US20170100133A1 - Extramedullary resection guide and methods - Google Patents
Extramedullary resection guide and methods Download PDFInfo
- Publication number
- US20170100133A1 US20170100133A1 US15/388,609 US201615388609A US2017100133A1 US 20170100133 A1 US20170100133 A1 US 20170100133A1 US 201615388609 A US201615388609 A US 201615388609A US 2017100133 A1 US2017100133 A1 US 2017100133A1
- Authority
- US
- United States
- Prior art keywords
- femur
- light emitter
- positioning system
- bone cut
- positioning assembly
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
- XURVRZSODRHRNK-UHFFFAOYSA-N C=C(C=CC=C1)C1=C Chemical compound C=C(C=CC=C1)C1=C XURVRZSODRHRNK-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/14—Surgical saws ; Accessories therefor
- A61B17/15—Guides therefor
- A61B17/154—Guides therefor for preparing bone for knee prosthesis
- A61B17/155—Cutting femur
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/16—Bone cutting, breaking or removal means other than saws, e.g. Osteoclasts; Drills or chisels for bones; Trepans
- A61B17/17—Guides or aligning means for drills, mills, pins or wires
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/16—Bone cutting, breaking or removal means other than saws, e.g. Osteoclasts; Drills or chisels for bones; Trepans
- A61B17/17—Guides or aligning means for drills, mills, pins or wires
- A61B17/1703—Guides or aligning means for drills, mills, pins or wires using imaging means, e.g. by X-rays
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/16—Bone cutting, breaking or removal means other than saws, e.g. Osteoclasts; Drills or chisels for bones; Trepans
- A61B17/17—Guides or aligning means for drills, mills, pins or wires
- A61B17/1714—Guides or aligning means for drills, mills, pins or wires for applying tendons or ligaments
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/16—Bone cutting, breaking or removal means other than saws, e.g. Osteoclasts; Drills or chisels for bones; Trepans
- A61B17/17—Guides or aligning means for drills, mills, pins or wires
- A61B17/1739—Guides or aligning means for drills, mills, pins or wires specially adapted for particular parts of the body
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/16—Bone cutting, breaking or removal means other than saws, e.g. Osteoclasts; Drills or chisels for bones; Trepans
- A61B17/17—Guides or aligning means for drills, mills, pins or wires
- A61B17/1739—Guides or aligning means for drills, mills, pins or wires specially adapted for particular parts of the body
- A61B17/1764—Guides or aligning means for drills, mills, pins or wires specially adapted for particular parts of the body for the knee
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B90/00—Instruments, implements or accessories specially adapted for surgery or diagnosis and not covered by any of the groups A61B1/00 - A61B50/00, e.g. for luxation treatment or for protecting wound edges
- A61B90/10—Instruments, implements or accessories specially adapted for surgery or diagnosis and not covered by any of the groups A61B1/00 - A61B50/00, e.g. for luxation treatment or for protecting wound edges for stereotaxic surgery, e.g. frame-based stereotaxis
- A61B90/11—Instruments, implements or accessories specially adapted for surgery or diagnosis and not covered by any of the groups A61B1/00 - A61B50/00, e.g. for luxation treatment or for protecting wound edges for stereotaxic surgery, e.g. frame-based stereotaxis with guides for needles or instruments, e.g. arcuate slides or ball joints
- A61B90/13—Instruments, implements or accessories specially adapted for surgery or diagnosis and not covered by any of the groups A61B1/00 - A61B50/00, e.g. for luxation treatment or for protecting wound edges for stereotaxic surgery, e.g. frame-based stereotaxis with guides for needles or instruments, e.g. arcuate slides or ball joints guided by light, e.g. laser pointers
Abstract
A bone cut positioning system and associated method are disclosed. The bone cut positioning system can include a positioning assembly, including a femoral attachment member, including a tongue with at least one fixation aperture configured to be fixed to a distal end of a femur. The positioning assembly can further include a light emitter mounting member configured to receive a light emitter, a channel configured to receive a depth selector slide, and a varus-valgus adjustment member configured to adjust a position of the positioning assembly relative to the femur to achieve a desired varus-valgus angle. A flexion-extension adjustment member can be configured to adjust a flexion-extension position of the positioning assembly relative to a flexion-extension of a knee joint and a guide member can be configured to extend from the depth selector slide
Description
- This application is a continuation of U.S. patent application Ser. No. 13/789,049, filed on Mar. 7, 2013, the benefit of priority of which is claimed hereby, and which is incorporated by reference herein in its entirety.
- The present disclosure relates to bone cut positioning systems, and more specifically, to femoral bone cut positioning systems.
- Orthopedic procedures for the replacement of all, or a portion of, a patient's joint typically require resecting (cutting) or reshaping the ends of the bones forming the joint. For example, total knee arthroplasty (“TKA”) procedures typically include cutting open the knee, displacing the patella, resecting bone from the distal end of the femur, resecting bone from the proximal end of the tibia to prepare the joint for prosthetic femoral and tibial implant components. Resecting the distal end of the femur often involves making one or more cuts including a planar distal cut. Resecting the proximal end of the tibia often involves making a planar proximal cut. In view of the foregoing surgical steps, TKA procedures are invasive, but typically effective.
- TKA procedures can be complicated by the fact that a mechanical axis of the leg does not typically line up with the anatomic axis or intramedullary canal. The mechanical axis includes a line from the center of a proximal joint to a distal joint of a long bone (e.g., femur or tibia), such that the mechanical axis is straight as it is a direct path between joint centers. The intramedullary generally follows the curvature of the femur, such that it is not straight as compared to mechanical axis.
- Cut guides can be used to guide a saw and achieve the proper angle and position of the cuts performed during a TKA. Cut guides can be in the form of a guide member having slots therein for receiving and guiding the saw. In use, the guide member can be positioned against the bone with the assistance of positioning or alignment equipment. The proper positioning of such guide members is crucial to forming well-positioned bone cuts for attachment of the prosthetic femoral and tibial implant components. For example, the tibial cut affects spacing, alignment and balance between the tibia and femur when the knee is in flexion, and alignment and balance between the tibia and femur when the knee is in extension, as well as all points of articulation between extension and flexion. Once properly positioned and aligned, the guide member can be secured to the bone using bone pins or other securement means. For example, the guide member can be slidably mounted to an alignment guide, which can be mounted at an angle relative to an extramedullary guide or intramedullary rod. For an extramedullary tibial resection, an extramedullary guide can be located relative to the patient's anatomy to provide proper alignment relative to the tibia, and a guide member can be positioned on the proximal end of the tibia. Similarly, in an intramedullary tibial resection, an intramedullary rod can be inserted into a pre-drilled hole in the intramedullary canal of the tibia to provide anatomic alignment with a cut guide positioned on the proximal end of the tibia. For preparation of the femoral resection, an intramedullary rod can be positioned such that it extends across the distal end of the femur, and the cut guide can be positioned on the proximal end of the femur. The cut guide can be slid toward or away (medially-laterally) from the tibia or femur until it is properly positioned against the surface of the bone. The cut guide can then be secured to the bone with pins. The cut guide can be connected to the alignment guide using a pin/hole connect mechanism.
- To better illustrate the bone cut positioning system and related methods disclosed herein, a non-limiting list of examples is provided here:
- In Example 1, a bone cut positioning system can comprise a positioning assembly, including a femoral attachment member configured to be fixed to a distal end of a femur and having a first tongue with at least one fixation aperture, a light emitter mounting member configured to receive a light emitter, a channel, a varus-valgus adjustment member configured to adjust a position of the positioning assembly relative to the femur to achieve a desired varus-valgus angle, a flexion-extension adjustment member configured to adjust a flexion-extension position of the positioning assembly relative to a flexion-extension of a knee joint, and a guide member configured to extend from a depth selector slide, the depth selector slide configured to be received within the channel of the positioning assembly.
- In Example 2, the bone cut positioning system of Example 1 is optionally configured such that the depth selector slide can be magnetically coupled to the channel.
- In Example 3, the bone cut positioning system of any one or any combination of Examples 1-2 is optionally configured such that the positioning assembly is manufactured from at least one biocompatible material.
- In Example 4, the bone cut positioning system of any one or any combination of Examples 1-3 is optionally configured such that the femoral attachment member includes a second tongue with at least one fixation aperture configured to receive a pin for securing the femoral attachment member to the distal end of the femur.
- In Example 5, the bone cut positioning system of any one or any combination of Examples 1-4 is optionally configured such that the light emitter mounting member includes a light emitter receiving aperture configured to receive at least a portion of the light emitter.
- In Example 6, the bone cut positioning system of any one or any combination of Examples 1-5 is optionally configured to include a magnetic interface for magnetically securing the light emitter to the light emitter mounting member.
- In Example 7, the bone cut positioning system of any one or any combination of Examples 1-6 is optionally configured such that the light emitter is configured to magnetically power on when received by the light emitter mounting member.
- In Example 8, the bone cut positioning system of any one or any combination of Examples 1-7 is optionally configured such that the light emitter includes a laser light emitter.
- In Example 9, the bone cut positioning system of any one or any combination of Examples 1-8 is optionally configured such that the guide member is a single-use, disposable device.
- In Example 10, the bone cut positioning system of any one or any combination of Examples 1-9 is optionally configured such that the positioning assembly is reusable.
- In Example 11, the bone cut positioning system of any one or any combination of Examples 1-10 is optionally configured to include a flexion-extension indicator.
- In Example 12, the bone cut positioning system of any one or any combination of Examples 1-11 is optionally configured such that the flexion-extension indicator includes a bubble level.
- In Example 13, the bone cut positioning system of any one or any combination of Examples 1-12 is optionally configured such that at least one of the varus-valgus and flexion-extension adjustment members is configured to receive an adjustment device.
- In Example 14, the bone cut positioning system of any one or any combination of Examples 1-13 is optionally configured such that the first tongue is configured to provide a reference on at least one of a medial and lateral side on an anterior cortex of the femur.
- In Example 15, a method for positioning a bone cut guide on a femur can comprise coupling a positioning assembly to a femur. The positioning assembly can include a femoral attachment member, including a tongue with at least one fixation aperture configured to receive a pin, a light emitter mounting member configured to receive a light emitter, a channel, a varus-valgus adjustment member configured to adjust a position of the positioning assembly relative to the femur to achieve a desired varus-valgus angle, and a flexion-extension adjustment member configured to adjust a flexion-extension position of the positioning assembly relative to a flexion-extension of a knee joint. The method can further include inserting a depth selector slide of a guide member into the channel, attaching the light emitter to the light emitter mounting member, wherein the light emitter indicates a varus-valgus angle of the femur, aligning the guide member relative to a distal end surface of the femur, coupling the guide member to the femur with at least one guide pin, removing the positioning assembly and the guide member from the femur, and sliding the bone cut guide over the at least one guide pin.
- In Example 16, the method of Example 15 is optionally configured to further include adjusting the varus-valgus adjustment member to align a position of the positioning assembly with the indicated varus-valgus angle of the femur.
- In Example 17, the method of any one or any combination of Examples 15-16 is optionally configure to further include adjusting the flexion-extension adjustment member to align a position of the positioning assembly with a flexion-extension angle of the knee joint.
- In Example 18, the method of any one or any combination of Examples 15-17 is optionally configured such that the method is performed on a leg in full extension.
- In Example 19, the method of any one or any combination of Examples 15-18 is optionally configured to further include adjusting the depth selector slide to a desired resection level.
- In Example 20, a bone cut positioning system can comprise a positioning assembly including a femoral attachment member configured to be coupled to a distal end of a femur, the femoral attachment member including a first tongue portion having at least one fixation aperture configured to receive a fastening member and a second tongue portion having at least one fixation aperture configured to receive a fastening member. The positioning assembly can further include a light emitter mounting member configured to receive a light emitter, a channel, a magnetic interface disposed within the channel, a varus-valgus adjustment member configured to adjust a position of the positioning assembly relative to the femur to achieve a desired varus-valgus angle, and a flexion-extension adjustment member configured to adjust a flexion-extension position of the positioning assembly relative to a flexion-extension of a knee joint. The bone cut positioning system can further include a guide member extending from a depth selector slide, where the depth selector slide is configured to be received within the channel of the positioning assembly and secured within the channel by the magnetic interface.
- In Example 21, the bone cut positioning system or method of any one or any combination of Examples 1-20 is optionally configured such that all elements or options recited are available to use or select from.
- These and other examples and features of the present disclosure can provide the benefit of reducing errors that can occur from intramedullary techniques, such as an error in varus-valgus alignment. That is, the present disclosure can provide a more accurate extramedullary technique. Further benefits of the present disclosure can include a system or method of resecting a femur such that the amount of bone cut from the femur is substantially minimized. Benefits of the present disclosure can also include providing a resected fixation surface that provides an improved or more secure fit for TKA prosthetics, as compared to previous approaches. Further, the present disclosure can provide a system and method for use in a TKA or partial knee replacement procedure while a leg is in extension. Benefits of such examples can include providing a better overall alignment analysis for a surgeon. Further, the system can include a more stable femoral attachment member better suited for procedures on a leg in extension. In addition, the present disclosure can provide an extramedullary system or method that is less invasive than an intramedullary technique, thereby reducing potential for infection and recovery time for a patient. Further, because the examples of the present disclosure provide extramedullary techniques that do not require intramedullary rod insertion, risk of systemic embolism is substantially reduced. Examples described in the present disclosure can be used when extra-articular deformities exist or when existing hardware, such as an extended hip stem, makes an intramedullary technique difficult.
- In the drawings, which are not necessarily drawn to scale, like numerals may describe similar components in different views. Like numerals having different letter suffixes may represent different instances of similar components. The drawings illustrate generally, by way of example, but not by way of limitation, various examples discussed in the present document.
-
FIG. 1 is a perspective view of a positioning assembly, in accordance with at least one example; -
FIG. 2 is a perspective view of the positioning assembly and an attached light emitter, in accordance with at least one example; -
FIG. 3 is a perspective view of the positioning assembly engaged with a femur, in accordance with at least one example; -
FIG. 4A is a top view of the positioning assembly and the lighter emitter engaged with the femur, in accordance with at least one example; -
FIG. 4B is an alternative top view of the positioning assembly and the light emitter engaged with the femur, in accordance with at least one example; -
FIG. 5 is an alternative perspective view of the bone cut positioning system and the light emitter engaged with the femur, in accordance with at least one example; -
FIG. 6 is a perspective view of a guide member, in accordance with at least one example; -
FIG. 7 is a perspective view of the positioning assembly and the guide member, which together form a bone cut positioning system, in accordance with at least one example; and -
FIG. 8 is a perspective view of a cut guide engaged with the femur, in accordance with at least one example. -
FIG. 9 is a method for positioning a cut guide on a femur, in accordance with at least one example. - The present disclosure describes a bone cut positioning system and related method of use. The bone cut positioning system and methods can be used in various examples to enhance or facilitate a total knee arthroplasty (TKA) procedure, a partial knee arthroplasty procedure, or any other suitable knee surgery procedure in which one or more cuts are made on a femur, such as a distal end of the femur. Generally, the examples described herein provide a means for positioning a bone cut on a femur. Although the following description focuses on TKA procedures, the described examples can also be used for partial knee arthroplasty procedures or other knee procedures in which femoral bone cuts are made.
-
FIG. 1 is a perspective view of apositioning assembly 10 in accordance with the present disclosure. One or more of the components of thepositioning assembly 10 can be made of a biocompatible material, such as a material that does not produce a toxic, injurious, or immunological response in living tissue. Biocompatible materials can include, but are not limited to, ceramics, synthetic polymeric materials, and metallic materials such as titanium, a titanium alloy, cobalt chromium, cobalt chromium molybdenum, tantalum, or a tantalum alloy. In various examples, thepositioning assembly 10 can be made of stainless steel. In various examples, thepositioning assembly 10 can be reusable, such as after sterilization. - As illustrated in
FIG. 1 , thepositioning assembly 10 can include afemoral attachment member 2 configured to be fixed to a distal end of a femur, a lightemitter mounting member 12, achannel 16 configured to receive a depth selector slide, and a varus-valgus adjustment member 20. - The
femoral attachment member 2 can include a first tongue 4 with at least one fixation aperture 6 configured to receive a pin or other fastening member. In various examples, the first tongue 4 can be configured such that it provides a reference on a medial or lateral side on an anterior cortex of the femur, when secured to the femur. The reference provided by the first tongue 4 can also be a flexion-extension axis reference. The first tongue 4 can include a substantiallyflat surface 5 configured to be secured to the anterior cortex of the femur. As illustrated inFIG. 1 , thefemoral attachment member 2 can include asecond tongue 7 with at least onefixation aperture 8 configured to receive a pin or other fastening member for securing thefemoral attachment member 2 to the distal end of the femur. In an example, the at least one fixation aperture can be oriented and positioned such that it provides a fixation point into the distal trochlea of the femur. The at least onefixation aperture 8 and corresponding pin or fastening member can be configured to provide stability to thepositioning assembly 10 such that an intramedullary rod is not necessary, therefor decreasing invasiveness of the procedure. - The light
emitter mounting member 12 can be configured to receive one or more light emitters. As illustrated inFIG. 1 , the lightemitter mounting member 12 can include a lightemitter receiving hole 14 configured to receive at least a portion of a light emitter. The lightemitter mounting member 14 can be disposed at any suitable position, such as above thefemoral attachment member 2 when thefemoral attachment member 2 is secured to the distal end of the femur. In an example, the lightemitter mounting member 14 is configured such that the light emitter, when mounted, is substantially centered medially and laterally on the femur and perpendicular to a cutting plane, as described herein. - As described above, the
channel 16 can be configured to receive a depth selector slide. In an example, thechannel 16 can include amagnetic interface 18 configured for magnetically securing the light emitter to the lightemitter mounting member 12. That is, in various examples, the depth selector slide, as described herein, can be magnetically coupled to thechannel 16. A guide member can also be provided that is configured to extend from the depth selector slide, as described in further detail below. - The varus-
valgus adjustment member 20 can be configured to adjust a position of thepositioning assembly 10 relative to the femur to achieve a desired varus-valgus angle. In an example, the varus-valgus adjustment member 20 can be a screw that is configured to receive an adjustment device. For example, an adjustment device can include a screw driver, an Allen wrench, or any other suitable device that is capable of turning the varus-valgus adjustment member 20. Thepositioning assembly 10 can further include a flexion-extension indicator 22 configured to indicate an angle of a knee joint. Additional details of the structure and operation of the varus-valgus adjustment member 20 are described below in connection withFIGS. 4A and 4B . -
FIG. 2 is an alternate perspective view of thepositioning assembly 10 including alight emitter 26. In various examples, thelight emitter 26 can be movable by a user, such that it can tilt relative to thepositioning assembly 10. Thelight emitter 26 can generally include a light source configured to emit a light beam, as described herein. A light source can include, for example, a light emitting diode, a laser, or a combination thereof. In various examples, thelight emitter 26 can emit a light beam in more than one direction, such as longitudinally along at least a portion of the femur and the tibia. Thelight emitter 26 can include alight emitter protrusion 13 configured to be received by light emitter receiving hole 14 (seeFIG. 1 ) of the lightemitter mounting member 12. The engagement between thelight emitter 26 and the lightemitter mounting member 12 can be configured to allow tilting of thelight emitter 26 by the user to allow adjustment of the light beam along the femur and/or the tibia. Although the lightemitter receiving hole 14 is shown as cylindrical inFIG. 1 , it can be any three-dimensional geometric shape capable receiving thelight emitter protrusion 13. Thus, the lightemitter receiving hole 14 and thelight emitter protrusion 13 can be defined by a similar three-dimensional shape, or non-similar three-dimensional shapes that allow for engagement between thelight emitter protrusion 13 and the lightemitter receiving hole 14. Alternatively, thelight emitter 26 can be fixed, such as an integral assembly, with thepositioning assembly 10. - The
light emitter 26 can be configured to emit a light upon being coupled to the lightemitter mounting member 12. For example, thelighter emitter 26 can include a magnetic switch that activates or powers on the light source upon being coupled to the lightemitter mounting member 12. Alternatively or in addition, thelight emitter 26 can include a manual on/off switch. For example, thelight emitter 26 can include a switch that can be activated when exposed to the magnetic force of the lightemitter mounting member 12. Additionally or alternatively, the light emitter can include a switch operable by a user to activate the light source. - As further illustrated in
FIG. 2 , thepositioning assembly 10 can include a flexion-extension adjustment member 24. The flexion-extension adjustment member 24 can be configured to adjust thepositioning assembly 10 to achieve a desired flexion-extension of a knee joint, as described herein. -
FIG. 3 is a perspective view of thepositioning assembly 10 engaged with afemur 30. As shown, apin 28 inserted into the distal trochlea of thefemur 30 can provide stability for thepositioning assembly 10.Pins 28 can also be positioned within the fixation apertures 6 of the first tongue 4 to secure thefemoral attachment member 2 to thefemur 30. -
FIG. 4A is an alternate perspective view of thepositioning assembly 10 engaged with thefemur 30. With reference toFIG. 4A , the varus-valgus adjustment member 20 can adjust a position of thepositioning assembly 10 relative to a varus-valgus angle or line of thefemur 30 or thetibia 32. The varus-valgus adjustment member 20 can be operable to adjust a position of the lightemitter mounting member 12 without adjusting a position of thefemoral attachment member 2. Thus, adjusting the varus-valgus adjustment member 20 can rotate one or more components of thepositioning assembly 10 in a direction A. In an example, the varus-valgus adjustment member 20 can be configured to rotate the lightemitter mounting member 12 orlight emitter 26 clockwise or counter clockwise relative to thefemoral attachment member 2. - As shown in
FIG. 4B , thelight emitter 26 can extend thelight beam 34 longitudinally along at least a portion of thefemur 30, thetibia 32, or both thefemur 30 and thetibia 32. More specifically, thelight emitter 26 can direct thelight beam 34 toward a surface of thefemur 30 or thetibia 32 for guiding orientation or adjustment of thepositioning assembly 10. In various examples, the beam of light 34 can include a plane, a fan, a cross, or any other suitable light configuration. When the varus-valgus adjustment member 20 is adjusted, the beam of light 34 can be adjusted in the same direction A as thepositioning assembly 10 or the lightemitter mounting member 12, when the position of the lightemitter mounting member 12 is adjusted independently of and relative to thefemoral attachment member 2. Thelight beam 34 can be adjusted in the direction A until a desired varus-valgus alignment between the varus-valgus line of thefemur 30 and/ortibia 32 and thepositioning assembly 10 is achieved. -
FIG. 5 illustrates another perspective view of thepositioning assembly 10 mounted on thefemur 30. With reference toFIG. 5 , the flexion-extension adjustment member 24 can adjust thepositioning assembly 10 in a direction B. The flexion-extension indicator 22 can indicate a desired flexion-extension alignment of thepositioning assembly 10 as selected by a user through adjustment of the flexion-extension adjustment member 24. The flexion-extension indicator 22 can include any suitable type of level indicator, such as a ball level indicator, a bubble level indicator, or a digital inclinometer. In operation, the user can manipulate the flexion-extension adjustment member 24 until a desired flexion-extension angle has been achieved as visually displayed by the flexion-extension indicator 22. In various examples, the desired flexion-extension angle can be between 0 degrees and about 5 degrees flexion, although other ranges are also contemplated. The flexion-extension adjustment member 24 can be adjusted when the leg is in full-extension, such as when compression is applied to the leg, or when the leg is in partial flexion. -
FIG. 6 is a perspective view of aguide member 36, such as a pin guide. As illustrated inFIG. 6 , theguide member 36 can include adepth selector slide 38. Thedepth selector slide 38 can include amagnetic interface 39 configured to magnetically interact with the magnetic interface 18 (seeFIG. 1 ) of the channel 16 (seeFIG. 1 ). The depth selector slidemagnetic interface 39 can be configured to contact or be positioned sufficiently close to themagnetic interface 18 of thechannel 16 such that thedepth selector slide 38 can be retained within thechannel 16. The magnetic force between themagnetic interface 39 of thedepth selector slide 38 and themagnetic interface 18 of thechannel 16 can be strong enough to temporarily fix thedepth selector slide 38 within thechannel 16, but weak enough such that a user can reposition remove thedepth selector slide 38 from thepositioning assembly 10 by pushing, pulling, or lifting thedepth selector slide 38. In various examples, theguide member 36 can include one ormore apertures 40 configured to receive a pin or other fastening member for securing theguide member 36 to the femur. - The
guide member 36 can include afemoral contact surface 44 configured to contact a surface of the distal femur, such as a condyle of the femur. In an example, thefemoral contact surface 44 can be configured to contact a high point of the distal femur such that a resection depth between about 1 mm and about 20 mm can be determined. After making contact with the desired portion of the femur, theguide member 36 can be secured to the femur by inserting one or more pins or other fastening members through the one ormore apertures 40. -
FIG. 7 is a perspective view of theguide member 36 coupled to thepositioning assembly 10, which together form a bonecut positioning system 11. As discussed above with reference toFIG. 3 , pins 28 can be inserted through the first tongue 4 and thesecond tongue 7 to secure thefemoral attachment member 2 to thefemur 30. As illustrated inFIG. 7 , pins 46 can also be inserted through theapertures 40 in theguide member 36 to secure theguide member 36 to thefemur 30. -
FIG. 8 is a perspective view of acut guide 48 mounted on thefemur 30 after the bone cutpositioning system 11 has been removed from thefemur 30. In the example previously described, the bone cutpositioning system 11 can be decoupled from thefemur 30 by removing thepins 28. After removing thepins 28 the bone cutpositioning system 10 can be slid off thefemur 30 leaving only thepins 46 engaged with thefemur 30. The cut guide 48 can be slid over thepins 46 by inserting thepins 46 within one or more apertures 47 formed in thecut guide 48. The cut guide 48 can include one or more cutting surfaces 50, one ormore cutting slots 51, or a combination of such elements. With reference toFIG. 8 , the cuttingsurface 50 and the cuttingslots 51 can be configured for guiding a saw or other cutting instrument. In an example, at least one of the cuttingsurface 50 and the cutting slots 52 can be oriented along a plane that is substantially perpendicular to thelight beam 34 ofFIG. 4B . - The cut guide 48 can be a single-use, disposable device manufactured from a biocompatible material, as described herein. As illustrated in
FIG. 8 , at least a portion of the biocompatible material forming thecut guide 48 can be a resorbable material, such as aportion 49 of thecut guide 48 that includes the cuttingsurface 50 and the cuttingslots 51. A resorbable material can include a material capable of being absorbed into tissue of a human subject upon separation of the material from theguide member 48. For example, the resorbable material can include a poly-L-lactide, a poly-D-lactide, a poly-DL-lactide, a ployglycolide, a polycaprolactone, or a combination thereof In an example, theresorbable material portion 49 of thecut guide 48 can be removable or replaceable, such that theguide member 48 can be reused after sterilization and replacement of theportion 49. -
FIG. 9 is a method 80 for positioning a bone cut guide on a femur. The method 80 can include coupling 82 a positioning assembly to a femur, including inserting at least one pin or other fastening member into a distal trochlea of the femur. The positioning assembly can include a femoral attachment member including a tongue with at least one fixation aperture configured to receive a pin or other fastening member, a light emitter mounting member configured to receive a light emitter, a channel configured to receive a depth selector slide, a varus-valgus adjustment member configured to adjust a position of the positioning assembly relative to the femur to achieve a desired varus-valgus angle, a flexion-extension adjustment member configured to adjust a flexion-extension position of the positioning assembly relative to a flexion-extension of a knee joint, and a guide member configured to extend from the depth selector slide. - The method 80 can further include attaching 84 the light emitter to the light emitter mounting member. Attaching the light emitter to the light emitter mounting member can further include activating a light source, such as magnetically or by an on/off switch. Upon activation, the light emitter can be configured to indicate a varus-valgus angle of the femur.
- In various examples, the method 80 can include sliding 86 a guide member, extending from the depth selector slide, into the channel of the positioning assembly. A magnetic interface can be formed between the channel and the depth selector slide, as described herein. The method 80 can include aligning 88 the guide member relative to a high point of a distal end of the femur, including touching a contact surface of the guide member with a high point of the distal femur, as described herein. Aligning 88 can further include adjusting the depth selector slide to a desired resection level.
- The method 80 can further include
coupling 90 the guide member to the femur with at least one guide pin or other fastening member. Further, the method 80 can include removing 92 the positioning assembly and the guide member from the femur, and sliding 94 a cut guide over the at least one guide pin. - In various examples, the method 80 can further include adjusting the varus-valgus adjustment member to align the positioning assembly with a desired varus-valgus angle of the femur, such as prior to mounting the guide member. For example, a light beam emitted by the light emitter can be aligned with a varus-valgus line of the femur and/or tibia. Further, the method can include adjusting the flexion-extension adjustment member to align the positioning assembly with a flexion-extension angle of the knee joint. Adjusting the flexion-extension adjustment member can include adjusting the flexion-extension member until a flexion-extension indicator indicates the positioning assembly is substantially level. The method 80 can be performed on the leg in full extension, such as with applied compression, or when the leg is in partial flexion.
- 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 in which the invention can be practiced. These examples are also referred to herein as “examples.” Such examples can include elements in addition to those shown or described. However, the present inventor also contemplates examples in which only those elements shown or described are provided. Moreover, the present inventor also contemplates 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.
- In the event of inconsistent usages between this document and any documents so incorporated by reference, the usage in this document controls.
- 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 this document, 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, composition, formulation, 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.
- The above Detailed 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 can be used, such as by one of ordinary skill in the art upon reviewing the above Detailed Description. 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 example. Thus, the following claims are hereby incorporated into the Detailed Description as examples or examples, with each claim standing on its own as a separate example, and it is contemplated that such examples can be combined with each other in various combinations or permutations. The scope of the invention should be determined with reference to the appended claims, along with the full scope of equivalents to which such claims are entitled.
- The Abstract is provided to comply with 37 C.F.R. §1.72(b), to allow the reader to quickly ascertain the nature of the technical disclosure. It is submitted with the understanding that it will not be used to interpret or limit the scope or meaning of the claims.
Claims (21)
1-20. (canceled)
21. A bone cut positioning system, comprising:
a femoral attachment member including a base portion and a first tongue with at least one fixation aperture, the first tongue extending away from the base portion and configured to be attached to the anterior cortex of a femur, thereby providing a reference on at least one of a medial and lateral side on the anterior cortex of the femur;
a light emitter mounting member configured to receive a light emitter;
a varus-valgus adjustment member configured to adjust a position of the positioning assembly relative to the femur to a target varus-valgus angle; and
a flexion-extension adjustment member configured to adjust a flexion-extension position of the positioning assembly;
a channel;
a guide member comprising:
at least one femoral contact surface; and
a depth selector slide, the depth selector slide configured to be received and move within the channel to move the guide member proximally-distally relative to the femur to cause the at least one femoral contact surface to engage the distal end of the femur to set a resection depth.
22. The bone cut positioning system of claim 21 , wherein the depth selector slide is configured to be magnetically coupled to the channel.
23. The bone cut positioning system of claim 21 , wherein the positioning assembly is manufactured from at least one biocompatible material.
24. The bone cut positioning system of claim 21 , wherein the femoral attachment member includes a second tongue with at least one fixation aperture configured to receive a pin for securing the femoral attachment member to the anterior cortex of the femur proximal to the distal end of the femur.
25. The bone cut positioning system of claim 21 , wherein the light emitter mounting member includes a light emitter receiving aperture configured to receive at least a portion of the light emitter.
26. The bone cut positioning system of claim 25 , further including a magnetic interface for magnetically securing the light emitter to the light emitter mounting member.
27. The bone cut positioning system of claim 26 , wherein the light emitter is configured to magnetically power on when received by the light emitter mounting member.
28. The bone cut positioning system of claim 21 , wherein the light emitter includes a laser light emitter.
29. The bone cut positioning system of claim 21 , wherein the guide member is a single-use, disposable device.
30. The bone cut positioning system of claim 21 , wherein the positioning assembly is reusable.
31. The bone cut positioning system of claim 21 , further including a flexion-extension indicator.
32. The bone cut positioning system of claim 31 , wherein the flexion-extension indicator includes a bubble level.
33. The bone cut positioning system of claim 21 , wherein at least one of the varus-valgus and flexion-extension adjustment members is configured to receive an adjustment device.
34. A bone cut positioning system, comprising:
a femoral attachment member including a first tongue configured to be attached to the anterior cortex of a femur and a second tongue configured to be attached to the distal end of the femur;
a varus-valgus adjustment member configured to adjust a position of the positioning assembly relative to the femur to a target varus-valgus angle; and
a flexion-extension adjustment member configured to adjust a flexion-extension position of the positioning assembly; and
a channel;
a guide member comprising:
at least one femoral contact surface;
a depth selector slide, the depth selector slide received and movable within the channel to move the guide member proximally-distally relative to the femur to cause the at least one femoral contact surface to engage the distal end of the femur to set a desired resection level; and
at least two apertures, the at least two apertures configured to receive at least two guide pins configured to be attached to the femur and thereafter to receive and locate a cut guide relative to the femur after the positioning assembly including the guide member has been removed from the femur.
35. The bone cut positioning system of claim 34 , further comprising the at least two guide pins received by the at least two apertures and configured to be attached to the femur and thereafter to receive and locate a cut guide relative to the femur after the positioning assembly including the guide member has been removed from the femur.
36. The bone cut positioning system of claim 34 , further comprising a light emitter mounting member configured to receive a light emitter.
37. The bone cut positioning system of claim 36 , wherein the light emitter mounting member includes a light emitter receiving aperture configured to receive at least a portion of the light emitter.
38. The bone cut positioning system of claim 37 , further including a magnetic interface for magnetically securing the light emitter to the light emitter mounting member, and wherein the light emitter is configured to magnetically power on when received by the light emitter mounting member.
39. A bone cut system, comprising:
a cut guide; and
a positioning assembly comprising:
a femoral attachment member including a first tongue configured to be attached to the anterior cortex of a femur and a second tongue configured to be attached to the distal end of the femur;
a varus-valgus adjustment member configured to adjust a position of the positioning assembly relative to the femur to a target varus-valgus angle; and
a flexion-extension adjustment member configured to adjust a flexion-extension position of the positioning assembly; and
a channel;
a guide member comprising:
at least one femoral contact surface;
a depth selector slide, the depth selector slide received and movable within the channel to move the guide member proximally-distally relative to the femur to cause the at least one femoral contact surface to engage the distal end of the femur to set a desired resection level; and
at least two apertures, the at least two apertures configured to receive at least two guide pins configured to be attached to the femur and thereafter to receive and locate the cut guide relative to the femur after the positioning assembly including the guide member has been removed from the femur.
40. The bone cut positioning system of claim 36 , further comprising the at least two guide pins received by the at least two apertures and configured to be attached to the femur and thereafter to receive and locate a cut guide relative to the femur after the positioning assembly including the guide member has been removed from the femur.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US15/388,609 US20170100133A1 (en) | 2013-03-07 | 2016-12-22 | Extramedullary resection guide and methods |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US13/789,049 US9955979B2 (en) | 2013-03-07 | 2013-03-07 | Extramedullary resection guide and methods |
US15/388,609 US20170100133A1 (en) | 2013-03-07 | 2016-12-22 | Extramedullary resection guide and methods |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US13/789,049 Continuation US9955979B2 (en) | 2013-03-07 | 2013-03-07 | Extramedullary resection guide and methods |
Publications (1)
Publication Number | Publication Date |
---|---|
US20170100133A1 true US20170100133A1 (en) | 2017-04-13 |
Family
ID=50382559
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US13/789,049 Active 2035-09-01 US9955979B2 (en) | 2013-03-07 | 2013-03-07 | Extramedullary resection guide and methods |
US15/388,609 Abandoned US20170100133A1 (en) | 2013-03-07 | 2016-12-22 | Extramedullary resection guide and methods |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US13/789,049 Active 2035-09-01 US9955979B2 (en) | 2013-03-07 | 2013-03-07 | Extramedullary resection guide and methods |
Country Status (3)
Country | Link |
---|---|
US (2) | US9955979B2 (en) |
EP (1) | EP2964110B1 (en) |
WO (1) | WO2014137726A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9955979B2 (en) | 2013-03-07 | 2018-05-01 | Zimmer, Inc. | Extramedullary resection guide and methods |
US10004516B2 (en) | 2013-03-07 | 2018-06-26 | Zimmer, Inc. | Intramedullary resection guide and methods |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2016137059A (en) * | 2015-01-27 | 2016-08-04 | 京セラメディカル株式会社 | Measuring instrument for surgery |
DE102017127737A1 (en) * | 2017-11-23 | 2019-05-23 | Aesculap Ag | Surgical instruments |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20080195109A1 (en) * | 2007-02-13 | 2008-08-14 | Hunter Mark W | Navigated cut guide for total knee reconstruction |
US20090234360A1 (en) * | 2006-12-12 | 2009-09-17 | Vladimir Alexander | Laser assisted total joint arthroplasty |
US20100063508A1 (en) * | 2008-07-24 | 2010-03-11 | OrthAlign, Inc. | Systems and methods for joint replacement |
Family Cites Families (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7309339B2 (en) | 2003-02-04 | 2007-12-18 | Howmedica Osteonics Corp. | Apparatus for aligning an instrument during a surgical procedure |
US20050070897A1 (en) | 2003-09-29 | 2005-03-31 | Petersen Thomas D. | Laser triangulation of the femoral head for total knee arthroplasty alignment instruments and surgical method |
US8021368B2 (en) | 2004-01-14 | 2011-09-20 | Hudson Surgical Design, Inc. | Methods and apparatus for improved cutting tools for resection |
US20070073306A1 (en) | 2004-03-08 | 2007-03-29 | Ryan Lakin | Cutting block for surgical navigation |
US7338189B2 (en) | 2004-08-10 | 2008-03-04 | Alert Safety Lite Products Co., Inc. | LED utility light with removable magnet |
US8979853B2 (en) * | 2005-02-17 | 2015-03-17 | Lucas Anissian | Method and system for determining resection guidelines for joint replacement surgical procedures |
US7618420B2 (en) | 2005-02-17 | 2009-11-17 | Howmedica Osteonics Corp. | Locking intramedullary jig |
US8740910B2 (en) | 2006-01-12 | 2014-06-03 | Howmedica Osteonics Corp. | Modular anterior-posterior femoral sizer |
US7726974B2 (en) | 2008-03-20 | 2010-06-01 | Illumitron International | Magnetic power and data coupling for LED lighting |
US20100198275A1 (en) | 2008-10-30 | 2010-08-05 | Synvavise Technology, Inc. | Force sensing distal femoral alignment system and method of use |
US9095352B2 (en) | 2009-11-02 | 2015-08-04 | Synvasive Technology, Inc. | Bone positioning device and method |
EP2525740A4 (en) * | 2010-01-21 | 2016-01-20 | Orthalign Inc | Systems and methods for joint replacement |
US8436521B2 (en) | 2011-03-21 | 2013-05-07 | Henry Hyunbo Shim | Lamp device with magnetic socket |
WO2012176077A1 (en) | 2011-06-24 | 2012-12-27 | Stryker Global Technology Center | Anatomically matched patient alignment blocks |
US9955979B2 (en) | 2013-03-07 | 2018-05-01 | Zimmer, Inc. | Extramedullary resection guide and methods |
US10004516B2 (en) | 2013-03-07 | 2018-06-26 | Zimmer, Inc. | Intramedullary resection guide and methods |
WO2015100766A1 (en) | 2014-01-06 | 2015-07-09 | Lin Lapwah | Led lighting fixture with heat sink casing |
-
2013
- 2013-03-07 US US13/789,049 patent/US9955979B2/en active Active
-
2014
- 2014-02-27 EP EP14712819.3A patent/EP2964110B1/en active Active
- 2014-02-27 WO PCT/US2014/018900 patent/WO2014137726A1/en active Application Filing
-
2016
- 2016-12-22 US US15/388,609 patent/US20170100133A1/en not_active Abandoned
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20090234360A1 (en) * | 2006-12-12 | 2009-09-17 | Vladimir Alexander | Laser assisted total joint arthroplasty |
US20080195109A1 (en) * | 2007-02-13 | 2008-08-14 | Hunter Mark W | Navigated cut guide for total knee reconstruction |
US20100063508A1 (en) * | 2008-07-24 | 2010-03-11 | OrthAlign, Inc. | Systems and methods for joint replacement |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9955979B2 (en) | 2013-03-07 | 2018-05-01 | Zimmer, Inc. | Extramedullary resection guide and methods |
US10004516B2 (en) | 2013-03-07 | 2018-06-26 | Zimmer, Inc. | Intramedullary resection guide and methods |
Also Published As
Publication number | Publication date |
---|---|
EP2964110B1 (en) | 2016-12-28 |
WO2014137726A1 (en) | 2014-09-12 |
US20140257307A1 (en) | 2014-09-11 |
EP2964110A1 (en) | 2016-01-13 |
US9955979B2 (en) | 2018-05-01 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US10004516B2 (en) | Intramedullary resection guide and methods | |
EP2665428B1 (en) | Knee arthroplasty apparatus | |
US20190239897A1 (en) | Distal femoral jig assembly | |
US5578037A (en) | Surgical guide for femoral resection | |
US8273131B2 (en) | Method and apparatus for positioning a multiple piece prosthesis | |
US7309339B2 (en) | Apparatus for aligning an instrument during a surgical procedure | |
EP1669033B1 (en) | Device for positioning a bone cutting guide | |
AU2002355356B2 (en) | Tibial resection guide | |
EP2166969B1 (en) | Universal positioning device for orthopedic surgery | |
US20060015115A1 (en) | Methods and apparatus for pivotable guide surfaces for arthroplasty | |
US8128630B2 (en) | Tibial augmentation guide | |
US20050187560A1 (en) | Apparatus and method for sizing a distal femur | |
WO2013119865A1 (en) | Joint arthroplasty devices, systems, and methods | |
US20170100133A1 (en) | Extramedullary resection guide and methods | |
EP2273922A1 (en) | Navigation tracker fixation device and method for use thereof | |
AU2019397526A1 (en) | Alignment instruments and methods for use in total ankle replacement | |
US20220183857A1 (en) | Positioning device of a surgical instrument for hip arthroplasty surgery | |
RU2766758C2 (en) | Orthopedic surgical instrument | |
CN116849757A (en) | Femur distal bone interception extra-bone marrow positioning device for knee joint replacement | |
Benabdeslam et al. | Interest Of Navigation Surgery In Total Knee Arthroplasty |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |