Patents by Inventor David G. Lewallen
David G. Lewallen 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: 10201426Abstract: A prosthetic system that includes a prosthetic implant and a support structure secured to an inner surface of the cavity in the end of the bone is disclosed. The support structure defines a channel that extends through the length of the support structure. The prosthetic implant is received in the channel, and a portion of the prosthetic implant is secured to an inner surface of the channel by an adhesive. The stem of the prosthesis beyond the channel may be cemented or uncemented. The support structure may have an approximately funnel shape. The support structure may be a hollow porous cylindrical sleeve. The support structure may comprise a pair of partially hemispherical components arranged in spaced apart relationship thereby defining a channel between the pair of components. The support structure may comprise a plurality of pedestals secured to the inner surface of the cavity of the bone.Type: GrantFiled: November 15, 2006Date of Patent: February 12, 2019Assignee: Zimmer, Inc.Inventors: Arlen D. Hanssen, David G. Lewallen
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Patent number: 10092404Abstract: A prosthetic system that includes a prosthetic implant and a support structure secured to an inner surface of a cavity of a bone is disclosed. The support structure defines a channel that extends through the length of the support structure. The prosthetic implant is received in the channel, and a portion of the prosthetic implant is secured to an inner surface of the support structure by an adhesive. The support structure may comprise a pair of partially hemispherical components arranged in spaced apart relationship thereby defining the channel between the pair of components.Type: GrantFiled: September 14, 2012Date of Patent: October 9, 2018Assignee: Zimmer, Inc.Inventors: Arlen D. Hanssen, David G. Lewallen
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Patent number: 9981063Abstract: A composite for osteochondral defect repair includes a porous scaffold and a periosteal graft secured to a surface of the scaffold. The composite provides cartilage growth from autologous periosteum chondrogenesis. Biological resurfacing of large osteochondral defects, or a complete joint is feasible using the porous scaffold/autologous periosteal composite. The use of this composite eliminates the necessity of using normal cartilage surface as a donor site and its respective associated morbidity. In one form, the strong bone integration capacity of a porous metal (e.g., tantalum) scaffold and the high grade of integration observed from periosteal chondrogenesis into the normal cartilage eliminates the lack of chondral-chondral integration observed in the autologous osteochondral graft technique.Type: GrantFiled: November 23, 2005Date of Patent: May 29, 2018Assignee: Mayo Foundation for Medical Education and ResearchInventors: Shawn W. O'Driscoll, David G. Lewallen, Rodrigo Mardones
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Patent number: 9044326Abstract: A femoral augment, or set of augments, for use with a knee joint prosthesis, where the femoral augment includes a main body portion, an aperture formed within the main body portion and extending in a generally distal/proximal direction, and a pair of legs extending outwardly from said main body portion in a generally posterior direction. In the preferred embodiment, the aperture is configured to receive a stem extension implant, and to allow it to pass through. Additionally, the legs of the femoral augment are preferably configured to be seated proximal of a proximal side of a pair of condylar portions of a femoral component of a knee joint prosthesis. The present invention is intended for situations in which the distal portion of the femur is defective, and it provides a method and devices that allow for preservation of healthy peripheral bone.Type: GrantFiled: January 14, 2011Date of Patent: June 2, 2015Assignee: Zimmer, Inc.Inventors: Jeff Blaylock, Michael Cook, Ron Donkers, Scott Dykema, Maleata Hall, John Meyers, Arlen D. Hanssen, David G. Lewallen
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Publication number: 20140379008Abstract: Methods and devices are disclosed for the attachment of a soft tissue structure (e.g., tendon or ligament) to bone or a prosthetic implant. In one form, the device includes a clamp having a convex tissue engaging surface. A fastener compresses the soft tissue between the tissue engaging surface and the bone or the prosthetic implant. In another form, the device includes a second clamp comprising a porous metallic material. The second clamp has a first surface, a concave tissue engaging surface opposite the first surface, and a throughhole for a fastener. The second clamp is placed adjacent the bone, the soft tissue is placed adjacent the second clamp, and the first clamp is placed adjacent the soft tissue. The soft tissue is compressed between the convex tissue engaging surface of the first clamp and the concave tissue engaging surface of the second clamp using the fastener.Type: ApplicationFiled: September 10, 2014Publication date: December 25, 2014Inventor: DAVID G. LEWALLEN
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Patent number: 8858634Abstract: Methods and devices are disclosed for the attachment of a soft tissue structure (e.g., tendon or ligament) to bone or a prosthetic implant. In one form, the device includes a clamp having a convex tissue engaging surface. A fastener compresses the soft tissue between the tissue engaging surface and the bone or the prosthetic implant. In another form, the device includes a second clamp comprising a porous metallic material. The second clamp has a first surface, a concave tissue engaging surface opposite the first surface, and a throughhole for a fastener. The second clamp is placed adjacent the bone, the soft tissue is placed adjacent the second clamp, and the first clamp is placed adjacent the soft tissue. The soft tissue is compressed between the convex tissue engaging surface of the first clamp and the concave tissue engaging surface of the second clamp using the fastener.Type: GrantFiled: November 4, 2009Date of Patent: October 14, 2014Assignee: Mayo Foundation for Medical Education and ResearchInventor: David G. Lewallen
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Patent number: 8728168Abstract: A prosthetic system that includes a prosthetic implant and a support structure secured to an inner surface of a cavity of a bone is disclosed. The support structure defines a channel that extends through the length of the support structure. The prosthetic implant is received in the channel, and a portion of the prosthetic implant is secured to an inner surface of the support structure by an adhesive. The support structure may comprise a pair of partially hemispherical components arranged in spaced apart relationship thereby defining the channel between the pair of components.Type: GrantFiled: November 15, 2010Date of Patent: May 20, 2014Assignee: Zimmer, Inc.Inventors: Arlen D. Hanssen, David G. Lewallen
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Patent number: 8535385Abstract: A prosthetic system that includes a prosthetic implant and a support structure secured to an inner surface of the cavity in the end of the bone is disclosed. The support structure defines a channel that extends through the length of the support structure. The prosthetic implant is received in the channel, and a portion of the prosthetic implant is secured to an inner surface of the channel by an adhesive. The stem of the prosthesis beyond the channel may be cemented or uncemented. The support structure may have an approximately funnel shape. The support structure may be a hollow porous cylindrical sleeve. The support structure may comprise a pair of partially hemispherical components arranged in spaced apart relationship thereby defining a channel between the pair of components. The support structure may comprise a plurality of pedestals secured to the inner surface of the cavity of the bone.Type: GrantFiled: August 8, 2011Date of Patent: September 17, 2013Assignee: Zimmer, Inc.Inventors: Arlen D. Hanssen, David G. Lewallen
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Patent number: 8506645Abstract: A tibial augment for use with a knee joint prosthesis, composed of annular members of different stock sizes, each size being configured to fit within a cavity formed in a human tibia. The augment may include a stepped distal surface. A provisional (temporary) tibial augment used to ensure a proper fit for the permanent augment is also provided. The provisional may include grooves configured to cooperate with a set of ribs on a tong-like holder used for removing the provisional from the cavity. A pusher for use implanting the tibial augment is also provided. In addition, a system for creating a cavity in a human tibia is also described. The system preferably includes a guide with a slot therein and a set of osteotomes that are inserted within different portions of the slot. Methods for using the tools and/or implanting the prosthetic devices discussed above are also described.Type: GrantFiled: September 20, 2010Date of Patent: August 13, 2013Assignee: Zimmer, Inc.Inventors: Jeff Blaylock, Michael Cook, Ron Donkers, Scott E. Dykema, David Jones, John E. Meyers, Stephen J. Vankoski, Arlen D. Hanssen, David G. Lewallen
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Publication number: 20130013078Abstract: A prosthetic system that includes a prosthetic implant and a support structure secured to an inner surface of a cavity of a bone is disclosed. The support structure defines a channel that extends through the length of the support structure. The prosthetic implant is received in the channel, and a portion of the prosthetic implant is secured to an inner surface of the support structure by an adhesive. The support structure may comprise a pair of partially hemispherical components arranged in spaced apart relationship thereby defining the channel between the pair of components.Type: ApplicationFiled: September 14, 2012Publication date: January 10, 2013Applicant: Zimmer, Inc.Inventors: Arlen D. Hanssen, David G. Lewallen
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Publication number: 20130013080Abstract: A prosthetic system that includes a prosthetic implant and a support structure secured to an inner surface of a cavity of a bone is disclosed. The support structure defines a channel that extends through the length of the support structure. The prosthetic implant is received in the channel, and a portion of the prosthetic implant is secured to an inner surface of the support structure by an adhesive. The support structure may comprise a pair of partially hemispherical components arranged in spaced apart relationship thereby defining the channel between the pair of components.Type: ApplicationFiled: September 14, 2012Publication date: January 10, 2013Applicant: Zimmer, Inc.Inventors: Arlen D. Hanssen, David G. Lewallen
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Publication number: 20110295382Abstract: A prosthetic system that includes a prosthetic implant and a support structure secured to an inner surface of the cavity in the end of the bone is disclosed. The support structure defines a channel that extends through the length of the support structure. The prosthetic implant is received in the channel, and a portion of the prosthetic implant is secured to an inner surface of the channel by an adhesive. The stem of the prosthesis beyond the channel may be cemented or uncemented. The support structure may have an approximately funnel shape. The support structure may be a hollow porous cylindrical sleeve. The support structure may comprise a pair of partially hemispherical components arranged in spaced apart relationship thereby defining a channel between the pair of components. The support structure may comprise a plurality of pedestals secured to the inner surface of the cavity of the bone.Type: ApplicationFiled: August 8, 2011Publication date: December 1, 2011Applicant: ZIMMER, INC.Inventors: Arlen D. Hanssen, David G. Lewallen
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Patent number: 8029570Abstract: Permanent magnets are implanted in bone to unload compressive forces at joints using the repulsive force therebetween. A porous metal container is implanted first and becomes fixed in place by bone growth. The permanent magnet is then inserted in the container and retained in place. A magnet prescription system includes a display and input device which enables a user to alter parameters such as magnet size, strength and placement and calculate and display the repulsive force that will result.Type: GrantFiled: September 25, 2002Date of Patent: October 4, 2011Assignee: Mayo Foundation for Medical Education and ResearchInventors: Darryl E. Barnes, David G. Lewallen, Kenton R. Kaufman
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Publication number: 20110112651Abstract: A femoral augment, or set of augments, for use with a knee joint prosthesis, where the femoral augment includes a main body portion, an aperture formed within the main body portion and extending in a generally distal/proximal direction, and a pair of legs extending outwardly from said main body portion in a generally posterior direction. In the preferred embodiment, the aperture is configured to receive a stem extension implant, and to allow it to pass through. Additionally, the legs of the femoral augment are preferably configured to be seated proximal of a proximal side of a pair of condylar portions of a femoral component of a knee joint prosthesis. The present invention is intended for situations in which the distal portion of the femur is defective, and it provides a method and devices that allow for preservation of healthy peripheral bone, while still providing the necessary augmentation to the distal portion of the femur.Type: ApplicationFiled: January 14, 2011Publication date: May 12, 2011Applicant: ZIMMER, INC.Inventors: Jeff Blaylock, Michael Cook, Ron Donkers, Scott Dykema, Maleata Hall, John Meyers, Arlen D. Hanssen, David G. Lewallen
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Publication number: 20110066252Abstract: A prosthetic system that includes a prosthetic implant and a support structure secured to an inner surface of a cavity of a bone is disclosed. The support structure defines a channel that extends through the length of the support structure. The prosthetic implant is received in the channel, and a portion of the prosthetic implant is secured to an inner surface of the support structure by an adhesive. The support structure may comprise a pair of partially hemispherical components arranged in spaced apart relationship thereby defining the channel between the pair of components.Type: ApplicationFiled: November 15, 2010Publication date: March 17, 2011Applicant: ZIMMER, INC.Inventors: Arlen D. Hanssen, David G. Lewallen
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Patent number: 7892288Abstract: A femoral augment, or set of augments, for use with a knee joint prosthesis, where the femoral augment includes a main body portion, an aperture formed within the main body portion and extending in a generally distal/proximal direction, and a pair of legs extending outwardly from said main body portion in a generally posterior direction. In the preferred embodiment, the aperture is configured to receive a stem extension implant, and to allow it to pass through. Additionally, the legs of the femoral augment are preferably configured to be seated proximal of a proximal side of a pair of condylar portions of a femoral component of a knee joint prosthesis. The present invention is intended for situations in which the distal portion of the femur is defective, and it provides a method and devices that allow for preservation of healthy peripheral bone, while still providing the necessary augmentation to the distal portion of the femur.Type: GrantFiled: March 5, 2004Date of Patent: February 22, 2011Assignee: Zimmer Technology, Inc.Inventors: Jeff Blaylock, Michael Cook, Ron Donkers, Scott Dykema, Maleata Hall, John Meyers, Arlen D. Hanssen, David G. Lewallen
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Publication number: 20110009974Abstract: A tibial augment for use with a knee joint prosthesis, composed of annular members of different stock sizes, each size being configured to fit within a cavity formed in a human tibia. The augment may include a stepped distal surface. A provisional (temporary) tibial augment used to ensure a proper fit for the permanent augment is also provided. The provisional may include grooves configured to cooperate with a set of ribs on a tong-like holder used for removing the provisional from the cavity. A pusher for use implanting the tibial augment is also provided. In addition, a system for creating a cavity in a human tibia is also described. The system preferably includes a guide with a slot therein and a set of osteotomes that are inserted within different portions of the slot. Methods for using the tools and/or implanting the prosthetic devices discussed above are also described.Type: ApplicationFiled: September 20, 2010Publication date: January 13, 2011Applicant: ZIMMER TECHNOLOGY, INC.Inventors: Jeff Blaylock, Michael Cook, Ron Donkers, Scott Dykema, David Jones, John Meyers, Stephen Vankoski, Arlen D. Hanssen, David G. Lewallen
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Publication number: 20100145452Abstract: A prosthetic system that includes a prosthetic implant and a support structure secured to an inner surface of a cavity of a bone is disclosed. The support structure defines a channel that extends through the length of the support structure. The prosthetic implant is received in the channel, and a portion of the prosthetic implant is secured to an inner surface of the support structure by an adhesive. The support structure may comprise a pair of partially hemispherical components arranged in spaced apart relationship thereby defining the channel between the pair of components.Type: ApplicationFiled: February 9, 2010Publication date: June 10, 2010Applicant: ZIMMER, INC.Inventors: Jeff Blaylock, Michael Cook, Ron Donkers, Scott Dykema, Maleata Hall, John Meyers, Arlen D. Hanssen, David G. Lewallen
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Publication number: 20100114127Abstract: Methods and devices are disclosed for the attachment of a soft tissue structure (e.g., tendon or ligament) to bone or a prosthetic implant. In one form, the device includes a clamp comprising a porous metallic material. The clamp includes a convex tissue engaging surface. The device also includes a fastener for compressing the soft tissue between the tissue engaging surface and the bone or the prosthetic implant. The porous metallic material allows the ingrowth of soft tissue into the clamp. In another form, the device includes a second clamp comprising a porous metallic material. The second clamp including a first surface, a concave tissue engaging surface opposite the first surface, and a throughhole extending from the first surface to the concave tissue engaging surface. The second clamp is placed adjacent the bone, the soft tissue is placed adjacent the second clamp, and the first clamp is placed adjacent the soft tissue.Type: ApplicationFiled: November 4, 2009Publication date: May 6, 2010Inventor: David G. Lewallen
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Patent number: D684693Type: GrantFiled: November 15, 2010Date of Patent: June 18, 2013Assignee: Zimmer, Inc.Inventors: Arlen D. Hanssen, David G. Lewallen