Improvements in and relating to surgical component mounting systems

Abstract

The invention provides a surgical component mounting system. The surgical component mounting system may include a surgical instrument (5) and an intermediate component (20). The surgical instrument may have a proximal end and a distal end (7) that may provide a first portion (9) of the mount. The intermediate member may have a proximal end capable of providing a second portion (22) of the mount and a distal end (35) capable of being provided with a first portion (36, 38a, 38b) of a second mount such that the first portion of the mount and the second portion of the mount are detachable.

Description

[0001] This application claims priority to UK patent application No. 2205303.7 filed on April 11, 2022, the entirety of which is incorporated herein by reference. Technical Field

[0002] The present disclosure generally relates to orthopaedic devices, kits including such devices, and methods of using such devices, and more particularly to orthopaedic impaction devices, kits including such devices, and methods of using such devices. The present disclosure also has broader relevance in the installation of other surgical instruments. Background Art

[0003] Arthroplasty is a well-known surgical procedure whereby a diseased and / or damaged natural joint is replaced with a prosthetic joint. Examples include knee prostheses and hip implants. During the insertion and positioning of, for example, a femoral implant into the femur, an impact tool is typically engaged with the implant and then impacted to move the implant as desired. Summary of the invention

[0004] According to a first aspect of the present disclosure, there is provided a surgical component mounting system, the system comprising:

[0005] a surgical instrument having a proximal end and a distal end, the distal end of the surgical instrument providing a first portion of a mounting member;

[0006] An intermediate component having a proximal end portion providing a second portion of the mounting member and a distal end portion provided with a first portion of a second mounting member; wherein the first portion of the mounting member and the second portion of the mounting member are detachable.

[0007] The intermediate component may be a single surgical use component. The surgical instrument may be a multiple surgical use instrument.

[0008] The intermediate part may be used once and then discarded.The surgical instrument may be used once and then sterilized and reused, for example together with a new intermediate part.

[0009] The intermediate component may be provided with one or more characteristics that prohibit the intermediate component from being used as a component in multiple surgical applications.

[0010] The one or more characteristics may be susceptible to change under one or more conditions. The one or more conditions may be one or more conditions to which the intermediate component is subjected in the event of preparation for reuse. The one or more conditions may be washing temperature and / or exposure to one or more chemicals and / or exposure to disinfection temperature and / or exposure to sterilization temperature.

[0011] The one or more characteristics may be one or more visual indicia. The one or more visual indicia may be the presence of a visual indicia and / or the absence of a visual indicia. The one or more visual indicia may be the presence of a color. The one or more visual indicia may be a color change from a first color to a second color. The one or more indicia may be a warning.

[0012] One or more characteristics may be a changeable portion of the intermediate component. One or more characteristics may be a portion of the intermediate component that changes profile or shape, such as to prevent the intermediate component from being connected to the surgical component. One or more characteristics may be a portion of the intermediate component that ceases to exist, such as a retaining element no longer exists. One or more characteristics may be a portion of the intermediate component that ceases to function, such as to retain the intermediate component on the surgical instrument.

[0013] The removable mounting member may be adapted to limit axial movement of the surgical member and the intermediate member relative to each other in one or two axial directions in the engaged state. For example, during manipulation of the surgical instrument, the removable mounting member may be adapted to be sufficient to retain the intermediate member on the surgical instrument, or vice versa. The removable mounting member may be adapted to provide a restraint that is not sufficient to prevent a user from pulling the intermediate member away from the surgical instrument.

[0014] In a potential alternative, the removable mounting member may be adapted to provide, in an engaged state, a first portion of the mounting member and a second portion of the mounting member to restrict axial movement of the surgical component and the intermediate member relative to each other further toward each other. In an alternative, in the engaged state, the removable mounting member may be adapted to not restrict axial movement of the surgical component and the intermediate member relative to each other away from each other.

[0015] The intermediate component may be a cover element. The intermediate component may provide a main body portion. The intermediate component may potentially provide a recessed portion, such as a hole, such as a closed end hole, in the main body portion. The recessed portion or hole may have a longitudinal axis, such as aligned with the longitudinal axis of the intermediate component and / or the longitudinal axis of the surgical instrument. The recessed portion or hole may be defined by one or more of a side wall, a bottom wall, and a transition surface (such as a fillet) potentially disposed between the side wall and the bottom wall. The bottom wall may be substantially perpendicular to the longitudinal axis of the recessed portion or hole or substantially perpendicular to the longitudinal axis of the intermediate component.

[0016] The recess or hole may be provided with a mouth which preferably flares outwardly or tapers.

[0017] The recess or hole may have a cross section which is considered perpendicular to the longitudinal axis of the recess or hole and / or to the longitudinal axis of the intermediate element.

[0018] The middle part (e.g., the main body) may provide the outer wall. The middle part (e.g., the main body) may be a right circular cylinder. One or more locations on the outside of the middle part (such as the main body) may be provided with grooves and ridges or other depressions / protrusions combinations, for example to aid gripping.

[0019] The recess or hole may be provided with one or more retaining elements. The recess or hole may be provided with one or more protrusions extending inwardly (eg radially inwardly). The protrusions may be in the form of ribs or ridges, for example circular cross-section ribs or ridges.

[0020] A retaining element such as a protrusion may extend around the inner periphery of the recess or hole at a certain position. The retaining element may be arranged at a constant axial distance from the proximal end of the intermediate element and / or from the distal end of the intermediate element. The retaining element may be arranged at a constant depth relative to the mouth of the recess or hole and / or at a constant height relative to the bottom wall of the recess or hole.

[0021] The distal end of the intermediate element may provide a first portion of a second mounting member, the first portion comprising one or more protrusions. One or more or all of the protrusions may extend in a distal direction, for example parallel to the longitudinal axis of the recess or hole and / or parallel to the longitudinal axis of the intermediate element. The first portion of the second mounting member may comprise a primary protrusion and one or two or more secondary protrusions.

[0022] The main protrusion may extend along the longitudinal axis of the recess or hole and / or along the longitudinal axis of the intermediate element. The main protrusion may be arranged between two or more secondary protrusions, for example between a pair of secondary protrusions. One or more or all of the secondary protrusions may extend parallel to the longitudinal axis of the recess or hole and / or parallel to the longitudinal axis of the intermediate element. One or both or all of the secondary protrusions may be pointed teeth.

[0023] Two or more projections may be separated from each other by a gap, such as a recess. The gap or recess may be curved, for example having a semicircular cross-section. The gap or recess may have a reduced axial extent in the distal direction compared to the projections. In each case, the primary projection may be separated from the two secondary projections by a gap or recess.

[0024] The first portion of the second mounting member may have a greater extent in the first direction perpendicular to the longitudinal axis of the recess or hole and / or perpendicular to the longitudinal axis of the intermediate element than in the second direction. The second direction may be perpendicular to the first direction. The first direction may be an inner direction and / or an outer direction, and / or the second direction may be an anterior direction and / or a posterior direction. The first portion of the second mounting member may have a greater extent in the inner direction and / or an outer direction perpendicular to the longitudinal axis of the recess or hole and / or perpendicular to the longitudinal axis of the intermediate element than in the anterior direction and / or the posterior direction. The inner direction extent and / or the outer direction extent may be greater than 60% of the maximum radial extent of the intermediate component. The anterior direction extent and / or the posterior direction extent may be less than 40% of the maximum radial extent of the intermediate component.

[0025] In one embodiment, the first portion of the recess or hole may be provided with a cross-section that decreases away from the proximal end. The first portion may define the mouth of the recess or hole. The second portion of the recess or hole may be provided with a cross-section that decreases further away from the proximal end and then increases again further away from the proximal end. The second portion may define one or more retaining elements. The third portion of the recess or hole may be provided with a reduced cross-section, such as slightly tapered. The first portion may form less than 20% of the depth of the recess or hole. The second portion may form less than 20% of the depth of the recess or hole. The third portion may provide at least 65% of the depth of the recess or hole.

[0026] In one embodiment, the recess or hole is surrounded by the main body portion and the recess or hole has a maximum radial extent that is at least 65% of the maximum radial extent of the main body portion.The recess or hole may have a circular cross section and / or the main body portion may have a circular cross section.

[0027] In one embodiment, the recess or hole may be provided in the body portion, and the recess or hole may have a maximum depth that is less than 70% of the axial length of the intermediate component from the proximal end to the distal end.

[0028] In a second embodiment, the first portion of the recess or hole may be provided with a cross section that decreases away from the proximal end. The first portion may define the mouth of the recess or hole. The second portion of the recess or hole may be provided with a cross section that decreases further away from the proximal end and then increases again further away from the proximal end. The second portion may define one or more retaining elements. The third portion of the recess or hole may be provided with a reduced cross section, such as slightly tapered. The first portion may form less than 20% of the depth of the recess or hole. The second portion may form less than 20% of the depth of the recess or hole. The third portion may provide at least 65% of the depth of the recess or hole.

[0029] In a second embodiment, the recess or hole is surrounded by the main body portion and the recess or hole has a maximum radial extent that is at least 35% of the maximum radial extent of the main body portion.The recess or hole may have a circular cross section and / or the main body portion may have a circular cross section.

[0030] In a second embodiment, a recess or hole may be provided in the body portion, and the recess or hole may have a maximum depth that is less than 70% of an axial length of the intermediate component from the proximal end to the distal end.

[0031] In a third embodiment, the first portion of the recess or hole may be provided with a cross section that decreases away from the proximal end. The first portion may define the mouth of the recess or hole. A second portion of the recess or hole may not be provided, the cross section of which decreases further away from the proximal end and then increases again further away from the proximal end. A second portion that may define one or more retaining elements may not be provided. The second portion of the recess or hole may be provided with a reduced cross section, such as slightly tapered. The first portion may form less than 20% of the depth of the recess or hole. The second portion may form at least 75% of the depth of the recess or hole.

[0032] In a third embodiment, the recess or hole is surrounded by the main body portion and the recess or hole has a maximum radial extent that is at least 35% of the maximum radial extent of the main body portion.The recess or hole may have a circular cross section and / or the main body portion may have a circular cross section.

[0033] In a third embodiment, a recess or hole may be provided in the body portion, and the recess or hole may have a maximum depth that is less than 70% of an axial length of the intermediate component from the proximal end to the distal end.

[0034] In a third embodiment, an interference fit may be employed between the first portion of the mount and the second portion of the mount.

[0035] In a fourth embodiment, the mount may be a bayonet mount. A female portion having one or more radially extending lugs or pins (e.g., extending inwardly) may be provided on the intermediate member. A male portion having one or more slots (e.g., recessed in an outer surface) for receiving the one or more lugs or pins may be provided on the surgical instrument.

[0036] In a fifth embodiment, the mounting member may be a threaded mounting member. A male portion having an external thread may be provided on the surgical instrument. A female portion having an internal thread may be provided on the intermediate component.

[0037] In a sixth embodiment, the mounting member may be a complementary surface type mounting member. For example, a complementary protrusion profile may be provided on one of the surgical instrument and the intermediate component, and a complementary recessed portion profile may accordingly be provided on the other of the surgical instrument and the intermediate component. The complementary protrusion profile may be a cross-shaped protrusion, for example one or more or all of whose side walls are substantially parallel to the longitudinal axis of the surgical instrument or the intermediate component on which the profile is provided. The complementary recessed portion profile may be a cross-shaped recessed portion, for example one or more or all of whose side walls are substantially parallel to the longitudinal axis of the surgical instrument or the intermediate component on which the profile is provided.

[0038] The surgical instrument may be an orthopedic instrument. The surgical instrument may be an impactor instrument. The surgical instrument may be used, for example, to apply an axial force or a substantially axial force to an implant and / or another surgical instrument. The surgical instrument may be used to apply a lateral force (e.g., inwardly and / or outwardly) instead of or in addition to an axial force or a substantially axial force.

[0039] The axial force may vary, for example, due to another instrument impacting the surgical instrument. The force, such as an axial force, may be applied to the proximal end of the surgical instrument. The other instrument may apply the force to the surgical instrument, then through the intermediate component, then to the implant. The other instrument may apply the force to the surgical instrument, then through the intermediate component, then through another surgical instrument, then to the implant.

[0040] The impactor instrument may be used with an implant. The implant may be a femoral implant. The implant may be an acetabular cup. The implant may be an acetabular shell.

[0041] The distal end of the surgical instrument may be configured to engage with an intermediate component, such as a proximal end of the intermediate component, by means of a mounting member.

[0042] The distal end of the surgical instrument may include a rod. The rod may have the same cross-sectional profile as other adjacent sections of the surgical instrument. The rod may be a shaft, for example, having a circular cross-section. The rod may have a longitudinal axis, for example aligned with the longitudinal axis of at least an adjacent portion of the surgical instrument and / or aligned with the longitudinal axis of the intermediate component in use. The rod may be defined by one or more of a side wall, an end wall, and a transition surface (such as a fillet) potentially disposed between the side wall and the end wall. The end wall may be substantially perpendicular to the longitudinal axis of the rod and / or perpendicular to the longitudinal axis of the surgical instrument and / or perpendicular to the intermediate component in use.

[0043] The rod may have a cross-section that is considered perpendicular to the longitudinal axis of the rod and / or to an adjacent section of the surgical instrument and / or, in use, perpendicular to the intermediate element.

[0044] The rod may provide the outer wall. The rod may be a right circular cylinder.

[0045] The rod may be provided with one or more rod retaining elements. The rod may be provided with one or more recesses extending inwardly (eg radially inwardly). The recess may be in the form of a groove (eg a circular groove).

[0046] The rod retaining element, such as a recess, may extend around the outer periphery of the rod.The rod retaining element may be provided at a constant axial distance from the distal end of the rod.

[0047] The rod retaining element may be disposed at a consistent distance from the distal end of the surgical component.

[0048] The shaft and / or adjacent section of the surgical instrument may have a longitudinal axis that is tilted or offset relative to a longitudinal axis of another portion of the surgical instrument. The proximal end of the surgical instrument may be offset from the longitudinal axis of the shaft and / or adjacent section.

[0049] At least part of the outer contour of the rod may be complementary to at least part of the inner contour of the middle part. The end face of the rod may be complementary to the bottom wall of a recess or hole in the middle part. The side wall of the rod may be at least partially complementary to the side wall of the hole or recess.

[0050] At least a portion of the rod retaining element may be complementary to at least a portion of the retaining element of the intermediate component.At least a portion of the retaining element of the intermediate component may be received within at least a portion of the rod retaining component.

[0051] The axial distance of the rod retaining element may be complementary to the axial distance of the retaining element of the intermediate part from the bottom wall of the recess or hole.

[0052] The mounting member may include a male portion and a female portion. The male portion may be disposed on the surgical instrument. The female portion may be disposed on the intermediate member.

[0053] The first portion of the mounting member may be complementary to the second portion of the mounting member.

[0054] The second mounting member may include a male portion and a female portion. The male portion may be disposed on the intermediate member. The female portion may be disposed on a further surgical member and / or an implant.

[0055] The first portion of the second mounting member may be complementary to the second portion of the second mounting member.

[0056] The second portion of the mounting member may be complementary to the first portion of the mounting member. The second portion of the mounting member may include a recessed portion. The recessed portion may be at least partially complementary to the protrusion of the first portion of the mounting member.

[0057] In one embodiment, in particular, the section of the rod received in the intermediate component may provide a first portion of the rod, which may be provided with a cross section that increases away from the distal end. The first portion may define the end of the rod. The second portion of the rod may be provided with an increased cross section, such as slightly tapered. The third portion of the rod may be provided with a cross section that decreases further away from the distal end and then increases again further away from the distal end. The third portion may define one or more rod retaining elements. The fourth portion of the rod may be provided with an increased cross section, such as slightly tapered, or constant. The first portion may form less than 20% of the section of the rod received in the intermediate component. The second portion may form more than 50% of the section of the rod received in the intermediate component. The third portion may form less than 20% of the section of the rod received in the intermediate component. The fourth portion may provide less than 20% of the section of the rod received in the intermediate component.

[0058] In a second embodiment, in particular, the section of the rod received in the intermediate component may provide a first portion of the rod, which first portion of the rod may be provided with a cross section that increases away from the distal end. The first portion may define the end of the rod. The second portion of the rod may be provided with an increased cross section, such as a slight taper. The third portion of the rod may be provided with a cross section that decreases further away from the distal end and then increases again further away from the distal end. The third portion may define one or more rod retaining elements. The fourth portion of the rod may be provided between the third portion and the fifth portion that is not received in the intermediate component. The fifth portion may be provided with a cross section that is larger than the first portion and / or the second portion and / or the third portion and / or the fourth portion. The fifth portion may have a cross section within 80% of the cross section of the adjacent section of the surgical instrument. The first portion may form less than 20% of the section of the rod received in the intermediate component. The second portion may form more than 50% of the section of the rod received in the intermediate component. The third portion may form less than 20% of the section of the rod received in the intermediate component. The fourth portion may provide less than 20% of the section of the rod received in the intermediate component. The fifth portion may not be received within the intermediate component.

[0059] In a third embodiment, in particular, the section of the rod received in the intermediate component may provide a first portion of the rod, which first portion of the rod may be provided with a cross section that increases away from the distal end. The first portion may define the end of the rod. The second portion of the rod may be provided with an increased cross section, such as a slightly tapered portion. A third portion of the rod may not be provided, in which the cross section decreases further away from the distal end and then increases again further away from the distal end. The third portion of the rod may be provided between the second portion and a fourth portion that is not received in the intermediate component. The fourth portion may be provided with a cross section that is larger than the first portion and / or the second portion and / or the third portion. The fourth portion may have a cross section within 80% of the cross section of the adjacent section of the surgical instrument. The first portion may form less than 20% of the section of the rod received in the intermediate component. The second portion may form more than 50% of the section of the rod received in the intermediate component. The third portion may form less than 20% of the section of the rod received in the intermediate component. The fifth portion may not be received in the intermediate component.

[0060] The intermediate component may be formed from one or more of stainless steel, tungsten carbide, titanium, ceramic or plastic. Potential ceramics may include alumina and calcium phosphate. Potential plastic materials may include ultra high molecular weight polyethylene [UHMW], polycarbonate, acrylonitrile butadiene styrene [ABS] and polydicyclopentadiene polymer [PDCPD]. The intermediate component may be provided with a coating, for example covering the impact bearing surface.

[0061] Alternatively, any feature or combination of features referred to as part of an intermediate component may be provided on a surgical component and / or an additional surgical component. Alternatively, any feature or combination of features referred to as part of a surgical instrument may be provided on an intermediate component. Any combination of features described as being provided on a surgical instrument and an intermediate component may be provided in a reverse configuration, wherein surgical instrument features are transferred to the intermediate component and intermediate component features are transferred to the surgical instrument.

[0062] The first aspect may include any of the features, possibilities and options set out elsewhere in this document, including in other aspects.

[0063] According to a second aspect of the present disclosure, an intermediate component potentially used in a surgical component mounting system is provided, the intermediate component having a proximal end, the proximal end of the intermediate component providing a second part of a mounting member potentially used to be connected to a second part of a mounting member of a surgical component, the intermediate component having a distal end, the distal end of the intermediate component being provided with a first part of a second mounting member potentially used to be connected to a surgical implant, wherein the second part of the mounting member and the first part of the second mounting member are detachable mounting members.

[0064] Alternatively, any feature or combination of features referred to as part of an intermediate component may be provided on a surgical component and / or an additional surgical component. Alternatively, any feature or combination of features referred to as part of a surgical instrument may be provided on an intermediate component. Any combination of features described as being provided on a surgical instrument and an intermediate component may be provided in a reverse configuration, wherein surgical instrument features are transferred to the intermediate component and intermediate component features are transferred to the surgical instrument.

[0065] The second aspect may include any of the features, possibilities and options set out elsewhere in this document, including in other aspects.

[0066] According to a third aspect of the present disclosure, a surgical instrument, particularly for use in a surgical component mounting system, is provided, the surgical instrument having a proximal end and a distal end, the distal end of the surgical instrument providing a first portion of a mounting member, wherein the first portion of the mounting member is a detachable mounting member.

[0067] Alternatively, any feature or combination of features referred to as part of an intermediate component may be provided on a surgical component and / or an additional surgical component. Alternatively, any feature or combination of features referred to as part of a surgical instrument may be provided on an intermediate component. Any combination of features described as being provided on a surgical instrument and an intermediate component may be provided in a reverse configuration, wherein surgical instrument features are transferred to the intermediate component and intermediate component features are transferred to the surgical instrument.

[0068] The third aspect may include any of the features, possibilities and options set out elsewhere in this document, including in other aspects.

[0069] According to a fourth aspect of the present disclosure, there is provided a kit, the kit comprising:

[0070] at least one surgical instrument having a proximal end and a distal end, the distal end of the surgical instrument providing a first portion of the mounting member;

[0071] At least one intermediate component, the at least one intermediate component has a proximal end, the proximal end of the intermediate component provides the second part of the mounting member, and the intermediate component has a distal end, the distal end of the intermediate component is provided with the first part of the second mounting member; wherein the first part of the mounting member and the second part of the mounting member are detachable.

[0072] Alternatively, any feature or combination of features referred to as part of an intermediate component may be provided on a surgical component and / or an additional surgical component. Alternatively, any feature or combination of features referred to as part of a surgical instrument may be provided on an intermediate component. Any combination of features described as being provided on a surgical instrument and an intermediate component may be provided in a reverse configuration, wherein surgical instrument features are transferred to the intermediate component and intermediate component features are transferred to the surgical instrument.

[0073] The fourth aspect may include any of the features, possibilities and options set out elsewhere in this document, including in other aspects.

[0074] According to a fifth aspect of the present invention, there is provided a method for mounting a surgical instrument using a surgical component mounting system, the method comprising:

[0075] providing a surgical instrument having a proximal end and a distal end, the distal end of the surgical instrument providing a first portion of a mounting member;

[0076] providing an intermediate component having a proximal end, the proximal end of the intermediate component providing a second portion of the mounting member, and a distal end of the intermediate component, the distal end of the intermediate component being provided with a first portion of a second mounting member;

[0077] The first portion of the mounting member and the second portion of the mounting member are connected, and the connection is detachable.

[0078] The method may comprise a disassembled state of the surgical instrument and the intermediate part, in which the surgical instrument and the intermediate part are separated from each other. The method may comprise the step of approximating a distal end of the surgical instrument and a proximal end of the intermediate part, for example to obtain the disassembled state.

[0079] The method may include a contact state of the surgical instrument and the intermediate component. The method may include inserting a segment of one of the surgical instrument and the intermediate component into the other of the intermediate component and the surgical instrument, for example to obtain a contact state. The method may include inserting a segment of the surgical instrument into the intermediate component, for example to obtain a contact state.

[0080] The method may include an engaged state. The method may include inserting one of the surgical instrument and the intermediate component into the other, for example until an end face of one abuts a bottom wall of the other. The method may include inserting one of the surgical instrument and the intermediate component into the other until no further insertion is possible, for example to obtain an engaged state.

[0081] In the engaged state, engagement may be provided between one or more retaining elements on the surgical instrument and / or one or more retaining elements on the intermediate component.

[0082] The method may include relative movement between the surgical instrument and the intermediate component until one or more retaining elements on the surgical instrument and / or one or more retaining elements on the intermediate component engage, for example, to obtain an engaged state. For example, a groove on one may engage a rib on the other.

[0083] In the engaged state, the engagement may be provided by an interference fit between the surgical instrument and the intermediate component.

[0084] In the engaged state, the surgical component and the intermediate component may be restricted from axial movement relative to each other in one or two axial directions. The restriction may be sufficient to retain the intermediate component on the surgical instrument, or vice versa. The restriction may not be sufficient to prevent a user from pulling the intermediate component away from the surgical instrument.

[0085] The method may include a second disassembled state of the surgical instrument and intermediate component combination, in which the combination is separated from the further surgical instrument and / or the implant. The method may include the step of bringing the distal end of the intermediate component and the proximal end of the further surgical instrument and / or the implant closer together, for example to obtain the second disassembled state.

[0086] The method may include a second contact state of the surgical instrument and intermediate component combination with the additional surgical instrument and / or implant. The method may include inserting a segment of one of the additional surgical instruments and / or implants into the intermediate component, for example to obtain the second contact state. The method may include inserting a segment of the intermediate component into the additional surgical instrument and / or implant, for example to obtain the second contact state.

[0087] The method may include a second engagement state. The method may include inserting the intermediate component into the further surgical instrument and / or implant, for example until the end of the protrusion of one abuts the bottom wall of the other. The method may include inserting the further surgical instrument and / or implant into the intermediate component, for example until the end of the protrusion of one abuts the bottom wall of the other. The method may include inserting one into the other until no further insertion is possible, for example to obtain the second engagement state.

[0088] In the second engaged state, further axial movement of the surgical instrument and intermediate component combination and the additional surgical instrument and / or implant may be resisted.In the second engaged state, axial movement of the surgical instrument and intermediate component combination away from the additional surgical instrument and / or implant may not be resisted.

[0089] The method may also include moving and / or adjusting the position of additional surgical instruments and / or implants.

[0090] Alternatively, any feature or combination of features referred to as part of an intermediate component may be provided on a surgical component and / or an additional surgical component. Alternatively, any feature or combination of features referred to as part of a surgical instrument may be provided on an intermediate component. Any combination of features described as being provided on a surgical instrument and an intermediate component may be provided in a reverse configuration, wherein surgical instrument features are transferred to the intermediate component and intermediate component features are transferred to the surgical instrument.

[0091] The fifth aspect may include any of the features, possibilities and options set out elsewhere in this document, including in other aspects. BRIEF DESCRIPTION OF THE DRAWINGS

[0092] Various embodiments of the present disclosure will now be described, by way of example only, and with reference to the accompanying drawings, in which:

[0093] Figure 1a The distal end of the impaction device adjacent to the femoral component is shown without a cover;

[0094] Figure 1b showing a distal end of the impact device engaged with a femoral component in a femur;

[0095] Figure 2a is a front view or a rear view of a cover according to a first embodiment of the present disclosure;

[0096] Figure 2b yes Figure 2a an inner or outer view of the lid;

[0097] Figure 2c yes Figure 2a and Figure 2b A partial bottom view of the cover;

[0098] Figure 3a is with Figure 2a , Figure 2b and Figure 2c A front view or a rear view of a distal end of an impact device used with a cover;

[0099] Figure 3b yes Figure 3a A bottom view of a distal end of the impact device;

[0100] Figure 4a is a front view or a rear view of a cover according to a second embodiment of the present disclosure;

[0101] Figure 4b yes Figure 4a an inner or outer view of the lid;

[0102] Figure 5a is with Figure 4a and Figure 4b A front view or a rear view of a distal end of an impact device used with a cover;

[0103] Figure 5b yes Figure 3a A bottom view of a distal end of the impact device;

[0104] Figure 6a is a front view or a rear view of a cover according to a third embodiment of the present disclosure;

[0105] Figure 6b yes Figure 6a an inner or outer view of the lid;

[0106] Figure 7a is with Figure 7a and Figure 7b A front view or a rear view of a distal end of an impact device used with a cover;

[0107] Figure 7b yes Figure 3a A bottom view of a distal end of the impact device;

[0108] Figure 8a is a front view or a rear view of a cover according to a fourth embodiment of the present disclosure;

[0109] Figure 8b yes Figure 8a A bottom view of the cover;

[0110] Figure 9a is with Figure 8a and Figure 8b A front view or a rear view of a distal portion of an impact device used with a cover;

[0111] Figure 9b yes Figure 9a A bottom view of a distal end of the impact device;

[0112] Fig.10a is a front view or a rear view of a cover according to a fifth embodiment of the present disclosure;

[0113] Fig.10b yes Fig.10a A bottom view of the cover;

[0114] Fig.11a is with Fig.10a and Fig.10b A front view or a rear view of a distal portion of an impact device used with a cover;

[0115] Fig.12a is a front view or a rear view of a cover according to a sixth embodiment of the present disclosure;

[0116] Figure 12b yes Fig.12a A bottom view of the cover;

[0117] Fig.13a is with Fig.12a and Figure 12b A front view or a rear view of a distal portion of an impact device used with a cover;

[0118] Fig.13b yes Fig.12a A bottom view of a distal end of the impact device; and

[0119] Fig.14 Reference is made to various typical parts of a cover according to an embodiment to provide sizing guidance. DETAILED DESCRIPTION

[0120] Although the concepts of the present disclosure are susceptible to various modifications and alternative forms, specific embodiments thereof have been shown by way of example in the accompanying drawings and will be described in detail herein. However, it should be understood that it is not intended that the concepts of the present disclosure be limited to the specific forms disclosed herein, but on the contrary, the purpose of the present invention is to cover all modifications, equivalent forms and alternative forms consistent with the present disclosure and the appended claims.

[0121] Throughout the specification, when referring to plastic surgery implants or prostheses and surgical instruments described herein and the natural anatomy of the patient, terms indicating anatomical references may be used, such as anterior, posterior, medial, lateral, superior, inferior, etc. These terms have well-known meanings in the field of anatomical research and plastic surgery. Unless otherwise specified, these anatomical reference terms used in the written detailed description and claims are intended to be consistent with their well-known meanings.

[0122] Impact devices are used in a variety of surgical procedures, including orthopedic surgery, to apply a force to another device or implant to insert or otherwise move the other device or implant. The proximal end of the impact device is designed to have an impact force applied thereto during use. The distal end of the impact device is designed to abut, and more commonly engage, the proximal end of the other device or implant.

[0123] In the context of a femoral implant 1 that moves relative to a femur 3, Figure 1a and Figure 1b An example of this method in orthopedic surgery is shown in FIG. The impact device 5 is provided with a pair of tines 9 at the distal end 7. The femoral implant 1 is provided with a complementary recess 11. The impact device 5 is manipulated until the tines 9 are aligned with the corresponding portions 13 of the complementary recess 11. Figure 1a]. The impact device 5 is then advanced towards the femoral implant 1 so that the distal end 7 of the impact device 5 enters the complementary recess 11. Once engaged in this way [ Figure 1b ], that is, impact forces can be applied to the proximal end of the impact device 5 [not shown], and these impact forces are transmitted to the femoral implant 1 through the distal end 7.

[0124] It is desirable to provide an alternative engagement between the distal end of an impact device and another device or implant for reasons including: reducing the risk of breakage of the impact device [such as a rod inserter tip] during operation; and reducing deformation around the impact seat on the implant.

[0125] In applications of interest, the material level of impact force is applied to the impact device and transmitted through the implant. Misalignment of the distal end of the impact device and another device or implant, incorrect connection of the distal end of the impact device and another device or implant, or other factors may result in lateral components of the force. In the case of repeated use, these lateral components may create a risk of fatigue cracking in the interface at the distal end of the surgical instrument even if the rest of the impactor device still has material life.

[0126] The method described in the following embodiments allows a greater degree of control over the number of times the impact device and implant interface are used to apply impact forces to the implant, thereby mitigating any risk of fatigue cracking of the surgical instrument. This is achieved by providing an intermediate component between the surgical instrument and another surgical instrument or implant, to which the impact forces will be applied.

[0127] The method described below is also beneficial because changing the intermediate component to mount further surgical instruments or implants means that a common surgical instrument [such as a rod inserter shaft] can be used for a wider range of products; the intermediate component serves as an adapter function.

[0128] The intermediate component enables the use of existing joints with further surgical instruments and / or implants, but since the intermediate component can be discarded after use, there is no risk of fatigue cracking or the like.

[0129] The intermediate member enables a more resilient interface to be provided between the surgical instrument and the intermediate member, making the surgical instrument more resistant to any lateral force components and / or less susceptible to fatigue.

[0130] like Figure 2a , Figure 2b and Figure 2c As illustrated, the intermediate part of the cover element 20 type may be arranged to be positioned in use between the distal end of the impact device and another device or implant, in particular when impact forces are transmitted to the other device or implant.

[0131] The cover element 20 has a hole 22 defined by a side wall 24, a bottom wall 26 and a fillet 28 therebetween. The side wall 24 is provided with a rib 30 extending around the inner periphery of the hole 22. The rib 30 is arranged at a constant depth relative to a mouth 32 of the hole 22 and at a constant height relative to the bottom wall 26 of the hole 22. The mouth 32 tapers outwardly to facilitate the introduction of an impact device.

[0132] The lower surface 34 of the cap element 20 and thus the distal end 35 of the cap element 20 is provided with a tip 36 and on either side of the tip 36 are provided with tines 38a, 38b spaced from the tip 36 by a recess 40. The recess 40 is formed by two ring segments. The tip 36 is medially-laterally [ Figure 2a ] than in front side - back side [ Figure 2b ] has a larger range.

[0133] The outer wall 42 of the cover element 20 is a right circular cylinder and may be provided with grooves and ridges or other depression / protrusion combinations to facilitate gripping. The hole 22 has a circular cross-section relative to the longitudinal axis XX of the cover element 20. The hole 22 is adapted to receive a portion of an impactor device [ Figure 3a and Figure 3b ]. The diameter of the hole 22 can be easily configured during manufacturing to make the cap element 20 compatible with a particular impact device 52 among a variety of impact devices having distal ends 50 of different diameters.

[0134] exist Figure 3a , a distal end 50 of an impact device 52 is shown. In this embodiment, a cylindrical end section 54 is provided at the distal end 50, and the longitudinal axis of the section may be offset relative to the longitudinal axis of the intermediate section 56, for example to provide an offset to an impact portion (not shown) at the proximal end of the impact device 52.

[0135] The groove 58 is provided in the outer surface 60 , and the groove 58 extends around the entire circumference of the distal end 50 and is provided to maintain a constant interval from the end surface 62 of the distal end 50 .

[0136] The end section 54 is configured to be complementary to the hole 22 in the cover element 20. Thus, the end section 54 has a radius having a tolerance less than the radius of the hole 22, a chamfered edge 56 having a tolerance less than the profile of the fillet 28, and a height of the groove 58 relative to the end surface 62 having a tolerance less than the height of the rib 30 relative to the bottom wall 26 of the hole 22. The fillets and radii provided serve as stress reduction features.

[0137] In use, the cap element 20 and the distal end 50 of the impact device are brought close to each other, in a disassembled state, and then the distal end 50 is inserted into the hole 22. Insertion continues until the end surface 62 abuts the bottom wall 26 and no further insertion is possible, in an inserted state. In this position, the rib 30 is received in the complementary profile of the groove 58, in an attached state. Thus, the cap element 20 and the impact device 52 are clamped together. The cooperation of the rib 30 and the groove 58 resists axial movement of the cap element 20 relative to the impact device 52; the cap element 20 is releasably retained on the impact device 52.

[0138] Alternative embodiments are possible in which the inserted state is provided without being in the attached state, so that there is no or almost no resistance to the axial movement of the cover element 20 relative to the impact device 52 away from each other again.

[0139] In this attached state, the distal end 35 of the cover element 20 can be aligned with the above-mentioned Figure 1a and Figure 1b The device 20 is aligned with another device or implant and inserted into the other device or implant in a similar manner to the manner described above (impactable state). To do this, the tip of the cap element 20 is brought close to the other device or implant, and then the tip 36 and the tines 38a, 38b are aligned with the complementary recesses in the other device or implant, and then the tip 36 and the tines 38a, 38b are inserted into the complementary recesses. Once inserted, a safe and stable interface is provided between the impact device and the other device or implant, and thus the impact force can be successfully applied.

[0140] The cover element 20 can be universal in its profile while still successfully integrating with the distal end 7 of the impact device 5 and thus suitable for use with a variety of impact devices 5 with simple modifications. In this way, the cover element 20 can be reconfigured for different geometries of interfaces with impact devices and / or different geometries of interfaces with another device or implant. For example, the depth of the hole 22 can be easily increased or decreased and / or the diameter can be reconfigured and / or the groove / recess combination can have a different profile without having to redesign the cover element 20 as a whole.

[0141] The cap element 20 is intended for use in a single surgical procedure only. The impact device 52 is intended for repeated use in multiple surgeries.

[0142] By being used only once, the cover element 20 is designed to significantly reduce the risk of distal tip fracture during surgery. As a single-use cover element 20, the cover element 20 can be produced from a softer material than that used in the impact device 5 and thus reduce any deformation of other surgical instruments and / or implants [e.g., a rod removal hole of an implant] in contact therewith.

[0143] exist Figure 4a and Figure 4b In the embodiment of the present invention, an alternative embodiment of the cover element 20 is provided. In this case, an alternative "click together" format is provided. The cover element 20 also has a hole 22 defined by a side wall 24, a bottom wall 26 and a fillet 28 between the side wall and the bottom wall. The side wall 24 is provided with a rib 30 extending around the inner periphery of the hole 22. Again, the edge is arranged at a constant depth relative to the mouth 32 of the hole 22 and has a constant height relative to the base 26 and the hole 22.

[0144] Again, the lower surface 34 of the cover element 20 is provided with a tip 36 and tines 38 a , 38 b spaced from the tip 36 by a recess 40 .

[0145] The hole 22 also has a circular cross-section relative to the longitudinal axis XX of the cover element 20. The hole 22 is suitable for receiving a part of the impactor device [ Figure 5a and Figure 5b ].

[0146] like Figure 5a It can be seen that the distal end 50 of the impact device 52 is provided with a reduced diameter shaft portion 70, which is reduced in diameter when compared to the rest of the distal end 50 of the impact device 52. As previously described, a cylindrical end section 54 is provided and a mounting is provided for the shaft portion 70. The shaft portion 70 is provided with a groove 58 in its outer surface 60 and the groove 58 extends around the entire circumference of the shaft portion 70. The groove is provided at a constant spacing from the end surface 62 of the distal end 50 and is also provided at a constant spacing from a transition surface 72 at the end of the cylindrical end section 54.

[0147] The stem portion 70 is configured to complement the hole 22 and the cover element 20. Thus, the stem portion 70 has a radius with a tolerance less than the radius of the hole 22, a chamfered edge 56 with a tolerance less than the profile of the fillet 28, and a height of the groove 58 relative to the end surface 62 with a tolerance less than the height of the rib 30 relative to the bottom wall 26 of the hole 22.

[0148] The stem portion 70 tapers slightly from its proximal end 76 to the distal end 52. This occurs when the distal end 50 is introduced into the hole.

[0149] In use, the cap element 20 and the distal end 50 of the impact device are brought close to each other and introduced into each other in the same manner as described above. Thus, the cap element 20 has a disassembled state, an inserted state in which the end surface 62 abuts the bottom wall 26 to prevent further insertion, and the locating surface 72 abuts the upper wall 74 of the cap element 20. Likewise, the rib 30 is received in the complementary contour of the groove 58 in the attached state.

[0150] exist Figure 6a and Figure 6b In the embodiment, a further alternative embodiment of the cover element 20 is provided. In this case, an interference fit method is adopted. The cover element 20 has a hole 22 defined by a side wall 24, a bottom wall 26 and a fillet 28 between the side wall and the bottom wall. An upper wall 74 is also provided. In this embodiment, no rib or groove arrangement is provided, and the side wall 24 is continuous, but may be tapered.

[0151] The tip 36, tines 38a, 38b and recess 40 are arranged in a similar manner as described above.

[0152] like Figure 7a and Figure 7b As shown, the rod portion 70 at the distal end 50 of the impact device 52 also lacks any recess or groove of this type.

[0153] The stem portion 70 is configured to be complementary to the hole 22 in the cover element. Thus, the stem portion 70 has: a radius, the tolerance of which is less than the radius of the hole 22; a chamfered edge 56, the tolerance of which is less than the profile of the fillet 28; and a length of the stem portion 70 along the longitudinal axis XX, the tolerance of which is less than the depth of the hole 22.

[0154] In use, the cap element 20 and the distal end 50 of the impact device are brought together and inserted. Insertion continues until the end surface 62 abuts the base hole 26 and the transition surface 72 abuts the upper wall 74 to prevent any further insertion. The interference fit provided between the stem portion 70 and the hole 22 is used to retain the cap element 20 on the impact device 5 during use.

[0155] Other embodiments of the engagement between the cover element 20 and the impact device 52 are possible. For example:

[0156] exist Figure 8a and Figure 8b as well as Figure 9a and Figure 9bIn the embodiment of the present invention, a bayonet type engagement is adopted. As before, the cover element 20 has a hole 22, a bottom wall 26 and a side wall 24, but the side wall 24 is provided with a plurality of lugs 80 protruding inwardly. These can be inserted axially into an opening portion 82 of a recess in the end section 54, then inserted into a base portion 84 of the recess, and rotated into a locking end portion 86 of the recess.

[0157] exist Fig.10a and Fig.10b as well as Fig.11a and Fig.11b As before, the cap element 20 has a hole 22, a bottom wall 26 and a side wall 24, but the side wall 24 is provided with a thread 90. After initial insertion, rotation of the cap element 20 results in engagement with the impact device and its thread 92 and increased threaded engagement.

[0158] exist Fig.12a and Figure 12b Together with Fig.13a and Fig.13b In the embodiment of the present invention, a complementary surface type engagement is provided. The cover element 20 is provided with a solid body 100 having a cross-shaped recess 102 formed in the proximal end of the solid body 100. The cross-shaped recess 102 is formed by two intersecting channels 104 and 106 arranged at right angles to each other in this case. The distal end of the impact device is provided with a cross-shaped protrusion 108, which is complementary to the profile of the cross-shaped recess 102. The cross-shaped protrusion is formed by two intersecting protrusions 110 and 112.

[0159] As for suitable materials for the cover element 20, these materials need to be able to successfully withstand the worst possible conditions for a single use. Any changes in the cover element 20 should be below the level that affects the efficacy of the system. Plastics, metals and ceramics all provide potential materials for the cover element 20.

[0160] Single use of the cover element 20 can be ensured by careful selection of the material of the cover element 20 relative to the conditions encountered in any attempt to reuse the cover element 20. For example, the material can be selected to be destroyed or at least rendered ineffective by washing and / or autoclaving of the cover element 20.

[0161] A wide variety of materials are suitable for forming the cover member 20. The cover member 20 may be formed of the same material or type of material as the surgical instrument (e.g., impact device 52) to be mounted thereon. Suitable materials include stainless steel, tungsten carbide, titanium, selected ceramics, and selected plastics. Potential ceramics include aluminum oxide and calcium phosphate. Potential plastics include polyphenylsulfone [such as Solvay's ], polyetherketone [PEEK], and polypropylene resins [such as those available from Westlake Plastics ]. Other potential plastic materials may include ultra-high molecular weight polyethylene [UHMW], polycarbonate, acrylonitrile butadiene styrene [ABS] and polydicyclopentadiene polymer [PDCPD].

[0162] The cover element 20 may be provided with a partial or full coating, for example a partial ceramic coating covering the impact bearing surface, to modify the properties at certain locations on the cover element 20 .

[0163] Since the cover element 20 is intended for single use, a wider range of materials may be suitable than for a reusable surgical instrument. As a single-use component, the cover element 20 may be provided by a cheaper material than the surgical instrument.

[0164] Although intended to be reused and then discarded, ideally for recycling of materials, it is desirable to actively prevent inadvertent reuse of the cover element 20. There are various methods of achieving this or facilitating this.

[0165] If an attempt is made to prepare the cap element 20 for reuse, potential methods include a visible change indicator. Attempts to prepare the cap element 20 for reuse would include the likes of: cleaning / washing; thermal disinfection [typically at 73°C to 90°C] and / or chemical disinfection; sterilization [typically saturated steam at 130°C to 137°C for 3 minutes to 3.5 minutes]. The visible change indicator would respond to exposure to one or more of these steps and the conditions they represent by undergoing a visible change in the appearance of the visible change indicator and thereby marking that a previous use has occurred or that the cap is at risk for reuse.

[0166] Potential approaches include physical changes to one or more features of the cover element 20 as a result of preparation for reuse. Deformation of one or more portions of the cover element 20 would be one possibility. For example, the temperatures encountered may cause retaining elements of the cover element 20 [e.g., ribs 30 or the internal contour of the hole 22 providing an interference fit] to change physical format or contour such that they no longer provide for mounting the cover element 20 on the impact device 52. Retaining elements (such as ribs 30) are not used to transmit impact forces through the cover element 20, but only to hold the two together during manipulation to the use position. Therefore, the retaining element can be formed of a material that readily undergoes such a physical transformation under such conditions, as a wide range of materials are suitable for providing such a low retaining force to simply hold the cover element 20 on the impact device 52. For example, polyethylene oxide [PEG] melts at approximately 66°C.

[0167] refer to Fig.14 , a series of parts are marked, and only exemplary embodiments of the dimensions for these parts are shown below.

[0168] Dimensions of portion 1 - lower surface 34 to end of tip 36 = 7.870 mm ± 0.125 mm to 14.870 mm ± 0.125 mm;

[0169] Dimensions of portion 2 - diameter or major axis length of end 36 = 4.615 mm ± 0.050 mm to

[0170]

[0171] Dimensions of section 3 - width or minor axis length of end 36 = 3.650 mm ± 0.050 mm to

[0172]

[0173] The size of the portion 4 - the width or minor axis length of the tines 38a and / or tines 38b [e.g., the front side extent / the rear side extent] = 3.650 mm ± 0.050 mm to

[0174] Size of portion 5 - diameter or major axis length of tines 38a to 38b [e.g. inner extent / outer extent] = 10.600 mm ± 0.125 mm to

[0175] Section 6 - It is desirable to provide a radius between the tip and the shoulder.

[0176] Although the above embodiments focus on the cap element 20 in the context of an impact device 52, the concepts of the cap element 20 can be applied to other surgical instrument contexts where impact or other high and / or varying force levels need to be applied. Further examples of this can include acetabular shell inserters, acetabular poly-liner inserters, acetabular drill holders, etc.

[0177] While the present disclosure has been illustrated and described in detail in the drawings and foregoing description, such illustration and description should be regarded as illustrative rather than restrictive in nature, and it should be understood that only illustrative embodiments have been shown and described and that all changes and modifications made within the spirit of the present disclosure should be protected.

[0178] The present disclosure has a number of advantages arising from the various features of the devices, systems and methods described herein. It should be noted that alternative embodiments of the devices, systems and methods of the present disclosure may not include all of the features described, but may still benefit from at least some of the advantages of these features. Those of ordinary skill in the art can easily design their own implementations of the devices, systems and methods that can incorporate one or more of the features of the present invention and fall within the spirit and scope of the present disclosure.

Claims

1. A surgical component mounting system, the system comprising: a surgical instrument having a proximal end and a distal end, the distal end of the surgical instrument providing a first portion of a mounting member; An intermediate component, the intermediate component having a proximal end, the proximal end of the intermediate component providing the second part of the mounting member, the intermediate component having a distal end, the distal end of the intermediate component being provided with the first part of a second mounting member; wherein the first part of the mounting member and the second part of the mounting member are detachable.

2. The surgical component mounting system of claim 1, wherein: The intermediate component is a single surgical occasion component and the intermediate component is provided with one or more characteristics that prohibit the intermediate component from being used as a multiple surgical occasion component.

3. The surgical component mounting system of claim 2, wherein: The one or more characteristics are characteristics that are susceptible to change under one or more conditions, and the one or more conditions are one or more of the following: i. one or more conditions to which the intermediate component is subjected in preparation for reuse; ii. the washing temperature of the intermediate component; iii. exposing the intermediate member to one or more chemicals; iv. exposing the intermediate member to a sterilizing temperature; v. Exposing the intermediate component to sterilization temperature.

4. A surgical component mounting system according to claim 2 or claim 3, wherein: The one or more characteristics are one or more visual indicia.

5. The surgical component mounting system according to any one of claims 2 to 4, wherein: The one or more characteristics are changeable parts of the intermediate component and the one or more characteristics are parts of the intermediate component that change profile and / or shape and / or cease to exist and / or cease to function.

6. A surgical component mounting system according to any one of the preceding claims, wherein: The removable mounting is adapted to restrict axial movement of the surgical component and the intermediate component relative to each other in one or two axial directions in the engaged state.

7. A surgical component mounting system according to any one of the preceding claims, wherein: The intermediate component is a cover element.

8. A surgical component mounting system according to any one of the preceding claims, wherein: The intermediate component provides a body portion, a recess in the body portion, and wherein the recess is provided with one or more retaining elements.

9. The surgical component mounting system of claim 8, wherein: The recessed portion is provided with one or more protrusions extending inwardly.

10. A surgical component mounting system according to any one of the preceding claims, wherein: The distal end of the intermediate element provides a first portion of the second mount, the first portion comprising one or more projections extending in a distal direction.

11. The surgical component mounting system of claim 10, wherein: The first portion of the second mounting member includes a main protrusion and one or two or more secondary protrusions, wherein the main protrusion is disposed between the two or more secondary protrusions.

12. A surgical component mounting system according to any one of the preceding claims, wherein: The surgical instrument is an orthopaedic instrument and / or wherein the surgical instrument is an impactor instrument for applying an axial force or a substantially axial force.

13. A surgical component mounting system according to any one of the preceding claims, wherein: The intermediate component can be connected to the implant and / or the femoral implant and / or the acetabular cup and / or the acetabular shell.

14. A method of mounting a surgical instrument using a surgical component mounting system, the method comprising: providing a surgical instrument having a proximal end and a distal end, the distal end of the surgical instrument providing a first portion of a mounting member; providing an intermediate component having a proximal end, the proximal end of the intermediate component providing the second portion of the mounting member, and a distal end of the intermediate component provided with the first portion of the second mounting member; The first portion of the mounting member and the second portion of the mounting member are connected, and the connection is detachable.

15. The method according to claim 14, wherein: The method includes one or more or all of the following: a) a disassembled state of the surgical instrument and the intermediate component, in which the surgical instrument and the intermediate component are separated from each other; b) a contact state of the surgical instrument and the intermediate component, in which a section of one of the surgical instrument and the intermediate component is inserted into the other of the intermediate component and the surgical instrument; c) an engaged state comprising inserting said one of said surgical instrument and said intermediate component into said other until no further insertion is possible.

16. The method according to claim 15, wherein: In the described engaged state: a) providing engagement between one or more retaining elements on the surgical instrument and / or one or more retaining elements on the intermediate component; and / or b) said engagement is provided by an interference fit between said surgical instrument and said intermediate component; and / or c) limiting axial movement of the surgical component and the intermediate component relative to each other in one or two axial directions.

17. The method according to any one of claims 14 to 16, wherein: The method provides: a) a second disassembled state of the combination of the surgical instrument and the intermediate component, in which the combination is separated from further surgical instruments and / or implants; and / or b) A second contact state of the surgical instrument and the intermediate component combination with a further surgical instrument and / or an implant.

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