DE202022101634U1 - Femoral Implant and Femoral Implant Set - Google Patents

Abstract

Femoral implant (104; 204) for forming a femoral component (201) of a transcutaneous implant (200), in particular for use with an exo-knee joint, the femoral implant (104; 204) comprising a stem part arrangement (104; 204), which can be anchored in a femoral bone stump (F), characterized in that the stem part arrangement (104; 204) has at least one attachment opening (142; 242) which is located in a proximal region (140; 226) of the stem part arrangement (104; 204) and which is designed to allow a femoral neck endoprosthesis (108; 208) to be attached to the stem part arrangement (104; 204) when the stem part arrangement (104; 204) is embedded in a femoral bone stump (F) is anchored.

Description

The application relates to a femoral implant for forming a femoral component of a transcutaneous implant, particularly for use with an exo-knee joint. The application also relates to a femoral implant set.

Technical background

Leg prostheses are typically used after the loss of a leg part, for example as a result of illness, an accident or the effects of violence. They serve to make the functions of the lost body part available to the person concerned, at least in part, or to replace them.

Transcutaneous implants, among other things, are known for attaching a leg or knee prosthesis to the thigh stump after a leg part loss. These include a femoral component that is secured within the patient's femoral bone stump. An arrangement of bridge and connection elements is provided underneath the femur component, which protrudes through the patient's skin to the outside of the body and allows an external, so-called exo-knee prosthesis to be attached there.

In order to fasten the femoral component in the femoral bone stump, in known systems it comprises a femoral implant which is anchored in the medullary cavity of the femoral bone stump. In order to achieve a stable fixation and a favorable transmission of loading forces between the bone and the femoral implant, the femoral implant is designed essentially in the shape of a stem, corresponding to the medullary cavity; it is therefore also called the "handle part". Before the stem part is introduced, the femoral bone stump is also shortened to the intended length, if necessary.

An increased risk of fracture in the femoral skeleton above the femoral implant has been shown in some patients. The region of the femoral neck is particularly affected. Treatment in such cases traditionally consists of implanting a femoral neck screw. This is typically introduced into the bone from laterally above the femoral implant and essentially parallel to an axis of the femoral neck.

In addition, it is known to use a plate implant attached outside of the femur in patients with a femur implant in the event of a hip operation that becomes necessary later, instead of a stem of an artificial hip joint that is otherwise conventionally introduced into the femur.

Based on this, a technique is desirable which enables improved support of the femoral neck and improved attachment of an artificial hip joint for patients with a femoral implant.

outline of the invention

A femoral implant according to claim 1 and a femoral implant set according to claim 12 are therefore presented.

According to a first aspect, a femoral implant for forming a femoral component of a transcutaneous implant, particularly for use with an exo-knee joint, is presented. The femoral implant includes a stem assembly that is anchorable in a femoral bone stump. The stem assembly has at least one attachment opening disposed in a proximal region of the stem assembly and configured to allow attachment of a femoral neck endoprosthesis to the stem assembly when the stem assembly is anchored in a femoral stump is.

The femoral neck endoprosthesis can include a femoral neck screw for stabilizing the femoral neck or can be designed as such. The femoral neck endoprosthesis can comprise a shaft of an artificial hip joint or be designed as such. The femoral neck endoprosthesis can comprise a combination of a femoral neck screw and a shaft of an artificial hip joint or be designed as such. In a preferred embodiment, the attachment opening is configured to allow support forces to be transmitted between the femoral neck endoprosthesis and the stem assembly. A supporting effect by means of the femoral neck endoprosthesis and the stem part arrangement can be promoted as a result.

In a further preferred embodiment, the attachment opening is designed to allow insertion of the femoral neck endoprosthesis at least partially through the attachment opening, in particular from the lateral direction. This can facilitate insertion of the femoral neck endoprosthesis at any time after the stem part arrangement has been anchored in a femur bone stump.

The stem assembly can include a stem body that extends at least substantially over an entire length of the stem assembly. The attachment opening can be arranged in a proximal area of the handle part base body.

Alternatively, the handle part arrangement can comprise at least one handle part main body and at least one bridge module, which can be connected to the handle part main body in a longitudinal extension direction of the handle part arrangement. The attachment opening can be arranged in the bridge module.

The bridge module may be configured such that the attachment opening is located in a designated area with respect to a femoral neck of the femoral bone stump when the stem assembly is anchored in accordance with a designated position with respect to a distal end of the femoral bone stump.

The location and position of the bridging module and the handle part base body can be fixed relative to one another. For example, an additional lateral fixation hole and a fixation screw or fixation pin that can be introduced into it can be provided. In this way, a relative movement between the handle part base body and the bridge module can be reliably prevented after assembly.

In addition or as an alternative, the location and position of the femoral neck endoprosthesis and the stem part arrangement can be fixable relative to one another. For example, in the proximal area of the handle part arrangement, in particular in the proximal area of the bridging module, parallel to the direction of longitudinal extent, in particular coaxially, an additional fixation bore and a fixation screw or fixation pin that can be inserted therein can be provided. In this way, a relative movement between the femoral neck endoprosthesis and the stem part arrangement can be reliably prevented after assembly.

In preferred embodiments, the handle part arrangement can thus have a modular, multi-part structure. Alternatively, the stem assembly may be of unitary construction and may be provided in a variety of lengths.

The handle part arrangement can have a size in the range of 120 millimeters to 200 millimeters, preferably in the range of 140 millimeters to 180 millimeters, in a longitudinal extension direction.

The attachment opening may be configured to transmit loading forces between a femoral neck endoprosthesis and the stem assembly. The attachment opening may include a bore extending through the stem subassembly. The attachment opening can be oriented with respect to a longitudinal axis of the stem part assembly in such a way that it allows attachment of the femoral neck endoprosthesis to the stem part assembly at least substantially according to a femoral neck angle. The attachment opening can be at an angle with respect to the longitudinal axis of the stem part assembly in the range of 105 degrees to 155 degrees, preferably 115 degrees to 150 degrees, preferably 130 degrees to 145 degrees, preferably in the range of 135 degrees to 140 degrees.

In particular, due to the possible modular structure, the arrangement that is suitable in terms of length and/or angle can be provided for the respective patient. This allows the femoral implant to be implanted in the patient such that the apex of the angle between the attachment opening and the longitudinal axis of the stem assembly can be located substantially or exactly at the apex of the femoral neck angle (CCD angle).

The attachment opening can be designed to allow at least part of the femoral neck endoprosthesis to be passed through the stem part arrangement, in particular from the side.

The attachment opening can have a diameter in the range of 6 millimeters to 15 millimeters, preferably in the range of 8 millimeters to 12 millimeters.

According to another aspect, a femoral implant set is presented. The femoral implant set includes at least one femoral implant of the type presented here.

Additionally or alternatively, the femoral implant set comprises at least one femoral neck endoprosthesis, which can be attached to the stem part arrangement by means of the attachment opening of the stem part arrangement of the at least one femoral implant.

Additionally or alternatively, the stem part arrangement of the femoral implant of the femoral implant set comprises at least one stem part main body and at least one bridge module that can be connected to the stem part main body in a longitudinal extension direction of the stem part arrangement. The femoral implant set comprises a plurality of bridging modules which can be optionally connected to the at least one stem part base body and which each have an attachment opening and a bridging module connection section for connecting the bridging module to the stem part base body, with the bridging modules relating to at least one of a distance between the attachment opening and the bridge module connection section, an orientation of the attachment opening with respect to a longitudinal axis of the stem part assembly, and a diameter of the attachment opening.

Additionally or alternatively, the stem part arrangement of the femoral implant of the femoral implant set comprises at least one stem part main body and at least one bridge module that can be connected to the stem part main body in a longitudinal extension direction of the stem part arrangement. The femoral implant set comprises a plurality of stem part base bodies that can be selectively connected to the at least one bridge module, the stem part base bodies being different in terms of size in a direction of longitudinal extension of the stem part arrangement.

The femoral neck endoprosthesis can be configured to reinforce a femoral neck and/or to attach at least part of a hip endoprosthesis to the femoral neck endoprosthesis when the femoral implant is anchored in a femoral bone stump.

In particular, the femoral neck endoprosthesis can comprise a femoral neck screw. The attachment opening can include a bore, and the femoral neck screw can have a thread in a medial section and a cylindrical profile in a lateral section.

Features, advantages and technical effects that were described above only in relation to the femoral implant can apply accordingly to the femoral implant set and vice versa.

character list

• 1 bis 3 Femurimplantat-Sets umfassend jeweils wenigstens ein Femurimplantat, gemäß verschiedenen Beispielen;
• 4 ein Brückenmodul und eine Schenkelhals-Endoprothese eines Femurimplantat-Sets, gemäß einem weiteren Beispiel;
• 5A einen Femurknochenstumpf mit darin verankertem Stielteil herkömmlicher Art; und
• 5B einen Femurknochenstumpf mit Bezugsmerkmalen zum Auswählen bzw. Konfigurieren einer Stielteil-Anordnung, gemäß einem Beispiel.

Other features, advantages and objects of the invention will be apparent from the drawings and detailed description. Show it:

• 1 until 3 Femoral implant sets each comprising at least one femoral implant, according to various examples;
• 4 a bridge module and a femoral neck endoprosthesis of a femoral implant set according to another example;
• 5A a femoral stump with a stem portion of conventional type anchored therein; and
• 5B a femoral bone stump having datums for selecting or configuring a stem portion assembly, according to an example.

Detailed description

1 10 shows a schematic and exemplary femoral implant set 100. The femoral implant set 100 includes a femoral implant 104 in the form of a stem assembly for forming a femoral component of a transcutaneous implant particularly intended for use with an exo-knee joint. The femoral implant 104 is designed for this purpose for implantation in the medullary canal of a femoral bone stump, similar to the stem portion of conventional systems.

In the example shown, the handle part arrangement 104 comprises a handle part main body 120 and a bridge module 140. The handle part main body 120 and the bridge module 140 can be connected in a longitudinal extension direction of the handle part arrangement 104. For this purpose, the bridging module 140 has a bridging module connection section 144 at a distal end. This can be connected to a base body connecting section 128 which is arranged in a proximal area 126 of the handle part base body 120 . In the connected state, the stem part base body 120 is arranged in a distal area of the stem part arrangement 104 and the bridge module 140 is arranged in a proximal area of the stem part arrangement 104 .

In a distal area 122 of the handle part base body, the latter has a connection cone 124 . The connector cone 124 is used to attach an assembly of bridging and ligating members that protrude through the patient's skin and allow attachment of a prosthetic leg or knee when the stem assembly 104 is anchored in a femoral stump. In order to encourage the stem part arrangement 104 to grow together with the bone, the steep part base body 120 has a spongy surface structure 130 on its lateral surface, here a three-dimensional interconnecting spatial structure.

The above-described functions of the stem assembly 104 are substantially similar to those of a conventional, typically one-piece, stem for forming a femoral component of a transcutaneous implant.

The stem assembly 104 has an attachment opening 142 in the area of the bridge module 140 . In the example shown, the attachment opening 142 is configured as a bore that extends through the bridge module 140 at an angle to the longitudinal axis of the stem part arrangement 104 .

The femoral implant set 100 also includes a femoral neck endoprosthesis 108 . This can be attached to the stem part arrangement 104 by means of the attachment opening 142 .

The femoral implant assembly 100 allows for the attachment of a femoral neck stent 108 to the stem assembly 104 via the attachment opening 142. This facilitates the creation of a coherent structure more supportive implants inside the bone. The attachment opening 142 also allows an advantageous placement of the femoral neck endoprosthesis 108, for example along a central axis of the femoral neck. The attachment opening 142 also allows the femoral neck endoprosthesis 108 to be introduced from the lateral direction into the femoral neck after the stem part arrangement 104 has been anchored in the femoral bone stump.

When the stem part arrangement 104 is introduced into the bone, for example, the attachment opening 142 is already suitably positioned and aligned. If, for example, a reinforcement of the femoral neck and/or support for an artificial hip joint is required later, a corresponding femoral neck endoprosthesis, in particular a Insert a femoral neck screw or a shaft of an artificial hip joint from the outside, in particular from the side, through the attachment opening 142 and attach it to the stem part arrangement 104 . An originally effected anchoring of the stem part arrangement 104 in the bone does not have to be loosened, for example.

In the example shown by 1 the femoral neck endoprosthesis includes a femoral neck screw 160. This has a thread 162 in an area that corresponds to a medial end of the femoral neck screw 160. In contrast, a lateral section of the femoral neck screw 160 lying opposite the thread 162 has a cylindrical profile 164 .

The cylindrical profile 164, in conjunction with the bore 142, allows the thread 162 to be screwed into the femoral neck by turning the femoral collar screw 160 relative to the stem part arrangement 104. In addition, the cylindrical profile 164, in conjunction with the bore 142, allows support forces to be transmitted between the femoral collar screw 160 and the handle part arrangement 104 by means of a positive fit after the femoral collar screw 160 has been inserted.

In some examples, the threads 162 of the femoral head screw 160 also permit attachment of a hip replacement while being connected and supported to the stem assembly 104 by the femoral head screw.

The modular design of the stem assembly 104 in the example of FIG 1 facilitates adaptation of the stem assembly 104 to different femur geometries and applications.

For example, the handle body 120 is selectively connectable to various bridging modules 140 that differ in terms of a distance between the attachment opening 142 and the bridging module connection portion 144 . This allows the stem assembly 104 to be accommodated to different bone lengths, for example, according to a distance between a designated area for implantation of the stem body 120 relative to a distal end of the femoral bone stump and a designated area for the attachment opening 142 relative to the femoral neck.

Additionally or alternatively, in further examples, different bridge modules 140 differ with regard to an orientation of the attachment opening 142 relative to the longitudinal axis of the stem part arrangement 104. This allows, for example, an adaptation of the stem part arrangement 104 to different femoral neck angles. A femoral neck angle typically ranges between 135 degrees and 145 degrees. Different bridge modules 140 have, for example, different orientations of the attachment opening 142 in the range between 130 degrees and 150 degrees.

Additionally or alternatively, in further examples, different bridge modules 140 differ with respect to a diameter of the attachment opening 142. This allows, for example, the stem part assembly 104 to be adapted to different sizes of femoral neck endoprosthesis according to different applications. Different bridge modules 140 have, for example, different diameters of the attachment opening 142 in the range between 6 and 15 millimeters.

Additionally or alternatively, in some examples, a bridging module 140 can be connected to various handle part base bodies 120 that differ in terms of a length in the longitudinal direction of the handle part arrangement, for example in terms of a distance between the connecting cone 124 and the base body connecting section 128. This allows the stem assembly 104 to be accommodated to different bone lengths, for example, according to a distance between a distal end of the femoral bone stump and a designated area for the body connecting portion 128 with respect to a proximal topology of the femoral bone stump.

2 shows schematically and by way of example a transcutaneous implant 200 which is anchored in a thigh stump. The transcutaneous implant 200 comprises a femoral component 201 and an attached bridging element assembly 202 which protrudes through the skin of the thigh stump, particularly for attachment of an exo-knee prosthesis or a limb prosthesis. The femoral component 201 comprises a femoral implant set having a stem assembly 204 and a femoral neck endoprosthesis 208 connected to stem assembly 204 by means of an attachment opening 242 in a proximal region 226 thereof.

For the stem part arrangement 204 and the femoral neck endoprosthesis 208, the above applies to the stem part arrangement 104 and the femoral neck endoprosthesis 108 in 1 What has been said accordingly, unless otherwise stated in the following. In particular, the stem assembly 204 is anchored in the femoral bone stump F and has a distal portion 222 that is provided for attachment of the assembly 202 of bridging members. Furthermore, the attachment opening 242 is located in a proximal region 226 of the stem assembly 204 . In addition, the femoral neck endoprosthesis 208 also includes a femoral neck screw 260 having a thread 262 located in a medial portion of the femoral neck screw 260 and a cylindrical profile 264 located in a lateral portion of the femoral neck screw 260 .

The femoral neck screw 260 is inserted into the femoral neck S at an angle W with respect to the longitudinal axis L of the stem assembly 204 according to an orientation of the attachment opening 242 . The femoral neck screw 260 is arranged along the femoral neck axis H of the femoral neck S. A position of the attachment opening 242 in relation to the femur bone stump F corresponds at least approximately to an intersection of the femoral neck axis H and the longitudinal axis L of the stem part arrangement 204.

Deviating from the example in 1 In some examples, the stem assembly 204 includes a stem body 220 that extends at least substantially an entire length of the stem assembly 204 . In some examples, the stem part arrangement 204, unlike the stem part arrangement 104, includes in 1 no bridge module. The attachment opening 242 is arranged in a proximal area 226 of the handle part base body 220 . The handle part arrangement 204 is also selected, for example, for a present application from a plurality of handle part arrangements 204 that differ in terms of length. Additionally or alternatively, in further examples, the stem portion assembly 204 is selected from a plurality of stem portion assemblies 204 that vary in terms of an orientation of the attachment opening 242 according to various angles W, a diameter of the attachment opening 242, and/or a spacing of the attachment opening 242 from at least one of a proximal end and a distal end of the stem assembly 204 are different.

In the example shown, the femoral component 201 of the transcutaneous implant 200 includes a femoral implant set with a stem arrangement 204 and a femoral neck endoprosthesis 208. In some examples, the femoral component 201 includes other components of the transcutaneous implant 200, which are shown in 2 are not shown. These are rigidly connected, for example, to the stem part arrangement 204 and serve, for example, to anchor the stem part arrangement 204 in the femoral bone stump F and/or to connect the stem part arrangement 204 to the arrangement 202 of bridge or connection elements. In an example other than that shown, a femoral component of an implanted transcutaneous graft of the type presented herein comprises a stem assembly without a femoral neck endoprosthesis attached. A femoral neck endoprosthesis can, for example, be implanted at a later point in time and thus be added to the femur component of the transcutaneous implant.

3 shows a femoral implant set 300 schematically and by way of example. The femoral implant set 300 comprises at least one femoral implant with a stem part base body 320 according to one of the above in connection with 1 and 2 described examples.

In examples of the femoral implant set 300, in which the stem part main body 320 extends at least essentially over the entire length of the stem part arrangement and has an attachment opening at a proximal end, the femoral implant set 300 also comprises at least one further stem part main body 321, which differs from the stem portion body 320 in an overall length, an orientation of the attachment hole, and/or a diameter of the attachment hole. In further examples, the femoral implant set 300 comprises at least one femoral neck endoprosthesis 360, 361, which is intended for attachment to the at least one stem part base body 320, 321 by means of the attachment opening of the at least one stem part base body 320, 321. For example, femoral implant set 300 includes a plurality of femoral neck endoprostheses 360, 361 that differ from one another in diameter, length, and/or function, such as supporting a femoral neck and/or attaching an artificial hip joint to a medial portion of the femoral neck -Endoprosthesis 360, 361.

In examples of the femoral implant set 300, in which the stem part body 320 to connect tion is configured with a bridging module 340, 341, which has an attachment opening for attaching a femoral neck endoprosthesis, femoral implant set 300 also comprises at least one bridging module 340. Femoral implant set 300 also comprises at least one additional stem part base body 321 , which differs from the handle part base body 320 with regard to a length, at least one further bridging module 341 which differs from the bridging module 340 with regard to a distance of the attachment opening from the bridging module connection section, an orientation and/or a diameter of the attachment opening, and/or or at least one femoral neck endoprosthesis 360, 361 which is intended for attachment to the at least one bridge module 340, 341 by means of the attachment opening of the bridge module 360, 361.

4 shows schematically and by way of example a bridge module 440 and a femoral neck endoprosthesis 460 according to a further example. Unless otherwise stated below, what was described above in connection with a bridge module and a femoral neck endoprosthesis applies accordingly to the bridge module 440 and the femoral neck endoprosthesis 460 .

The bridge module 440 also includes an attachment opening 442 . In the arrangement shown, the femoral neck endoprosthesis 460 is received in the attachment opening 442 . The attachment opening 442 includes a bore that extends through the bridging module 440 and that is oriented obliquely with respect to or transverse to a longitudinal direction of the bridging module. The bridging module also includes a bridging module connection section 444 for connecting the bridging module 440 to a stem part body. In the bridge module 440, the bridge module connection portion 444 has a groove.

The femoral neck endoprosthesis 460 has a thread 462 in the medial section. This is, for example, a metric thread, for example for screwing to a part of an artificial hip joint. The femoral neck endoprosthesis 460 has a cylindrical profile 464 in a laterally adjoining section. The cylindrical profile 464 is used, for example, for the rotatable, form-fitting accommodation of the femoral neck endoprosthesis 460 in the attachment opening 442.

Deviating from the examples described above, the femoral neck endoprosthesis 460 also has a further thread 466 in an end section which laterally adjoins the cylinder profile 464 . The further thread 466 can be provided in some examples in order to screw the femoral neck endoprosthesis 460 to the bridge module 440 in the area of the attachment opening 442 and/or to bone that laterally surrounds the bridge module 440 when the femoral neck endoprosthesis 460 is in the inserted state effect.

In some examples, the bridging module 440 also includes an additional fixation hole in the proximal area and a fixation screw or fixation pin 446 that can be introduced into it. By means of the additional fixation bore and the fixation screw or fixation pin 446 that can be inserted therein, a relative movement between the femoral neck endoprosthesis 460 and the stem part arrangement can be reliably prevented after assembly. This applies in particular to examples in which the femoral neck endoprosthesis 460 does not have a thread 466 by means of which it is screwed to the bridge module 440 in the region of the attachment opening 442 in the inserted state.

5A shows schematically and by way of example a stem part 520 of the conventional type described at the outset, which is anchored in a femoral bone stump F. As shown in 5A As can be seen, the stem part 520 is arranged significantly below the femoral neck S when the femoral bone stump F is of an intended length. In particular, the stem part 520 does not extend in the proximal direction to a geometric point of intersection of a longitudinal axis of the stem part 520 and a femoral neck axis of the femoral neck S, the geometric point of intersection corresponding in particular to the central point of the CCD, i.e. centrum-collum-diaphyseal, angle.

5B shows schematically a femoral bone stump F. Geometric features are drawn therein diagrammatically, which advantageously serve as reference values for a selection or for a configuration of a stem part arrangement of the type presented.

The longitudinal axis L of the handle part arrangement to be used is shown. The axis L also corresponds at least approximately to an axis of the femoral shaft. The femoral neck axis H is also shown. This intersects the axis L at the point P. The axis L and the femoral neck axis H run at an angle W to one another, which corresponds at least approximately to the CCD angle. The point P corresponds at least approximately to the central point of the CCD angle. The angle W is on the lower of the two media len sectors of the intersecting axes H, L related. In addition, the resection reference point R for a resection of the femur bone stump to form the distal end D according to an intended bone shaft length, for example at a distance of 170 millimeters from the resection reference point R, is shown.

On the basis of the aforementioned sizes, a handle part arrangement of the type presented is preferably selected in terms of length or configured by a suitable combination of a handle part main body and at least one bridge module in such a way that after a planned anchoring of the handle part arrangement in relation to the distal end D of the femoral bone stump F the attachment opening is located in an area which is as close to the point P as possible. The stem part arrangement is also preferably selected or configured in such a way that the attachment opening is aligned as closely as possible along the femoral neck axis H after the stem part arrangement has been anchored in the femur bone stump F.

Claims (15)

Femoral implant (104; 204) for forming a femoral component (201) of a transcutaneous implant (200), in particular for use with an exo-knee joint, the femoral implant (104; 204) comprising a stem part arrangement (104; 204), which can be anchored in a femoral bone stump (F), characterized in that the stem part arrangement (104; 204) has at least one attachment opening (142; 242) which is located in a proximal region (140; 226) of the stem part arrangement (104; 204) and which is designed to allow a femoral neck endoprosthesis (108; 208) to be attached to the stem part arrangement (104; 204) when the stem part arrangement (104; 204) is embedded in a femoral bone stump (F) is anchored. femoral implant after claim 1 , wherein the handle part arrangement (104) has at least one handle part base body (120; 320, 321) and at least one bridge module (140; 340, 341) which is connected to the handle part base body (120; 320, 321) in a longitudinal extension direction of the Stem assembly (104) is connectable, includes. femoral implant after claim 2 wherein the attachment opening (142) is arranged in the bridge module (140; 340, 341). femoral implant after claim 3 , wherein the bridge module (140; 340, 341) is designed in such a way that the attachment opening (142) is arranged in a predetermined area in relation to a femoral neck (S) of the femoral bone stump (F) when the stem part arrangement (104; 204 ) is anchored according to an intended position with respect to a distal end of the femoral bone stump. Femur implant according to one of the preceding claims, wherein the stem part arrangement (104; 204) has a length in a longitudinal direction in the range from 120 millimeters to 200 millimeters, preferably in the range from 140 millimeters to 180 millimeters. The femoral implant of any preceding claim, wherein the attachment opening (142; 242) is configured to transmit loading forces between a femoral neck stent (108; 208) and the stem assembly (104; 204) when the femoral neck stent (108; 208) is attached to the stem assembly (104; 204) via the attachment aperture (142; 242). The femoral implant of any preceding claim, wherein the attachment opening (142; 242) comprises a bore extending through the stem assembly (104; 204). The femoral implant of any preceding claim, wherein the attachment opening (142; 242) is oriented with respect to a longitudinal axis (L) of the stem assembly (104; 204) to allow attachment of the femoral neck endoprosthesis (108; 208). the stem portion assembly (104; 204) at least substantially according to a femoral neck angle (W). The femoral implant of any preceding claim, wherein the attachment opening (142; 242) is oriented at an angle (W) in the range of 130 degrees to 150 degrees with respect to the longitudinal axis (L) of the stem assembly (104; 204). Femoral implant according to one of the preceding claims, wherein the attachment opening (142; 242) is designed for passing at least part of the femoral neck endoprosthesis (108; 208) through the stem part arrangement (104; 204), in particular from the side. femoral implant after claim 10 , wherein the attachment opening (142; 242) has a diameter in the range of 6 millimeters to 15 millimeters, preferably in the range of 8 millimeters to 12 millimeters. A femoral implant set (100; 204, 208; 300) comprising at least one femoral implant (104; 204; 320) according to any one of the preceding claims, wherein: the femoral implant set (100; 204, 208; 300) further comprises at least one femoral neck endoprosthesis (108; 208; 360, 361) which, by means of the attachment opening (142; 242) of the stem part arrangement (104; 204) of the at least a femoral implant (104; 204) can be attached to the stem part arrangement (104; 204), and/or the stem part arrangement (104) of the femoral implant (104) has at least one stem part base body (120; 320, 321) and at least one Bridging module (140; 340, 341), which can be connected to the stem part base body (120; 320, 321) in a longitudinal extension direction of the stem part arrangement (104), the femur implant set (300) comprising a plurality of bridging modules ( 340, 341) which can optionally be connected to the at least one handle part base body (320, 321) and which each have an attachment opening (142) and a bridge module connection section (144) for connecting the bridge module (340, 341) to the handle part -Base body (320, 321), wherein the bridge m module (340, 341) with respect to at least one of a distance between the attachment opening (142) and the bridge module connection section (144), an orientation of the attachment opening (142) with respect to a longitudinal axis (L) of the stem part arrangement and a diameter of the attachment opening (142) are different, and/or the stem part arrangement (104) of the femoral implant comprises at least one stem part body (120; 320, 321) and at least one bridge module (140; 340, 341), which can be connected to the stem part base body (120; 320, 321) in a direction of longitudinal extent of the stem part arrangement (104), the femoral implant set ( 300) comprises a plurality of handle part base bodies (320, 321) which can be selectively connected to the at least one bridge module (340, 341), the handle part base bodies (320, 321) having a size in a direction of longitudinal extension of the handle part arrangement are different. femoral implant set claim 12 , wherein the femoral implant set (100; 204, 208; 300) comprises at least one femoral neck endoprosthesis (160; 260; 360, 361) comprising a femoral neck screw (160; 260). femoral implant set Claim 13 wherein the attachment opening (142) comprises a bore and the femoral neck screw (160; 260) has a thread (162; 262) in a medial portion and a cylindrical profile (164; 264) in a lateral portion. Femoral implant set according to one of the Claims 12 until 14 , wherein the femoral implant set (300) comprises at least one femoral neck endoprosthesis (360, 361) which is used to reinforce a femoral neck (S) and/or to attach at least part of a hip endoprosthesis to the femoral neck endoprosthesis (360, 361 ) is formed when the femoral implant is anchored in a femoral bone stump (F).

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