Straight and curved femoral broach impactor adapters

Abstract

The orthopaedic surgical instrument may include an elongate body (12) having a broach end (16) and an impactor end (14). The body may be straight or curved. A latch lever (44) may be pivotally coupled to the elongate body. The latch lever may be movable between an open position and a latched position in which the latch lever is retained within the body. A surgical broach may be rigidly attached to the broach end of the elongate body. An automated surgical impactor may be attached to the impactor end.

Description

Technical Field

[0001] The present disclosure generally relates to an orthopedic instrument for use in performing orthopedic joint replacement, and more specifically relates to an orthopedic instrument for use in hip replacement.

Background Art

[0002] Arthroplasty is a well-known surgical procedure in which diseased and / or damaged biological joints are replaced by artificial joints. For example, in hip arthroplasty procedures, the acetabulum of the patient's natural hip is partially or totally replaced with an artificial hip joint. A typical artificial hip joint includes an acetabular prosthesis component and a femoral head prosthesis component. The acetabular prosthesis component generally has an outer shell configured to engage with the patient's acetabulum, and an inner bearing or liner connected to the shell and configured to engage with the femoral head. The femoral head prosthesis component and the inner liner of the acetabular component form an acetabular joint similar to a natural hip joint.

[0003] A typical arthroplasty surgical procedure includes inserting a surgical instrument (e.g., a broach, a chisel, or other cutting tool) and / or a prosthesis implant into the patient's bone. Historically, insertion has been performed by an orthopedic surgeon manually impacting the surgical instrument using a surgical mallet or hammer. Such manual insertion can be unpredictable and inaccurate. In addition, typical manual insertion instruments may require the surgeon to hold the instrument with one hand and impact the instrument with a mallet held in the surgeon's other hand.

[0004] A particular automated surgical impactor can deliver a series of vibrational shocks, each providing a controlled amount of impact energy. The automated surgical impactor may be used with one or more adapters for connecting to various surgical instruments and / or implants. A typical adapter connects to the surgical instrument and / or implant using a rigid drivetrain that includes one or more drive shafts, gear trains, or other rigid mechanical connecting members. [Overview of the project] [Means for solving the problem]

[0005] According to one embodiment, the orthopedic instrument includes an elongated body, a first lever and a second lever, a leaf spring, and a push-button catch connected to the elongated body. The elongated body extends from a first end to a second end. The first end is configured to be received by an automatic surgical impactor. The first lever extends from a pivot end to a latch end. The pivot end is pivotably connected to the elongated body. The second lever is pivotally connected to the elongated body and includes a hook extending toward the upper surface of the elongated body. The leaf spring has a first end pivotally connected to the first lever and a second end pivotally connected to the second lever, such that the movement of the first lever causes the movement of the second lever. The first lever is movable between a first position in which the latch end is separated from the elongated body and a second position in which the latch end is captured by the push-button catch. When the first lever is in the second position, the leaf spring biases the second lever, causing the hook to pivot upward. In one embodiment, the elongated body includes a curved segment between the pivot end of the first lever and the second end of the elongated body.

[0006] In one embodiment, the elongated body includes a top surface having an elongated opening defined therein, a bottom surface opposite the top surface having an elongated opening defined therein, one or more inner walls extending between the elongated opening defined in the top surface and the elongated opening defined in the bottom surface, and a first cavity defined by the one or more inner walls. A second lever is located within the first cavity, and the pivot end of the first lever is pivotably connected to the elongated body within the first cavity. The latch end of the elongated lever extends out of the first cavity through the elongated opening defined in the top surface. A leaf spring is located within the first cavity.

[0007] In one embodiment, the elongated body includes a flat front surface located at a second end of the elongated body, with a circular opening defined in the flat front surface. The circular opening opens into a first cavity. In one embodiment, the circular opening defines a passage to an internal cavity sized to receive a mounting post for a surgical broach. When the first lever is in the second position, the hook of the second lever is positioned within the passage. In one embodiment, a guide post extends outward from the flat front surface of the elongated body. The guide post is positioned between the circular opening and the bottom surface.

[0008] In one embodiment, the orthopedic instrument is connected to an elongated body and further includes a stop pin positioned within a first cavity. When the first lever is in the first position, the bottom surface of the pivot end of the first lever contacts the stop pin.

[0009] In one embodiment, the elongated body includes a first side wall, a second side wall opposite the first side wall, an opening defined in the first side wall, one or more inner walls extending inward from the opening in the first side wall and defining a second cavity, and a second opening defined in the upper surface between the first end and the elongated opening and opening into the second cavity. A push-button catch is located within the second cavity. When the first lever is in the second position, the latch extending downward from the latch end is located within the second cavity and held by the push-button catch. In one embodiment, the push-button catch is movable between a first position in which the push-button catch engages with the latch located within the second cavity and a second position in which the push-button catch does not engage with the latch. In one embodiment, the orthopedic instrument further includes a second spring located within the second cavity. The second spring is configured to bias the push-button catch to the first position.

[0010] In one embodiment, the push-button catch includes a button surface positioned toward a first side wall of an elongated body, a pair of side walls extending from the button surface into a second cavity, a rear wall connecting the pair of side walls, and a catch extending from the rear wall into the second cavity. In one embodiment, the latch of the elongated lever includes a first cam surface, and the catch of the push-button catch includes a second cam surface. When the first lever is moved from a first position to a second position, the first cam surface engages with the second cam surface, and when the first cam surface engages with the second cam surface, the push-button catch is biased from the first position to the second position.

[0011] In another embodiment, a method for performing an orthopedic surgery includes inserting the mounting post of a surgical broach into a circular opening defined in a flat surface located at the first end of an orthopedic instrument; moving the first lever of the orthopedic instrument from a first position to a second position in response to the insertion of the mounting post into the circular opening, the method including latching the first lever to the second position, applying compression to the second lever of the orthopedic instrument using a compliant member of the orthopedic instrument, and clamping the hook of the second lever to the mounting post of the surgical broach; and connecting the second end of the orthopedic instrument to an automated surgical impactor in response to the movement of the lever.

[0012] In one embodiment, clamping the hook of the second lever to the mounting post includes engaging a notch defined in the mounting post with a first side of the curved outer surface of the hook. In one embodiment, inserting the mounting post includes engaging a second side of the curved outer surface of the hook with a chamfer defined in the tip of the mounting post, and engaging the second side includes pivoting the hook away from the centerline of the circular opening.

[0013] In one embodiment, the method further includes: inserting a surgical broach into a surgically prepared bone of a patient using an automated surgical impactor in response to the second end being connected to the automated surgical impactor; pressing down a push-button catch of an orthopedic instrument in response to the insertion of the broach, wherein pressing down the push-button catch of an orthopedic instrument includes releasing a second lever from a second position and releasing compression by a compliant member; and releasing the surgical broach from the first end of the orthopedic instrument in response to pressing down the push-button catch.

[0014] In one embodiment, the method further includes withdrawing the surgical broach from the surgically prepared bone using an automated surgical impactor in response to the insertion of the surgical broach, and further includes pressing down a push-button catch in response to the withdrawal of the surgical broach. In one embodiment, the method further includes inserting the mounting post of a second surgical broach into a circular opening defined in a flat surface located at the first end of an orthopedic instrument in response to the release of the surgical broach.

[0015] In another embodiment, a surgical instrument assembly includes an orthopedic instrument and a surgical broach. The orthopedic instrument includes an elongated body, a first lever and a second lever, a leaf spring, and a push-button catch connected to the elongated body. The elongated body extends from a first end to a second end. The first end is configured to be received by an automatic surgical impactor. The first lever extends from a pivot end to a latch end. The pivot end is pivotably connected to the elongated body, and the second lever is also pivotally connected to the elongated body. The second lever includes a hook extending toward the upper surface of the elongated body. The leaf spring has a first end pivotably connected to the first lever and a second end pivotably connected to the second lever, such that the movement of the first lever causes the movement of the second lever. The surgical broach includes a mounting post extending from a first end of the surgical broach, and the surgical broach is connected to a second end of an orthopedic instrument. The first lever of the orthopedic instrument is movable between a first position in which the latch end is separated from the elongated body and a second position in which the latch end is captured by a push-button catch. When the first lever is in the second position, a leaf spring biases the second lever, causing the hook to pivot and engage with the mounting post of the surgical broach.

[0016] In one embodiment, the elongated body includes a top surface having an elongated opening defined therein, a bottom surface opposite the top surface having an elongated opening defined therein, one or more inner walls extending between the elongated opening defined in the top surface and the elongated opening defined in the bottom surface, and a first cavity defined by the one or more inner walls. A second lever is located within the first cavity. The pivot end of the first lever is pivotably connected to the elongated body within the first cavity. The latch end of the elongated lever extends out of the first cavity through the elongated opening defined in the top surface. A leaf spring is located within the first cavity. [Brief explanation of the drawing]

[0017] For a detailed explanation, please refer specifically to the following diagrams. [Figure 1] This is a perspective view of a linear broach impactor adapter in an open configuration. [Figure 2] Figure 1 is a cross-sectional elevation view of a linear broach impactor adapter. [Figure 3] This is a perspective view of the linear broach impactor adapter shown in Figure 1, which has a latch configuration. [Figure 4] Figure 3 is a cross-sectional elevation view of a linear broach impactor adapter. [Figure 5] Figure 3 is a cross-sectional elevation view of the rear surface of the linear broach impactor adapter. [Figure 6] Figures 1 to 5 are elevation views of the linear broach impactor adapter, which is connected to a femoral broach and has an open configuration. [Figure 7] Figure 6 is a partial cross-sectional elevation view of the linear broach impactor adapter and the femoral broach. [Figure 8] Figures 1 to 5 show elevation views of the linear broach impactor adapter, which is attached to a femoral broach and has a latch configuration. [Figure 9] Figure 8 shows a partial cross-sectional elevation view of a linear broach impactor and a femoral broach. [Figure 10]It is a perspective view of the straight broach impactor adapter and femoral broach shown in Figures 8 to 9 during an orthopedic surgery performed using an automatic surgical impactor. [Figure 11] It is a perspective view of a curved broach impactor adapter in an open configuration. [Figure 12] It is a sectional elevation view of the curved broach impactor adapter shown in Figure 11. [Figure 13] It is a perspective view of the curved broach impactor adapter shown in Figure 11 in a latched configuration. [Figure 14] It is a sectional elevation view of the curved broach impactor adapter shown in Figure 13. [Figure 15] It is a sectional elevation view of the rear surface of the curved broach impactor adapter shown in Figure 13. [Figure 16] It is an elevation view of the curved broach impactor adapter shown in Figures 11 to 15, which is connected to a femoral broach and in an open configuration. [Figure 17] It is a partial sectional elevation view of the curved broach impactor adapter and femoral broach shown in Figure 16. [Figure 18] It is an elevation view of the curved broach impactor adapter shown in Figures 11 to 15, which is attached to a femoral broach and in a latched configuration. [Figure 19] It is a partial sectional elevation view of the curved broach impactor and femoral broach shown in Figure 18. [Figure 20] It is a perspective view of the curved broach impactor adapter and femoral broach shown in Figures 18 to 19 during an orthopedic surgery performed using an automatic surgical impactor. DETAILED DESCRIPTION OF EMBODIMENTS FOR CARRYING OUT THE INVENTION

[0018] While the concepts of this disclosure are open to various modifications and alternative forms, specific exemplary embodiments are shown in the drawings as examples and described in detail herein. However, it should be understood that the concepts of this disclosure are not intended to be limited to any particular form disclosed, but rather, the present invention is intended to encompass all modifications, equivalents, and alternatives that are included in the spirit and scope of the invention as defined by the appended "Claims".

[0019] Terms such as anterior, posterior, medial, lateral, superior, and inferior, which represent anatomical reference points, may be used throughout this specification in relation to the orthopedic implants and orthopedic instruments described herein, as well as in relation to the vivisection of the patient's anatomical structure. Such terms have well-understood meanings in both the study of anatomy and the field of orthopedic surgery. The use of such anatomical reference terms in the descriptions and claims is intended to be consistent with their well-understood meanings unless otherwise specified. In addition, terms such as "apex," "base," "anterior," "posterior," "lateral," "height," "length," "width," "upper," and "lower," which may be used herein, are merely descriptive of reference points and should not necessarily limit embodiments of this disclosure to any particular orientation or configuration.

[0020] Referring here to Figures 1 to 5, a straight femoral broach impactor adapter 10 (hereinafter, impactor adapter 10) is illustrated. The impactor adapter 10 is an orthopedic instrument, meaning it is a surgical tool used by a surgeon when performing orthopedic surgery. Therefore, as used herein, the term “orthopedic instrument (singular and plural)” should be understood to be distinct from orthopedic implants or prostheses that are surgically implanted in a patient’s body. As will be further described below, the impactor adapter 10 may be used with an automated surgical impactor to drive a femoral broach into a surgically prepared femur of a patient.

[0021] As shown in Figures 1 to 4, the impactor adapter 10 includes an elongated body 12 extending from an angled impactor mounting end 14 to a broach end 16. In the illustrated embodiments, the body 12 is formed of a metallic material such as stainless steel or cobalt-chromium. The body 12 is generally straight and defines the longitudinal tool axis 18. As will be further described below, the impactor end 14, also called the rear end or proximal end, can be attached to an automated surgical impactor tool when in use. Similarly, the broach end 16, also called the front end, anterior end, or distal end, can be attached to a surgical broach, chisel, or other surgical cutting tool when in use.

[0022] The elongated body 12 has a substantially rectangular cross-section and therefore has a top surface 20, a bottom surface 22 opposite the top surface 20, and a pair of sides 24, 26. A pair of elongated openings 28, 30 are defined within the top surface 20 and the bottom surface 22, respectively. One or more inner walls 32 extend through the body 12 between the openings 28, 30 and define a cavity 34 inside the body 12.

[0023] The broach end 16 includes a flat surface 36 with a circular opening 38 defined within it. A passage 40 extends inward from the circular opening 38 into the cavity 34. A guide pin 42, positioned on the flat surface 36 between the circular opening 38 and the bottom surface 32, extends outward from the flat surface 36. As will be further described below, when the impactor adapter 10 is connected to the femoral surgical broach, the opening 38 receives the mounting post of the broach.

[0024] The impactor adapter 10 further includes an elongated latch lever 44 extending outward from the cavity 34 through an opening 28 defined in the upper surface 20. The latch lever 44 includes a pivot end 46 pivotably mounted to the body 12 within the cavity 34. Exemplarily, a bore 48 is defined through the pivot end 46, and a pair of circular openings 50 are defined through the sides 24, 26 of the body 12. The bore 48 encompasses the pivot point of the latch lever 44. A pin 52 is positioned within the bore 48 and the opening 50 so that the latch lever 44 is joined to the body 12 and can rotate around the pin 52. In the illustrated embodiment, the pin 52 is press-fitted into the opening 50. However, any suitable method for securing the pin 52 may be used.

[0025] Another pair of circular openings 54 are defined through the sides 24, 26 of the main body 12. A stop pin (56) is positioned within the opening (54). In the illustrated embodiment, the stop pin 56 is press-fitted into the opening 54. However, any suitable method for securing the stop pin 56 may be used. As shown in Figure 2, when the lever 44 reaches the open position, the lower surface 58 of the pivot end 46 engages with the stop pin 56. Thus, the stop pin 56 functions as a stopper that limits the range of motion of the lever 44.

[0026] The body 60 of the latch lever 44 extends outward from the pivot end 46 through an opening 28 defined in the upper surface 20. The wing 62 extends laterally from the body 60. The body 60 extends further toward the latch end 64. The latch end 64 includes a latch 66 extending downward from the lever body 60. As shown in the cross-sectional view of Figure 5, the latch 66 includes a lower cam surface 68 and an upper surface 70 that extend inward toward the interior of the body 12. As will be further described below, when the lever 44 is in the latched position as shown in Figures 3 to 5, the latch 66 of the latch lever 44 can be captured within the body 12 by the catch mechanism.

[0027] In the latched position, the body 60 of the lever 44 can contact the upper surface 20 of the body 12, acting as a stopper to limit the range of movement of the lever 44. In the latched position, the wings 62 of the lever 44 extend outward beyond the side surface 24, allowing a surgeon or other user to grasp the lever 44. As described above, the latched lever 44 is movable between the open position shown in Figures 1-2 and the latched position shown in Figures 3-5. The projection angle of the lever 44, i.e., the angle between the body 60 of the lever 44 and the body 12 when the lever 44 is in the fully open position, can be limited to less than approximately 40-45 degrees.

[0028] The impactor adapter 10 further includes a clamp lever 72 positioned within a cavity 34. The clamp lever 72 includes a body 74 having a generally triangular, nonlinear shape. The clamp lever 72 is pivotally mounted to the body 12 within the cavity 34. Exemplarily, a bore 76 is defined through the lever body 74, and a pair of circular openings 78 are defined through the sides 24, 26 of the body 12. The bore 76 encompasses the pivot point of the clamp lever 72. A pin 80 is positioned within the bore 76 and the openings 78, allowing the clamp lever 72 to be joined to the body 12 and rotate around the pin 80. In the illustrated embodiment, the pin 80 is press-fitted into the openings 78. However, any suitable method for securing the pin 80 may be used.

[0029] The clamp lever 72 extends to a bullnose hook 82 having a convex, rounded outer surface 84. As the clamp lever 72 rotates around the pin 80, the hook 82 pivots within the cavity 34 toward and away from the upper surface 20. As will be further described below, the hook 82 of the clamp lever 72 is operable to securely attach the surgical broach to the impactor adapter 10.

[0030] The impactor adapter 10 further includes a leaf spring 86 or other compliant connecting member that connects the latch lever 44 and the clamp lever 72. The leaf spring 86 has a flexible body 88 extending between ends 90, 92. End 90 is pivotably connected to the pivot end 46 of the latch lever 44, and end 92 is pivotally connected to the body 74 of the clamp lever 72. Exemplarily, each end 90, 92 includes a fork 94 extending to a pair of mounting plates 96. A circular opening 98 is defined passing through each mounting plate 96. The mounting plate 96 of end 90 surrounds a bore 100 defined passing through the pivot end 46 of the lever 44. A pin 102 is positioned within the opening 98 and the bore 100 to pivotally connect end 90 to the body 44. Similarly, the mounting plate 96 of the end 92 surrounds the bore 104 defined through the clamp lever 72, and the pin 106 is positioned within the opening 98 and the bore 104 to pivotally connect the end 92 to the clamp lever 72.

[0031] When the lever 44 is in the open position (as shown in Figures 1-2), the leaf spring 86 has a relaxed, arched shape. When the lever 44 is moved to the latched position (as shown in Figures 3-5), the leaf spring 86 has a shorter, compressed shape and is in a compressed state. In the compressed state, the leaf spring 86 biases the clamp lever 72, causing it to pivot around the pin 80 and rotate the hook 82 toward the upper surface 20 of the body 12. The compression of the leaf spring 86 can be released by moving the lever 44 from the latched position to the open position, as will be further described below. As mentioned above, the wing 62 extending from the lever body 60 can assist a surgeon or other user in moving the lever 44 from the latched position to the open position.

[0032] As shown in Figures 1 and 3, each of the sides 24 and 26 has a waist portion 108 positioned between the cavity 34 and the impactor end 14. At the waist portion 108, the distance between the sides 24 and 26 increases toward the impactor end 14. As shown in Figure 3, in the closed position, the wing 62 is positioned between the waist portion 108 and the broach end 14, extending beyond the side 24, allowing the surgeon to grasp the wing 62.

[0033] As shown in Figures 1 to 5, the opening 110 is defined on the side surface 24 of the body 12 between the waist 108 and the impactor end 14 of the body 12. One or more inner walls 112 extend inward from the opening 110, defining the cavity 114. An additional opening 116 is defined in the upper surface 20. The opening 118 extends through the opening 116 into the cavity 114.

[0034] The push-button catch 120 (also called the button 120) is located within the cavity 114. As will be further described below, the push-button catch 120 may be used to selectively hold the latch lever 44 in the latch position shown in Figures 3 to 5. The push-button catch 120 includes a button surface 122 positioned toward the side 24 of the body 12. The button surface 122 is configured to be pressed by a surgeon and therefore may be textured or otherwise configured to provide additional grip. In addition, as shown in Figure 5, in normal operation, the button surface 122 may be coplanar with the side 24 and / or fitted within the cavity 114 to prevent accidental movement.

[0035] The push-button catch 120 further includes a pair of side walls 124 extending inward from the button surface 122 into the cavity 114. The side walls are connected by a rear wall 126. The button surface 122, side walls 124, and rear wall 126 all surround the button cavity 128. The catch 130 extends upward from the rear wall 126. The catch 130 includes an upper cam surface 132 and a lower surface 134 extending inward into the button cavity 128. A guide pin 136 extends from the back surface 138 of the catch 130 toward the other side surface 26. A helical spring 140 is held between the body 12 and the back surface 138 of the catch 130, and the guide pin 136 is trapped within the spring 140. The spring 140 is biased against the body 12 and the back surface 138, biasing the push-button catch 120 toward the opening 110 in the side surface 24. The stop pin 142, positioned in a hole defined through the bottom surface 22 of the body 12, extends into the latch cavity 114. When the push-button catch 120 is positioned in the cavity 114, the stop pin 142 also extends into the button cavity 128. The stop pin 142 engages with the rear wall 126 of the push-button catch 120 and thus holds the push-button catch 120 in the cavity 114 of the body 12.

[0036] As shown in Figure 5, when the lever 44 is in the latched position, the latch 66 extends into the cavity 114 and the button cavity 128. The upper surface 70 of the latch 66 engages with the lower surface 134 of the catch 130, thereby holding the latch 66 within the button cavity 128. When the surgeon or another user presses down the button surface 162, the push-button catch 120 slides toward the side 26, and the lower surface 134 of the catch 130 slides away from the upper surface 70, releasing the latch 66. When the latch 66 is released, the leaf spring 86 releases its compression by swinging the latch end 64 of the lever 44 out of the cavity 114 toward the open position.

[0037] When a surgeon or another user moves the lever 44 from the open position to the latched position without pressing down the push-button catch 120, the lower cam surface 68 of the latch 66 engages with the upper cam surface 132 of the catch 130. This engagement of the cam surfaces 68 and 132 causes the push-button catch 120 to slide toward the side 26, allowing the latch 66 to enter the button cavity 128. Once the latch 66 has passed through the catch 120 and the cam surfaces 68 and 132 are disengaged, the spring 140 causes the push-button catch 120 to slide toward the side 24, so that the lower surface 134 of the catch 130 holds the upper surface 70 of the latch 66. Thus, the latch lever 44 can be operated with one hand.

[0038] As shown in Figures 1 to 4, the impactor end 14 includes a shank 144 configured to be received by an automated surgical impactor. As shown in Figures 1 and 3, the shank 144 extends away from the tool axis 18 at a non-zero angle. This non-zero angle may improve ergonomics for the surgeon when used with an automated surgical impactor. The illustrated shank 144 includes a pin 146 and a flange 148. The shank 144 is configured to be impacted by the automated surgical impactor in either the forward direction (i.e., the direction that advances the impactor adapter 10 toward the patient's bone) or the reverse direction (i.e., the direction that retracts the impactor adapter 10 toward the patient's bone). It should be understood that in other embodiments, the shank 144 may include any other configurations of the pin, flange, flat portion, and / or other shaped portion configured to be captured and / or embedded by the automated surgical impactor. The illustrated shank 144 further includes a groove 150, which indicates the depth when the shank 144 is fully seated within the automated surgical impactor.

[0039] The impactor adapter 10 can be used during the performance of orthopedic surgery similar to that shown in Figures 6 to 10. First, the surgeon surgically prepares the patient's bone to receive the surgical broach. To do so, the surgeon or another member of the surgical team may excise the patient's femur to remove the natural femoral head and create a substantially flat proximal surface on the patient's femur. The surgeon may use a bone knife to create an opening into the femoral canal.

[0040] After preparing the patient's bone, the surgeon attaches the femoral broach 152 to the impactor adapter 10, as shown in Figures 6-7. The surgeon may select the broach 152 from a set of broach 152, each having a different size. As will be further described below, the surgeon can sequentially cut out the patient's femur using a series of broach 152 in increasing size.

[0041] The illustrated femoral broach 152 includes an elongated body 154 extending from a proximal end 156 to a distal end 158. In the illustrated embodiment, the femoral broach 152 is formed as a single, one-piece component made of a metallic material, such as stainless steel. A tapered outer surface 160 extends from the proximal end 156 to the distal end 158 and, in some embodiments, is covered with a plurality of cutting teeth 162. Each tooth 162 may be shaped and sized to surgically prepare the femoral canal of the patient's femur to receive a femoral component and / or another surgical instrument (e.g., another femoral broach and / or femoral trial component).

[0042] The femoral broach 152 includes a flat proximal surface 164 at the proximal end 156 of an elongated body 154. As shown in Figure 7, a slot 166 is defined in the proximal surface 164, and this slot 166 is sized to receive a guide pin 42 extending from the broach end 16 of the impactor adapter 10. The broach 152 further includes a proximal mounting post 168 extending outward from the surface 164 to the tip 170. The post 168 further defines a chamfered portion 172 located at the tip 170. The inner wall 174 defines a notch 176, which may be used to secure the femoral broach 152 to the impactor adapter 10, as will be further described below.

[0043] As shown in Figure 6, the lever 44 of the impactor adapter 10 is initially in the open position. The surgeon or other user attaches the proximal end 156 of the femoral broach 152 to the broach end 16 of the impactor adapter 10. As shown in Figure 7, once the broach 152 and the impactor adapter 10 are attached, the mounting post 168 of the broach 152 passes through the opening 38 of the impactor adapter 10 into the passage 40, and the guide pin 42 of the impactor adapter 10 passes through the slot 166 of the broach 152. Once the mounting post 168 enters the passage 40, depending on the position of the clamp lever 72, the mounting post 168 may come into contact with the bullnose hook 82 of the clamp lever 72. In this case, the chamfered portion 172 on the tip 170 of the mounting post 168 engages with the convex outer surface 84 of the hook 82. When the chamfered portion 172 and the outer surface 84 engage, the hook 82 is biased to rotate downward away from the passage 40, allowing the mounting post 168 to continue into the passage. When the broach 152 is fully inserted into the impactor adapter 10, the proximal surface 164 of the broach 152 contacts the flat surface 36 of the impactor adapter. When fully inserted, the notch 176 defined within the mounting post 168 faces the bullnose hook 82 of the clamp lever 72.

[0044] After securing the femoral broach 152 to the impactor adapter 10, the surgeon moves the latch lever 44 from the open position to the latched position, as shown in Figures 8 and 9. When the latch lever 44 moves to the latched position, the leaf spring 86 is compressed. When the leaf spring 86 is compressed, it applies force to the clamp lever 72, causing the hook 82 of the clamp lever 72 to pivot toward the mounting post 168. The clamp lever 72 pivots until the outer surface 84 of the hook 82 engages with the inner wall 174 in the notch 176. When engaged, the leaf spring 86 and the clamp lever 72 apply a clamping force to the mounting post 168, holding the femoral broach 152 in contact with the surface 36 of the impactor adapter 10. Thus, the femoral broach 152 is held firmly and immovably relative to the implant adapter 10. As described above, when the latch lever 44 is in the latched position, the push-button catch 120 holds the latch 66, ensuring that the latch lever 44 remains in the latched position and the femoral broach 152 remains firmly attached to the impactor adapter 10. Furthermore, because the latch lever 44 is held by the push-button catch 120, the leaf spring 86 does not extend to the over-center position and holds the latch lever 44. Thus, the impactor adapter 10 can reduce wear and extend its lifespan compared to an insertion tool that uses an over-center clamping function.

[0045] After latching the impactor adapter 10, the surgeon attaches the impactor end 14 of the impactor adapter 10 to the automated surgical impactor 178, as shown in Figure 10. Additionally or alternatively, in some embodiments, the impactor adapter 10 may be attached to the automated surgical impactor 178 before being attached to the femoral broach 152.

[0046] For example, the automated surgical impactor 178 may be embodied as a component of the Kincise® automated surgical system, which is commercially available from DePuy Synthes (Warsaw, Indiana). In the illustrated embodiment, the automated surgical impactor 178 includes an impactor body 180 having a twist-lock collar 182 and a battery pack 184. An electric drive component 186 is housed within the impactor body 180. The impactor body 180 further includes a main handgrip 188, an auxiliary handgrip 190, and a trigger 192.

[0047] During use, the surgeon inserts the shank 144 of the impactor adapter 10 into the twist-lock collar 182 and then locks the collar 182 into the shank 144. Holding the primary handgrip 188 and / or auxiliary handgrip 190, the surgeon inserts the femoral broach 152 into the patient's surgically prepared femur 194, as shown in Figure 10. After positioning the femoral broach 152, the surgeon presses down the trigger 192. This causes the electrically driven component 186 to generate a series of controlled impacts against the impactor adapter 10 using electrical energy provided by the battery pack 184. The impactor adapter 10 transmits the implantation force from the vibrational impact to the femoral broach 152, thereby driving the femoral broach 152 into the medullary canal of the patient's femur 194. During implantation, the surgeon's hand may remain on the automated surgical impactor 178 and the latch lever 44 remains in the latched position. In addition, the leaf spring 86 firmly holds the femoral broach 152 to the impactor adapter 10 during implantation. Unlike adapters that use a typical rigid drive row mounting mechanism, the compliant flexible leaf spring 86 of the impactor adapter 10 does not retract during implantation, nor does it loosen, even when subjected to frequent low-amplitude impacts generated by the automated surgical impactor 178.

[0048] After the femoral broach 152 has been cut to the desired depth, or otherwise fully embedded within the patient's femur 194, the surgeon may remove the femoral broach 152 from the femur 194. For example, the surgeon may remove the femoral broach 152 and continue cutting the femur 194 with a successively larger broach 152. Additionally or alternatively, the surgeon may remove the femoral broach 152 and insert a prosthesis component, trial component, or other femoral component into the femur 194. To remove the femoral broach 152, the surgeon operates the trigger 192 in reverse mode. This generates a series of controlled vibrational impacts in the reverse direction against the impactor adapter 10, thereby retracting and removing the broach 152 from the femur 194.

[0049] After the surgeon removes the femoral broach 152 from the femur 194, the surgeon removes the impactor adapter 10 from the femoral broach 152. To do this, the surgeon presses down the button surface 122 of the push-button catch 120, causing the push-button catch 120 to slide into the cavity 114 within the body 12. Once the push-button catch 120 slides into the cavity 114, its lower surface 134 disengages from the upper surface 70 of the latch 66, releasing the latch end 64 of the latch lever 44. Once the latch 66 is released, the leaf spring 86 can bias the latch lever 44, allowing it to swing toward the open position. The surgeon may, if necessary, manually open the latch lever 44, for example, by using the wing 62 as a gripping surface. As described above, in the fully open position, the latch lever 44 is limited to an angle of approximately 40 degrees. This limited opening angle can reduce the risk of snagging on, tearing, or otherwise interfering with the patient's tissue. After moving the latch lever 44 to the open position, the clamp lever 72 may be released from the mounting post 168, and the broach 152 may be removed from the impactor adapter 10. After removing the broach 152, another femoral broach 152, for example, a larger one, may be attached to the impactor adapter 10 as described above.

[0050] Although the femoral broach 152 is described as being removed from the femur 194 before being removed from the impactor adapter 10, it should be understood that in some embodiments, the impactor adapter 10 may be removed from the broach 152 while the broach 152 remains positioned within the femur 194. For example, in certain embodiments, the last and largest broach 152 used by the surgeon may remain within the femur 194 to be used as a femoral trial component.

[0051] As described above, the elongated body 12 of the impactor adapter 10 has a generally linear shape that defines the longitudinal tool axis 18. This linear shape of the impactor adapter 10 may be selected by surgeons using the direct anterior approach (DAA) surgical technique to perform total hip replacement. Impactor adapters with other shapes may be used for other surgical approaches.

[0052] Referring here to Figures 11-15, an exemplary embodiment of the curved broach impactor adapter 200 may be used in posterior and / or anterolateral surgical techniques for performing total hip arthroplasty. The exemplary curved impactor adapter 200 shares components similar to those of the straight broach adapter 10. These similar components are shown in Figures 11-15 with the same reference numerals as shown in Figures 1-5, and a description of these components is not repeated here so as not to obscure the present disclosure.

[0053] Unlike the impactor adapter 10 shown in Figures 1 to 5, the curved adapter 200 shown in Figures 11 to 15 includes an elongated body 12 having a straight segment 202 and a curved segment 204. The straight segment 202 extends along the tool axis 18. The curved segment 204 defines the broach axis 206 extending outward from the broach end 16. A non-zero angle is defined between the tool axis 18 and the broach axis 206. A further difference from the impactor adapter 10 is that the shank 144 of the curved adapter 202 may extend along the tool axis 18.

[0054] The curved adapter 200 can be used during orthopedic surgery, as shown in Figures 16 to 20. The procedure shown in Figures 16 to 20 is similar to the procedure shown in Figures 6 to 10 and described above. As described above, first the surgeon prepares the patient's bone to receive the surgical broach. As shown in Figures 16 to 17, the surgeon or another user attaches the femoral broach 152 to the broach end 16 of the curved adapter 200. As shown in Figures 18 to 19, once the femoral broach 152 is attached, the surgeon or another user moves the latch lever 44 from the open position to the latched position, in which case the femoral broach 152 is firmly held in contact with the surface 36 of the curved adapter 200. As shown in Figure 20, the surgeon attaches the impactor end 14 of the curved adapter 200 to the automated surgical impactor 178, and then uses the automated surgical impactor 178 to insert the broach 152 into the patient's femur 194. As described above, the surgeon may insert the broach 152 using a posterior or anterolateral approach. After the cutting is complete, the surgeon may remove the broach 152 from the curved adapter 200 and continue broach trimming, for example, by using a successively larger broach 152, or by implanting a femoral component or other prosthesis component.

[0055] While the drawings and the above description have illustrated and illustrated the present disclosure in detail, such illustrations and descriptions are, by their nature, illustrative and not limiting, and merely illustrate exemplary embodiments. It is understood that all changes and modifications included in the spirit of the present disclosure should be protected.

[0056] This disclosure offers several advantages based on the various features of the methods, apparatus, and systems described herein. It should be noted that alternative embodiments of the methods, apparatus, and systems of this disclosure do not include all of the features described, but still benefit from at least some of the advantages of these features. Those skilled in the art can easily independently implement methods, apparatus, and systems that incorporate one or more of the features of the present invention, encompassing the spirit and scope of this disclosure as defined in the appended "Claims."

[0057] [Implementation Method] (1) Orthopedic instruments for use with surgical broaches, An elongated body extending from a first end to a second end, wherein the first end is configured to be received by an automated surgical impactor, A first lever extending from a pivot end to a latch end, wherein the pivot end is pivotably connected to the elongated body, A second lever pivotably connected to the elongated body, the second lever having a hook extending toward the upper surface of the elongated body, A leaf spring having a first end pivotably connected to the first lever and a second end pivotably connected to the second lever, such that the movement of the first lever causes the movement of the second lever. A push button catch connected to the aforementioned elongated body, Equipped with, An orthopedic instrument wherein the first lever is movable between a first position in which the latch end is separated from the elongated body and a second position in which the latch end is captured by the push-button catch, and when the first lever is in the second position, the leaf spring biases the second lever to pivot the hook toward the upper surface. (2) The orthopedic instrument according to Embodiment 1, wherein the elongated body has a curved segment between the pivot end of the first lever and the second end of the elongated body. (3) The elongated body comprises (i) an upper surface having an elongated opening defined therein, (ii) a bottom surface opposite to the upper surface having an elongated opening defined therein, (iii) one or more inner walls extending between the elongated opening defined in the upper surface and the elongated opening defined in the bottom surface, and (iv) a first cavity defined by the one or more inner walls. The second lever is positioned within the first cavity, The pivot end of the first lever is pivotably connected to the elongated body within the first cavity, and the latch end of the elongated lever extends out of the first cavity through the elongated opening defined in the upper surface. The leaf spring is positioned within the first cavity. An orthopedic instrument as described in Embodiment 1. (4) The elongated body has a flat front surface located on the second end of the elongated body, A circular opening is defined on the flat front surface, and the circular opening opens into the first cavity. An orthopedic instrument according to Embodiment 3. (5) The circular opening defines a passage into the internal cavity which is sized to receive the mounting post of the surgical broach, When the first lever is in the second position, the hook of the second lever is positioned within the passage. An orthopedic instrument according to Embodiment 4.

[0058] (6) The orthopedic instrument according to Embodiment 5, wherein the guide post extends outward from the flat front surface of the elongated body, and the guide post is positioned between the circular opening and the bottom surface. (7) The orthopedic instrument according to Embodiment 3, further comprising a stop pin connected to the elongated body and positioned within the first cavity, wherein when the first lever is in the first position, the bottom surface of the pivot end of the first lever contacts the stop pin. (8) The elongated body comprises (i) a first side wall and a second side wall opposite the first side wall, (ii) an opening defined in the first side wall, (iii) one or more inner walls extending inward from the opening in the first side wall and defining a second cavity, and (iv) a second opening defined in the upper surface between the first end and the elongated opening and opening into the second cavity, The push button catch is located within the second cavity, The orthopedic instrument according to Embodiment 3, wherein when the first lever is in the second position, the latch extending downward from the latch end is positioned within the second cavity and held by the push-button catch. (9) The orthopedic instrument according to Embodiment 8, wherein the push-button catch is movable between a first position in which the push-button catch engages with the latch located in the second cavity and a second position in which the push-button catch does not engage with the latch. (10) The orthopedic instrument according to Embodiment 9, further comprising a second spring positioned within the second cavity, wherein the second spring is configured to bias the push-button catch to the first position.

[0059] (11) The orthopedic instrument according to Embodiment 10, wherein the push button catch comprises a button surface positioned toward the first side wall of the elongated body, a pair of side walls extending from the button surface into the second cavity, a rear wall connecting the pair of side walls, and a catch extending from the rear wall into the second cavity. (12) The orthopedic instrument according to Embodiment 11, wherein the latch of the elongated lever has a first cam surface, the catch of the push-button catch has a second cam surface, the first cam surface engages with the second cam surface when the first lever is moved from a first position to a second position, and the push-button catch is biased from a first position to a second position when the first cam surface engages with the second cam surface. (13) Methods for performing orthopedic surgery, Inserting the mounting post of the surgical broach into a circular opening defined in a flat surface located at the first end of the orthopedic instrument, Moving the first lever of the orthopedic instrument from a first position to a second position in response to inserting the mounting post into the circular opening, comprising: latching the first lever to the second position; applying compression to the second lever of the orthopedic instrument using a compliant member of the orthopedic instrument; and clamping the hook of the second lever to the mounting post of the surgical broach, In response to the movement of the lever, the second end of the orthopedic instrument is connected to the automated surgical impactor, Methods that include... (14) The method according to embodiment 13, wherein clamping the hook of the second lever to the mounting post involves engaging a notch defined in the mounting post with a first side of the curved outer surface of the hook. (15) The method according to embodiment 14, wherein inserting the mounting post includes engaging a second side of the curved outer surface of the hook with a chamfer defined within the tip of the mounting post, and engaging the second side includes pivoting the hook away from the centerline of the circular opening.

[0060] (16) In response to connecting the second end to the automated surgical impactor, inserting the surgical broach into the surgically prepared bone of the patient using the automated surgical impactor, Pressing down the push-button catch of the orthopedic instrument in response to inserting the broach, wherein pressing down the push-button catch of the orthopedic instrument includes releasing the latch of the second lever from the second position and releasing the compression by the compliant member, In response to the push-button catch being pressed down, the surgical broach is released from the first end of the orthopedic instrument, The method according to embodiment 13, further comprising: (17) In response to the insertion of the surgical broach, further comprising withdrawing the surgical broach from the surgically prepared bone using the automated surgical impactor, The method according to embodiment 16, wherein pressing down the push button catch is performed in response to the surgical broach being withdrawn. (18) The method according to embodiment 17, further comprising inserting a mounting post of a second surgical broach into the circular opening defined in the flat surface located at the first end of the orthopedic instrument in response to the release of the surgical broach. (19) A surgical instrument assembly, Orthopedic instruments, An elongated body extending from a first end to a second end, wherein the first end is configured to be received by an automated surgical impactor, A first lever extending from a pivot end to a latch end, wherein the pivot end is pivotably connected to the elongated body, A second lever pivotably connected to the elongated body, the second lever having a hook extending toward the upper surface of the elongated body, A leaf spring having a first end pivotably connected to the first lever and a second end pivotably connected to the second lever, such that the movement of the first lever causes the movement of the second lever, and A push button catch connected to the aforementioned elongated body, Orthopedic instruments equipped with, A surgical broach connected to the second end of the orthopedic instrument, comprising a mounting post extending from the first end of the surgical broach, Equipped with, A surgical instrument assembly wherein the first lever of the orthopedic instrument is movable between a first position in which the latch end is separated from the elongated body and a second position in which the latch end is captured by the push-button catch, and when the first lever is in the second position, the leaf spring biases the second lever to pivot the hook and engage it with the mounting post of the surgical broach. (20) The elongated body comprises (i) an upper surface having an elongated opening defined therein, (ii) a bottom surface opposite to the upper surface having an elongated opening defined therein, (iii) one or more inner walls extending between the elongated opening defined in the upper surface and the elongated opening defined in the bottom surface, and (iv) a first cavity defined by the one or more inner walls. The second lever is positioned within the first cavity, The pivot end of the first lever is pivotably connected to the elongated body within the first cavity, and the latch end of the elongated lever extends out of the first cavity through the elongated opening defined in the upper surface. The leaf spring is positioned within the first cavity. A surgical instrument assembly according to Embodiment 19.

Claims

1. An orthopedic instrument for use with a surgical broach, An elongated body extending from a first end to a second end, wherein the first end is configured to be received by an automated surgical impactor, the elongated body comprising: (i) an upper surface having an elongated opening defined within the upper surface; (ii) a bottom surface opposite to the upper surface having an elongated opening defined within the bottom surface; (iii) one or more inner walls extending between the elongated opening defined within the upper surface and the elongated opening defined within the bottom surface; and (iv) a first cavity defined by the one or more inner walls. A first lever extending from a pivot end to a latch end, wherein the pivot end is pivotably connected to the elongated body, A second lever pivotably connected to the elongated body, the second lever having a hook extending toward the upper surface of the elongated body, A leaf spring having a first end pivotably connected to the first lever and a second end pivotably connected to the second lever, such that the movement of the first lever causes the movement of the second lever. A push button catch connected to the aforementioned elongated body, A stop pin connected to the elongated body and positioned within the first cavity, Equipped with, The first lever is movable between a first position in which the latch end is separated from the elongated body and a second position in which the latch end is captured by the push-button catch, and when the first lever is in the second position, the leaf spring biases the second lever, causing the hook to pivot toward the upper surface. The second lever is positioned within the first cavity, The pivot end of the first lever is pivotably connected to the elongated body within the first cavity, and the latch end of the first lever extends out of the first cavity through the elongated opening defined in the upper surface. The leaf spring is positioned within the first cavity, An orthopedic instrument in which, when the first lever is in the first position, the bottom surface of the pivot end of the first lever contacts the stop pin.

2. The orthopedic instrument according to claim 1, wherein the elongated body has a curved segment between the pivot end of the first lever and the second end of the elongated body.

3. The elongated body has a flat front surface located on the second end of the elongated body, A circular opening is defined on the flat front surface, and the circular opening opens into the first cavity. The orthopedic instrument according to claim 1.

4. The circular opening defines a passage into the first cavity, which is sized to receive the mounting post of the surgical broach. When the first lever is in the second position, the hook of the second lever is positioned within the passage. The orthopedic instrument according to claim 3.

5. The orthopedic instrument according to claim 4, wherein the guide post extends outward from the flat front surface of the elongated body, and the guide post is positioned between the circular opening and the bottom surface.

6. The elongated body comprises (i) a first side wall and a second side wall opposite the first side wall, (ii) an opening defined in the first side wall, (iii) one or more inner walls extending inward from the opening in the first side wall and defining a second cavity, and (iv) a second opening defined in the upper surface between the first end and the elongated opening and opening into the second cavity. The push button catch is located within the second cavity, The orthopedic instrument according to claim 1, wherein when the first lever is in the second position, the latch extending downward from the latch end is positioned within the second cavity and held by the push-button catch.

7. The orthopedic instrument according to claim 6, wherein the push-button catch is movable between a first position in which the push-button catch engages with the latch located in the second cavity and a second position in which the push-button catch does not engage with the latch.

8. The orthopedic instrument according to claim 7, further comprising a second spring positioned within the second cavity, wherein the second spring is configured to bias the push-button catch to the first position.

9. The orthopedic instrument according to claim 8, wherein the push button catch comprises a button surface positioned toward the first side wall of the elongated body, a pair of side walls extending from the button surface into the second cavity, a rear wall connecting the pair of side walls, and a catch extending from the rear wall into the second cavity.

10. The orthopedic instrument according to claim 9, wherein the latch of the first lever comprises a first cam surface, the catch of the push-button catch comprises a second cam surface, the first cam surface engages with the second cam surface when the first lever is moved from a first position to a second position, and the push-button catch is biased from a first position to a second position when the first cam surface engages with the second cam surface.

11. A surgical instrument assembly, Orthopedic instruments, An elongated body extending from a first end to a second end, wherein the first end is configured to be received by an automated surgical impactor, the elongated body comprising: (i) an upper surface having an elongated opening defined within the upper surface; (ii) a bottom surface opposite to the upper surface having an elongated opening defined within the bottom surface; (iii) one or more inner walls extending between the elongated opening defined within the upper surface and the elongated opening defined within the bottom surface; and (iv) a first cavity defined by the one or more inner walls. A first lever extending from a pivot end to a latch end, wherein the pivot end is pivotably connected to the elongated body, A second lever pivotably connected to the elongated body, the second lever comprising a hook extending toward the upper surface of the elongated body, A leaf spring having a first end pivotably connected to the first lever and a second end pivotably connected to the second lever, such that the movement of the first lever causes the movement of the second lever. A push button catch connected to the aforementioned elongated body, and A stop pin connected to the elongated body and positioned within the first cavity, Orthopedic instruments equipped with, A surgical broach connected to the second end of the orthopedic instrument, comprising a mounting post extending from the first end of the surgical broach, Equipped with, The first lever of the orthopedic instrument is movable between a first position in which the latch end is separated from the elongated body and a second position in which the latch end is captured by the push-button catch, and when the first lever is in the second position, the leaf spring biases the second lever, causing the hook to pivot and engage with the mounting post of the surgical broach. The second lever is positioned within the first cavity, The pivot end of the first lever is pivotably connected to the elongated body within the first cavity, and the latch end of the first lever extends out of the first cavity through the elongated opening defined in the upper surface. The leaf spring is positioned within the first cavity, An orthopedic instrument in which, when the first lever is in the first position, the bottom surface of the pivot end of the first lever contacts the stop pin.

Images