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).

  • Patent number: 10561501
    Abstract: 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: Grant
    Filed: January 18, 2018
    Date of Patent: February 18, 2020
    Assignee: Encore Medical, L.P.
    Inventors: 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
  • Patent number: 10537441
    Abstract: 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: Grant
    Filed: March 12, 2018
    Date of Patent: January 21, 2020
    Assignee: Stryker Corporation
    Inventors: Stuart L. Axelson, Jr., Donald W. Malackowski, John Michael Stuart
  • Publication number: 20190125541
    Abstract: Disclosed herein are patellar implants and methods to prepare bone for receiving the same. The patellar implant may include an articulating surface with an elliptically shaped median ridge. The anterior surface of the patellar implant may have a non-planar surface to engage with a resected natural patella. The non-planar surface may allow for varying thickness of the patellar implant. The patellar implant may include dual attachment features to secure patellar implant to a resected patella by onlay and inlay techniques. A method for attaching a patellar implant to a patella may include onlay and inlay techniques and may further include bone preparation at the implant-bone interface.
    Type: Application
    Filed: October 25, 2018
    Publication date: May 2, 2019
    Inventors: Stuart L. Axelson, JR., Robert Davignon, Sanghita Bhattacharya, Michael C. Ferko, Peter Wellings
  • Publication number: 20190117233
    Abstract: A dynamic trialing method generally allows a surgeon to perform a preliminary bone resection on the distal femur according to a curved or planar resection profile. With the curved resection profile, the distal-posterior femoral condyles may act as a femoral trial component after the preliminary bone resection. This may eliminate the need for a separate femoral trial component, reducing the cost and complexity of surgery. With the planar resection profile, shims or skid-like inserts that correlate to the distal-posterior condyles of the final insert may be attached to the distal femur after the preliminary bone resection to facilitate intraoperative trialing. The method and related components may also provide the ability of a surgeon to perform iterative intraoperative kinematic analysis and gap balancing, providing the surgeon the ability to perform necessary ligament and/or other soft tissue releases and fine tune the final implant positions based on data acquired during the surgery.
    Type: Application
    Filed: December 21, 2018
    Publication date: April 25, 2019
    Inventors: Stuart L. Axelson, JR., Emily Hampp, John R. Fossez
  • Patent number: 10245151
    Abstract: Disclosed herein are orthopedic implants having a medial portion and a lateral portion, each of the medial and lateral portions having a proximal surface and a distal surface opposite the proximal surface. An intermediate portion joins the medial and lateral portions, wherein the intermediate portion has a proximal surface angled to the proximal surfaces of the medial and lateral portions about a longitudinal axis of the orthopedic implant. The proximal surface of the medial portion is stepped from the proximal surface of the lateral portion about the longitudinal axis. The proximal surfaces of the medial and lateral portions are configured to receive corresponding medial and lateral inserts.
    Type: Grant
    Filed: June 10, 2016
    Date of Patent: April 2, 2019
    Assignee: Stryker Corporation
    Inventors: Robert Davignon, Michael C. Ferko, Stuart L. Axelson, Jr.
  • Patent number: 10238403
    Abstract: 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: Grant
    Filed: May 18, 2018
    Date of Patent: March 26, 2019
    Assignee: Howmedica Osteonics Corp.
    Inventors: James V. Bono, Stuart L. Axelson, Jr., Adam Bastian
  • Patent number: 10194919
    Abstract: A dynamic trialing method generally allows a surgeon to perform a preliminary bone resection on the distal femur according to a curved or planar resection profile. With the curved resection profile, the distal-posterior femoral condyles may act as a femoral trial component after the preliminary bone resection. This may eliminate the need for a separate femoral trial component, reducing the cost and complexity of surgery. With the planar resection profile, shims or skid-like inserts that correlate to the distal-posterior condyles of the final insert may be attached to the distal femur after the preliminary bone resection to facilitate intraoperative trialing. The method and related components may also provide the ability of a surgeon to perform iterative intraoperative kinematic analysis and gap balancing, providing the surgeon the ability to perform necessary ligament and/or other soft tissue releases and fine tune the final implant positions based on data acquired during the surgery.
    Type: Grant
    Filed: June 8, 2016
    Date of Patent: February 5, 2019
    Assignee: Howmedica Osteonics Corp.
    Inventors: Stuart L. Axelson, Jr., Emily Hampp, John R. Fossez
  • Patent number: 10182828
    Abstract: 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: Grant
    Filed: November 8, 2013
    Date of Patent: January 22, 2019
    Assignee: Stryker Corporation
    Inventors: Stuart L. Axelson, Jr., Michael A. McGovern, Rahul Ramachandran
  • Patent number: 10098747
    Abstract: 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: Grant
    Filed: March 9, 2017
    Date of Patent: October 16, 2018
    Assignee: Stryker Corporation
    Inventors: Peter Wellings, Michael C. Ferko, Stuart L. Axelson, Jr.
  • Publication number: 20180263640
    Abstract: 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: Application
    Filed: May 18, 2018
    Publication date: September 20, 2018
    Inventors: James V. Bono, Stuart L. Axelson, JR., Adam Bastian
  • Publication number: 20180235763
    Abstract: 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: Application
    Filed: February 21, 2018
    Publication date: August 23, 2018
    Inventors: 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
  • Publication number: 20180200072
    Abstract: 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: Application
    Filed: March 12, 2018
    Publication date: July 19, 2018
    Inventors: Stuart L. Axelson, JR., Donald W. Malackowski, John Michael Stuart
  • Publication number: 20180200067
    Abstract: 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: Application
    Filed: January 18, 2018
    Publication date: July 19, 2018
    Inventors: 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
  • Patent number: 9999429
    Abstract: 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: Grant
    Filed: June 28, 2017
    Date of Patent: June 19, 2018
    Assignee: Howmedica Osteonics Corp.
    Inventors: James V. Bono, Stuart L. Axelson, Jr., Adam Bastian
  • Patent number: 9937059
    Abstract: 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: Grant
    Filed: December 5, 2016
    Date of Patent: April 10, 2018
    Assignee: Stryker Corporation
    Inventors: Stuart L. Axelson, Jr., Donald W. Malackowski, John Michael Stuart
  • Patent number: 9937058
    Abstract: 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: Grant
    Filed: May 24, 2016
    Date of Patent: April 10, 2018
    Assignee: Stryker Corporation
    Inventors: Stuart L. Axelson, Jr., Michael C. Ferko, Peter John Wellings
  • Patent number: 9855057
    Abstract: 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: Grant
    Filed: June 23, 2015
    Date of Patent: January 2, 2018
    Assignee: Howmedica Osteonics Corp.
    Inventors: Stuart L. Axelson, Jr., Mohamed Soliman, Michael C. Ferko, Robert Frederick Simes, Jr., James H. Howell
  • Patent number: 9795397
    Abstract: 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: Grant
    Filed: April 25, 2016
    Date of Patent: October 24, 2017
    Assignee: Stryker Corporation
    Inventors: Carlos E. Collazo, Stuart L. Axelson, Jr., Michael C. Ferko, Emily Hampp
  • Publication number: 20170296206
    Abstract: 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: Application
    Filed: June 28, 2017
    Publication date: October 19, 2017
    Inventors: James V. Bono, Stuart L. Axelson, JR., Adam Bastian
  • Patent number: 9782261
    Abstract: 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: Grant
    Filed: February 25, 2014
    Date of Patent: October 10, 2017
    Assignee: Stryker Corporation
    Inventors: Carlos E. Collazo, Stuart L. Axelson, Jr., Michael C. Ferko, Emily Hampp