so that a surgeon, the handling of the surgical system is facilitated. During implantation, it is not necessary to use the adapter device 14 first with the socket 16 connect, so that an operation step can be saved.

When factory connecting the adapter device 14 with the socket 16 becomes the implant rim 26 under elastic deformation of the adapter device 14 in the recording 60 introduced. The lip 56 snaps into the recess 34 on the outside pan 19 one, and the contact surfaces 28 and 52 get to each other to the plant. The articular surface contact area 48 dives into the area of the joint 24 limited cavity, wherein the contact element 62 , the release element 84 and the contact elements 98 each by means of their contact surfaces 64 . 86 respectively. 108 at the articular surface 24 issue. The adapter device 14 is thus reliable on the socket 16 held.

The adapter device 14 has a high versatility, because it can not be connected only to joint sockets that have a planar implant edge 26 like the socket 16 exhibit. It is also possible to connect to sockets in which the outer cup protrudes proximally over the inner socket, provided that the dimensions of the adapter device 14 such are the lip 56 externally placed over the implant edge of the socket and can be brought into engagement therewith.

Due to the structural design of the adapter device 14 However, it will be preferable, as in the case of the socket 16 with planar implant rim 26 Inserted provided socket. For given outer dimensions of the socket 16 can the range of motion of the in the joint socket 16 absorbed condyle be maximized.

To handle the joint socket 16 , in particular their implantation, can be a handling instrument 114 detachable with the contact element 62 be connected, the distal end portion 116 in 5 is shown schematically, via the connecting means 82 and 96 , The handling instrument 114 can for this purpose in the recording room 74 intervention. On the outside, it has an annular projection 118 on. The annular projection 118 can in the ring groove 80 the connection device 82 interlock positively to the handling instrument 114 relative to the adapter device 14 in the axial direction and perpendicular to the device axis 44 to secure.

A hollow shaft 120 of the handling instrument 114 bears distally the ring projection 118 , The handling instrument 114 further includes one in the hollow shaft 120 guided another shaft 122 , which is relative to the hollow shaft 120 is axially movable. The shaft 122 is distal in the form of a Phillips 124 designed to form-fit in the cross-slot-shaped receptacle 94 of the release element 84 intervene.

Is the handling instrument 114 with the adapter device 14 Connected, the surgeon can use the socket 16 in nominal position in Bring pelvic bone. In this case, the surgeon on the handling instrument 114 exert an axial impact force. The impact force is from the handling instrument 114 on the adapter device 14 transfer. Further, the impact force is particularly axially and substantially axially by means of the contact element 62 at the apex area 66 and the release element 84 in the area of the vertex 68 on the inner pan 21 transfer. This allows a reliable anchoring of the socket 16 on the pelvic bone. In addition, a support of the adapter device takes place 14 on the inner pan 21 over the contact surfaces 108 the contact elements 98 ,

As the adapter device 14 is formed elastically deformable overall, in particular of an elastically deformable plastic material, damage to the sensitive ceramic inner pan 21 avoided.

To release the adapter device 14 after implantation of the socket 16 can the release element 84 relative to the articular surface contact area 48 be moved axially and from the in the 2 and 4 shown holding position to be transferred to a release position, not shown. This is made possible, for example, by the fact that the shaft 122 of the handling instrument 114 in the distal direction relative to the hollow shaft 120 is acted upon with a dissolving force. The release element 84 can be over the contact area 86 at the articular surface 24 support. In contrast, the adapter device 14 otherwise with one of the socket 16 impinged away proximal force, through the hollow shaft 120 whose annular projection 118 in the ring groove 80 intervenes. When transferring the release element 84 in the release position reaches the lip 56 out of engagement with the implant rim 26 and snaps out of the recess 34 out. Subsequently, the adapter device 14 in the proximal direction of the socket 16 be removed.

The latching of the release element 84 with the contact element 62 prevents the release element 84 when loosening the adapter device 14 can get lost. The lip 56 By the way, it snaps out of the recess 34 out before the latches 97 the ring shoulder 78 to contact.

Also when loosening the adapter device 14 from the socket 16 it proves to be an advantage that the adapter device 14 is formed elastically deformable. The opposing forces, via the contact element 62 and the release element 84 on the inner pan 21 can act from this without damaging the articular surface in particular 24 be recorded.

Alternatively to the manner described above, the adapter device 14 also from the socket 16 be solved by the surgeon one or more contact elements 98 at the concave section 104 engages behind with a suitable instrument, such as a hook. The surgeon can move the instrument through one of the interstices 110 from proximal to distal in a space 112 between the concave section 104 and the inner pan 21 introduce. By pulling in the proximal direction, the instrument reaches the concave portion 104 to the plant. By another train can the lip 56 with the implant rim 26 disengaged and then the adapter device 14 from the socket 16 be removed.

The 6 to 9 , which will be discussed below, show a second preferred embodiment of a total reference numeral 150 occupied surgical system. The surgical system 150 includes a joint implant 152 and a releasably connectable with this second preferred embodiment of an adapter device according to the invention 154 ,

At the joint implant 152 it is a part of an artificial joint, namely a socket of an artificial hip joint. Features of the joint implant 152 that are the same or equivalent to features of the joint implant 12 are denoted by the same reference numerals.

In a corresponding manner are features of the adapter device 154 which are equal or equivalent to features of the adapter device 14 are denoted by the same reference numerals.

The with the adapter device according to the invention and with the surgical system according to the invention 10 achievable advantages can with the adapter device 154 and the surgical system 150 also be achieved. The following will discuss the main differences that the adapter device 154 relative to the adapter device 14 having.

As in particular from the 7 and 9 shows, the adapter device 154 also the articular surface contact area 48 on, the radially outside of the edge area 46 is surrounded and the the edge area 46 surmounted in the distal direction. The central element 99 the articular surface contact area 48 is designed as a hollow cylinder and coaxial with the device axis 44 aligned. The central element 99 extends proximally to the proximal end 40 the adapter device 154 , which protrudes slightly above the equatorial plane A. On the distal side, the central element points 99 an end face 156 on. The face 156 defines one perpendicular to the device axis 44 aligned plane, in which about the 60 , Latitude of the adapter device 154 defined contact sphere K lies.

The central element 99 is distal to proximal from a central opening 158 interspersed. Adjacent to the end face 156 is the opening 158 through a device axis 44 surrounding ring ledge 160 slightly narrowed, which in its function the ring shoulder 78 the adapter device 14 equivalent. Proximalseitig of the annular projection 160 is a recording room 162 the opening 158 arranged to receive the neck area 90 of the release element 84 , To the recording room 162 joins proximally with an internal thread 164 provided portion of the opening 158 which extends to its proximal end.

Proximalseitig goes the opening 158 into an expanding picture 166 over, at the proximal end 40 the adapter device 154 is formed. The recording 166 has a relative to the device axis 44 noncircular cross section. For example, the cross section is a polygonal cross section, in particular an eightfold polygonal cross section ( 8th ).

The release element 84 the adapter device 154 is with its articular surface contact area 48 and in particular its central element 99 latched and axially movable relative to this. The head area 88 of the release element 84 includes the contact surface 86 , The contact surface 86 extends when the release element 84 in the 9 shown holding position, over the vertex 68 the contact sphere K, where they are approximately up to their 60 , Latitude ranges. Only at the top 68 directly has the release element 84 a small recess 168 which forms a solid angle of about 4 ° of the contact sphere K, so that at the apex 68 even the contact surface 86 is interrupted in sections.

Proximalseitig the head area 88 flat on the face 156 of the central element 99 abut so that the end face 156 a proximal stop for the release element 84 formed. The ring protrusion 160 forms a stop for the locking lugs 97 of the release element 84 if this is relative to the articular surface contact area 48 moved in the distal direction.

Proximalseitig with respect to the release element 84 is in the opening 158 a release element loading element 170 arranged, which in the present case as a comprehensive external thread threaded pin 172 is designed. The grub screw 172 is with the internal thread 164 screwed and thereby relative to Gelenkflächenkontaktbereich 48 and relative to the release element 84 formed axially movable. Proximalseitig includes the grub screw 172 a recording 174 for a handling device (not shown) for the adapter device 154 , The recording 174 points perpendicular to the device axis 44 a polygonal cross-section, in particular a hexagonal section ( 8th ).

In the radial direction, the central element extends 99 approximately up to 35% to 40% of the radius of the adapter device 154 all in all. Radially from the central element 99 protruding comprises the Gelenkflächenkontaktbereich 48 a plurality of contact elements 176 that is the central element 99 with the border area 46 connect. In total there are five contact elements 176 provided in the circumferential direction of the device axis 44 each cover an angle of approximately 30 °. Adjacent contact elements 176 are each through a gap 178 separated in the circumferential direction of the device axis 44 covers an angle of approximately 40 °. The contact elements 176 are identical.

Each contact element 176 includes a contact surface 180 for contacting the articular surface 24 , Every contact surface 180 defines a portion of the adapter device 154 total defined contact sphere K, on which also the contact surface 86 of the release element 84 lies when its head area 88 at the frontal area 156 is applied.

The respective contact surface extends from approximately 30 , Latitude to about 60 , Latitude of the contact sphere K. The contact surface 86 of the release element 84 is in its holding position in this way gap-free to the respective contact surface 180 attached and a continuous continuation of the respective contact surface on the contact sphere K.

The investment element 50 at the edge 46 is in the circumferential direction of the device axis 44 divided radially inward sections into a plurality of investment segments 182 , In total, there are five investment segments 182 provided, each one of the contact elements 176 is assigned, from which it protrudes radially. Radial outside, ie the outer edge 58 adjacent, the abutment element 50 a circumferential ring segment 184 on. The ring segment 184 and the investment segments 182 are sized so that the ring segment 184 from the outside pan 19 formed portion of the proximal contact surface 28 can be applied and the investment segments 182 at the of the inner pan 21 formed portion of the proximal contact surface 28 can be present ( 9 ).

For handling the adapter device 154 may be a handling device 186 are used, which is also part of the surgical system 150 can be. The handling device 186 is in 6 in perspective in the with the system 150 connected condition and in the 7 and 9 shown in sections. Proximalseitig includes the handling device 186 a grip element 188 , starting from which a hollow shaft in the distal direction 190 extends. At the distal end, the hollow shaft comprises 190 a polygon 192 who is taking the picture 166 is adapted with polygonal cross-section and can be positively inserted into this.

Inside in the hollow shaft 190 is another shaft 194 axially displaceably guided, at the distal end of an external thread 196 having. The diameter of the shaft 194 is at the diameter of the opening 158 adjusted so that the shaft 194 in the opening 158 introduced and thus by means of co-operating threads 164 . 196 with the articular surface contact area 48 can be screwed.

Proximal is the shaft 194 with a proximal side of the handle element 188 arranged head 198 connected, over the on the shaft 194 can be acted upon.

As already mentioned, with the adapter device 154 the with the adapter device 14 achievable benefits are also achieved. For handling the adapter device 154 can the polygon 192 positively in the recording 166 be introduced. The shaft 194 can with the articular surface contact area 48 be screwed. The recording 166 and the polygon 192 serve to facilitate as anti-rotation elements. Together form the recording 166 and the internal thread 164 a connection device 167 for connecting the handling device 186 with the adapter device 154 ,

Is the handling device 186 on the adapter device 154 Adapted, this can be done with this preassembled joint implant 152 in desired position in the bone, especially in the pelvic bone brought. For example, by applying force to the head 158 can be a striking force on the handling device 186 and over this on the adapter device 154 be exercised. The impact force is on the contact elements 176 and the release element 184 on the articular surface 24 transfer. After anchoring the joint implant 152 in the bone, the screw connection between the shaft 194 and the articular surface contact area 48 be solved. Here are the recording 166 and the polygon 192 again as anti-rotation elements to facilitate the loosening of the screw connection.

The adapter device 154 can from the joint implant 152 be solved by then a release tool in the opening 158 inserted from proximal to distal and engaged with the set screw 172 is brought. By a screwing movement by means of the tool, the threaded pin 172 axially in the distal direction relative to the articular surface contact area 48 be moved until it releases the release element 84 contacted. By further screwing the threaded pin 172 can be a dissolving force on the release element 84 be exercised. This causes the release element 84 relative to the articular surface contact area 84 moved and from the in 9 shown holding position in the release position (not shown) is transferred. As already above the example of the adapter device 14 explained, the retaining element 54 thereby disengaged from the wall section 36 the outer pan 19 brought and the adapter device 154 from the joint implant 152 be solved. The use of the threaded pin 172 for moving the release element 84 offers the advantage that this in small, finely graded steps relative to Gelenkflächenkontaktbereich 48 can be moved. This allows the adapter device 154 especially gentle on the joint implant 152 to solve.

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• FR 2911062 B1 [0003, 0010]
• EP 0216794 B1 [0006]

Claims (48)

Surgical adapter device for a hollow spherical articular surface ( 24 ) and on the proximal side an implant rim ( 26 ) having joint implant ( 12 ; 152 ), which has an implant axis ( 30 ) defines which adapter device ( 14 ; 154 ) one with the implant axis ( 30 ) alignable device axis ( 44 ) and a border area ( 46 ) and a Gelenkflächenkontaktbereich ( 48 ), wherein the edge region ( 46 ) radially outside the articular contact area ( 48 ) is arranged and at the edge area ( 46 ) a connection device ( 49 ) for detachably connecting the adapter device ( 14 ; 154 ) with the implant rim ( 26 ), and wherein the articular surface contact area ( 48 ) in the distal direction the edge region ( 46 ) and at least one contact surface ( 64 . 108 ; 180 ) for contacting the articular surface ( 24 ) having contact element ( 62 . 98 ; 176 ), characterized in that the connecting device ( 49 ) At least one of the edge area ( 46 ) projecting in the distal direction retaining element ( 54 ) for application to an outer wall ( 36 ) of the joint implant ( 12 ; 152 ) and that between the at least one retaining element ( 54 ) and the articular surface contact area ( 48 ) at least one recording ( 60 ) for at least partially receiving the implant edge ( 26 ) is formed. Adapter device according to claim 1, characterized in that the at least one retaining element ( 54 ) in the distal direction in the direction of the device axis ( 44 ) is inclined or inclined. Adapter device according to claim 1 or 2, characterized in that the at least one retaining element ( 54 ) is formed elastically deformable in the radial direction. Adapter device according to one of the preceding claims, characterized in that the at least one retaining element ( 54 ) in the circumferential direction of the device axis ( 44 ) is formed closed in itself. Adapter device according to one of the preceding claims, characterized in that the at least one retaining element ( 54 ) is designed lip-shaped. Adapter device according to one of the preceding claims, characterized in that the at least one retaining element ( 54 ) on an outer edge ( 58 ) of the adapter device ( 14 ; 154 ) is arranged. Adapter device according to one of the preceding claims, characterized in that the connecting device ( 49 ) at least one contact surface ( 52 ) bearing element ( 50 ) for application to the implant edge ( 26 ), which is radially less far from the device axis ( 44 ) is spaced as the at least one retaining element ( 54 ). Adapter device according to claim 7, characterized in that the at least one contact surface ( 52 ) is planar. Adapter device according to claim 7 or 8, characterized in that the at least one contact surface ( 52 ) one perpendicular to the device axis ( 44 ) aligned plane (A). Adapter device according to one of claims 7 to 9, characterized in that the at least one contact surface ( 52 ) in the circumferential direction of the device axis ( 44 ) is coherent in itself. Adapter device according to one of the preceding claims, characterized in that the edge region ( 46 ) proximal end to the adapter device ( 14 ; 154 ) is arranged. Adapter device according to one of the preceding claims, characterized in that the adapter device ( 14 ; 154 ) is formed elastically deformable. Adapter device according to one of the preceding claims, characterized in that the adapter device ( 14 ; 154 ) is cup-shaped or substantially cup-shaped. Adapter device according to one of the preceding claims, characterized in that the contact surface ( 64 . 108 ; 180 ) of the at least one contact element ( 62 . 98 ; 176 ) at least in sections the surface of one of the adapter device ( 14 ; 154 ) forms a defined contact sphere (K). Adapter device according to claim 14, characterized in that the connecting device ( 49 ) at least one contact surface ( 52 ) bearing element ( 50 ) for application to the implant edge ( 26 ) defining an equatorial plane (A) of the contact sphere (K). Adapter device according to one of the preceding claims, characterized in that the contact surface ( 108 ) at least one contact element ( 98 ) to the edge area ( 46 ) or substantially to the edge area ( 46 ) adjoins. Adapter device according to one of the preceding claims, characterized in that at least one contact element ( 98 ) Is configured concave at least in sections. Adapter device according to one of the preceding claims, characterized in that the adapter device ( 14 ; 154 ) a vertex on the distal side ( 68 ) is defined or defined, over which the contact area ( 64 ) of a contact element ( 62 ) or the contact area ( 64 ) of a contact element ( 62 ) surrounds. Adapter device according to claim 18, characterized in that a concave section ( 104 ) at least one contact element ( 98 ) to the contact element ( 62 ) whose contact surface extends over the vertex or surrounds the vertex. Adapter device according to one of the preceding claims, characterized in that the Gelenkflächenkontaktbereich ( 48 ) exactly one contact element ( 62 . 98 ; 176 ). Adapter device according to one of claims 1 to 19, characterized in that the Gelenkflächenkontaktbereich ( 48 ) several contact elements ( 62 . 98 ; 176 ). Adapter device according to claim 21, characterized in that two or more contact elements ( 98 ; 176 ) in the circumferential direction of the device axis ( 44 ) each occupy a limited angular range and are spaced from each other. Adapter device according to claim 22, characterized in that the two or more contact elements ( 98 ; 176 ) are evenly spaced from each other. Adapter device according to claim 22 or 23, characterized in that the two or more contact elements ( 98 ; 176 ) are formed identically. Adapter device according to one of claims 22 to 24, characterized in that the two or more contact elements ( 98 ; 176 ) are configured spoke-shaped. Adapter device according to one of claims 22 to 25, characterized in that the Gelenkflächenkontaktbereich ( 48 ) a central element ( 99 ), from which the two or more contact elements ( 98 ; 176 ) protrude in the radial direction. Adapter device according to claim 26, characterized in that the central element ( 99 ) is designed hub-shaped. Adapter device according to one of the preceding claims or according to the preamble of claim 1, characterized in that the articular surface contact area ( 48 ) at least one opening ( 70 ; 158 ) and that in the at least one opening ( 70 ; 158 ) relative to the articular surface contact area ( 48 ) movable release element ( 84 ), the distal side a contact surface ( 86 ) for contacting the articular surface ( 24 ) having. Adapter device according to claim 28, characterized in that the release element ( 84 ) relative to the articular surface contact area ( 48 ) is axially movable. Adapter device according to claim 28 or 29, characterized in that the release element ( 84 ) relative to the articular surface contact area ( 48 ) is displaceable. Adapter device according to one of claims 28 to 30, characterized in that the adapter device ( 14 ; 154 ) at least one stop member ( 78 . 88 . 92 . 97 ; 156 . 160 ) comprises for limiting the movement of the release element ( 84 ) and the articular surface contact area ( 48 ) relative to each other. Adapter device according to one of claims 28 to 31, characterized in that the release element ( 84 ) captive on the articular surface contact area ( 48 ) is held. Adapter device according to one of claims 28 to 32, characterized in that a central opening ( 70 ; 158 ) is provided. Adapter device according to one of claims 28 to 33, characterized in that the adapter device ( 14 ; 154 ) a vertex on the distal side ( 68 ) is defined or defined, over which the contact area ( 86 ) of the release element ( 84 ) or the contact area ( 86 ) of the release element ( 84 ) surrounds. Adapter device according to one of claims 28 to 34, characterized in that the contact surface ( 86 ) of the release element ( 84 ) gap-free or substantially gap-free to the contact surface ( 64 ; 180 ) at least one contact element ( 62 ; 176 ) of the articular surface contact area ( 48 ) is attached. Adapter device according to one of claims 28 to 35, characterized in that the contact surface ( 86 ) of the release element ( 84 ) an outer contour of the contact surface ( 64 ; 180 ) of the at least one contact element ( 62 ; 176 ) continues steadily. Adapter device according to one of claims 28 to 36, characterized in that the release element ( 84 ) is designed plug-shaped. Adapter device according to one of claims 28 to 37, characterized in that the adapter device ( 14 ) apart from the release element ( 84 ) is integrally formed. Adapter device according to one of claims 28 to 38, characterized in that the release element ( 84 ) for detachably connecting it to a handling instrument ( 114 ) for the adapter device ( 14 ) a first connection device ( 96 ). Adapter device according to one of claims 28 to 39, characterized in that the at least one opening ( 158 ) with an internal thread ( 164 ) is provided. Adapter device according to one of claims 28 to 40, characterized in that in the at least one opening ( 158 ) relative to the articular surface contact area ( 48 ) and relative to the release element ( 84 ) movable release element loading element ( 170 ) is arranged. Adapter device according to one of the preceding claims, characterized in that the Gelenkflächenkontaktbereich ( 48 ) a second connection device ( 82 ; 167 ) for detachably connecting it to a handling instrument ( 114 ; 186 ) for the adapter device ( 14 ; 154 ). Adapter device according to claim 42, characterized in that the second connecting device ( 82 ) one the device axis ( 44 ) surrounding annular groove ( 78 ) having. Adapter device according to claim 42 or 43, characterized in that the second connecting device ( 82 ) an anti-rotation element ( 166 ) with a perpendicular to the device axis ( 44 ) non-circular cross-section. Surgical system comprising a joint implant ( 12 ; 152 ) with a hollow spherical joint surface ( 24 ) and a proximal implant edge ( 26 ), which joint implant ( 12 ; 152 ) an implant axis ( 30 ) and an adapter device ( 14 ; 154 ) with the joint implant ( 12 ; 152 ) is releasably connectable, characterized in that the adapter device ( 14 ; 154 ) an adapter device ( 14 ; 154 ) according to any one of the preceding claims. System according to claim 45, characterized in that the adapter device ( 14 ; 154 ) on the joint implant ( 12 ; 152 ) is pre-assembled. System according to claim 45 or 46, characterized in that the joint implant ( 12 ; 152 ) one the articular surface ( 24 ) component ( 21 ) of a ceramic material. System according to one of claims 45 to 47, characterized in that the joint implant ( 12 ; 152 ) an acetabular cup ( 16 ).

Images