Patents by Inventor Nicholas N. G. Dong

Nicholas N. G. Dong 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: 6475243
    Abstract: An acetabular cup assembly allows pre-operative or interoperative selection and securement of a bearing member within a shell member of the acetabular cup assembly, the bearing member being selected from a plurality of bearing members having different characteristics, including bearing characteristics, securement characteristics, position characteristics and orientation characteristics, so as to enable a surgeon to select those characteristics most appropriate to a particular patient, as determined by a pre-operative assessment or by an evaluation of conditions encountered at an implant site during the implant procedure, and to incorporate the desired characteristics into the acetabular cup assembly with ease and economy.
    Type: Grant
    Filed: September 19, 2000
    Date of Patent: November 5, 2002
    Assignee: Howmedica Osteonics Corp.
    Inventors: Michael B. Sheldon, Nicholas N. G. Dong
  • Patent number: 5769856
    Abstract: Apparatus and method for locating holes to be drilled in natural bone, such as a scapula at a site for a prosthetic implant component, such as a glenoid component to be affixed to the scapula for providing a bearing for a humeral head in a shoulder prosthesis, the apparatus and method including seating a guide block against the scapula at the site for the glenoid component, the guide block having an upper end and a lower end spaced in a longitudinal direction from the upper end, drilling a first hole in the scapula along a first transverse direction by guiding a drill through a first drill guide bore adjacent the upper end of the guide block and extending in the first transverse direction through the guide block, the guide block including a second drill guide bore adjacent the lower end of the guide block and extending in a second transverse direction through the guide block, inserting a locator pin into the first hole in the scapula, with the locator pin projecting from the guide block along one of the first
    Type: Grant
    Filed: June 24, 1996
    Date of Patent: June 23, 1998
    Assignee: Osteonics Corp.
    Inventors: Nicholas N. G. Dong, Peter J. Abitante
  • Patent number: 5702477
    Abstract: An acetabular shell is implanted at an acetabulum in a deficient pelvis to establish an effective acetabular site with increased support in posterior and superior directions for an acetabular bearing insert to be affixed in place in the acetabular shell for the reception of a femoral head of a femoral component of a prosthetic hip implant, the acetabular shell including a domed portion having a convex outer surface for engaging the acetabulum, a concave inner surface for reception of the bearing insert, the inner surface extending along a spherical contour up to a generally hemispherical extent, and a rim between the outer and inner surfaces, the rim being placed adjacent an equatorial location along the domed portion and including a superior segment, an inferior segment longitudinally opposite the superior segment, a posterior segment and an anterior segment laterally opposite the posterior segment, an anchoring plate integral with the domed portion adjacent the superior segment of the rim, and a supplementa
    Type: Grant
    Filed: May 9, 1996
    Date of Patent: December 30, 1997
    Assignee: Osteonics Corp.
    Inventors: William N. Capello, Nicholas N. G. Dong
  • Patent number: 5593448
    Abstract: Affixation of a glenoid component of a prosthetic shoulder implant is enhanced and forces exerted upon the glenoid component during service are managed by the location and orientation of affixation pegs on the glenoid component, and especially the location of a medially extending superior affixation peg closely adjacent the superior edge of the glenoid component, and the offset orientation of an inferior affixation peg, relative to the superior affixation peg, the glenoid component including intermediate affixation pegs extending medially and spaced from one another in the anterior-posterior direction intermediate the superior affixation peg and the inferior affixation peg.
    Type: Grant
    Filed: November 14, 1995
    Date of Patent: January 14, 1997
    Assignee: Osteonics Corp.
    Inventor: Nicholas N. G. Dong
  • Patent number: 5571198
    Abstract: An improvement in an acetabular cup component of a prosthetic hip implant in which an acetabular shell receives a bearing member within the interior of the acetabular shell and has at least one bone screw hole, the improvement enabling the interoperative selection of implanting the acetabular shell without the employment of a bone screw or with the employment of at least one bone screw for assisting securement of the acetabular shell within the natural bone at the implant site, the improvement including a plug for seating in the bone screw hole to close the bone screw hole, the plug including a fastener arrangement for engaging the acetabular shell to fasten the plug within the bone screw hole, and a sealing arrangement for engaging the acetabular shell essentially to seal the bone screw hole against the migration of debris from the bearing member through the bone screw hole, the fastener arrangement including an operator arrangement for being selectively operated from the interior of the acetabular shell to
    Type: Grant
    Filed: January 21, 1994
    Date of Patent: November 5, 1996
    Assignee: David A. Drucker
    Inventors: David A. Drucker, Robert G. Collins, Nicholas N. G. Dong
  • Patent number: 5282865
    Abstract: A modular humeral shoulder prosthesis for implant in a predetermined position in the natural humerus to replace the natural humeral head of a shoulder joint with a prosthetic implant has a humeral head component including a humeral head member with a spherical bearing surface of predetermined radius extending from an origin to the bearing surface, an undersurface extending in a first direction, an elongate post integral with and projecting in a given direction from the humeral head member, the given direction making a first acute angle with the first direction, and a post portion on the post, and a humeral stem component including a platform having an upper surface, a stem integral with and depending from the platform, the stem extending along a longitudinal axis for alignment generally longitudinally along the natural humerus, the upper surface extending in a second direction making a second acute angle with the longitudinal axis, and an elongate recess in the stem, the recess extending along the stem and in
    Type: Grant
    Filed: June 22, 1992
    Date of Patent: February 1, 1994
    Assignee: Osteonics Corp.
    Inventor: Nicholas N. G. Dong