Patents by Inventor Michael C. Ferko
Michael C. Ferko 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: 11813167Abstract: A femoral implant for articulation with a patella or a patellar implant includes a body having an articular surface defining a trochlear groove. The trochlear groove is defined by a first trochlear radius at a first location along the trochlear groove and by a second trochlear radius at a second location along the trochlear groove, the first radius being different than the second radius. The configuration of the trochlear groove is such that it narrows as a patella or patellar implant moves from an extension configuration to a flexion configuration. A kit includes the femoral implant along with a patellar implant. A method of trialing involves use of the femoral implant or kit to ensure a smooth transition of the patella or the patellar implant from the femoral component to the adjacent bone.Type: GrantFiled: May 15, 2018Date of Patent: November 14, 2023Assignee: Howmedica Osteonics Corp.Inventors: Peter Wellings, Sandeep K. Chauhan, Michael C. Ferko
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Publication number: 20230063330Abstract: An optimized press-fit between a resected bone and an articular implant may, for instance, reduce undesirable qualities, including excess micromotion, stress transmission, and/or strain. By taking into account heterogeneous bone properties, the parameters of a bone resection can be determined as to optimize the press-fit between a resected bone and an articular implant. An optimized press-fit is obtained by determining ideal engagement characteristics corresponding to the fit between the fixation features of an articular implant and a bone. Then, taking into account a bone's heterogeneous properties, the parameters of a bone resection that would substantially achieve the determined ideal engagement characteristics are determined.Type: ApplicationFiled: November 7, 2022Publication date: March 2, 2023Inventor: Michael C. Ferko
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Patent number: 11491016Abstract: An optimized press-fit between a resected bone and an articular implant may, for instance, reduce undesirable qualities, including excess micromotion, stress transmission, and/or strain. By taking into account heterogeneous bone properties, the parameters of a bone resection can be determined as to optimize the press-fit between a resected bone and an articular implant. An optimized press-fit is obtained by determining ideal engagement characteristics corresponding to the fit between the fixation features of an articular implant and a bone. Then, taking into account a bone's heterogeneous properties, the parameters of a bone resection that would substantially achieve the determined ideal engagement characteristics are determined.Type: GrantFiled: August 3, 2018Date of Patent: November 8, 2022Assignee: Stryker CorporationInventor: Michael C. Ferko
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Patent number: 11278416Abstract: Disclosed herein are implants with pivots that can be rotated about these pivots to be implanted onto bone, and methods for implanting same. The implant may have a plurality of pivot pads and curved projections extending from one or more bone contacting surfaces. The pivot pads and curved projections may engage with corresponding features on bone for implantation and securement of the implant to the bone. The implant may be rotated about the plurality of pivot pads placed in corresponding recesses on bone to seat the projections into the corresponding recesses.Type: GrantFiled: November 14, 2019Date of Patent: March 22, 2022Assignee: Howmedica Osteonics Corp.Inventors: Michael C. Ferko, Peter Wellings
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Patent number: 11065015Abstract: Disclosed herein are systems and methods of patella arthroplasty. A navigated patella clamp used in an arthroplasty procedure includes first and second movable jaw members and an actuation member coupled to the first and second jaw members for moving the first and second jaw members along a plane toward and away from one another. The patella clamp further includes a tracker and adjustable stylus for positioning the clamp on a patient's patella below a desired resection plane. The adjustable stylus coupled to the clamp is used to check the position and orientation of the clamp with respect to the patella to ensure the correct amount of bone will be resected from the patella corresponding to the thickness of a patella component that will be implanted on the resected patella.Type: GrantFiled: March 13, 2019Date of Patent: July 20, 2021Assignee: Howmedica Osteonics Corp.Inventors: Emily Hampp, John R. Fossez, Michael C. Ferko
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Publication number: 20210145592Abstract: Disclosed herein are implants with pivots that can be rotated about these pivots to be implanted onto bone, and methods for implanting same. The implant may have a plurality of pivot pads and curved projections extending from one or more bone contacting surfaces. The pivot pads and curved projections may engage with corresponding features on bone for implantation and securement of the implant to the bone. The implant may be rotated about the plurality of pivot pads placed in corresponding recesses on bone to seat the projections into the corresponding recesses.Type: ApplicationFiled: November 14, 2019Publication date: May 20, 2021Inventors: Michael C. Ferko, Peter Wellings
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Publication number: 20210085473Abstract: 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: ApplicationFiled: December 8, 2020Publication date: March 25, 2021Applicant: Howmedica Osteonics Corp.Inventors: Stuart L. Axelson, JR., Robert Davignon, Sanghita Bhattacharya, Michael C. Ferko, Peter Wellings
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Patent number: 10893948Abstract: 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: GrantFiled: October 25, 2018Date of Patent: January 19, 2021Assignee: Howmedica Osteonics Corp.Inventors: Stuart L. Axelson, Jr., Robert Davignon, Sanghita Bhattacharya, Michael C. Ferko, Peter Wellings
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Patent number: 10687948Abstract: 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: December 12, 2016Date of Patent: June 23, 2020Assignee: Mako Surgical Corp.Inventors: Robert Davignon, Michael C. Ferko, Stuart L. Axelson, Jr.
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Patent number: 10588696Abstract: Disclosed herein are systems and methods of patella preparation. A method of patella preparation includes creating a patellar coordinate system utilizing key honey landmarks of a patella on a virtual model of an unresected patella. The method can further include defining a resection plane at a predetermined implant thickness and aligning the resection plane with the patellar coordinate system. Implant selection can be finalized on the resection plane to meet predetermined tolerances. A navigated patella clamp with a tracker and stylus can then be used to intraoperatively resect the patella and locate the implant.Type: GrantFiled: August 3, 2016Date of Patent: March 17, 2020Assignee: Mako Surgical Corp.Inventors: Michael C. Ferko, Emily Hampp
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Publication number: 20190209187Abstract: Disclosed herein are systems and methods of patella arthroplasty. A navigated patella clamp used in an arthroplasty procedure includes first and second movable jaw members and an actuation member coupled to the first and second jaw members for moving the first and second jaw members along a plane toward and away from one another. The patella clamp further includes a tracker and adjustable stylus for positioning the clamp on a patient's patella below a desired resection plane. The adjustable stylus coupled to the clamp is used to check the position and orientation of the clamp with respect to the patella to ensure the correct amount of bone will be resected from the patella corresponding to the thickness of a patella component that will be implanted on the resected patella.Type: ApplicationFiled: March 13, 2019Publication date: July 11, 2019Inventors: Emily Hampp, John R. Fossez, Michael C. Ferko
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Patent number: 10314599Abstract: Disclosed herein are systems and methods of patella arthroplasty. A navigated patella clamp used in an arthroplasty procedure includes first and second movable jaw members and an actuation member coupled to the first and second jaw members for moving the first and second jaw members along a plane toward and away from one another. The patella clamp further includes a tracker and adjustable stylus for positioning the clamp on a patient's patella below a desired resection plane. The adjustable stylus coupled to the clamp is used to check the position and orientation of the clamp with respect to the patella to ensure the correct amount of bone will be resected from the patella corresponding to the thickness of a patella component that will be implanted on the resected patella.Type: GrantFiled: March 31, 2016Date of Patent: June 11, 2019Assignee: Howmedica Osteonics Corp.Inventors: Emily Hampp, John R. Fossez, Michael C. Ferko
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Publication number: 20190125541Abstract: 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: ApplicationFiled: October 25, 2018Publication date: May 2, 2019Inventors: Stuart L. Axelson, JR., Robert Davignon, Sanghita Bhattacharya, Michael C. Ferko, Peter Wellings
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Patent number: 10245151Abstract: 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: GrantFiled: June 10, 2016Date of Patent: April 2, 2019Assignee: Stryker CorporationInventors: Robert Davignon, Michael C. Ferko, Stuart L. Axelson, Jr.
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Patent number: 10166109Abstract: An optimized press-fit between a resected bone and an articular implant may, for instance, reduce undesirable qualities, including excess micromotion, stress transmission, and/or strain. By taking into account heterogeneous bone properties, the parameters of a bone resection can be determined as to optimize the press-fit between a resected bone and an articular implant. An optimized press-fit is obtained by determining ideal engagement characteristics corresponding to the fit between the fixation features of an articular implant and a bone. Then, taking into account a bone's heterogeneous properties, the parameters of a bone resection that would substantially achieve the determined ideal engagement characteristics are determined.Type: GrantFiled: September 18, 2014Date of Patent: January 1, 2019Assignee: Stryker CorporationInventor: Michael C. Ferko
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Publication number: 20180338839Abstract: An optimized press-fit between a resected bone and an articular implant may, for instance, reduce undesirable qualities, including excess micromotion, stress transmission, and/or strain. By taking into account heterogeneous bone properties, the parameters of a bone resection can be determined as to optimize the press-fit between a resected bone and an articular implant. An optimized press-fit is obtained by determining ideal engagement characteristics corresponding to the fit between the fixation features of an articular implant and a bone. Then, taking into account a bone's heterogeneous properties, the parameters of a bone resection that would substantially achieve the determined ideal engagement characteristics are determined.Type: ApplicationFiled: August 3, 2018Publication date: November 29, 2018Inventor: Michael C. Ferko
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Publication number: 20180325685Abstract: A femoral implant for articulation with a patella or a patellar implant includes a body having an articular surface defining a trochlear groove. The trochlear groove is defined by a first trochlear radius at a first location along the trochlear groove and by a second trochlear radius at a second location along the trochlear groove, the first radius being different than the second radius. The configuration of the trochlear groove is such that it narrows as a patella or patellar implant moves from an extension configuration to a flexion configuration. A kit includes the femoral implant along with a patellar implant. A method of trialing involves use of the femoral implant or kit to ensure a smooth transition of the patella or the patellar implant from the femoral component to the adjacent bone.Type: ApplicationFiled: May 15, 2018Publication date: November 15, 2018Inventors: Peter Wellings, Sandeep K. Chauhan, Michael C. Ferko
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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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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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Publication number: 20180036083Abstract: Disclosed herein are systems and methods of patella preparation. A method of patella preparation includes creating a patellar coordinate system utilizing key honey landmarks of a patella on a virtual model of an unresected patella. The method can further include defining a resection plane at a predetermined implant thickness and aligning the resection plane with the patellar coordinate system. Implant selection can be finalized on the resection plane to meet predetermined tolerances. A navigated patella clamp with a tracker and stylus can then be used to intraoperatively resect the patella and locate the implant.Type: ApplicationFiled: August 3, 2016Publication date: February 8, 2018Inventors: Michael C. Ferko, Emily Hampp