Patents by Inventor Stuart L. Axelson
Stuart L. Axelson has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 10182828Abstract: A bone resection guide, which includes a profiling guide. The profiling guide includes a first planar bone contact surface, a first guide surface and at least one outline corresponding to at least a portion of a first implant.Type: GrantFiled: November 8, 2013Date of Patent: January 22, 2019Assignee: Stryker CorporationInventors: Stuart L. Axelson, Jr., Michael A. McGovern, Rahul Ramachandran
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Patent number: 10098747Abstract: Disclosed herein are knee replacement systems for replacing the articular surface of a distal femur. The systems include one or more unicompartmental components, namely patellofemoral, lateral condylar and medial condylar components. The components are configured such that when engaged to the femur the peripheries thereof do not cross specific locations and/or regions of the femur, namely the intercondylar notch and condylopatellar notch. The patellofemoral components described herein preferably have an extension portion extending posteriorly from a posterior periphery thereof towards an intercondylar notch of the femur without contacting the intercondylar notch of the femur when the patellofemoral component is engaged to the femur. The extension portion preferably extends posteriorly from a posterior periphery of the patellofemoral component towards the condylopatellar notch of the femur without contacting the notch.Type: GrantFiled: March 9, 2017Date of Patent: October 16, 2018Assignee: Stryker CorporationInventors: Peter Wellings, Michael C. Ferko, Stuart L. Axelson, Jr.
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Publication number: 20180263640Abstract: Disclosed herein are systems and methods for performing total hip arthroplasty with patient-specific guides. Pre-operative images of a pelvic region of a patient are taken in order to predefine the structure of the guides and corresponding implants. From the obtained image data an insertional vector for implanting an acetabular implant or component into an acetabulum of the patient is determined, wherein the insertional vector is coaxial with a polar axis of the acetabular component. Also from the obtained image data, a superior surface of the guides and implants can be shaped to match the acetabulum of the patient. A nub portion extending outwardly from the superior surface of the guides and implants is shaped to substantially match the shape of a fovea of the acetabulum. A guide portion of the guides forming a slot has a longitudinal axis coaxial with the determined insertional vector of a corresponding acetabular component.Type: ApplicationFiled: May 18, 2018Publication date: September 20, 2018Inventors: James V. Bono, Stuart L. Axelson, JR., Adam Bastian
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Publication number: 20180235763Abstract: Hip implant systems described herein can include a distal stem, a proximal body, and a fastener. In some embodiments, the distal stem can include a cavity configured to receive the fastener when a portion of the distal stem is positioned within the proximal body. In some embodiments, the distal stem can include a threaded exterior surface configured to mate with a fastener when a portion of the distal stem is positioned within the proximal body. In some embodiments, a distal end of the distal stem can include an anterior relief configured to conform to interior surface of a femoral canal of a patient.Type: ApplicationFiled: February 21, 2018Publication date: August 23, 2018Inventors: R. Michael Meneghini, Scott Sporer, Michael Taunton, James Andrew Browne, Raymond Kim, Paul K. Edwards, Michael Mason, Joseph Jankiewicz, Mark McBride, Stuart L. Axelson, JR., Adam Shallenberg
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Publication number: 20180200072Abstract: Disclosed herein are systems and methods for bone preparation with designed areas having accurate tolerance profiles to enable improved initial fixation and stability for cementless implants and to improve long-term bone ingrowth/ongrowth to an implant. A method of preparing a bone surface to receive a prosthetic implant thereon having an articular surface and a bone contacting surface includes resecting the bone surface at a first location to create a first resected region having a first tolerance profile with a first cross-section, resecting the bone surface at a second location to create a second resected region having a second tolerance profile with a second cross-section less dense than the first cross-section, and contacting the bone contacting surface of the prosthetic implant with the first resected region.Type: ApplicationFiled: March 12, 2018Publication date: July 19, 2018Inventors: Stuart L. Axelson, JR., Donald W. Malackowski, John Michael Stuart
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Publication number: 20180200067Abstract: A shoulder implant system includes a humeral stem implant, a humeral neck implant component, a humeral head implant component, and a glenoid implant. The humeral stem implant has a fin coupled to an exterior surface thereof that is inwardly tapered at an angle relative to vertical. At least a portion of the fin forms a wedge that directly engages and compacts cancellous bone during installation of the humeral stem implant. The humeral neck implant component is configured to be coupled with the humeral stem implant. The humeral head implant component is configured to be coupled to the humeral stem implant via the humeral neck implant component. The glenoid implant has a plurality of peripheral pegs. Each of the peripheral pegs has a plurality of sets of resilient lobes.Type: ApplicationFiled: January 18, 2018Publication date: July 19, 2018Inventors: Stuart L. Axelson, JR., Andrew M. Dickson, Kirstin Widding, Joseph Albert Abboud, Surena Namdari, Mark Alan Frankle, Jonathan C. Levy, Gerald Ross Williams, Jr., Nathan Oliver Plowman, Richard Justin Hyer
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Patent number: 9999429Abstract: Disclosed herein are systems and methods for performing total hip arthroplasty with patient-specific guides. Pre-operative images of a pelvic region of a patient are taken in order to predefine the structure of the guides and corresponding implants. From the obtained image data an insertional vector for implanting an acetabular implant or component into an acetabulum of the patient is determined, wherein the insertional vector is coaxial with a polar axis of the acetabular component. Also from the obtained image data, a superior surface of the guides and implants can be shaped to match the acetabulum of the patient. A nub portion extending outwardly from the superior surface of the guides and implants is shaped to substantially match the shape of a fovea of the acetabulum. A guide portion of the guides forming a slot has a longitudinal axis coaxial with the determined insertional vector of a corresponding acetabular component.Type: GrantFiled: June 28, 2017Date of Patent: June 19, 2018Assignee: Howmedica Osteonics Corp.Inventors: James V. Bono, Stuart L. Axelson, Jr., Adam Bastian
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Patent number: 9937058Abstract: A prosthetic implant useful in a cementless application is disclosed. The implant may include a curved bone facing surface and one or more pegs or keels. Preferably, the implant is implanted on a bone surface that has been prepared so as to allow for a snap fit between the implant and the bone.Type: GrantFiled: May 24, 2016Date of Patent: April 10, 2018Assignee: Stryker CorporationInventors: Stuart L. Axelson, Jr., Michael C. Ferko, Peter John Wellings
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Patent number: 9937059Abstract: Disclosed herein are systems and methods for bone preparation with designed areas having accurate tolerance profiles to enable improved initial fixation and stability for cementless implants and to improve long-term bone ingrowth/ongrowth to an implant. A method of preparing a bone surface to receive a prosthetic implant thereon having an articular surface and a bone contacting surface includes resecting the bone surface at a first location to create a first resected region having a first tolerance profile with a first cross-section, resecting the bone surface at a second location to create a second resected region having a second tolerance profile with a second cross-section less dense than the first cross-section, and contacting the bone contacting surface of the prosthetic implant with the first resected region.Type: GrantFiled: December 5, 2016Date of Patent: April 10, 2018Assignee: Stryker CorporationInventors: Stuart L. Axelson, Jr., Donald W. Malackowski, John Michael Stuart
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Patent number: 9855057Abstract: A method for aligning an orthopedic implant in a joint replacement includes determining the bone and cartilage deficiency from an undegenerated state caused by wear of a joint. Then a resection of a bone in the joint is made based on the deficiency of bone and cartilage from the undegenerated state and the size of a joint implant so as to locate the joint surface of the implant in the undegenerated cartilage location. The condylar wear from the undegenerated states may be assessed at a distal and posterior location on each of a medial and a lateral femoral condyle. A distal cut is made on the femur at a location adjusting for the condylar wear from the undegenerated state. The distal cut varus-valgus angle is oriented parallel to a plane across the distal femur after adjusting for wear in the distal location on the medial and lateral condyle.Type: GrantFiled: June 23, 2015Date of Patent: January 2, 2018Assignee: Howmedica Osteonics Corp.Inventors: Stuart L. Axelson, Jr., Mohamed Soliman, Michael C. Ferko, Robert Frederick Simes, Jr., James H. Howell
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Patent number: 9795397Abstract: A system for replacing a trochlear groove region of a femur. The system includes a prosthesis that includes a bone contact surface and a periphery that defines an outer perimeter. The bone contact surface has a plurality of protrusions and a spatial configuration with respect to one another. Additionally, the system includes a first template that has a plurality of guide holes and a first periphery that defines an outer perimeter that substantially corresponds with the periphery of the prosthesis. Also, included in the system is a second template that has a plurality of guide holes and a second periphery that defines an outer perimeter that substantially corresponds with the periphery of the prosthesis. The plurality of guide holes of the second template are spatially arranged with respect to the second periphery to substantially match the spatial configuration of the plurality of protrusions of the prosthesis.Type: GrantFiled: April 25, 2016Date of Patent: October 24, 2017Assignee: Stryker CorporationInventors: Carlos E. Collazo, Stuart L. Axelson, Jr., Michael C. Ferko, Emily Hampp
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Publication number: 20170296206Abstract: Disclosed herein are systems and methods for performing total hip arthroplasty with patient-specific guides. Pre-operative images of a pelvic region of a patient are taken in order to predefine the structure of the guides and corresponding implants. From the obtained image data an insertional vector for implanting an acetabular implant or component into an acetabulum of the patient is determined, wherein the insertional vector is coaxial with a polar axis of the acetabular component. Also from the obtained image data, a superior surface of the guides and implants can be shaped to match the acetabulum of the patient. A nub portion extending outwardly from the superior surface of the guides and implants is shaped to substantially match the shape of a fovea of the acetabulum. A guide portion of the guides forming a slot has a longitudinal axis coaxial with the determined insertional vector of a corresponding acetabular component.Type: ApplicationFiled: June 28, 2017Publication date: October 19, 2017Inventors: James V. Bono, Stuart L. Axelson, JR., Adam Bastian
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Patent number: 9782261Abstract: A method for replacing a joint surface, which includes resecting a first portion of the joint surface to create a wall surface and inner resected surface. The wall surface (2006) separates the inner resected surface and a non-resected portion of the joint surface. Further included in the method is cutting a concave groove having a first radius into the wall surface, and engaging the concave groove with a periphery of a joint prosthesis. The periphery includes a second radius that is substantially the same as the first radius of the concave groove.Type: GrantFiled: February 25, 2014Date of Patent: October 10, 2017Assignee: Stryker CorporationInventors: Carlos E. Collazo, Stuart L. Axelson, Jr., Michael C. Ferko, Emily Hampp
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Patent number: 9717509Abstract: Disclosed herein are systems and methods for performing total hip arthroplasty with patient-specific guides. Pre-operative images of a pelvic region of a patient are taken in order to predefine the structure of the guides and corresponding implants. From the obtained image data an insertional vector for implanting an acetabular implant or component into an acetabulum of the patient is determined, wherein the insertional vector is coaxial with a polar axis of the acetabular component. Also from the obtained image data, a superior surface of the guides and implants can be shaped to match the acetabulum of the patient. A nub portion extending outwardly from the superior surface of the guides and implants is shaped to substantially match the shape of a fovea of the acetabulum. A guide portion of the guides forming a slot has a longitudinal axis coaxial with the determined insertional vector of a corresponding acetabular component.Type: GrantFiled: September 27, 2016Date of Patent: August 1, 2017Assignee: Howmedica Osteonics Corp.Inventors: James V. Bono, Stuart L. Axelson, Jr., Adam Bastian
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Publication number: 20170172749Abstract: Disclosed herein are knee replacement systems for replacing the articular surface of a distal femur. The systems include one or more unicompartmental components, namely patellofemoral, lateral condylar and medial condylar components. The components are configured such that when engaged to the femur the peripheries thereof do not cross specific locations and/or regions of the femur, namely the intercondylar notch and condylopatellar notch. The patellofemoral components described herein preferably have an extension portion extending posteriorly from a posterior periphery thereof towards an intercondylar notch of the femur without contacting the intercondylar notch of the femur when the patellofemoral component is engaged to the femur. The extension portion preferably extends posteriorly from a posterior periphery of the patellofemoral component towards the condylopatellar notch of the femur without contacting the notch.Type: ApplicationFiled: March 9, 2017Publication date: June 22, 2017Inventors: Peter Wellings, Michael C. Ferko, Stuart L. Axelson, JR.
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Publication number: 20170151067Abstract: Disclosed herein are systems and methods for bone preparation with designed areas having accurate tolerance profiles to enable improved initial fixation and stability for cementless implants and to improve long-term bone ingrowth/ongrowth to an implant. A method of preparing a bone surface to receive a prosthetic implant thereon having an articular surface and a bone contacting surface includes resecting the bone surface at a first location to create a first resected region having a first tolerance profile with a first cross-section, resecting the bone surface at a second location to create a second resected region having a second tolerance profile with a second cross-section less dense than the first cross-section, and contacting the bone contacting surface of the prosthetic implant with the first resected region.Type: ApplicationFiled: December 5, 2016Publication date: June 1, 2017Inventors: Stuart L. Axelson, JR., Donald W. Malackowski, John Michael Stuart
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Patent number: 9655727Abstract: Disclosed herein are knee replacement systems for replacing the articular surface of a distal femur. The systems include one or more unicompartmental components, namely patellofemoral, lateral condylar and medial condylar components. The components are configured such that when engaged to the femur the peripheries thereof do not cross specific locations and/or regions of the femur, namely the intercondylar notch and condylopatellar notch. The patellofemoral components described herein preferably have an extension portion extending posteriorly from a posterior periphery thereof towards an intercondylar notch or the femur without contacting the intercondylar notch of the femur when the patellofemoral component is engaged to the femur. The extension portion preferably extends posteriorly from a posterior periphery of the patellofemoral component towards the condylopatellar notch of the femur without contacting the notch.Type: GrantFiled: December 12, 2013Date of Patent: May 23, 2017Assignee: Stryker CorporationInventors: Peter John Wellings, Michael C. Ferko, Stuart L. Axelson, Jr.
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Publication number: 20170086983Abstract: Disclosed herein are methods of designing and fabricating prosthetic implants having a sagittal wall in which at least a portion thereof traverses a non-linear path. A method of fabricating such a prosthetic implant may include generating a virtual bone model based on image information obtained from at least one bone, determining a proposed height of the prosthetic implant at a first location on the virtual bone model, determining a proposed resection depth into the at least one bone at the first location based at least in part on the proposed height of the prosthetic implant, and determining a curved resection path across a portion of the virtual bone model. The curved resection path may intersect the first location and the prosthetic implant may have a curved sagittal wall corresponding to the curved resection path.Type: ApplicationFiled: December 12, 2016Publication date: March 30, 2017Inventors: Robert Davignon, Michael C. Ferko, Stuart L. Axelson, JR.
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Patent number: 9579216Abstract: Disclosed herein are systems and methods for bone preparation with designed areas having accurate tolerance profiles to enable improved initial fixation and stability for cementless implants and to improve long-term bone ingrowth/ongrowth to an implant. A method of preparing a bone surface to receive a prosthetic implant thereon having an articular surface and a bone contacting surface includes resecting the bone surface at a first location to create a first resected region having a first tolerance profile with a first cross-section, resecting the bone surface at a second location to create a second resected region having a second tolerance profile with a second cross-section less dense than the first cross-section, and contacting the bone contacting surface of the prosthetic implant with the first resected region.Type: GrantFiled: July 27, 2016Date of Patent: February 28, 2017Assignee: Stryker CorporationInventors: Stuart L. Axelson, Jr., Donald W. Malackowski, John Michael Stuart
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Patent number: 9554862Abstract: Disclosed herein are methods of designing and fabricating prosthetic implants having a sagittal wall in which at least a portion thereof traverses a non-linear path. A method of fabricating such a prosthetic implant may include generating a virtual bone model based on image information obtained from at least one bone, determining a proposed height of the prosthetic implant at a first location on the virtual bone model, determining a proposed resection depth into the at least one bone at the first location based at least in part on the proposed height of the prosthetic implant, and determining a curved resection path across a portion of the virtual bone model. The curved resection path may intersect the first location and the prosthetic implant may have a curved sagittal wall corresponding to the curved resection path.Type: GrantFiled: June 5, 2014Date of Patent: January 31, 2017Assignee: Mako Surgical Corp.Inventors: Robert Davignon, Michael C. Ferko, Stuart L. Axelson, Jr.