Trial neck and method

Abstract

A trial neck (10) for hip surgery and a method of attaching the trial neck to a femoral canal instrument (60). The trial neck includes a body portion (4) including a bore (8) for receiving a proximal end (64) of a femoral canal instrument. The trial neck also includes an elongated neck (2) extending from the body portion. The trial neck further includes a locking mechanism (20) comprising a lever (20). The lever has a first end (24). The lever also has a second end (22). The lever further includes an engagement surface (26). The second end of the lever is operable to bias the engagement surface against the proximal end of the femoral canal instrument to secure the proximal end of the femoral canal instrument within the bore.

Description

Technical Field

[0001] (Cross - reference to related applications) This application is a partial continuation application of U.S. Patent Application No. 17 / 248,665, filed on February 2, 2021, the entire disclosure of which is incorporated herein by reference.

Background Art

[0002] This specification relates to a trial neck and a method of attaching a trial neck to a femoral canal instrument.

[0003] Total hip arthroplasty is a surgical procedure that replaces the hip joint with an artificial joint implant. Total hip replacement includes implanting an acetabular cup implant into the patient's acetabulum and implanting a prosthesis into the patient's femur. The prosthesis typically includes a stem received within the medullary canal of the femur and a head having a bearing surface received within the acetabulum or the acetabular cup implant. The prosthesis typically also includes a neck extending between the proximal end of the stem and the head.

[0004] The success of total hip arthroplasty requires accurate positioning and alignment of the acetabular cup implant as well as the prosthesis itself. Misalignment and / or inappropriate size selection of the acetabular cup implant and / or the prosthesis can lead to restricted movement of the prosthesis and / or accelerated wear and fracture of the bearing surface of the bearing surface of the head of the acetabular cup implant. To achieve this accurate positioning and alignment, various factors are involved. At least some of these factors relate to the neck of the prosthesis. These factors may include, for example, the length (offset) of the neck and the angular orientation of the neck relative to the stem.

[0005] Hip replacement surgery typically involves testing various components of the acetabular cup implant and prosthesis. As part of this, the femoral canal can be prepared using broach / reamers of various sizes. Once the broach / reamer is inserted into the femur, trial necks and heads may also be attached to the broach / reamer to evaluate whether a prosthesis with that type of neck and head is suitable for the patient (for example, in terms of neck size and offset).

[0006] After the surgeon is satisfied that the selected combination of broach / reamer, trial neck, and trial head has been precisely positioned and aligned, they can be removed and replaced with the implant itself. [Overview of the project] [Means for solving the problem]

[0007] The aspects of this disclosure are described in the attached independent and dependent claims. Combinations of features from the dependent claims may be combined with features of the independent claims as appropriate, and are not limited to those expressly described in the claims.

[0008] According to one aspect of this disclosure, a trial neck for hip joint surgery is provided, and the trial neck is The main body portion includes a hole for receiving the proximal end of the femoral tube device, The long, slender neck extends from the main body, A locking mechanism including a lever, where the lever is First end, The second end, and A locking mechanism having an engaging surface, A trial neck in which the second end of the lever is operable to bias the engaging surface against the proximal end of the femoral tube device, thereby fixing the proximal end of the femoral tube device in the hole.

[0009] The lever in the trial neck locking mechanism can provide a secure method for attaching the trial neck to the femoral tube apparatus. The lever allows for sufficient fixing force to be applied to the femoral tube apparatus within the orifice, while also allowing for fine adjustments.

[0010] The locking mechanism may further include an actuation member for engaging with the second end of the lever to actuate the lever. This can provide a convenient way to operate the lever.

[0011] The trial neck may include further holes. The actuarial member may extend into the further holes. The further holes may extend into an elongated neck.

[0012] Further holes may extend substantially parallel to the longitudinal axis of the elongated neck.

[0013] The proximal end of the elongated neck may have an opening leading to a further hole. The proximal end of the actuator may include a connecting feature for connecting a tool to the actuator in order to actuate the actuator.

[0014] The proximal end of the elongated neck may be configured to be attached to a trial head.

[0015] Further holes may have threaded surfaces. The actuator may have threaded surfaces for engaging with the threaded surfaces of the further holes, so that the actuator can be rotated to move along the further holes and engage with the second end of the lever. The threaded engagement of the actuator may allow for fine adjustment of the lever's position.

[0016] The trial neck may have a window for viewing the working members in further holes. This may also be useful for cleaning the trial neck during surgical procedures.

[0017] The first end of the lever may be located on the side of the trial neck.

[0018] The engaging surface of the lever may be curved to conform to the curved outer surface of the proximal end of the femoral component.

[0019] The inner surface of the hole may have a contoured surface for engaging the corresponding contoured outer surface of the proximal end of the femoral component to prevent rotation of the femoral component relative to the trial neck about the longitudinal axis of the femoral component.

[0020] The first end of the lever may be integral with the body portion. The engaging surface may be located intermediate the first end and the second end of the lever.

[0021] The second end of the lever may be disposed within the elongated neck.

[0022] The lever may include at least one dog leg bend, thereby optimizing the lever arm provided by the lever.

[0023] The femoral component may be an implant, such as a stem implant. The femoral component may be a femoral preparation instrument, such as a reamer, trial stem, or broach.

[0024] The first end of the lever may be pivotally attached within the trial neck.

[0025] The actuating member may have a distal end for engaging the second end of the lever to actuate the lever. The distal end may include a recess for engaging a corresponding protrusion on the second end of the lever to move the engaging surface away from the proximal end of the femoral component when pulling the actuating member along an additional hole.

[0026] The second end of the lever may include an actuating member receiving opening.

[0027] The first end of the lever can include a grippable feature for manually actuating the lever to move the engagement surface away from the proximal end of the femoral canal instrument.

[0028] The second end of the lever can include an inclined surface facing toward the hole, such that when the proximal end of the femoral canal instrument is inserted into the hole, the proximal end of the femoral canal instrument rests on the inclined surface to pivot the lever and enable the engagement surface to move away from the proximal end of the femoral canal instrument.

[0029] The lever can further include a biasing element for biasing the first end of the lever toward the hole, thereby biasing the engagement surface away from the hole.

[0030] According to another aspect of the present invention, a surgical kit is provided, the surgical kit comprising a trial neck of the type described above, and a femoral canal instrument.

[0031] The proximal end of the femoral canal instrument may include a circumferential lip or groove for engaging the engagement surface of the locking mechanism of the trial neck. The engagement surface can catch on the lip or groove when the locking mechanism is locked and resist the proximal end of the femoral canal instrument from disengaging from the hole.

[0032] The femoral canal instrument may be, for example, an implant such as a stem implant. The femoral canal instrument may be, for example, a femoral canal preparation instrument such as a reamer, a trial stem, or a broach.

[0033] According to a further aspect of the present disclosure, a method of attaching a trial neck to a femoral canal instrument is provided, the trial neck comprising a body portion including a hole for receiving the proximal end of the femoral canal instrument, an elongated neck extending from the body portion, and a locking mechanism including a lever, the lever having a first end, a second end, and A locking mechanism having an engaging surface, The second end of the lever is operable to bias the engaging surface against the proximal end of the femoral tube device, thereby fixing the proximal end of the femoral tube device in the hole. The method is, Insert the proximal end of the femoral tube device into the hole, This includes acting on the second end of the lever to bias the engaging surface toward the proximal end of the femoral tube device.

[0034] The lever in the trial neck locking mechanism can provide a secure method for attaching the trial neck to the femoral tube apparatus. The lever allows for sufficient fixing force to be applied to the femoral tube apparatus within the orifice, while also allowing for fine adjustments.

[0035] This method may include engaging the actuating member of the locking mechanism with the second end of the lever to actuate the lever. This can provide a convenient way to operate the lever.

[0036] The proximal end of the actuating member may include a connection feature. The method may further include connecting a tool to the connection feature in order to actuate the actuating member.

[0037] This method may further include viewing the working member through a window in the elongated neck of the trial neck.

[0038] The engaging surface of the lever may be curved to conform to the curved outer surface of the proximal end of the femoral tube device.

[0039] The first end of the lever may be integrated with the main body. The engagement surface may be located midway between the first end of the lever and the second end of the lever.

[0040] The first end of the lever may be pivotably mounted within the trial neck.

[0041] The femoral canal device may be an implant, such as a stem implant. The femoral canal device may also be a femoral canal preparation device, such as a reamer, trial stem, or broach. [Brief explanation of the drawing]

[0042] Embodiments of this disclosure will be described below, merely as examples, with reference to the attached drawings. In the drawings, similar reference numerals refer to similar elements. [Figure 1] This is a diagram of a trial neck attached to a femoral tube instrument such as a reamer, according to an embodiment of the present disclosure. [Figure 2] This is another diagram of the trial neck shown in Figure 1. [Figure 3] Figure 1 is a front view of the trial neck. [Figure 4A] Figure 1 is a top view of the trial neck. [Figure 4B] Figure 1 is a bottom view of the trial neck. [Figure 4C] Figure 1 is an inside view of the trial neck. [Figure 5] Figure 1 is a cross-sectional view of the trial neck. [Figure 6] This is another cross-sectional view of the trial neck in Figure 1, passing through the plane VV shown in Figure 5. [Figure 7] Figure 1 is a cross-sectional view of the trial neck, showing the contoured surface of the hole in the trial neck for engaging with the corresponding contour surface of the femoral canal instrument. [Figure 8] This is a cross-sectional view of a trial neck according to another embodiment of the present disclosure. [Figure 9] This figure shows some of the components of the trial neck in Figure 8 in more detail. [Figure 10] This is a cross-sectional view of the trial neck in the unlocked configuration shown in Figure 8. [Figure 11] This is a cross-sectional view of the trial neck in the locked configuration shown in Figure 8. [Figure 12]This is a cross-sectional view of a trial neck according to a further embodiment of the present disclosure. [Figure 13] This is a cross-sectional view of a trial neck according to another embodiment of the present disclosure. [Figure 14] This is a cross-sectional view of a trial neck according to a further embodiment of the present disclosure. [Figure 15] This is a cross-sectional view of a trial neck according to another embodiment of the present disclosure. [Figure 16] This is a cross-sectional view of a trial neck according to a further embodiment of the present disclosure. [Modes for carrying out the invention]

[0043] Embodiments of this disclosure will be described below with reference to the attached drawings.

[0044] Various diagrams of the trial neck 10 and femoral tube device according to embodiments of this disclosure are shown in Figures 1 to 7. In the drawings, the following directions are indicated: ·Inward direction 82, 84 horizontally, • Upward 86, and ·Downward 88.

[0045] The femoral canal device may be, for example, a femoral canal preparation device such as a reamer, trial stem, or broach. Alternatively, the femoral canal device may be an implant such as a stem implant.

[0046] In the following description of Figures 1 to 7, the femoral canal device is a femoral canal preparation device including a reamer 60. However, in other embodiments, the femoral canal device may be another device, such as one of the devices described above, and may have a proximal end configured similarly to the proximal end 64 of the reamer 60.

[0047] The trial neck 10 has a body portion 4. The body portion 4 includes a hole 8. The hole 8 may be a blind hole (closed at its proximal end), but in the embodiment shown in the figure, the hole 8 is an open hole that completely penetrates the body portion 4. The hole 8 can receive the proximal end of a reamer 60 for mounting the reamer 60 to the trial neck 10. As shown in Figure 5, in some embodiments, the hole may include an internal lip or shoulder portion 63 that includes a constricted portion of the hole 8. The lip or shoulder portion 63 may engage with a corresponding lip or shoulder portion that includes a wider portion of the proximal end 64 of the femoral tube instrument to act as a complete stop portion that prevents the proximal end 64 from completely passing through the hole 8.

[0048] The reamer 60 itself may be in the form of an elongated shaft (see, for example, Figure 1) and may have a cutting surface 68 located distally. The reamer 60 may also have an intermediate portion 66 located proximal to the cutting surface 68. The reamer 60 has a proximal end 64. The proximal end 64 may be located proximal to the cutting surface 68 and / or the intermediate portion 66. The proximal end 64 may be substantially cylindrical with a circular cross-section, but this is not required. The proximal end 64 can be inserted into the hole 8 of the trial neck 10 to mount the reamer 60 to the trial neck, as will be described in more detail below.

[0049] As shown in Figure 5, the proximal end 64 of the reamer 60 may include several features. For example, the proximal end 64 may have a connection feature 62, such as a contoured hole, for attaching the reamer 60 to a reamer driver. The hole in the connection feature 62 may include a female thread 65 to assist in attaching auxiliary equipment such as a reamer driver. In embodiments in which the hole 8 extends completely through the main body portion 8, the reamer driver may be attached to the reamer 60 using the connection feature 62, even if the trial neck 10 is attached to the reamer 60.

[0050] The proximal end 64 of the reamer 60 may also include a circumferential lip or groove 70 for engaging with the engaging surface of the locking mechanism of the trial neck 10, which will be described in detail below. As shown in Figure 5, the lip or groove 70 may be formed by the circumferential edge of the proximal end 64 of the reamer 60, which has a gradual increase (or decrease) in the radius of the proximal end 64.

[0051] In some embodiments, the reamer 60 may include an angled surface that conforms to the engaging surface of the locking mechanism at an angle at which the engaging surface contacts the reamer 60. The inclined surface may include a circumferential (e.g., annular) recess extending around the reamer 60 (much like the lip or groove 70). In this way, the contact surface area between the reamer 60 and the engaging surface can be maximized, and potential damage to the surface of the reamer 60 (caused by the engaging surface "biting" into the reamer 60) can be avoided. In some embodiments, the engaging surface and the inclined surface can cooperate to bias the internal lip or shoulder 63 against the corresponding lip or shoulder of the proximal end 64, thereby locking the proximal end 64 so as not to move in either axial direction within the hole 8.

[0052] The trial neck 10 also has an elongated neck 2. The elongated neck 2 extends from the main body portion 4. The elongated neck 2 extends at a non-zero angle with respect to the longitudinal axis of the hole 8. The proximal end 16 of the elongated neck 2 may be configured to be attached to a trial head (i.e., including a connection feature(s)).

[0053] The trial neck 10 may include one or more external marks 14 to indicate information regarding the type or dimensions of the trial neck 10. In the embodiments shown in Figures 1 to 7, one such mark 14 is located on the proximal (upper) surface of the trial neck 10, but other locations of such marks are also possible.

[0054] As described above, the proximal end 64 of the reamer 60 may be received in the hole 8 for mounting the reamer 60 to the trial neck 10. According to embodiments of the present disclosure, the trial neck 10 includes a locking mechanism. The locking mechanism can be used to lock the proximal end 64 of the reamer 60 in the hole 8 to prevent movement of the reamer 60 relative to the trial neck 10 and / or accidental separation of the trial neck 10 from the reamer 60.

[0055] The locking mechanism includes a lever 20. The lever 20 has a first end 24, a second end 22, and an engagement surface 26. The first end 24 may be positioned laterally with respect to the engagement surface 26 and the second end 22. The engagement surface 26 may be positioned laterally with respect to the second end 22.

[0056] In this embodiment, the first end 24 is integral with the main body portion 4. As can be seen from examining Figures 2, 3, 6, and 7, the first end 24 of the lever 20 may comprise a pair of arms, each of which extends around the hole 8 and joins the main body portion 4 at a point located substantially laterally on the trial neck 10. The points where the first end 24 (the pair of arms) joins the main body portion 4 may form a hinge for a live spring.

[0057] In this embodiment, the second end 22 is located within the elongated neck 2 of the trial neck 10, but it may also be located within the body portion 4. By locating the second end 22 within the elongated neck 2, the second end 22 can be sufficiently separated from the engagement surface 26, thereby improving the mechanical advantages provided by the lever 20 compared to the position of the second end 22 of the lever 20 within the body portion 4.

[0058] In this embodiment, the engaging surface 26 is positioned midway between the first end 24 and the second end 22. In this embodiment, the engaging surface 26 is positioned adjacent to the side wall of the hole 8, allowing the engaging surface 26 to contact and bias the proximal end 64 of the reamer 60 in order to fix the proximal end 64 of the reamer 60 in the hole 8 when the lever 20 is actuated.

[0059] In this embodiment, the aforementioned pair of arms of the lever 20 extending around the hole 8 extend generally laterally 84 from the portion of the lever 20 including the engagement surface 26 so as to join with the main body portion 4 at the first end 24. The portion of the lever 20 between the engagement surface 26 and the second end 22 may comprise a single solid piece that branches at the engagement surface 26 to form the pair of arms. Thus, the lever may be substantially fork-shaped or Y-shaped when viewed along the longitudinal axis of the hole 8.

[0060] As can be seen from the figure, the portion of the lever 20 between the engagement surface 26 and the second end 22 may include several dogleg-shaped bends. This allows for mechanical advantages to be obtained from the operation of the second end 22 of the lever 20, as will be described below, while also allowing the lever 20 to move at the aforementioned non-zero angle between the elongated neck 2 and the longitudinal axis of the hole 8.

[0061] As can be seen from the figure, the lever 20 may be located in a slot formed in the side wall of the trial neck 10. The slot may be sized to have sufficient clearance to ensure that the lever 20 can be operated without soiling the side of the slot during operation of the locking mechanism. The slot may also be sized to provide adequate support for the lever 20 during cleaning of the trial neck 10.

[0062] In some embodiments, the locking mechanism also includes an actuating member 30. The actuating member 30 can be used to actuate the second end of the lever 20.

[0063] In this embodiment, the trial neck 10 has a further hole 15 through which the actuarial member 30 extends. The further hole 15 may extend substantially parallel to the (longitudinal) neck axis of the elongated neck 2. The further hole 15 may terminate at the proximal end 16 of the elongated neck 2. In this embodiment, the entrance opening of the further hole 15 located at the proximal end 16 of the elongated neck 2 may allow access to the actuarial member 30. The proximal end of the actuarial member 30 may have a connection feature 32 for connecting the corresponding connection feature 52 of a tool 50 to the actuarial member 30 in order to actuate the actuarial member 30. In some embodiments, a trial head that can be attached to the proximal end 16 of the elongated neck 2 may include an opening or opening through the trial head, which provides access to the connection feature 32 for operating the actuarial member 30. For example, a tool 50 can be inserted through the opening or opening of the trial head to connect the connection feature 52 to the connection feature 32. In some embodiments, the tool 50 may be incorporated into the trial head itself.

[0064] To operate the actuarial member 30, the actuarial member 30 may be moved along the further hole 15 (in the direction indicated by arrow "A" in Figure 5, which in this embodiment is substantially parallel to the longitudinal axis of the elongated neck 2) toward the second end 22 of the lever 20. Thus, the tip 34 comes into contact with the second end 22 of the lever 20, thereby causing the lever 20 to flex. This causes the lever 20 to rotate around the first end 24 of the lever 20 (in the direction indicated by arrow "B" in Figure 5). This subsequently biases the engaging surface 26 toward the proximal end 64 of the reamer 60, locking the proximal end 64 into the hole 8.

[0065] Further holes 15 may have threaded surfaces 18 for engaging with the corresponding threaded surfaces 38 of the actuating member 30. Rotation of the actuating member 30 within the further holes 15 (e.g., using a tool 50) causes the actuating member to move back and forth within the further holes 15 and along direction "A" as described above, thereby operating the lever 20.

[0066] In some embodiments, the trial neck may have one or more windows. For example, the trial neck 10 in the embodiment shown in the figure has a window 12 located on the elongated neck 2. The window 12 may open on both the front and rear surfaces of the elongated neck 10. The window 12 may allow viewing of the actuator 30 in a further hole 15. This may allow the position of the actuator 30 in the further hole 15 to be determined by inspection. The window 12(s) may also allow improved access to the interior of the trial neck 10 (particularly the further hole 15) for cleaning. It should be noted that the aforementioned slot in which a lever 20 may be located may similarly allow access to the interior of the trial neck 10 for improved cleaning.

[0067] In some embodiments, the engagement surface 26 of the lever 20 may be curved (this embodiment in this embodiment can be seen in Figures 6 and 7). This curvature may allow the engagement surface to substantially coincide with the curved outer surface of the proximal end 64 of the reamer 60. By coinciding with the curved outer surface of the proximal end 64 of the reamer 60, the size of the engagement area between the engagement surface 26 and the proximal end 64 is increased, making the connection between the trial neck 10 and the reamer 60 more secure. Note that in some embodiments, a portion of the engagement surface 26 located on the aforementioned pair of arms of the lever 20 may form at least a portion of the curved engagement surface 26.

[0068] The locking mechanism described above largely resists the movement of the reamer 60 along the longitudinal axis of the hole 8, thereby preventing accidental movement of the trial neck 10 relative to the reamer 60 and / or preventing the proximal end of the reamer 60 from inadvertently disengaging from the hole 8. In some embodiments, the trial neck 10 and / or the reamer 60 may be equipped with features to resist rotation of the reamer 60 within the hole 8 (i.e., around the longitudinal axis of the hole 8). It should be noted that even in the absence of such additional features, the frictional force associated with biasing the engagement surface 26 against the proximal end of the reamer 60 can also resist rotation of the reamer 60 within the hole 8 to some extent.

[0069] In the embodiments shown in Figures 1 to 7 (in particular, see Figures 4A, 4B, and 7), the inner surface of the hole 8 has a contoured surface 87 for engaging with the corresponding contoured outer surface 67 of the proximal end 64 of the reamer 60 (see Figures 3 and 6). The engagement of these contoured surfaces 67 / 87 can resist rotation of the reamer 60 relative to the trial neck 10 about the longitudinal axis of the hole 8 / reamer 60, as described above. The contoured surface 67 on the reamer 60 may extend entirely along the periphery of the proximal end 64 of the reamer 60 (as seen in Figure 6), so that a portion of the contoured surface 67 may be presented to the contoured surface 87 of the trial neck 10 regardless of the orientation of the proximal end 64 of the reamer 60 when the reamer 60 is first inserted into the hole 8.

[0070] As shown in Figure 7, the contoured surface 87 does not need to extend around the entire perimeter of the hole 8, but may instead be present only on the segment containing the hole 8 (in Figure 7, the segment containing the contoured surface 87 is the innermost part of the inner surface of the hole 8). Furthermore, as shown in Figure 7, the contoured surface 87 may extend along the entire length of the inner surface of the hole 15. In the embodiments shown in Figures 1 to 7, the contoured surface 87 extends from the proximal end to the distal end of the hole 8, and a portion of the contoured surface 87 is located on the engagement surface 26. However, it is also conceivable that the contoured surface 87 may be located only on the engagement surface 26.

[0071] As described above, the proximal end 64 of the reamer 60 may include a circumferential lip or groove 70 for engaging with the engagement surface of the locking mechanism of the trial neck 10. As shown in Figure 5, the lip or groove 70 may be formed by the periphery of the circumferential portion of the proximal end 64 of the reamer 60 having a gradual increase (or decrease) in the radius of the proximal end 64. In some embodiments, a contoured surface 67 may be located on this lip and / or within this groove 70 for engaging with (part of) a contoured surface 87 on the engagement surface 26 of the lever 20. It should be noted that in some embodiments, the engagement surface catches on the lip or groove 70 when the locking mechanism is locked (for example, a portion of the lever 20 including the engagement surface 26 enters the groove 70), resisting the proximal end 64 of the reamer 60 from disengaging from the hole 8. In this way, in addition to the frictional force applied by the engagement surface 26, the engagement surface 26 can physically prevent the proximal end 64 of the reamer 60 from disengaging from the hole 8.

[0072] The contoured surfaces 67 / 87 may have splines of corresponding shapes extending substantially parallel to the longitudinal axes of the reamer 60 and the hole 8. Other types of contoured surfaces may be used. Note that (part of) the contoured surface 87 on the engagement surface 26 may form one or more teeth that engage with the contoured surface 67 on the proximal end 64 of the reamer 60 (see, for example, Figure 6).

[0073] Figure 8 shows a cross-section of a trial neck according to another embodiment of the present disclosure. Figure 9 shows some of the components of the trial neck of Figure 8 in more detail. Figure 10 shows a cross-section of the trial neck of Figure 8 in an unlocked configuration, and Figure 11 shows a cross-section of the trial neck of Figure 8 in a locked configuration.

[0074] The femoral canal devices shown in Figures 8, 10, and 11 may also be femoral canal preparation devices including, for example, a reamer, trial stem, or broach. Alternatively, the femoral canal devices shown in Figures 8, 10, and 11 may be implants such as stem implants.

[0075] In the following description of Figures 8 to 11, the femoral tube device includes a reamer such as the reamer 60 shown in Figure 1. However, it will be understood that in other embodiments, the femoral tube device may be one of the other devices described above, and may have a proximal end configured similarly to the proximal end 64 of the reamer.

[0076] The trial neck 10 has a body portion 4. The body portion 4 includes a hole 8. The hole 8 may be a blind hole (closed at its proximal end), but in the embodiments shown in Figures 8, 10, and 11, the hole 8 is an open hole that completely penetrates the body portion 4. The hole 8 can receive the proximal end 64 of a reamer for mounting the reamer to the trial neck 10. As described above, the hole 8 may include an internal lip or shoulder that includes a constricted portion of the hole 8. The lip or shoulder may engage with a corresponding lip or shoulder that has a wider portion of the proximal end 64 of the femoral tube instrument to act as a complete stopper that prevents the proximal end 64 from completely passing through the hole 8.

[0077] The reamer itself may be in the form of an elongated shaft (see, for example, Figure 1) and may have a cutting surface 68 located distally. The femoral tube instrument 60 may also have an intermediate portion 66 located proximal to the cutting surface 68. The femoral tube instrument 60 has a proximal end 64. The proximal end 64 may be located proximal to the cutting surface 68 and / or the intermediate portion 66. The proximal end 64 may be substantially cylindrical with a circular cross-section, but this is not required. The proximal end 64 can be inserted into a hole 8 in the trial neck 10 to attach the femoral tube instrument 60 to the trial neck, as will be described in more detail below.

[0078] As can be seen from Figures 8, 10, and 11, the proximal end 64 of the reamer may include several features. For example, the proximal end 64 may have a connecting feature 62, such as a contoured hole, for attaching the reamer to a reamer driver. The hole in the connecting feature 62 may include a female thread to assist in attaching the reamer driver. In embodiments where the hole 8 extends completely through the body portion 4, the reamer driver may be attached to the reamer using the connecting feature 62, even if the trial neck 10 is attached to the reamer.

[0079] The proximal end 64 of the reamer may also include a circumferential lip or groove for engaging with the engaging surface of the locking mechanism of the trial neck 10, as described above in relation to Figures 1 to 7.

[0080] As described above, the reamer may include an angled surface that conforms to the engaging surface of the locking mechanism at an angle at which the engaging surface contacts the reamer. The inclined surface may include a circumferential (e.g., annular) recess extending around the reamer (much like the lip or groove 70). In this way, the contact surface area between the reamer and the engaging surface can be maximized and potential damage to the surface of the reamer (caused by the engaging surface "biting" into the reamer) can be avoided.

[0081] The trial neck 10 also has an elongated neck 2. The elongated neck 2 extends from the main body portion 4. The elongated neck 2 extends at a non-zero angle with respect to the longitudinal axis of the hole 8. The proximal end 16 of the elongated neck 2 may be configured to be attached to a trial head (i.e., including a connection feature(s)).

[0082] As described in relation to Figures 1 to 7, the trial neck 10 may include one or more external markings to indicate information about the type or dimensions of the trial neck 10.

[0083] As previously stated, the proximal end 64 of the reamer may be received in the hole 8 for mounting the reamer to the trial neck 10. According to embodiments of the present disclosure, the trial neck 10 includes a locking mechanism. The locking mechanism can be used to lock the proximal end 64 of the reamer in the hole 8 to prevent movement of the reamer relative to the trial neck 10 and / or accidental separation of the trial neck 10 from the reamer.

[0084] The locking mechanism includes a lever 20. The lever 20 has a first end 24, a second end 22, and an engagement surface 26. The first end 24 may be positioned above the engagement surface 26 and the second end 22. The engagement surface 26 may be positioned on the side of the lever 20 that faces laterally.

[0085] The lever 20 may be pivotably mounted within the trial neck 10, for example, within the main body portion 4 (for example, at the first end 24 of the lever 20). In the embodiments shown in Figures 8 to 16, the lever 20 is pivotably mounted within a cavity 90 located in a part of the main body portion 4 adjacent to the elongated neck 2 and adjacent to the hole 8. At least a portion of the cavity 90 may be open into the hole 8 so that the engaging surface 26 can engage with the proximal end 64 of the femoral tube instrument 60 when the femoral tube instrument 60 is received into the hole 8. As described above, this allows the engaging surface 26 to contact and bias the proximal end 64 of the femoral tube instrument 60 when the lever 20 is actuated, thereby fixing the proximal end 64 of the femoral tube instrument 60 within the hole 8.

[0086] The pivot mounting portion 92 may, for example, include a screw or bolt that penetrates the trial neck 10 in the front-rear direction. The pivot mounting portion 92 may also pass through a hole in the lever 20 so as to allow the lever to pivot substantially within the coronal plane.

[0087] In some embodiments, the locking mechanism also includes an actuating member 30. The actuating member 30 can be used to actuate the second end 22 of the lever 20, as will be described in more detail below. The actuating member 30 may be similar to the actuating member 30 described above in relation to the embodiments of Figures 1 to 7. Thus, the trial neck 10 may have a further hole 15 into which the actuating member 30 extends. The further hole 15 may extend substantially parallel to the (longitudinal) neck axis of the elongated neck 2. The further hole 15 may terminate at the proximal end 16 of the elongated neck 2. In this embodiment, the entrance opening of the further hole 15 located at the proximal end 16 of the elongated neck 2 may allow access to the actuating member 30. The proximal end of the actuating member 30 may have a connection feature 32 for connecting the corresponding connection feature 52 of the tool 50 to the actuating member 30 in order to actuate the actuating member 30. In some embodiments, a trial head attachable to the proximal end 16 of the elongated neck 2 may include an opening or opening through which the trial head passes, providing access to a connection feature 32 for operating the actuator 30. For example, a tool 50 can be inserted through the opening or opening of the trial head to connect the connection feature 52 to the connection feature 32. In some embodiments, the tool 50 may be incorporated into the trial head itself. Similar to the embodiments in Figures 1 to 7, the actuator 30 may include a threaded surface 17 that engages with a corresponding inner threaded surface of a further hole 15, so that rotation of the actuator 30 within the further hole 15 (e.g., using the tool 50) moves the actuator 30 along the further hole 15, thereby operating the lever 20.

[0088] To operate the actuarial member 30, the actuarial member 30 may be moved toward the second end 22 of the lever 20 along the further hole 15 (in the direction indicated by arrow "A" in Figure 8, which in this embodiment is substantially parallel to the longitudinal axis of the elongated neck 2). Thus, the tip 34 of the actuarial member 30 comes into contact with the second end 22 of the lever 20, thereby moving the lever 20. This causes the lever 20 to rotate around the pivot mounting portion 92 (in the direction indicated by arrow "B" in Figure 11). This subsequently biases the engaging surface 26 toward the proximal end 64 of the femoral tube device 60 (as indicated by the arrow labeled "C" in Figure 11), locking the proximal end 64 into the hole 8. To release the proximal end 64 of the femoral tube device 60, the actuarial member 30 may be pulled out along a further hole 15 (i.e., in the opposite direction to the direction indicated by the arrow labeled "A" in Figures 8, 10, and 11), allowing the lever 20 to pivot back in the opposite direction to the direction indicated by the arrow labeled "B" in Figure 11, thereby disengaging the engagement surface 26 from the proximal end 64.

[0089] As described above, in some embodiments, the engagement surface 26 of the lever 20 may be curved. This curvature may allow the engagement surface to substantially coincide with the curved outer surface of the proximal end 64 of the reamer 60. By coordinating with the curved outer surface of the proximal end 64 of the femoral tube device 60, the size of the engagement area between the engagement surface 26 and the proximal end 64 is increased, making the connection between the trial neck 10 and the femoral tube device 60 more secure.

[0090] Similar to the embodiments shown in Figures 1 to 7, the locking mechanism described above generally resists the movement of the femoral tube device 60 along the longitudinal axis of the hole 8, thereby preventing accidental movement of the trial neck 10 relative to the femoral tube device 60 and / or preventing the proximal end of the femoral tube device 60 from inadvertently disengaging from the hole 8. Also as described above, in some embodiments, the trial neck 10 and / or the femoral tube device 60 may be equipped with features to resist rotation of the femoral tube device 60 within the hole 8 (i.e., around the longitudinal axis of the hole 8). Note that even in the absence of such additional features, the frictional force associated with biasing the engagement surface 26 against the proximal end of the femoral tube device 60 can also resist rotation of the femoral tube device 60 within the hole 8 to some extent.

[0091] In the embodiments shown in Figures 8 to 16, the inner surface of the hole 8 may have a contoured surface of the type described above (e.g., contoured surface 87) to engage with the corresponding contoured outer surface (e.g., contoured outer surface 67) of the proximal end 64 of the femoral tube instrument 60. As described above, the engagement of these contoured surfaces can resist rotation of the femoral tube instrument 60 relative to the trial neck 10 about the longitudinal axis of the hole 8 / femoral tube instrument 60. Furthermore, as described above, it is assumed that the contoured surface (e.g., contoured surface 87) may be located only on the engagement surface 26.

[0092] In this case as well, the contoured surface may have splines of a corresponding shape that extend substantially parallel to the longitudinal axis of the femoral tube instrument 60 and the hole 8. Other types of contoured surfaces may be used. Note that (part of) the contoured surface 87 on the engagement surface 26 may form one or more teeth (see, for example, tooth 27 in Figure 9) that engage with the contoured surface on the proximal end 64 of the femoral tube instrument 60.

[0093] As described above in relation to the embodiments shown in Figures 1 to 7, the proximal end 64 of the femoral tube device 60 may include a circumferential lip or groove for engaging with the engaging surface of the locking mechanism of the trial neck 10.

[0094] In this embodiment, the actuator may include a widened portion 35 located midway between the proximal end and the tip portion 34 of the actuator 30. This widened portion 35 may have substantially the same diameter as the diameter of the further hole 15. This can help ensure that the longitudinal axis of the actuator 30 remains substantially parallel to the longitudinal axis of the further hole 15 while the actuator 30 moves within the further hole 15. At least some of the other portions of the actuator 30 may have a narrower profile than the profile of the further hole to reduce friction between the actuator 30 and the further hole 15.

[0095] In this embodiment, the lever 20 may include a feature portion to assist in the engagement of the second end 22 of the lever 20 with the tip 34 of the actuator 30. Referring to the cross-sectional views shown in Figure 9, and in Figures 8, 10, and 11, the second end 22 of the lever 20 in this embodiment includes an actuator receiving opening 96. The actuator receiving opening 96 is located inside the lever 20 and is positioned so that the tip 32 of the actuator 30 can slide within the actuator receiving opening 96 when the actuator 30 is moved in the direction indicated by the arrow labeled "A" in Figures 8, 10, and 11. The actuator receiving opening 96 may have a funnel-shaped outer shape to guide the tip 32 toward the inner surface 94. The tip 32 can engage with and bias toward the inner surface 94 in order to actuate the lever 20. The inner surface 94 itself may be angled such that, for example, when the engaging surface 26 engages with the proximal end 64 of the femoral tube device 60, the surface normal of the inner surface 94 is substantially parallel to the longitudinal axis of the actuator 30. The funnel-shaped outer form of the actuator receiving opening 96 and the aforementioned orientation of the inner surface 94 can help ensure that there is little or no movement of the actuator 30 and / or lever 20 outward from the coronal surface while the actuator 30 and lever 20 are being operated.

[0096] In some embodiments, features may be included to assist in the precise rotation of the lever 20. For example, a feature may be provided to prevent the lever 20 from interfering with the insertion of the femoral canal device 60 into or removal from the hole 8 at the proximal end 64. Specific embodiments of such features will be described here with reference to Figures 12 to 16.

[0097] Figure 12 shows a cross-section of the trial neck 10 according to a further embodiment of the present disclosure. The embodiment in Figure 12 is similar in many respects to the embodiments in Figures 8 to 11, and only the essential differences are described here.

[0098] In this embodiment, the second end 22 of the lever 20 includes an inclined surface 112. The inclined surface 112 faces the hole 8. When in use, when the proximal end 64 of the femoral tube device 60 is inserted into the hole 8, the proximal end 64 is biased against and rests on the inclined surface 112, thereby causing the lever 20 to pivot in the direction indicated by the arrow labeled "D" in Figure 12. This has the effect of moving the engaging surface 26 away from the proximal end 64 of the femoral tube device 60. This prevents the lever 20, particularly the engaging surface 26, from striking and damaging the proximal end 64 of the femoral tube device 60 when the femoral tube device 60 is inserted into the hole 8.

[0099] Although the inclined surface 112 has been described in relation to Figure 12, it should be understood that this type of inclined surface may be included in any of the embodiments shown in Figures 8 to 16.

[0100] Figure 13 shows a cross-section of the trial neck 10 according to another embodiment of the present disclosure. The embodiment in Figure 13 is similar in many respects to the embodiments in Figures 8 to 12, and only the essential differences are described here.

[0101] In this embodiment, the lever 20 further comprises a biasing element 104. In this embodiment, the biasing element 104 is mounted inside the first end 24 of the lever 20. The first end of the biasing element 104 can bias against the side wall 106 located inside the cavity 90, thereby biasing the lever 20 such that the first end 24 of the lever 20 is biased toward the hole 8, while the engaging surface 26 is biased toward the hole 8. In some embodiments, the first end of the biasing element 104 may be received in a blind hole located in the side wall located inside the cavity 90. Similarly, the second end of the biasing element 104 may be received in a blind hole located within the first end 24 of the lever 20.

[0102] The biasing element 104 can be operated to keep the engaging surface 26 away from the hole 8 before the actuation member 30 is activated. This prevents the engaging surface 26 from hitting and damaging the proximal end 64 of the femoral canal device 60 when the femoral canal device 60 is inserted into the hole 8.

[0103] Although the biasing element 104 has been described in relation to Figure 13, it will be understood that this type of biasing element may be included in any of the embodiments shown in Figures 8 to 16.

[0104] The biasing element in Figure 13 is equipped with a helical spring. However, it will be understood that other types of biasing elements may be used.

[0105] Figure 14 shows a cross-section of the trial neck 10 according to a further embodiment of the present disclosure. The embodiment in Figure 14 is similar in many respects to the embodiments in Figures 8 to 13, and only the essential differences are described here.

[0106] In this embodiment, instead of the helical spring described in relation to Figure 13, the biasing element 104 comprises a leaf spring. As seen in Figure 14, the leaf spring may include a meandering pattern. In this embodiment, the biasing element 104 may be formed integrally with the lever 20.

[0107] The (leaf spring) biasing element 104 has been described in relation to Figure 14, but it should be understood that this type of biasing element may be included in any of the embodiments shown in Figures 8 to 16.

[0108] Figure 15 shows a cross-section of the trial neck 10 according to another embodiment of the present disclosure. The embodiment in Figure 15 is similar in many respects to the embodiments in Figures 8 to 14, and only the essential differences are described here.

[0109] In this embodiment, the first end 24 of the lever 20 includes a grippable feature 102. The grippable feature 102 in this embodiment includes a projection that extends upward from the main body portion 4, allowing for manual manipulation by the surgeon. Other forms of grippable features (e.g., a contoured or roughened surface or a series of ridges) may be used.

[0110] The grippable feature 102 is manually operable by the surgeon to manually actuate the lever 20 so as to move the engaging surface 26 away from the proximal end 64 of the femoral tube instrument 60. In particular, the surgeon can use the grippable feature 102 to rotate the first end 24 of the lever toward the hole 8, thereby pivoting the engaging surface 26 away from the hole 8.

[0111] This ensures that, during use, the surgeon can ensure that the engaging surface 26 does not strike and damage the proximal end 64 of the femoral canal instrument 60 when it is inserted into the hole 8. The surgeon can also use the grippable feature 102 to ensure that the engaging surface 26 disengages from the proximal end 64 of the femoral canal instrument 60 before attempting to remove the proximal end 64 from the hole 8.

[0112] The grippable feature portion 102 has been described in relation to Figure 15, and it will be understood that this type of grippable feature portion can be included in any of the embodiments shown in Figures 8 to 16. In fact, the embodiments shown in Figures 13, 14, and 16 each include such a feature portion.

[0113] Figure 16 shows a cross-section of the trial neck 10 according to a further embodiment of the present disclosure. The embodiment in Figure 16 is similar in many respects to the embodiments in Figures 8 to 14, and only the essential differences are described here.

[0114] In this embodiment, the actuator 30 has a distal end (where the tip portion 32 is located) for engaging with the second end 22 of the lever 20 to actuate the lever 20. In this embodiment, the distal end also includes a recess 108. The recess 108 includes a constricted portion of the actuator 30 in this embodiment. The second end 22 of the lever 20 also includes a projection 95 corresponding to the recess 108.

[0115] In this embodiment, as the operating member 30 moves toward the second end 22 of the lever 20, the proximal edge 110 of the recess 108 contacts the projection 95, thereby biasing the engagement surface 26 toward the proximal end 64 of the femoral tube device 60 (see Figure 16).

[0116] The recess 108 can also be operated to pivot the lever 20 such that the engaging surface 26 moves away from the proximal end 64 of the femoral tube device 60 when the actuating member 30 is withdrawn along the further hole 15. Specifically, when the actuating member 30 is withdrawn along the further hole 15, the distal edge 114 of the recess 108 contacts the projection 95, thereby pivoting the lever 20 and moving the engaging surface 26 away from the proximal end 64 of the femoral tube device 60.

[0117] Therefore, the recess 108 and the corresponding projection 95 can cooperate to ensure that the engaging surface 26 disengages from the proximal end 64 of the femoral tube device 60 so as not to obstruct the removal of the proximal end 64 of the hole 8.

[0118] While recesses and corresponding protrusions have been described in relation to Figure 16, it will be understood that this type of recess and corresponding protrusion may be included in any of the embodiments shown in Figures 8 to 16. In fact, the embodiment shown in Figure 15 includes such features. Specifically, in Figure 15, the tip 32 of the actuator 30 is substantially spherical. This forms a neck located immediately proximal to the tip 32, and the neck constitutes the recess of the type described above. The corresponding protrusion in this embodiment may be formed by the lip of the actuator receiving opening 96 described above. In this embodiment, when the actuator 30 is withdrawn along the further hole 15, the recess formed by the neck can act against the lip of the actuator receiving opening 96, thereby rotating the engaging surface 26 of the lever 20 away from the femoral tube instrument 60. Here again, this can prevent the engaging surface 26 from becoming stationary relative to the femoral tube instrument 60, which would otherwise hinder the precise removal of the proximal end 64 of the femoral tube instrument 60 from the hole 8.

[0119] Embodiments of the present disclosure may provide a method for attaching a trial neck (e.g., a trial neck 10 of the type described above in relation to Figures 1 to 16) to a femoral tube instrument (such as a reamer 60 or any of the other femoral tube instruments described above). The method may also include inserting the proximal end 64 of the femoral tube instrument (e.g., a reamer 60) into the hole 8 of the trial neck 10. The method may also include acting on the second end 22 of the lever 20 to bias the engagement surface 26 against the proximal end 64 of the femoral tube instrument (e.g., a reamer 60).

[0120] As described above, the method may include using an actuating member, for example, actuating member 30, to actuate the second end 22 of the lever 20. The method may also include connecting a tool (for example, tool 50) to the connecting feature 32 of the actuating member 30 in order to actuate the actuating member 30. While using the trial neck 10, the method may also include viewing the actuating member 30 through a window (for example, window 12) in the elongated neck 2 of the trial neck 10. The method may further include cleaning the trial neck 10 before using it (again). Window 12 may assist in this cleaning by allowing improved access to a further hole 15 in which the actuating member 30 may be positioned.

[0121] According to one embodiment of the present disclosure, a surgical kit may be provided. The surgical kit may include a trial neck 10 of the type described above in relation to Figures 1 to 16. The surgical kit may also include a femoral cannula instrument of the type described above (e.g., a reamer 60). It is envisioned that the kit may include further components (e.g., one or more trial necks of different sizes of the type described above, one or more femoral cannula instruments of different types (e.g., different reamers), one or more trial heads, and / or any other components).

[0122] The above describes a trial neck for hip joint surgery and a method for attaching the trial neck to a femoral canal device. The trial neck includes a main body portion including a hole for receiving the proximal end of a femoral canal device. The trial neck also includes an elongated neck extending from the main body portion. The trial neck further includes a locking mechanism comprising a lever. The lever has a first end, which may be integral with the main body portion or pivotably mounted. The lever also has a second end. The lever further has an engagement surface, which may be located midway between the first and second ends, or located at the second end. The second end of the lever is actuated to bias the engagement surface toward the proximal end of the femoral canal device, thereby securing the proximal end of the femoral canal device in the hole.

[0123] While specific embodiments of this disclosure have been described, it will be understood that many modifications, additions, and / or substitutions are possible within the scope of the claims.

[0124] [Implementation Method] (1) A trial neck for hip joint surgery, The main body portion includes a hole for receiving the proximal end of the femoral tube device, A long, slender neck extending from the main body, A locking mechanism including a lever, wherein the lever is First end, The second end, and A locking mechanism having an engaging surface, A trial neck in which the second end of the lever is operable to bias the engaging surface toward the proximal end of the femoral tube device, thereby fixing the proximal end of the femoral tube device within the hole. (2) The trial neck according to Embodiment 1, wherein the locking mechanism further includes an actuation member for engaging with the second end of the lever to actuate the lever. (3) The trial neck according to Embodiment 2, further comprising a hole, wherein the operating member extends into the further hole. (4) The trial neck according to Embodiment 3, wherein the further hole extends within the elongated neck. (5) The trial neck according to Embodiment 4, wherein the further hole extends substantially parallel to the longitudinal axis of the elongated neck.

[0125] (6) The trial neck according to Embodiment 4, wherein the proximal end of the elongated neck has an opening leading to the further hole, and the proximal end of the actuator has a connecting feature for connecting a tool to the actuator in order to actuate the actuator. (7) The trial neck according to embodiment 6, wherein the proximal end of the elongated neck is configured to be attached to a trial head. (8) The further hole has a threaded surface, A trial neck according to any one of Embodiment 3, wherein the actuating member has a threaded surface for engaging with the threaded surface of the further hole, in order to allow the actuating member to rotate and move along the further hole to engage with the second end of the lever. (9) A trial neck according to any of the embodiments of 3, comprising a window for viewing the operating member in the further hole. (10) The trial neck according to Embodiment 1, wherein the first end of the lever is located on the side surface of the trial neck.

[0126] (11) The trial neck according to Embodiment 1, wherein the engaging surface of the lever is curved to fit the curved outer surface of the proximal end of the femoral tube device. (12) The trial neck according to Embodiment 1, wherein the inner surface of the hole has a contoured surface for engaging with the corresponding contoured outer surface of the proximal end of the femoral tube instrument in order to prevent the femoral tube instrument from rotating relative to the trial neck about the longitudinal axis of the femoral tube instrument. (13) The trial neck according to Embodiment 1, wherein the first end of the lever is integral with the main body portion, and the engaging surface is located midway between the first end of the lever and the second end of the lever. (14) The trial neck according to embodiment 13, wherein the second end of the lever is located within the elongated neck. (15) The trial neck according to embodiment 13, wherein the lever includes at least one dog leg bend.

[0127] (16) The trial neck according to Embodiment 1, wherein the first end of the lever is pivotably mounted within the trial neck. (17) The trial neck according to embodiment 16, wherein the actuating member has a distal end for engaging with the second end of the lever to actuate the lever, and the distal end includes a recess for engaging with a corresponding projection on the second end of the lever to move the engaging surface away from the proximal end of the femoral tube device when the actuating member is withdrawn along the further hole. (18) The trial neck according to embodiment 16, wherein the second end of the lever includes an operating member receiving opening. (19) The trial neck according to embodiment 16, wherein the first end of the lever includes a grippable feature for manually operating the lever to move the engaging surface away from the proximal end of the femoral tube device. (20) The trial neck according to embodiment 16, wherein the second end of the lever includes an inclined surface facing the hole, and when the proximal end of the femoral tube device is inserted into the hole, the proximal end of the femoral tube device rests on the inclined surface, thereby pivoting the lever and moving the engaging surface away from the proximal end of the femoral tube device.

[0128] (21) The trial neck according to embodiment 16, wherein the lever further comprises a biasing element for biasing the first end of the lever toward the hole, thereby biasing the engagement surface toward the hole. (22) A surgical kit, A trial neck according to any of Embodiments 1 to 21, A surgical kit including a femoral canal instrument. (23) The aforementioned femoral tube device, Femoral canal preparation equipment including reamers, broaches or trial stems, and A kit according to embodiment 22, selected from the group of implants. (24) The kit according to embodiment 22, wherein the proximal end of the femoral tube device includes a circumferential lip or groove for engaging with the engaging surface of the locking mechanism of the trial neck. (25) A method for attaching a trial neck to a femoral tube device, wherein the trial neck is The main body portion includes a hole for receiving the proximal end of the femoral tube device, A long, slender neck extending from the main body, A locking mechanism including a lever, wherein the lever is First end, The second end, and A locking mechanism having an engaging surface, The second end of the lever is operable to bias the engaging surface toward the proximal end of the femoral tube device, thereby fixing the proximal end of the femoral tube device within the hole. The aforementioned method, Inserting the proximal end of the aforementioned femoral tube device into the hole, A method comprising acting the second end of the lever to bias the engaging surface toward the proximal end of the femoral tube device.

[0129] (26) The method according to embodiment 25, comprising engaging the actuating member of the locking mechanism with the second end of the lever to actuate the lever. (27) The method according to embodiment 26, wherein the proximal end of the actuating member is provided with a connecting feature, and the method further comprises connecting a tool to the actuating member with the connecting feature in order to actuate the actuating member. (28) The method of embodiment 25, further comprising viewing the actuation member through the window in the elongated neck of the trial neck. (29) The method according to embodiment 25, wherein the first end of the lever is integral with the main body portion, and the engaging surface is located midway between the first end of the lever and the second end of the lever. (30) The method according to embodiment 25, wherein the first end of the lever is pivotably mounted within the trial neck.

Claims

1. A trial neck for hip surgery, The main body portion includes a hole for receiving the proximal end of the femoral tube device, A long, slender neck extending from the main body, A locking mechanism including a lever, wherein the lever is First end, The second end, and A locking mechanism having an engaging surface, It has further holes, The second end of the lever is operable to bias the engaging surface toward the proximal end of the femoral tube device, thereby fixing the proximal end of the femoral tube device within the hole. The first end of the lever is pivotably mounted within the trial neck. The locking mechanism further includes an actuating member for engaging with the second end of the lever to actuate the lever, The operating member extends into the further hole, A trial neck having an actuating member having a distal end for engaging with the second end of the lever to actuate the lever, the distal end having a recess for engaging with a corresponding projection on the second end of the lever to move the engaging surface away from the proximal end of the femoral tube device when the actuating member is withdrawn along the further hole.

2. The trial neck according to claim 1, wherein the further hole extends within the elongated neck.

3. The trial neck according to claim 2, wherein the further hole extends substantially parallel to the longitudinal axis of the elongated neck.

4. The trial neck according to claim 2, wherein the proximal end of the elongated neck has an opening leading to the further hole, and the proximal end of the actuating member has a connecting feature for connecting a tool to the actuating member in order to actuate the actuating member.

5. The trial neck according to claim 4, wherein the proximal end of the elongated neck is configured to be attached to a trial head.

6. The aforementioned further hole has a threaded surface, The trial neck according to claim 1, wherein the actuating member has a threaded surface for engaging with the threaded surface of the further hole, in order to rotate the actuating member and move the actuating member along the further hole to engage with the second end of the lever.

7. The trial neck according to claim 1, further comprising a window for viewing the operating member in the further hole.

8. The trial neck according to claim 1, wherein the first end of the lever is located on the side surface of the trial neck.

9. The trial neck according to claim 1, wherein the engaging surface of the lever is curved to fit the curved outer surface of the proximal end of the femoral tube device.

10. The trial neck according to claim 1, wherein the inner surface of the hole has a contoured surface for engaging with the corresponding contoured outer surface of the proximal end of the femoral tube instrument in order to prevent the femoral tube instrument from rotating relative to the trial neck about the longitudinal axis of the femoral tube instrument.

11. The trial neck according to claim 1, wherein the first end of the lever is integral with the main body portion, and the engaging surface is located midway between the first end of the lever and the second end of the lever.

12. The trial neck according to claim 11, wherein the second end of the lever is located within the elongated neck.

13. The trial neck according to claim 11, wherein the lever includes at least one dogleg bend.

14. A trial neck for hip joint surgery, The main body portion includes a hole for receiving the proximal end of the femoral tube device, A long, slender neck extending from the main body, A locking mechanism including a lever, wherein the lever is First end, The second end, and A locking mechanism having an engaging surface, The second end of the lever is operable to bias the engaging surface toward the proximal end of the femoral tube device, thereby fixing the proximal end of the femoral tube device within the hole. The first end of the lever is pivotably mounted within the trial neck. The second end of the lever includes a trial neck with an opening for receiving the operating member.

15. A trial neck for hip joint surgery, The main body portion includes a hole for receiving the proximal end of the femoral tube device, A long, slender neck extending from the main body, A locking mechanism including a lever, wherein the lever is First end, The second end, and A locking mechanism having an engaging surface, The second end of the lever is operable to bias the engaging surface toward the proximal end of the femoral tube device, thereby fixing the proximal end of the femoral tube device within the hole. The first end of the lever is pivotably mounted within the trial neck. A trial neck wherein the first end of the lever includes a grippable feature for manually operating the lever to move the engaging surface away from the proximal end of the femoral tube device.

16. A trial neck for hip joint surgery, The main body portion includes a hole for receiving the proximal end of the femoral tube device, A long, slender neck extending from the main body, A locking mechanism including a lever, wherein the lever is First end, The second end, and A locking mechanism having an engaging surface, The second end of the lever is operable to bias the engaging surface toward the proximal end of the femoral tube device, thereby fixing the proximal end of the femoral tube device within the hole. The first end of the lever is pivotably mounted within the trial neck. A trial neck wherein the second end of the lever includes an inclined surface facing the hole, and when the proximal end of the femoral tube device is inserted into the hole, the proximal end of the femoral tube device rests on the inclined surface, thereby pivoting the lever and moving the engaging surface away from the proximal end of the femoral tube device.

17. A trial neck for hip joint surgery, The main body portion includes a hole for receiving the proximal end of the femoral tube device, A long, slender neck extending from the main body, A locking mechanism including a lever, wherein the lever is First end, The second end, and A locking mechanism having an engaging surface, The second end of the lever is operable to bias the engaging surface toward the proximal end of the femoral tube device, thereby fixing the proximal end of the femoral tube device within the hole. The first end of the lever is pivotably mounted within the trial neck. A trial neck comprising a lever, the first end of the lever, for biasing toward the hole, thereby biasing the engagement surface toward the hole.

18. It is a surgical kit, A trial neck according to any one of claims 1 to 17, A surgical kit including a femoral canal instrument.

19. The aforementioned femoral tube device, Femoral canal preparation equipment including reamers, broaches or trial stems, and The kit according to claim 18, selected from the group of implants.

20. The kit according to claim 18, wherein the proximal end of the femoral tube device includes a circumferential lip or groove for engaging with the engaging surface of the locking mechanism of the trial neck.

Images