Reamer assembly

Abstract

A surgical reamer can include a casing and a shaft. The casing can include a proximal portion, including a collar, and a distal portion, including an aperture. The shaft can include a drive section and a reamer attached. The drive section of the shaft can be insertable through the aperture of the distal portion of the casing. The drive section can be configured to be installed on the collar. The shaft can include a first section and a second section. The first section can include a proximal section connected to the drive section and a tensioning joint distal to the drive section. The tensioning joint can be configured to tension the shaft within the casing. The second section can include a proximal section coupled to a distal section of the first section and a distal section connected to the reamer attachment.

Description

REAMER ASSEMBLYCLAIM OF PRIORITY

[0001] This application claims the benefit of U.S. Provisional Patent Application Serial No. 63 / 534,977, filed on August 28, 2023, the benefit of priority of which is claimed hereby, and which is incorporated by reference herein in its entirety.TECHNICAL FIELD

[0002] Examples described herein generally relate to medical instruments. More specifically, the examples described herein relate to reamer assemblies.BACKGROUND

[0003] Implants can be used to repair damaged hip and shoulder joints. In examples, a healthcare professional can install a stem implant to repair either of a shoulder or a hip join. There are both stem and stemless implants. Stem implants include a stem that can be implanted within a bone and include an engagement mechanism for engaging with a second bone (or a second prosthetic component) installed within the second bone. Stemless implants include a base inserted within the bone and include an engagement mechanism for engaging with a second bone (or second prosthetic component).

[0004] Regardless of whether the implant is a stem implant or stemless implant, the healthcare professional will prepare the bone of the patient to receive the implant. For example, the health care provider can use a reamer or a broach to prepare a bone to receive the implant. Different types of reamers can be used to prepare the bone to receive the implant based on the type of implant and the location of the bone that will receive the implant. For example, straight or offset reamers can be used to prepare the bone to receive an implant.SUMMARY

[0005] In examples, a surgical reamer can include a casing that can include a proximal portion including a collar, and a distal portion including an aperture. The surgical reamer can also include a shaft that can include a drive section and a reamer attachment. The shaft can be insertable into the casing. The shaft can extend between the drive section and the reamer attachment. The drive section of the shaft can be insertable through the aperture of the distal portion of the casing such that at least a portion of the distal portion of the casing is received within the reamer attachment. The drive section can be configured to be installed on the collar such that the drive section is proximal to the proximal portion of the casing. A first section can include a proximal section connected to the drive section. A tensioning joint can be distal to the drive section. The tensioning joint can be configured to tension the shaft within the casing on condition that the drive section is installed on the casing. A second section can include a proximal section coupled to a distal section of the first section and a distal section connected to the reamer attachment.

[0006] In examples, a surgical reamer system can include a straight casing with a proximal portion with a collar and a distal portion with an aperture. An offset casing can include a proximal portion with a collar and a distal portion with an aperture. The proximal portion of the offset casing can be axially misaligned with the distal portion of the offset casing. A shaft can include a drive section and a reamer attachment. The shaft can be selectively insertable into one of the straight casing or the offset casing. The shaft can extend between the drive section and the reamer section. The drive section of the shaft can be insertable through the aperture of the distal portion of the selected casing such that at least a portion of the distal portion of the selected casing can be received within the reamer attachment section. The drive section can be configured to be installed on the collar such that the drive section can be proximal to the proximal portion of the selected casing. A first section can include a proximal section connected to the drive section. A tensioning joint can be distal to the drive section. The tensioning joint can be configured to tension the shaft within the selected casing on condition that the drive section is installed on the casing. A second section can include a proximal sectioncoupled to a distal section of the first section and a distal section connected to the reamer attachment section.

[0007] In examples, a method of assembling a surgical reamer can include inserting a shaft through an aperture formed on a distal portion of a casing. The method can also include pulling a drive section beyond a proximal section of the casing so the drive section is installed proximal to the proximal section of the casing.BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Various examples are illustrated in the figures of the accompanying drawings. Such examples are demonstrative and not intended to be exhaustive or exclusive examples of the present subject matter.

[0009] FIG. 1 illustrates an isometric view of an example of a reamer assembly with an example of an offset casing.

[0010] FIG. 2 illustrates an isometric view of an example of a reamer assembly with an example of a straight casing.

[0011] FIG. 3 illustrates an exploded view of an example of a reamer assembly.

[0012] FIG.4 illustrates an isometric view of a partial exploded view of an example of a reamer assembly.

[0013] FIG. 5 illustrates an isometric view of an example of a reamer assembly.

[0014] FIG. 6 illustrates an isometric view of an example handle for a reamer assembly.

[0015] FIG. 7 illustrates a partial exploded view of an example handle being assembled onto an example reamer assembly.

[0016] FIG. 8 illustrates an isometric view of an example handle being adjusted on an example of a reamer assembly.

[0017] FIG. 9 illustrates an example system for a reamer assembly that can be assembled to create an offset or straight reamer assembly.

[0018] FIG. 10 illustrates a schematic view of a method of assembling an example of a reamer assembly.DETAILED DESCRIPTION

[0019] The inventors of the present disclosure have realized a need to have a reamer system that can support both straight and offset reamers. The reamer system that can support both straight and offset reamers can enable a healthcare provider to source a single system to handle the reaming needs of the healthcare professional. In examples, the system can include multiple components that work for both the straight and the offset reamers such as, for example, an adjustable handle, a u-joint shaft, and a tracking tower. The system can also include multiple components for the straight reamer such as, for example, a straight casing, a straight casing cap, and for the offset reamer such as, for example, an offset casing, an offset casing cap.

[0020] The above discussion is intended to provide an overview of subject matter of the present patent application. It is not intended to provide an exclusive or exhaustive explanation of the invention. The description below is included to provide further information about the present patent application.

[0021] FIGS. 1 and 2 will be discussed together below. FIG. 1 illustrates a perspective view of an example of a reamer assembly 100 with an example of an offset casing 102. FIG. 2 illustrates a perspective view of an example of the reamer assembly 100 with an example of a straight casing 104. The reamer assembly 100 can be used to prepare a bone (e.g., femur, scapula, tibia, humerus, pelvis, any other bone that can receive a stem or stemless implant, or the like) of a patient to receive an implant (e.g., a stem implant or a stemless implant). The reamer assembly 100 can include the offset casing 102 (as shown in FIG. 1) or the straight casing 104 (as shown in FIG. 2) and a shaft 112 (shown in FIG. 3).

[0022] The offset casing 102 can be configured to hold and support other components of the reamer assembly 100 with an offset, such that additional clearance around the bones of the patient, or other tools, restraints, or other surgical equipment to improve the access of the reamer assembly 100 as compared to straight casings. The offset casing 102 can extend between a proximal portion 105 and a distal portion 106. For example, the offset casing 102 can include a first axis 70, a second axis 80, and a third axis 90. The first axis 70 can extend from the proximal portion 105 toward the distal portion 106. The third axis 90 can extend from the distal portion 106 toward the proximalportion 105. The second axis 80 can extend between the first axis 70 and the third axis 90. As shown in FIG. 1, for the offset casing 102, each of the first axis 70, the second axis 80, and the third axis 90 can be axially misaligned. The proximal portion 105 can include a collar 108 (shown in FIG. 3). The distal portion 106 can include an aperture 110 (shown in FIG. 4).

[0023] The straight casing 104 can be configured to hold and support other components of the reamer assembly 100 such that they are aligned longitudinally with one another. The straight casing 104 can extend between a proximal portion 107 and a distal portion 109. The proximal portion 107 can include the collar 108 (shown in FIG. 5) and the distal portion 109 can include the aperture 110 (shown in FIG. 4).

[0024] The shaft 112 can be configured to receive a rotational motion from input by a medical professional (via the drive section 114) about a drive axis to rotate a reamer attached to a reamer attachment 116 of the reamer assembly 100 about a head axis, such as to ream and prepare a bone of a patient to receive an implant. The shaft 112 can be insertable into the casing (such as the offset casing 102 or the straight casing 104). The shaft 112 can extend between the drive section 114 and the reamer attachment 116. The drive section 114 of the shaft 112 can be insertable through the aperture 110 of the distal portion 106 of the casing (such as the offset casing 102 or the straight casing 104) such that at least a portion of the distal portion (the distal portion 106 or the distal portion 109) of the casing (offset casing 102 or the straight casing 104, respectively) is received within the reamer attachment 116. The drive section 114 can be configured to be installed on the collar 108 such that the drive section 114 is proximal to the proximal portion (the proximal portion 105 or the proximal portion 107) of the casing (such as the offset casing 102 or the straight casing 104, respectively).

[0025] As shown in FIGS. 1 and 2, the offset casing 102 and the straight casing 104 can each include a location tracker mount 132. The location tracker mount 132 can be configured to receive a location tracker tower 134. The location tracker tower 134 can be configured to communicate with a robotic surgical system such as to provide a reference point to allow the robotic surgical system, or other non-robotic surgery system, to track a location of the reamer assembly 100 during a surgical procedure.

[0026] FIGS. 3-5 will be discussed together below. FIG. 3 illustrates an exploded view of an example of the reamer assembly 100. FIG.4 illustrates a perspective view of a partial exploded view of the reamer assembly 100. FIG. 5 illustrates a perspective view of an example of the reamer assembly 100. FIGS. 3-5 also show orientation indicators Proximal and Distal.

[0027] The shaft 112 can include a first section 118. The first section 118 can include a proximal section 120 connected to the drive section 114 and a tensioning joint 122. The tensioning joint 122 can be located distal to the drive section 114 and can be configured to tension the shaft 112 within the casing (such as the offset casing 102 or the straight casing 104) on condition that the drive section 114 is installed on the casing (such as the offset casing 102 or the straight casing 104). In examples, the shaft 112 can also include a second section 124. The second section 124 can include a proximal section 126 coupled to a distal section 128 of the first section 118 and a distal section 130 connected to the reamer attachment 116. The tensioning joint 122 can include a spring, or other tension generation item, to increase a tension within the shaft 112 as the drive section 114 is axially pulled or moved away (e.g., proximally away) from the reamer attachment 116. The shaft 112 can include a first axis 71 , a second axis 81 , and a third axis 91.

[0028] The offset casing 102 can be offset such that the drive section 114 and the first section 118 of the shaft 112 are not axially aligned with the second section 124 and the reamer attachment 116 of the shaft 112 when the shaft 112 is installed within the offset casing 102, and, optionally, such that the drive section 114 and the reamer attachment are axially parallel. The offset of the offset casing 102 can also be offset such that the second section 124 of the shaft 112 is not axially aligned with the reamer attachment 116 of the shaft 112 when the shaft 112 is installed within the offset casing 102. For example, the first axis 70, the second axis 80, and the third axis 90 of the offset casing 102 can each be aligned with the first axis 71, the second axis 81, and the third axis 91 of the shaft 112, respectively, such that the first axis 70, the second axis 80, and the third axis 90 of the offset casing 102 are misaligned and the first axis 71, the second axis 81 , and the third axis 91 of the shaft 112 are also respectively misaligned with one another.

[0029] The straight casing 104 can be configured such that the drive section 114, the first section 118, the second section 124, and the reamer attachment 116 of the shaft 112 can be axially aligned when the shaft 112 is installed within the straight casing 104. For example, the first axis 70, the second axis 80, and the third axis 90 of the straight casing 104 and the first axis 71, the second axis 81, and the third axis 91 of the shaft 112 can all be aligned, respectively, when the shaft 112 is installed in the straight casing 104. The inventors of the present disclosure also contemplate other alignments, or misalignments, that can be achieved with the shaft 112 and another shape of the casing, such as a C-shape, S-shape, U-shape, L-shape, 45 degrees offset, 90 degree offset, or the like.

[0030] The shaft 112 can include a first u-joint 136 and a second u-joint 138. The first u-joint 136 and the second u-joint 138 can each be configured to rotate about at least one axis of rotation while transferring rotational force therethrough while in a bent configuration or a straight configuration such that the shaft 112 can be installed in either of the offset casing 102 or the straight casing 104. The first u-joint 136 can be coupled to the proximal section 120 of the first section 118 and the proximal section 126 of the second section 124. The first u-joint 136 can be coupled to the distal section 130 of the second section 124 and a proximal portion 140 of the reamer attachment 116.

[0031] The inventors of the present disclosure also contemplate other alignments, or misalignments, that can be achieved with the shaft 112 and another shape of the casing, as discussed above. For example, another u-joint can be added to the shaft 112 such that the shaft 112 can include another offset or bend as the shaft 112 is installed within the casing. In examples, the shaft 112 as shown in FIGS. 3 and 4 can be put into yet another casing such that the alignment of the shaft 112 changes. For example, the reamer attachment 116 can be offset from the rest of the shaft 112 or the drive section 114 can be offset from the rest of the shaft 112. In examples, the first section 118 or the second section 124 can be offset from any of the other components (e.g., drive section 114, the reamer attachment 116, the first section 118, the tensioning joint 122, or the like) of the shaft 112.

[0032] Optionally, the reamer assembly 100 can include a casing cap 142 (as shown in FIG. 3). The casing cap 142 can be offset and can be configured to be installedin the offset casing 102 (of FIG. 1). The casing cap 142 can be installed in the offset casing 102 such that the offset casing 102 and the casing cap 142 at least partially surround the first section 118 and the second section 124 of the shaft 112. The casing cap 142 can also be straight (as first shown in FIG. 9) and can be configured to be installed in the straight casing 104 (of FIG. 2). In examples, the casing cap 142 can be installed in the straight casing 104 such that the straight casing 104 and the casing cap 142 at least partially surround the first section 118 and the second section 124 of the shaft 112. The casing cap 142 can help to cover moving parts (such as the shaft 112) when the reamer assembly 100 is in operation to help prevent injuries due the rotation of the shaft 112. Additionally, the casing cap 142 and the offset casing 102 and the straight casing 104 each can have grooves, slots, ridges, or the like on an outer surface thereof, such as to help the medical professional grip the reamer assembly 100 during reaming operations.

[0033] As shown in FIG. 5, when the casing cap 142 is not installed on the offset casing 102 (or the straight casing 104) the medical professional can contact the shaft 112 during operation of the reamer assembly 100. Thus, the casing cap 142 helps protect the medical professional during the operation of the reamer assembly 100 by surrounding and covering the shaft 112 once the casing cap 142 is installed in the offset casing 102 or the straight casing 104.

[0034] As also shown in FIG. 5, the offset casing 102 can include a retaining mechanism 150 connected to a radially or laterally inner portion or surface of the offset casing 102. The retaining mechanism can be configured to connect the offset casing 102 to the shaft 112 such as to secure the shaft 112 within the offset casing 102. The retaining mechanism 150 can include one or more of clips, hooks, or the like. During the installation of the shaft 112 within the offset casing 102, the shaft 112 can be pushed into the retaining mechanism 150 to secure the shaft 112 within the offset casing 102.

[0035] Similar to the offset casing 102 (shown in FIG. 5), the straight casing 104 can also include a plurality of apertures 144 to secure the shaft 112 within the straight casing 104 by attaching the handle 600 to any one of the plurality of apertures 144. Like the offset casing 102, during installation of the shaft 112 within the straight casing 104, the shaft 112 can be pushed into the retaining mechanism 150 to secure the shaft 112 within the straight casing 104. In examples, the retaining mechanism 150 can extendfrom the offset casing 102 or the straight casing 104 and can at least partially surround the shaft 112 as the shaft 112 is installed within either of the offset casing 102 or the straight casing 104.

[0036] In examples, the retaining mechanism 150 can be another component (e.g., not a single body or single unit with the offset casing 102 or the straight casing 104) of the reamer assembly 100 that is provided to the medical professional separate from the offset casing 102 or the straight casing 104. Here, the retaining mechanism 150 can be inserted into attachment interfaces of the offset casing 102 or the straight casing 104 after the shaft 112 is installed in the offset casing 102 or the straight casing 104 to at least partially surround the shaft 112.

[0037] As shown in FIG. 5, the collar 108 can include a slot 111. The slot 111 can be configured to receive the shaft 112 such that the shaft 112 can be installed within the collar 108 and the drive section 114 can be proximal the proximal portion (the proximal portion 105 or the distal portion 109) of the casing (the offset casing 102 or the straight casing 104, respectively). The collar 108 can be configured to support the drive section 114 of the shaft 112 after the shaft 112 is installed within the casing (e.g., the offset casing 102 or the straight casing 104).

[0038] The proximal portion 105 of the offset casing 102, the proximal portion 107 of the straight casing 104, and the casing cap 142 can include a plurality of apertures 144 circumferentially spaced around the offset casing 102, the straight casing 104, and the casing cap 142, respectively. The plurality of apertures 144 can be configured to provide adjustability of an adjustable handle (shown in FIGS. 6-7) such that the handle can be rotated about the offset casing 102, the straight casing 104, and the casing cap 142. The handle and the adjustability of that handle will be discussed with reference to FIGS. 6-7.

[0039] FIGS. 6-7 will be discussed together below. FIG. 6 illustrates a perspective view of an example handle 600 for the reamer assembly 100. FIG. 7 illustrates a partial exploded view of the handle 600 being assembled onto the reamer assembly 100. FIG. 8 illustrates a perspective view of the handle 600 being adjusted about the reamer assembly 100.

[0040] The handle 600 can be provided on the reamer assembly 100 to improve ergonomics and improve control of the reamer assembly 100 for the medical professional during the reaming operations. For example, the handle 600 can be configured to decrease vibration and increase control of the reamer assembly 100 during reaming operations to reduce fatigue and improve control of the reamer assembly 100 during reaming operations. The handle 600 can be an adjustable handle such that the handle 600 can be rotated about the offset casing 102 or the straight casing 104 of the reamer assembly 100. In examples, the handle 600 can include a sleeve portion 602, a handle portion 604, and a plunger assembly 606.

[0041] The sleeve portion 602 can be configured to be installed over the proximal portion of the casing. As such, the sleeve portion 602 of the handle 600 can help secure the casing cap 142 to the offset casing 102 or the straight casing 104. The sleeve portion 602 can have an internal diameter that is slightly larger than the casing cap 142, the offset casing 102, and the straight casing 104 such that the sleeve portion 602 fits around, and can slide onto, the casing cap 142 and the offset casing 102 or the straight casing 104.

[0042] The handle portion 604 can extend from the sleeve portion 602. The handle portion 604 can be configured to allow the medical professional to grasp and hold the handle 600 during reaming operations with the reamer assembly 100. The handle portion 604 can include ridges, grooves, or any other surface finish (e.g., to increase friction between the medical professional’s hand and the handle portion 604) to help the medical professional retain the handle portion 604. The handle portion 604 can also include an ergonomic profile to help the handle portion 604 fit within the hand of the medical professional. The handle portion 604 can also include a coating, insert, or other surface that can reduce the vibrations felt by the medical professional during reaming operations with the reamer assembly 100 and can improve the medical professionals ability to grip the reamer assembly 100.

[0043] The plunger assembly 606 can enable the handle 600 to be adjusted on the reamer assembly 100. In examples, the plunger assembly 606 can selectively engage with any aperture of the plurality of apertures 144 (FIG. 7) formed in the casing cap 142, theoffset casing 102, or the straight casing 104 to determine a position of the handle 600 about the offset casing 102 or the straight casing 104 and the casing cap 142.

[0044] The plunger assembly 606 can include a protrusion 608 that extends from the plunger assembly 606 and through the handle portion 604 to engage with any of the plurality of apertures 144. As shown in FIG. 6, the protrusion 608 can be cylindrical. In examples, the protrusion 608 can be a peg, post, or include any shape that can engage with the plurality of apertures 144 to secure and adjust the handle 600 about the reamer assembly 100.

[0045] The plunger assembly 606 can include a biasing member 610 that can engage with the protrusion 608 and the handle portion 604 (or other component of the handle 600) such as to bias the plunger assembly 606 to an extended configuration such that the plunger assembly 606 is operable to adjust a position of the handle 600 about the reamer assembly 100 (e.g., the offset casing 102 or the straight casing 104).

[0046] The plunger assembly 606 can include an engagement collar 612 that at least partially surrounds the handle portion 604 adjacent to the sleeve portion 602. The plunger assembly 606 can be operably connected to the protrusion 608 to translate the protrusion 608 between the extended configuration (shown in FIG. 6) and a retracted configuration. In the retracted configuration the protrusion 608 does not contact any apertures of the plurality of apertures 144 when the sleeve portion 602 is installed on the offset casing 102 or the straight casing 104, such that the handle 600 can be adjusted about the offset casing 102 or the straight casing 104. Additionally, in the retracted configuration, the handle 600 can be removed from or installed onto the offset casing 102 or the straight casing 104. When the engagement collar 612 is released, the biasing member 610 can bias the plunger assembly 606 to the extended configuration, such as to insert into one of the plurality of apertures 144 to secure or fix an orientation of the handle 600 with respect to the reamer assembly 100. Because the plunger assembly 606 is biased to the extended configuration, a force may be required to disengage the plunger assembly 606 from the plurality of apertures 144 to allow the handle 600 to be unlocked or removed from the reamer assembly 100, helping to keep the handle 600 secured to the reamer assembly 100 such as during reaming operations.

[0047] FIG. 9 illustrates an example system 900 for a reamer assembly (e.g., the reamer assembly 100 (FIG. 1)) that can be assembled to create an offset or straight reamer assembly. The system 900 can be sent to the medical professional as a single system or assembly and can be used by the medical professional as an offset reamer or a straight reamer to prepare a bone of the patient to receive an implant. As discussed herein, some of the components of the system 900 can be used for both of the offset and straight configurations of the system 900, and some of the components can be unique to either of the offset or straight configurations. Hereinafter, the offset configuration will be discussed as the offset set 902 and the straight configuration will be discussed as the straight set 904.

[0048] The offset set 902 can include an offset casing (e.g., the offset casing 102) and an offset version of the casing cap 142. The straight set 904 can include a straight casing (e.g., the straight casing 104) and a straight version of the casing cap 142. Thus, the system 900 can include both of an offset and a straight casing cap 142 such that the respective casing cap the offset and straight casing cap 142 can be used with the offset casing 102 and the straight casing 104, respectively. Each of the offset set 902 and the straight set 904 can interchangeably use the shaft 112, the location tracker tower 134, or the handle 600.

[0049] In examples, the medical professional can receive the system 900 and preoperative ly or intraoperatively prepare either the offset reamer or the straight reamer by using the offset set 902 or the straight set 904, respectively, with the shaft 112, the location tracker tower 134, or the handle 600. The medical professional can also switch from the offset or the straight reamer to the other of the offset or straight reamer by disassembling the reamer and using the components of the respective offset set 902 or the straight set 904 to assemble the opposite of the respective reamer.

[0050] FIG. 10 illustrates a schematic view of a method of assembling an example of a reamer assembly. The steps or operations of the method 1000 are illustrated in a particular order for convenience and clarity; many of the discussed operations can be performed in a different sequence or in parallel without materially impacting other operations. The method 1000, as discussed, can include operations performed by multiple different actors, devices, or systems. It is understood that subsets of the operationsdiscussed in the method 1000 can be attributable to a single actor, device, or system could be considered a separate standalone process or method. The method 1000 can optionally include any operations discussed above or below.

[0051] At operation 1005, the method 1000 can optionally include inserting a shaft (such as the shaft 112 (FIG. 3)) through an aperture (e.g., the aperture 110 (FIG. 4)) on a distal portion of the casing (e.g., the offset casing 102 (FIG. 1) or the straight casing 104 (FIG. 2)). In examples, to make the offset reamer, the shaft can be inserted through the offset casing 102 and, to make a straight reamer, the shaft can be inserted through the straight casing 104).

[0052] At operation 1010, the method 1000 can optionally include pulling a drive section (e.g., the drive section 114) of the shaft (e.g., the shaft 112) beyond a proximal end (e.g., the proximal portion 105 or the proximal portion 107) of the casing (e.g., the offset casing 102 or the straight casing 104, respectively).

[0053] At operation 1015, the method 1000 can optionally include inserting a casing cap (e.g., the casing cap 142 (FIG. 3)) such that the casing cap and the casing (e.g., either of the offset casing 102 or the straight casing 104) surround the shaft (e.g., the shaft 112 (FIG. 3)).

[0054] At operation 1020, the method 1000 can optionally include inserting the casing (e.g., either of the offset casing 102 or the straight casing 104), the casing cap (e.g., the casing cap 142), and the shaft (e.g., the shaft 112) within a collar (e.g., the sleeve portion 602 (FIG. 6) of the handle portion (e.g., the handle 600 (FIG. 6) such that the handle (e.g., the handle 600) holds the casing cap (e.g., the casing cap 142) and the casing (e.g., the offset casing 102 or the straight casing 104) together.

[0055] The following, non-limiting examples, detail certain aspects of the present subject matter to solve the challenges and provide the benefits discussed herein, among others.

[0056] Example 1 is a surgical reamer comprising: a casing including: a proximal portion including a collar; and a distal portion including an aperture; and a shaft including: a drive section and a reamer attachment, the shaft insertable into the casing, the shaft extending between the drive section and the reamer attachment, the drive section of the shaft insertable through the aperture of the distal portion of the casing such that atleast a portion of the distal portion of the casing is received within the reamer attachment, and the drive section configured to be installed on the collar such that the drive section is proximal to the proximal portion of the casing; a first section including: a proximal section connected to the drive section; and a tensioning joint distal to the drive section, the tensioning joint configured to tension the shaft within the casing on condition that the drive section is installed on the casing; and a second section including: a proximal section coupled to a distal section of the first section; and a distal section connected to the reamer attachment.

[0057] In Example 2, the subject matter of Example 1 includes, wherein the shaft comprises: a first u-joint coupled to the distal portion of the first section and the proximal portion of the second section; and a second u-joint coupled to the distal portion of the second section and a proximal portion of the reamer attachment.

[0058] In Example 3, the subject matter of Examples 1-2 includes, a casing cap configured to be installed in the casing such that the casing and the casing cap surround the first section and the second section of the shaft.

[0059] In Example 4, the subject matter of Example 3 includes, wherein the proximal portion of the casing includes a plurality of apertures circumferentially spaced around the casing.

[0060] In Example 5, the subject matter of Example 4 includes, an adjustable handle assembly including: a sleeve portion configured to be installed over the proximal portion of the casing; a handle portion extending from the sleeve portion; and a plunger assembly operable to selectively engage with any aperture of the plurality of apertures of the casing to determine a position of the adjustable handle assembly about the casing.

[0061] In Example 6, the subject matter of Example 5 includes, wherein the plunger assembly comprises a biasing member engageable with the plunger assembly and the sleeve portion to bias the plunger assembly in an extended configuration such that the plunger is operable to adjust the position of the adjustable handle assembly about the casing.

[0062] In Example 7, the subject matter of Examples 5-6 includes, wherein the plurality of apertures is formed in the casing and the casing cap, and wherein the casingand the casing cap are receivable by the sleeve portion of the adjustable handle assembly to secure the casing and the casing cap together.

[0063] In Example 8, the subject matter of Examples 1-7 includes, wherein the casing is configured such that the drive section, the first section, the second section, and the reamer attachment are axially aligned when the shaft is installed within the casing.

[0064] In Example 9, the subject matter of Examples 1-8 includes, wherein the casing is offset such that the drive section and the first section are not axially aligned with the second section and the reamer attachment when the shaft is installed within the casing, and such that the second section is not axially aligned with the reamer attachment when the shaft is installed within the casing.

[0065] Example 10 is a surgical reamer system comprising: a straight casing including: a proximal portion including a collar; and a distal portion including an aperture; an offset casing including: a proximal portion including a collar; and a distal portion including an aperture, the proximal portion of the offset casing is axially misaligned with the distal portion of the offset casing; and a shaft including: a drive section and a reamer attachment, the shaft selectively insertable into one of the straight casing or the offset casing, the shaft extending between the drive section and the reamer section, the drive section of the shaft insertable through the aperture of the distal portion of the selected casing such that at least a portion of the distal portion of the selected casing is received within the reamer attachment section, and the drive section configured to be installed on the collar such that the drive section is proximal to the proximal portion of the selected casing; a first section including: a proximal section connected to the drive section; and a tensioning joint distal to the drive section, the tensioning joint configured to tension the shaft within the selected casing on condition that the drive section is installed on the casing; and a second section including: a proximal section coupled to a distal section of the first section; and a distal section connected to the reamer attachment section.

[0066] In Example 11, the subject matter of Example 10 includes, wherein the shaft comprises: a first u-joint coupled to the distal portion of the first section and the proximal portion of the second section; and a second u-joint coupled to the distal portion of the second section and a proximal portion of the reamer attachment.

[0067] In Example 12, the subject matter of Examples 10-11 includes, a casing cap configured to be selectively installed in either of the straight casing or the offset casing such that the respective casing and the casing cap surround the first section and the second section of the shaft.

[0068] In Example 13, the subject matter of Example 12 includes, wherein the proximal portion of each of the straight casing and the offset casing include a plurality of apertures circumferentially spaced around the casing.

[0069] In Example 14, the subject matter of Example 13 includes, an adjustable handle assembly including: a sleeve portion configured to be selectively installed over the proximal portion of either one of the straight casing or the offset casing; a handle portion extending from the sleeve portion; and a plunger assembly operable to selectively engage with any aperture of the plurality of apertures of the casing to determine a position of the adjustable handle assembly about the respective casing.

[0070] In Example 15, the subject matter of Example 14 includes, wherein the plunger assembly comprises a biasing member engageable with the plunger assembly and the sleeve portion to bias the plunger assembly in an extended configuration such that the plunger is operable to adjust the position of the adjustable handle assembly about the casing.

[0071] In Example 16, the subject matter of Examples 14-15 includes, wherein the plurality of apertures is formed in either of the straight casing or the offset casing and the casing cap, and wherein either of the straight casing or the offset casing and the casing cap are receivable by the sleeve portion of the adjustable handle assembly to secure the respective casing and the casing cap together.

[0072] In Example 17, the subject matter of Examples 10-16 includes, wherein the straight casing is configured such that the drive section, the first section, the second section, and the reamer attachment are axially aligned when the shaft is installed within the straight casing.

[0073] In Example 18, the subject matter of Examples 10-17 includes, wherein the offset casing is offset such that the drive section and the first section are not axially aligned with the second section and the reamer attachment when the shaft is installedwithin the offset casing, and such that the second section is not axially aligned with the reamer attachment when the shaft is installed within the offset casing.

[0074] Example 19 is a method of assembling a surgical reamer, the method comprising: inserting a shaft through an aperture formed on a distal portion of a casing; and pulling a drive section of the shaft beyond a proximal section of the casing such that the drive section is installed proximal to the proximal section of the casing.

[0075] In Example 20, the subject matter of Example 19 includes, inserting a casing cap such that the casing cap and the casing surround the shaft; and inserting the casing, the casing cap, and the shaft within a collar of a handle portion such that the handle holds the casing cap and the casing together, wherein the handle can be adjusted to rotate about the casing, the casing cap, and the shaft.

[0076] Example 21 is an apparatus comprising means to implement any of Examples 1-20.

[0077] Example 22 is a system to implement any of Examples 1-20.

[0078] Example 23 is a method to implement any of Examples 1-20.

[0079] Example 24 is an apparatus, system, or method to implement any elements of any of Examples 1-20.

[0080] The above detailed description includes references to the accompanying drawings, which form a part of the detailed description. The drawings show, by way of illustration, specific examples that may be practiced. These embodiments are also referred to herein as “examples.” Such examples may include elements in addition to those shown or described. However, the present inventors also contemplate examples in which only those elements shown or described are provided. Moreover, the present inventors also contemplate examples using any combination or permutation of those elements shown or described (or one or more aspects thereof), either with respect to a particular example (or one or more aspects thereof), or with respect to other examples (or one or more aspects thereof) shown or described herein.

[0081] All publications, patents, and patent documents referred to in this document are incorporated by reference herein in their entirety, as though individually incorporated by reference. In the event of inconsistent usages between this document and those documents so incorporated by reference, the usage in the incorporated reference(s)should be considered supplementary to that of this document; for irreconcilable inconsistencies, the usage in this document controls.

[0082] In this document, the terms “a” or “an” are used, as is common in patent documents, to include one or more than one, independent of any other instances or usages of “at least one” or “one or more.” In this document, the term “or” is used to refer to a nonexclusive or, such that “A or B” includes “A but not B,” “B but not A,” and “A and B,” unless otherwise indicated. In the appended claims, the terms “including” and “in which” are used as the plain-English equivalents of the respective terms “comprising” and “wherein.” Also, in the following claims, the terms “including” and “comprising” are open-ended, that is, a system, device, article, or process that includes elements in addition to those listed after such a term in a claim are still deemed to fall within the scope of that claim. Moreover, in the following claims, the terms “first,” “second,” and “third,” etc. are used merely as labels, and are not intended to impose numerical requirements on their objects.

[0083] The term “about,” as used herein, means approximately, in the region of, roughly, or around. When the term “about” is used in conjunction with a numerical range, it modifies that range by extending the boundaries above and below the numerical values set forth. In general, the term “about” is used herein to modify a numerical value above and below the stated value by a variance of 10%. In one aspect, the term “about” means plus or minus 10% of the numerical value of the number with which it is being used. Therefore, about 50% means in the range of 45%-55%. Numerical ranges recited herein by endpoints include all numbers and fractions subsumed within that range (e.g., 1 to 5 includes 1, 1.5, 2, 2.75, 3, 3.90, 4, 4.24, and 5). Similarly, numerical ranges recited herein by endpoints include subranges subsumed within that range (e.g., 1 to 5 includes 1-1.5, 1.5-2, 2-2.75, 2.75-3, 3-3.90, 3.90-4, 4-4.24, 4.24-5, 2-5, 3-5, 1-4, and 2-4). It is also to be understood that all numbers and fractions thereof are presumed to be modified by the term “about.”

[0084] The above description is intended to be illustrative, and not restrictive. For example, the above-described examples (or one or more aspects thereof) may be used in combination with each other. Other examples may be used, such as by one of ordinary skill in the art upon reviewing the above description. The Abstract is to allow the readerto quickly ascertain the nature of the technical disclosure and is submitted with the understanding that it will not be used to interpret or limit the scope or meaning of the claims. Also, in the above Detailed Description, various features may be grouped together to streamline the disclosure. This should not be interpreted as intending that an unclaimed disclosed feature is essential to any claim. Rather, inventive subject matter may lie in less than all features of a particular disclosed embodiment. Thus, the following claims are hereby incorporated into the Detailed Description, with each claim standing on its own as a separate embodiment. The scope of the examples should be determined with reference to the appended claims, along with the full scope of equivalents to which such claims are entitled.

Claims

CLAIMS1. A surgical reamer comprising: a casing including: a proximal portion including a collar; and a distal portion including an aperture; and a shaft including: a drive section and a reamer attachment, the shaft insertable into the casing, the shaft extending between the drive section and the reamer attachment, the drive section of the shaft insertable through the aperture of the distal portion of the casing such that at least a portion of the distal portion of the casing is received within the reamer attachment, and the drive section configured to be installed on the collar such that the drive section is proximal to the proximal portion of the casing; a first section including: a proximal section connected to the drive section; and a tensioning joint distal to the drive section, the tensioning joint configured to tension the shaft within the casing on condition that the drive section is installed on the casing; and a second section including: a proximal section coupled to a distal section of the first section; and a distal section connected to the reamer attachment.

2. The surgical reamer of claim 1, wherein the shaft comprises: a first u-joint coupled to the distal portion of the first section and the proximal portion of the second section; anda second u-joint coupled to the distal portion of the second section and a proximal portion of the reamer attachment.

3. The surgical reamer of claim 1, comprising: a casing cap configured to be installed in the casing such that the casing and the casing cap surround the first section and the second section of the shaft.

4. The surgical reamer of claim 3, wherein the proximal portion of the casing includes a plurality of apertures circumferentially spaced around the casing.

5. The surgical reamer of claim 4, comprising: an adjustable handle assembly including: a sleeve portion configured to be installed over the proximal portion of the casing; a handle portion extending from the sleeve portion; and a plunger assembly operable to selectively engage with any aperture of the plurality of apertures of the casing to determine a position of the adjustable handle assembly about the casing.

6. The surgical reamer of claim 5, wherein the plunger assembly comprises a biasing member engageable with the plunger assembly and the sleeve portion to bias the plunger assembly in an extended configuration such that the plunger is operable to adjust the position of the adjustable handle assembly about the casing.

7. The surgical reamer of claim 5, wherein the plurality of apertures is formed in the casing and the casing cap, and wherein the casing and the casing cap are receivable by the sleeve portion of the adjustable handle assembly to secure the casing and the casing cap together.

8. The surgical reamer of claim 1, wherein the casing is configured such that the drive section, the first section, the second section, and the reamer attachment are axially aligned when the shaft is installed within the casing.

9. The surgical reamer of claim 1, wherein the casing is offset such that the drive section and the first section are not axially aligned with the second section and the reamer attachment when the shaft is installed within the casing, and such that the second section is not axially aligned with the reamer attachment when the shaft is installed within the casing.

10. A surgical reamer system comprising: a straight casing including: a proximal portion including a collar; and a distal portion including an aperture; an offset casing including: a proximal portion including a collar; and a distal portion including an aperture, the proximal portion of the offset casing is axially misaligned with the distal portion of the offset casing; and a shaft including: a drive section and a reamer attachment, the shaft selectively insertable into one of the straight casing or the offset casing, the shaft extending between the drive section and the reamer section, the drive section of the shaft insertable through the aperture of the distal portion of the selected casing such that at least a portion of the distal portion of the selected casing is received within the reamer attachment section, and the drive section configured to be installed on the collar such that the drive section is proximal to the proximal portion of the selected casing;a first section including: a proximal section connected to the drive section; and a tensioning joint distal to the drive section, the tensioning joint configured to tension the shaft within the selected casing on condition that the drive section is installed on the casing; and a second section including: a proximal section coupled to a distal section of the first section; and a distal section connected to the reamer attachment section.

11. The surgical reamer of claim 10, wherein the shaft comprises: a first u-joint coupled to the distal portion of the first section and the proximal portion of the second section; and a second u-joint coupled to the distal portion of the second section and a proximal portion of the reamer attachment.

12. The surgical reamer of claim 10, comprising: a casing cap configured to be selectively installed in either of the straight casing or the offset casing such that the respective casing and the casing cap surround the first section and the second section of the shaft.

13. The surgical reamer of claim 12, wherein the proximal portion of each of the straight casing and the offset casing include a plurality of apertures circumferentially spaced around the casing.

14. The surgical reamer of claim 13, comprising: an adjustable handle assembly including:a sleeve portion configured to be selectively installed over the proximal portion of either one of the straight casing or the offset casing; a handle portion extending from the sleeve portion; and a plunger assembly operable to selectively engage with any aperture of the plurality of apertures of the casing to determine a position of the adjustable handle assembly about the respective casing.

15. The surgical reamer of claim 14, wherein the plunger assembly comprises a biasing member engageable with the plunger assembly and the sleeve portion to bias the plunger assembly in an extended configuration such that the plunger is operable to adjust the position of the adjustable handle assembly about the casing.

16. The surgical reamer of claim 14, wherein the plurality of apertures is formed in either of the straight casing or the offset casing and the casing cap, and wherein either of the straight casing or the offset casing and the casing cap are receivable by the sleeve portion of the adjustable handle assembly to secure the respective casing and the casing cap together.

17. The surgical reamer of claim 10, wherein the straight casing is configured such that the drive section, the first section, the second section, and the reamer attachment are axially aligned when the shaft is installed within the straight casing.

18. The surgical reamer of claim 10, wherein the offset casing is offset such that the drive section and the first section are not axially aligned with the second section and the reamer attachment when the shaft is installed within the offset casing, and such that the second section is not axially aligned with the reamer attachment when the shaft is installed within the offset casing.

19. A method of assembling a surgical reamer, the method comprising: inserting a shaft through an aperture formed on a distal portion of a casing; and pulling a drive section of the shaft beyond a proximal section of the casing such that the drive section is installed proximal to the proximal section of the casing.

20. The method of claim 19, comprising: inserting a casing cap such that the casing cap and the casing surround the shaft; and inserting the casing, the casing cap, and the shaft within a collar of a handle portion such that the handle holds the casing cap and the casing together, wherein the handle can be adjusted to rotate about the casing, the casing cap, and the shaft.

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