Femoral Stem Patents (Class 623/23.15)
  • Patent number: 10278823
    Abstract: Disclosed are femoral stem for hip implants, and methods of design and manufacture thereof. A femoral stem for a hip implant, comprising a femoral neck extending from a proximal end of the femoral stem towards a distal end of the femoral stem; an upper section connected to and extending from the femoral neck towards the distal end of the femoral stem, wherein the upper section comprises at least one proximal-distal solid rib flanked by an open lattice; and a lower section connected to and extending from the upper section to the distal end of the femoral stem, wherein the lower section comprises a closed lattice enclosed in a solid skin. Such femoral stems for hip implants are customized and manufactured using 3D printing technologies and provide a lightweight alternative to conventional him implants.
    Type: Grant
    Filed: August 28, 2018
    Date of Patent: May 7, 2019
    Assignee: ZSFab, Inc.
    Inventors: Zhenyu Xue, Kai Xu, Jing Zhang
  • Patent number: 10278825
    Abstract: A knee prosthesis including a knee component and an indexing boss. The knee component includes a first engagement portion. The indexing boss includes a first terminal end surface, a second terminal end surface, and a second engagement portion at the second terminal end surface. The first terminal end surface and the second terminal end surface are arranged along non-parallel planes. The first and the second engagement portions are configured to selectively couple together at a plurality of rotational orientations to attain a corresponding plurality of angular orientations of the indexing boss relative to the knee component due to the first and the second terminal end surfaces being arranged along non-parallel planes.
    Type: Grant
    Filed: January 21, 2015
    Date of Patent: May 7, 2019
    Assignee: Biomet Manufacturing, LLC
    Inventor: Curt Collard
  • Patent number: 10213315
    Abstract: Apparatuses, kits, and methods for cementing an orthopedic implant to a bone, post attachment, are disclosed in some aspects of the present disclosure. A kit can include a prosthetic component and a cement applicator. The prosthetic component can include an attachment profile that corresponds to a mating profile formed on or in a bone. The cement applicator can be configured to apply a bone cement between the bone and the prosthetic component following alignment between the prosthetic component and the bone or another prosthetic component. The kit can also include a bone cement. A method can include positioning the prosthetic component adjacent to the bone, aligning the prosthetic component relative to the bone or another prosthetic component, and applying a bone cement between the bone and the aligned prosthetic component.
    Type: Grant
    Filed: February 11, 2016
    Date of Patent: February 26, 2019
    Assignee: Zimmer, Inc.
    Inventors: Duane Gillard, James Richard Miller, Jr., Stephen H. Hoag, Justin S Hertzler
  • Patent number: 10166109
    Abstract: 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: Grant
    Filed: September 18, 2014
    Date of Patent: January 1, 2019
    Assignee: Stryker Corporation
    Inventor: Michael C. Ferko
  • Patent number: 10064731
    Abstract: A blade-like stem of a hip joint prosthesis for anchoring in the femur, including a prosthesis neck portion and a femur-anchoring portion extending therefrom and having a proximal end and a distal end, the femur-anchoring portion including a proximal arcuate portion extending from a location adjacent the proximal end and having a radius of curvature that changes in a distal-to-proximal direction, and the femur-anchoring portion further including a distal tapered portion extending from the proximal arcuate portion toward the distal end.
    Type: Grant
    Filed: November 21, 2016
    Date of Patent: September 4, 2018
    Assignee: Smith & Nephew Orthopaedics AG
    Inventors: Walter Moser, Alex Seidl, Dirk Wunderle
  • Patent number: 9937028
    Abstract: A delivery device for inserting a prosthesis to repair a muscle wall defect has platen and a handle attached to the platen. The platen is collapsible to a reduced configuration. A prosthesis is formed with a pocket to receive the platen and can be maneuvered in to position with the handle. After the prosthesis is secured, the platen is removed.
    Type: Grant
    Filed: January 29, 2014
    Date of Patent: April 10, 2018
    Assignee: Bard Shannon Limited
    Inventor: Stephen Werner Pankratz
  • Patent number: 9872774
    Abstract: A femoral component having a modular stem is discussed. While the femoral component can have any suitable characteristic, in some cases, it includes an external articular surface and an internal surface. While the stem can have any characteristic, in some cases, it includes a proximal end and a distal end. Although the femoral component and stem can attach to a femur in any suitable manner, in some cases, the stem is inserted into the femur's intramedullary canal. In some cases, the femoral component is then: slid onto a resectioned portion of the femur at an angle between 20 and 80 degrees with respect to a longitudinal axis of the femur's distal portion, by rolling the femoral component onto the resectioned portion, or in any other suitable manner. In some cases, the distal end of the stem is then permanently fixed to the femoral component's internal surface. Other implementations are described.
    Type: Grant
    Filed: December 19, 2015
    Date of Patent: January 23, 2018
    Inventors: Connor E. Samuelson, Marcus F. Samuelson, Alec C. Samuelson, Kent M. Samuelson
  • Patent number: 9833326
    Abstract: A method and apparatus for coupling soft tissue to a prosthetic is disclosed. Soft tissue attachment pads having porous metal attachment regions and suture accepting holes are selectively positioned onto an implantable prosthetic to provide coupling locations.
    Type: Grant
    Filed: May 23, 2016
    Date of Patent: December 5, 2017
    Assignee: Biomet Manufacturing, LLC
    Inventors: Joshua R. Porter, Nathan A. Winslow, Jeffrey Kneisl, John W. Sperling
  • Patent number: 9763717
    Abstract: The present invention relates to a screw suitable for being implanted inside a bone, characterized in that said screw comprises two to four inverted cones along the longitudinal axis thereof, where the narrowest tip of the bottom cone corresponds to the bottom tip of the screw and where the height of each one of the cones at either end of the screw is between 20% and 80% of the total length of the screw, ensuring better acceptance, adaptation and osseous integration, and reducing trauma due to the pressure the implant exerts on the bone when the screw is fully tightened, minimizing reabsorption and, thus, producing more aesthetically pleasing results.
    Type: Grant
    Filed: March 3, 2010
    Date of Patent: September 19, 2017
    Inventor: Luis Mauricio Chiquillo Perez
  • Patent number: 9498340
    Abstract: A blade-like stem of a hip joint prosthesis for anchoring in the femur, including a portion comprising a prosthesis neck on the one hand and a femur-anchoring portion tapering towards a distal end on the other hand, the lateral narrow side of which comprises a distal straight portion and a proximal arcuate portion, the straight portion extending over a length of from 60% to 75% of the total length of the stem.
    Type: Grant
    Filed: August 8, 2006
    Date of Patent: November 22, 2016
    Assignee: Smith & Nephew Orthopaedics AG
    Inventors: Walter Moser, Alex Seidl, Dirk Wunderle
  • Patent number: 9427322
    Abstract: Hip implant femoral component includes a stem, say, as a flattened, rounded tapered spike having an upper trunnion with a self-holding taper, which may be symmetrical about the same central axis. A neck—say, as a flattened, curved mass having a lower receptacle with a self-holding taper to receive the stem trunnion, and an upper trunnion with a self-holding taper for holding a ball head with a corresponding receptacle—may be attached. A securing screw for threading into a threaded receptacle of the stem trunnion, which may have a truncated inverse cone head, may be employed to further secure the stem and neck together. The component, especially the stem and neck, or stem, neck and screw, may be made with a nonmagnetic cobalt-chromium-molybdenum alloy exhibiting high strength, wear and corrosion resistance, as a wrought powder metallurgy product, which is essentially if not fully 100% dense.
    Type: Grant
    Filed: June 25, 2013
    Date of Patent: August 30, 2016
    Assignee: Signal Medical Corporation
    Inventor: Louis A. Serafin, Jr.
  • Patent number: 9345580
    Abstract: A method and apparatus for coupling soft tissue to a prosthetic is disclosed. Soft tissue attachment pads having porous metal attachment regions and suture accepting holes are selectively positioned onto an implantable prosthetic to provide coupling locations.
    Type: Grant
    Filed: May 5, 2014
    Date of Patent: May 24, 2016
    Assignee: BIOMET MANUFACTURING, LLC
    Inventors: Joshua R. Porter, Nathan A. Winslow, Jeffrey Kneisl, John W. Sperling
  • Patent number: 9216087
    Abstract: The present disclosure provides a femoral prosthesis for use during a revision procedure. The femoral prosthesis includes a body, a neck, a stem, and a sleeve. The sleeve facilitates reattachment of an osteotomized proximal femur, specifically the greater trochanter, following a revision femoral prosthesis surgery involving an extended trochanteric osteotomy. Additionally, the sleeve promotes ingrowth of the osteotomized proximal femur with the sleeve.
    Type: Grant
    Filed: October 11, 2013
    Date of Patent: December 22, 2015
    Assignee: Zimmer, Inc.
    Inventor: Jeff Dickerson
  • Patent number: 9011549
    Abstract: A trial device and a method for using the device in surgery are disclosed. The device includes a body including a proximal portion and a distal portion. The proximal portion has a post or trunion projecting therefrom. The distal portion extends from the proximal portion and includes a first arm and a second arm, the first and second arms being movable with respect to one another. The body further includes a cavity formed therein so as to extend through the proximal portion and into the distal portion. The device further includes a driver adapted for sliding engagement within the internal cavity of the body such that movement of the driver, preferably in a distal direction, causes movement of a portion of the first arm away from a portion of the second arm.
    Type: Grant
    Filed: June 18, 2012
    Date of Patent: April 21, 2015
    Assignee: Howmedica Osteonics Corp.
    Inventors: Roy Philip Splieth, Shawn Michael Kroll
  • Patent number: 9005305
    Abstract: Methods and apparatuses for attaching tissue structures to orthopaedic implants. In one exemplary embodiment, the methods and apparatuses are used to attach soft tissue and/or bone to a proximal tibial implant. In another exemplary embodiment, the methods and apparatuses are used to attach soft tissue and/or bone to a proximal femoral implant.
    Type: Grant
    Filed: March 26, 2012
    Date of Patent: April 14, 2015
    Assignee: Zimmer, Inc.
    Inventors: John E. Meyers, Robert E. Montgomery, Dennis R. Aquilo, Douglas G. Branscome, Kelly A. Timmons, Kimberly Les, Peter F. Choong, Peter E. Darrigan, Luke Vaughan, Ernest U. Conrad, Jay S. Wunder, David H. Anderson, Kevin S. Cook, G. Douglas Letson, Gary D. Bos
  • Patent number: 8979940
    Abstract: Disclosed is an apparatus that can be positioned in a subject to include, selectively, a modular connection portion. The modular connection portion can be provided to allow for soft tissue connection that replaces a greater trochanter of a natural femur. The soft tissue connection portion can include a plurality of regions to allow for reattachment of soft tissue in a plurality of position to mimic a natural anatomy. A method of using, selecting, and implanting the prosthesis is also disclosed.
    Type: Grant
    Filed: December 14, 2012
    Date of Patent: March 17, 2015
    Assignee: Biomet Manufacturing, LLC
    Inventors: Joshua R. Porter, Troy W. Hershberger, Aaron P. Smith
  • Patent number: 8876909
    Abstract: A method for centering a stem of an implant at an implantation site. The method includes implanting at the implantation site the implant having a sleeve rigidly mounted to the stem of the implant, the stem extends through an interior area of the sleeve. The method further includes compressing the sleeve by applying force to the sleeve to expand a mesh portion of the sleeve outward from the stem and into engagement with sidewalls of the implantation site to thereby center the stem at the implantation site.
    Type: Grant
    Filed: November 18, 2013
    Date of Patent: November 4, 2014
    Assignee: Biomet Manufacturing, LLC
    Inventors: Jason D. Meridew, John R. White, Mark A. Bollinger
  • Patent number: 8852288
    Abstract: A hip prosthesis has an oblong plate with at one head end a mounting pin provided with a hinge ball, and at the opposite head end a fastening pin for fastening the hip prosthesis in a shaft of a bone. A first part of the plate extends on a first side of the mounting pin. The mounting pin forms an angle ? smaller than 90 degrees with the first part of the plate and the tangent to the fastening pin at the location of the connection between the fastening pin and the first part of the plate forms an angle ? greater than 90 degrees with the first part of the plate. In order to insert the hip prosthesis into a bone in a simple manner, the fastening pin includes a curved shape from the plate onwards in a direction to the first part of the plate.
    Type: Grant
    Filed: May 8, 2008
    Date of Patent: October 7, 2014
    Assignee: Biomet UK Limited
    Inventor: Erik Leonard Hoffman
  • Patent number: 8840675
    Abstract: A minimal invasive hip arthroplasty device is provided. The device includes a long nail portion, a lag screw portion, distal locking screws, and a resurfacing head. The long nail portion is inserted into a shaft body of a femur from a top portion of the femur and disposed in the femur. The lag screw portion engages and anchors at the long nail portion through a lag screw hole, and the lag screw portion is inserted into a neck of the femur. The distal locking screws queue through the shaft body of the femur perpendicularly and fix the long nail portion to the femur further. The resurfacing head includes a cup portion configured to cover a head of the femur and a fixing pin portion configured to be inserted into the head and the neck of the femur and engaging the lag screw portion through a resurfacing head hole.
    Type: Grant
    Filed: April 22, 2010
    Date of Patent: September 23, 2014
    Inventor: Benjamin Soo-il Song
  • Patent number: 8834470
    Abstract: A bone repairing kit including a drilling device, a pushing device, a clamping member and a hole saw. An end of a tube body of the drilling device is a knife portion. When the tube body rotates with respect to a femur, a bone column is cut by the knife portion and located in the tube body. The pushing device includes a hollow tube and a push bar. The hollow tube is for receiving the tube body. The push bar is for touching and pushing the bone column in the tube body. The clamping member is for clamping the bone column. The hole saw includes a receiving body and cutting knives. The receiving body has a recess for receiving an end of the bone column. The cutting knives surrounding on an inner wall of the recess are for cutting an edge of the end of the bone column.
    Type: Grant
    Filed: November 6, 2013
    Date of Patent: September 16, 2014
    Assignee: Industrial Technology Research Institute
    Inventors: Chun-Jen Liao, Ching-Chuan Jiang, Sung-Ching Chen, Pei-Chi Hsu, Shih-Jui Han
  • Patent number: 8790402
    Abstract: An orthopaedic implant for filling voids in bones, and methods of using the same. The orthopaedic implant comprises an open porous metal component, having pores for promoting bone regeneration, and a resorbable bone growth promoting component which is resorbed into new bone. The orthopaedic implant and methods of the present disclosure provide structural support for the bone as well as osteoconductive and/or osteoinductive matrix for promoting bone re-growth within bone void. Advantageously, the orthopaedic implants and methods disclosed herein are useful in filling critically sized bone voids.
    Type: Grant
    Filed: January 8, 2013
    Date of Patent: July 29, 2014
    Assignee: Zimmer, Inc.
    Inventors: Matthew E. Monaghan, Timothy A. Hoeman
  • Publication number: 20140172115
    Abstract: Disclosed is an apparatus that can be positioned in a subject to include, selectively, a modular connection portion. The modular connection portion can be provided to allow for soft tissue connection that replaces a greater trochanter of a natural femur. The soft tissue connection portion can include a plurality of regions to allow for reattachment of soft tissue in a plurality of position to mimic a natural anatomy. A method of using, selecting, and implanting the prosthesis is also disclosed.
    Type: Application
    Filed: December 14, 2012
    Publication date: June 19, 2014
    Applicant: Biomet Manufacturing Corporation
    Inventors: Joshua R. PORTER, Troy W. Hershberger, Aaron P. Smith
  • Patent number: 8696586
    Abstract: A method and device for measuring blood flow in the bone after a fracture, wherein a hole is drilled into the bone. The method includes the steps of inserting the metal sleeve of an osteoscope into the hole; inserting the optics of an osteoscope into the metal sleeve and focused on the cavity created by the drill; filling the device and the cavity with a physiological solution such that the pressure of the solution is above the systolic blood pressure; decreasing the pressure of the solution while observing the cavity through the osteoscope, and recording the pressure in the system at the commencement of bleeding.
    Type: Grant
    Filed: May 5, 2008
    Date of Patent: April 15, 2014
    Inventor: Jozsef Nyarady
  • Patent number: 8663327
    Abstract: A seal for preventing a bodily fluid from penetrating an orthopedic implant comprising a tapered section adapted to conformingly mate to a stem of a first implant component, and a collar section extending from and circumferentially surrounding a portion of the tapered section, the collar section adapted to mate to a base of a second implant component such that the tapered section and collar section define an opening therethrough configured to receive the first implant component.
    Type: Grant
    Filed: February 6, 2012
    Date of Patent: March 4, 2014
    Assignee: Biomet Manufacturing, LLC
    Inventors: Mukesh Kumar, Robert M. Ronk, Daniel E. Williamson
  • Patent number: 8603092
    Abstract: A bone repairing kit including a drilling device, a pushing device, a clamping member and a hole saw is provided. An end of a tube body of the drilling device is a knife portion. When the tube body rotates with respect to a femur, a bone column is cut by the knife portion and located in the tube body. The pushing device includes a hollow tube and a push bar. The hollow tube is for receiving the tube body. The push bar is for touching and pushing the bone column in the tube body. The clamping member is for clamping the bone column. The hole saw includes a receiving body and cutting knives. The receiving body has a recess for receiving an end of the bone column. The cutting knives surrounding on an inner wall of the recess are for cutting an edge of the end of the bone column.
    Type: Grant
    Filed: July 6, 2010
    Date of Patent: December 10, 2013
    Assignee: Industrial Technology Research Institute
    Inventors: Chun-Jen Liao, Ching-Chuan Jiang, Sung-Ching Chen, Pei-Chi Hsu, Shih-Jui Han
  • Publication number: 20130325132
    Abstract: A trial instrument assembly for use in a surgical procedure to replace an orthopaedic joint includes a trial implant having a stem portion for fitting within a prepared cavity in the patient's bone. The stem portion defines a stem axis. A neck portion is connected to the stem portion to protrude from the cavity when the stem portion is within the cavity. The assembly includes a plane guide that extends from the neck portion in a plane that is selected from (i) a plane perpendicular to the stem axis, and (ii) a plane parallel to the stem axis, for use in determining the location of the trial implant relative to an anatomical feature in a direction measured along the stem axis or perpendicular to the stem axis, respectively.
    Type: Application
    Filed: May 30, 2012
    Publication date: December 5, 2013
    Applicant: DEPUY (IRELAND)
    Inventors: CAROLE REIGNIER, LAURENT ZANCHIN
  • Publication number: 20130304225
    Abstract: A prosthetic femoral component comprising: (a) a femoral shaft; (b) a femoral neck operatively coupled to the femoral shaft; and, (c) a femoral ball operatively coupled to the femoral shaft, where a neck axis extending longitudinally through the femoral neck is angled at no greater than thirty-five degrees with respect to a femoral shaft axis extending longitudinally through the femoral shaft.
    Type: Application
    Filed: May 8, 2012
    Publication date: November 14, 2013
    Inventor: Richard D. Komistek
  • Patent number: 8535387
    Abstract: A method for preparing a femoral neck for receiving a neck implant includes obtaining image data of a proximal femoral bone and femoral neck of a patient by a medical imaging method and constructing a three-dimensional image model of the proximal femoral bone and neck of the patient using the image data. The method further includes identifying a three-dimensional cortical boundary surface at an interface between cortical and cancellous bone of the patient using the image model. A patient-specific broach having a three-dimensional cutting surface closely matching and complementary to the cortical boundary surface of the patient using the image model is designed and manufactured.
    Type: Grant
    Filed: March 7, 2011
    Date of Patent: September 17, 2013
    Assignee: Biomet Manufacturing, LLC
    Inventors: Jason D. Meridew, John R. White, Robert Metzger
  • Patent number: 8480756
    Abstract: Orthopaedic implants, orthopaedic implant sets, and/or methods for making the same. Aspects and embodiments of the present invention may include orthopaedic implants having an elongated insertion region including proximal, distal, and transition portions, wherein at least portions of at least one face each of the proximal and transition portions are defined by spaced apart constant radii of curvature. The same or other aspects and embodiments may include sets of orthopaedic implants in which proximal portions of the implants grow at different rates than distal portions of the implants. The same or other aspects and embodiments may include methods for making implants and/or sets of implants by studying the geometries of differently sized bony anatomies.
    Type: Grant
    Filed: May 24, 2010
    Date of Patent: July 9, 2013
    Assignee: Smith & Nephew, Inc.
    Inventors: Phillip Frederick, David C. Kelman, Vince Shotton
  • Patent number: 8470049
    Abstract: A femoral prosthesis. The femoral prosthesis includes an implant body having a proximal end and a distal end and a shoulder at the proximal end, the shoulder being structured and dimensioned for a tight press fit into the neck of a femur. The implant body includes a trunk at the distal end, the trunk having a wedge formed by a tapered portion extending in the direction of the distal end of the implant body. The implant body also includes a medial column extending from the shoulder toward the distal end and a lateral column extending from the shoulder toward the distal end. The wedge, the medial column, and the lateral column to provide multi-planar stability for the implant body and surface area for fixation of the implant body.
    Type: Grant
    Filed: December 23, 2010
    Date of Patent: June 25, 2013
    Assignee: Concept, Design and Development, LLC
    Inventors: Bradley Walter, Declan Brazil, Timothy McTighe
  • Patent number: 8398719
    Abstract: A femoral prosthesis. The femoral prosthesis includes an implant body having a proximal end and a distal end and a shoulder at the proximal end, the shoulder being structured and dimensioned for a tight press fit into the neck of a femur. The implant body includes a trunk at the distal end, the trunk having a wedge formed by a tapered portion extending in the direction of the distal end of the implant body. The implant body also includes a medial column extending from the shoulder toward the distal end and a lateral column extending from the shoulder toward the distal end. The wedge, the medial column, and the lateral column to provide multi-planar stability for the implant body and surface area for fixation of the implant body.
    Type: Grant
    Filed: December 23, 2010
    Date of Patent: March 19, 2013
    Assignee: Concept, Design and Development, LLC
    Inventors: Bradley Walter, Declan Brazil, Timothy McTighe
  • Patent number: 8357204
    Abstract: A set of mobile necks for inserting into the stem (2) of a hip prosthesis, in which the mobile necks are produced with different inclinations and lengths in such a way that their free ends (3i), when inserted in the stem, terminate at nine mutually equidistant points (Pi) arranged in three parallel horizontal rows (R0) in such a way that the lines joining the outermost points delineate a square (Q), the length of whose sides is approximately 15 mm, the diagonal (D) of this square coinciding with the axis (H-H) of a mobile neck (1) set at a neutral inclination, that is neither varus nor valgus, with respect to a plane (ss) essentially perpendicular to the axis of the abovementioned stem (2).
    Type: Grant
    Filed: March 9, 2010
    Date of Patent: January 22, 2013
    Assignee: Adler Ortho S.r.l.
    Inventor: Sheila Ragbir
  • Publication number: 20120253469
    Abstract: A surgical instrument is disclosed that facilitates the implantation of one of a number of differently sized or differently configured hip stem prostheses into a proximal end of a femur while also providing a surgeon with a substantial amount of rotational control over the prosthesis during the implantation. A suitable hip stem prosthesis is selected from a family of hip stem prostheses of varying sizes and dimensions. The surgical instrument attaches to the selected hip stem prosthesis via first and second spaced engagement portions such that the instrument is operable to exert rotational control over the selected hip stem prosthesis. The first engagement portion is an impaction portion configured to engage a corresponding impaction feature on a proximal body portion of the hip stem prosthesis. The second engagement portion is an adjustable clamping portion configured to clampingly receive the neck of the hip stem prosthesis, regardless of the prosthesis size.
    Type: Application
    Filed: June 30, 2011
    Publication date: October 4, 2012
    Applicant: ZIMMER, INC.
    Inventor: James S. Collins
  • Patent number: 8252061
    Abstract: A femoral stem including a stem member having a distal part of the stem member which is inserted in a medullary cavity of a femur and fixed therein and a proximal part of the stem member which has a neck for fixing an artificial head and is positioned at a proximal end of the distal part. The distal part and the proximal part are integrated or separable. Also, a plate fixing portion is detachably attached at a top of the proximal part, and a greater trochanter plate is provided for depressing the greater trochanter. The greater trochanter is fixed to the plate fixing portion at a certain angle or is fixed to the plate fixing portion so as to adjust an angle of the trochanter plate.
    Type: Grant
    Filed: October 26, 2006
    Date of Patent: August 28, 2012
    Assignees: Japan Medical Materials Corporation
    Inventors: Hiroshi Mikami, Sumihiko Maeno
  • Patent number: 8221504
    Abstract: A method of preparing an implant for bone in-growth comprising: providing a metal implant body, the metal implant body having a metal load bearing layer on an outer surface, the metal load bearing layer having a plurality of pores therein, the pores configured to promote bone in-growth into the load bearing layer; providing calcium sulfate hemi-hydrate; providing a diluent; mixing the calcium sulfate hemi-hydrate and the diluent to form a calcium sulfate paste; applying the calcium sulfate paste to the load bearing layer such that the calcium paste substantially impregnates at least a portion of the pores and forms an excess layer of the calcium sulfate paste on an outer surface of the load bearing layer; and wiping the calcium sulfate paste to remove the excess layer and thereby expose the outer surface of the load bearing layer while leaving the calcium sulfate paste impregnated in the pores.
    Type: Grant
    Filed: February 23, 2005
    Date of Patent: July 17, 2012
    Assignee: Wright Medical Technology, Inc.
    Inventors: Kelly C. Richelsoph, Linda Morris, Jantzen A. Cole
  • Publication number: 20120143346
    Abstract: A kit of modular prosthetic hip components includes a first neck having a coupling element thereon. First and second hip stems each have a coupling element at a proximal end thereof for connecting to the coupling element of the first neck. The first and second hip stems have a progressively larger medial-lateral dimension in a proximal portion thereof. The coupling element on each of the first and second hip stems is located at a different medial-lateral location thereon with the coupling element located more medially and proximally on the second stem than the first stem. The first neck forms an identical first neck angle with a proximal-distal axis of the respective first and second stems. The coupling elements on the first and second stems locate a head mounted on the first neck in the same proximal-distal location but a different medial-lateral location with respect to an acetabulum.
    Type: Application
    Filed: December 1, 2010
    Publication date: June 7, 2012
    Applicant: HOWMEDICA OSTEONICS CORP.
    Inventors: Tracy Rickels, William Huffnagle
  • Publication number: 20120123553
    Abstract: Disclosed are embodiments of an improved joint prosthesis that can provide the option to improve initial stability without removing the implant or altering the preparation. Embodiments of improved joint implant components can comprise one or more expandable, hollow segmented posts. Methods of implant fixation are also disclosed. Disclosed methods can provide the opportunity for establishing initial biologic fixation (bone ingrowth), and can also provide an adjunct fixation through injecting cement down the center of the post if initial stability is not achieved or is questionable.
    Type: Application
    Filed: November 11, 2010
    Publication date: May 17, 2012
    Inventors: Christopher G. Sidebotham, Gregory Thomas Van Der Meulen
  • Patent number: 8137486
    Abstract: A method for arthroplasty includes using a self-locking prosthesis that has a member structured to transfer a load produced by the weight of a patient to a bone. An expandable bone-locking portion that is integral to the member includes a shape-memory material and expands to produce a locking force. A portion of the bone is removed to form an aperture in the bone. The bone-locking portion is inserted into the aperture, and a temperature increase causes a change from a contracted state to an expanded state resulting in expansion of the bone-locking portion so as to contact the inner surface. The expanding is sufficient to create a locking force at the junction between the inner surface and the bone-locking portion of the prosthesis and the majority of the locking force is applied at or above the metaphysis. The length/width ration of the prosthesis may be less than or equal to 5. The resulting reconstructed long-bone may have improved primary and long-term stability.
    Type: Grant
    Filed: April 21, 2011
    Date of Patent: March 20, 2012
    Assignee: MX Orthopedics, Corp.
    Inventor: Matthew V. Fonte
  • Publication number: 20120010722
    Abstract: A femoral prosthesis. The femoral prosthesis includes an implant body having a proximal end and a distal end and a shoulder at the proximal end, the shoulder being structured and dimensioned for a tight press fit into the neck of a femur. The implant body includes a trunk at the distal end, the trunk having a wedge formed by a tapered portion extending in the direction of the distal end of the implant body. The implant body also includes a medial column extending from the shoulder toward the distal end and a lateral column extending from the shoulder toward the distal end. The wedge, the medial column, and the lateral column to provide multi-planar stability for the implant body and surface area for fixation of the implant body.
    Type: Application
    Filed: December 23, 2010
    Publication date: January 12, 2012
    Applicant: CONCEPT, DESIGN AND DEVELOPMENT, LLC
    Inventors: Bradley Walter, Declan Brazil, Timothy McTighe
  • Publication number: 20120010723
    Abstract: A femoral prosthesis. The femoral prosthesis includes an implant body having a proximal end and a distal end and a shoulder at the proximal end, the shoulder being structured and dimensioned for a tight press fit into the neck of a femur. The implant body includes a trunk at the distal end, the trunk having a wedge formed by a tapered portion extending in the direction of the distal end of the implant body. The implant body also includes a medial column extending from the shoulder toward the distal end and a lateral column extending from the shoulder toward the distal end. The wedge, the medial column, and the lateral column to provide multi-planar stability for the implant body and surface area for fixation of the implant body.
    Type: Application
    Filed: December 23, 2010
    Publication date: January 12, 2012
    Applicant: CONCEPT, DESIGN AND DEVELOPMENT, LLC
    Inventors: Bradley Walter, Declan Brazil, Timothy McTighe
  • Patent number: 8066775
    Abstract: A joint implant, includes a neck and a blade extending along a longitudinal axis and connected to the neck to form a blade plane. A plurality of bores is located in the blade, each of the bores having a central axis, the axes being oriented so that none project at the same angle relative to the blade plane.
    Type: Grant
    Filed: June 12, 2009
    Date of Patent: November 29, 2011
    Inventor: George Branovacki
  • Publication number: 20110251697
    Abstract: A femoral hip prosthesis has a body having a body lateral face, a body medial face, a body front face and a body rear face. A stem extends longitudinally from a lower end of the body along a central stem axis. A neck extends from an upper end of the body along a central neck axis inclined at an obtuse angle to the central stem axis. The body lateral face is provided with a series of longitudinally spaced lateral face teeth transversely extending between the body front face and body rear face. Each of the lateral face teeth has an upper face inclined with respect to an adjacent tangent of the body lateral face by between 60 and 120 degrees.
    Type: Application
    Filed: September 4, 2009
    Publication date: October 13, 2011
    Inventors: Wui Chung, Michael Neil, Rami Sorial, Craig Waller, Michael Ribot, Stephen Banks
  • Publication number: 20110218644
    Abstract: A drug delivery and diagnostic system can include an orthopedic implant having an outer attachment surface. A conduit can be coupled to the outer attachment surface. The conduit can have an inlet and a plurality of perforations formed along a length thereof. The conduit can be adapted to pass fluid between the inlet and the perforations. A subcutaneous port can be fluidly coupled to the inlet and be adapted to communicate fluid through the inlet, along the conduit and out of the perforations around and along the outer attachment surface of the orthopedic implant.
    Type: Application
    Filed: March 3, 2011
    Publication date: September 8, 2011
    Applicant: Biomet Manufacturing Corp.
    Inventors: Jason Meridew, Mukesh Kumar, Tayler E. Kreider
  • Publication number: 20110166668
    Abstract: Prosthetic hip stems for use in prosthetic hip joints and, in particular, provides prosthetic hip stems that are designed to achieve more optimized outcomes with certain types of patient anatomy, such as the anatomy of female patients and/or patients having osteoporosis. Each hip stem in a family or set of hip stems has diaphyseal width, metaphyseal width, offset, and head height dimensions. In a set of hip stems of increasing nominal size, the diaphyseal width dimension increases substantially non-proportionally to the corresponding increase of the metaphyseal width, offset, and head height dimensions, thereby providing a family or set of hip stems that is particularly adapted for patients having osteoporosis, in which the cortical bone of the diaphysis of the femur becomes thinner with progression of the osteoporosis.
    Type: Application
    Filed: March 17, 2011
    Publication date: July 7, 2011
    Applicant: ZIMMER, INC.
    Inventors: Dean M.J. Acker, Stephen H. Hoag, Danielle L. Whitlock, Wayne G. Paprosky
  • Patent number: 7951205
    Abstract: A system and method for trialing a modular hip replacement system permits evaluation and replication of the anatomic anteversion rotational angle of the femur. In one embodiment, a femoral hip implant kit includes at least one distal implant and a plurality of femoral heads, each of the plurality of femoral heads having a diameter different from the diameter of the other of the plurality of femoral heads. The kit includes a proximal trial housing with a bore within the housing, the bore configured to receive a portion of the distal implant, a collet located within the bore, the collet including an outer wall portion extending between a top surface portion and a bottom surface portion, a collapsing member for engaging the portion of the distal implant and for forcing the top surface portion of the collet toward the bottom surface portion of the collet along a first axis.
    Type: Grant
    Filed: September 2, 2009
    Date of Patent: May 31, 2011
    Assignee: DePuy Products, Inc.
    Inventors: Larry McCleary, Jonathan Carr, Joel Rhoades, David Daniels
  • Publication number: 20110125285
    Abstract: A set of mobile necks for inserting into the stem (2) of a hip prosthesis, in which the mobile necks are produced with different inclinations and lengths in such a way that their free ends (3i), when inserted in the stem, terminate at nine mutually equidistant points (Pi) arranged in three parallel horizontal rows (R0) in such a way that the lines joining the outermost points delineate a square (Q), the length of whose sides is approximately 15 mm, the diagonal (D) of this square coinciding with the axis (H-H) of a mobile neck (1) set at a neutral inclination, that is neither varus nor valgus, with respect to a plane (ss) essentially perpendicular to the axis of the above-mentioned stem (2).
    Type: Application
    Filed: March 9, 2010
    Publication date: May 26, 2011
    Applicant: MARIASAL INVESTMENT N.V.
    Inventor: Sheila Ragbir
  • Patent number: 7947135
    Abstract: A method for arthroplasty includes using a self-locking prosthesis that has a member structured to transfer a load produced by the weight of a patient to a bone. An expandable bone-locking portion that is integral to the member includes a shape-memory material and expands to produce a locking force. A portion of the bone is removed to form an aperture in the bone. The bone-locking portion is inserted into the aperture, and a temperature increase causes a change from a contracted state to an expanded state resulting in expansion of the bone-locking portion so as to contact the inner surface. The expanding is sufficient to create a locking force at the junction between the inner surface and the bone-locking portion of the prosthesis and the majority of the locking force is applied at or above the metaphysis. The length/width ration of the prosthesis may be less than or equal to 5. The resulting reconstructed long-bone may have improved primary and long-term stability.
    Type: Grant
    Filed: April 16, 2009
    Date of Patent: May 24, 2011
    Assignee: MX Orthopedics Corp.
    Inventor: Matthew V. Fonte
  • Publication number: 20110077747
    Abstract: A prosthesis comprising an elongated stem for disposition within a cavity formed in a bone, the stem comprising a longitudinal axis and being configured for incremental controlled expansion laterally of the longitudinal axis, whereby to secure the prosthesis within the cavity by means of a press-fit with the surrounding bone.
    Type: Application
    Filed: August 23, 2010
    Publication date: March 31, 2011
    Inventor: David S. Geller
  • Patent number: 7914585
    Abstract: A hip prosthesis includes a straight shaft which is to be inserted into the femur, the straight shaft including a proximal part that is configured to be inserted in the metaphyseal region of the femur. The proximal part has, on each of its front and rear faces, at least one projecting fin with a steep medial flank that deviates at least over part of its length away from the longitudinal direction of the shaft. At its top the proximal part is inclined toward the femoral neck. In this way, when the shaft is driven into the bone, the bone substance surrounding the fin is compacted and is able to absorb greater forces. The height of the fin decreases from its medial flank toward its lateral edge.
    Type: Grant
    Filed: January 14, 2004
    Date of Patent: March 29, 2011
    Assignee: Waldemar Link GmbH & Co. KG
    Inventor: Arnold Keller
  • Patent number: 7867282
    Abstract: A modular implant system includes a set of anatomically-designed diaphyseal fitting and filling modular implant components and adapters for connection to another implant component such as a modular articular component, a segmental component or an intercalary component. The other end of each diaphyseal component is a tapered porous surface. The tapered porous surface is received with a tapered bore in the bone diaphysis that is prepared to match the size and shape of the tapered porous surface. The diaphyseal implant is easy to insert and remove, does not bind before fully seating, and is designed to prevent stress shielding. The diaphyseal sleeve eliminates the long lever arm created when fixation occurs only at the tip of the stem, and should therefore eliminate related stem loosening.
    Type: Grant
    Filed: December 14, 2005
    Date of Patent: January 11, 2011
    Assignee: Depuy Products, Inc.
    Inventors: Robert K. Heck, Stephen A. Hazebrouck