Patents by Inventor Mingyan Liu

Mingyan Liu 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).

  • Publication number: 20060129160
    Abstract: A disc preparation system includes an oscillating rasp for preparation of vertebral endplates and a central reamer for reaming a pair of kidney-shaped grooves into the vertebral endplate. The oscillating rasp is powered by a rotary power source. A linkage assembly is coupled to the rotary power source to convert the rotary motion into a reciprocating motion. A pair of rasps plates, which are linked to the linkage assembly, linearly reciprocate in opposite directions in response to the reciprocating motion of the linkage assembly. In one form, the central reamer includes a pair of cutting elements that are coupled to the rotary power source in order to rotate in response to rotational movement from the rotary power source. In another form, the central reamer includes a single cutting element coupled to an angled reamer handle and a reamer guide.
    Type: Application
    Filed: September 12, 2005
    Publication date: June 15, 2006
    Applicant: SDGI Holdings, Inc.
    Inventors: Mingyan Liu, Loic Josse
  • Publication number: 20060116688
    Abstract: A method and instrumentation particularly adapted for disc space preparation from an anterior approach to the spine. In one aspect, an expandable template is provided having guides to guide a cutting device for bilateral formation of openings in the disc space. In another aspect, an improved guide member is provided for guiding a cutting tool. Still further, the invention provides an improved double barrel guide sleeve with a central distraction extension and lateral non-distracting extensions. Optionally, the guide sleeve includes windows and covers to selectively cover the windows. An improved reamer with an internal chamber and optional modular coupling is also provided. A depth stop is provided to selectively engage a tool shaft and a guide sleeve to control tool penetration into the disc space. A method of using the disclosed instruments is also provided.
    Type: Application
    Filed: January 5, 2006
    Publication date: June 1, 2006
    Inventors: Lawrence Boyd, Eddie Ray, Bradley Estes, Mingyan Liu
  • Publication number: 20060089714
    Abstract: An intervertebral implant has two-plates intended to come into contact with a patient's vertebral end-plates. One of the plates has a cut-out delineating webs converging toward a zone where the plates are connected to one another.
    Type: Application
    Filed: November 17, 2004
    Publication date: April 27, 2006
    Applicant: SDGI Holdings, Inc.
    Inventors: Mingyan Liu, Loic Josse, Jean-Charles LeHuec, Philippe Maxy
  • Publication number: 20060074420
    Abstract: A plating system for stabilization of a bony segment includes a plate engageable to at least first and second bony elements. For spinal stabilization, the plate is attached at least to first and second vertebrae with at least one bone fastener in each vertebra. Retaining members are attachable to the plate to prevent the bone fasteners from backing out of the plate. One retaining member is a variable retaining member that allows the bone fasteners to toggle in the plate without interference. A second retaining member is a fixed retaining member that fixes the bone fasteners relative to the plate.
    Type: Application
    Filed: November 18, 2005
    Publication date: April 6, 2006
    Inventors: Jean-Charles LeHuec, Curtis Dickman, Mingyan Liu, Loic Josse, Eric Lange
  • Patent number: 6989012
    Abstract: A plating system for stabilization of a bony segment includes a plate engageable to at least first and second bony elements. For spinal stabilization, the plate is attached at least to first and second vertebrae with at least one bone fastener in each vertebra. Retaining members are attachable to the plate to prevent the bone fasteners from backing out of the plate. One retaining member is a variable retaining member that allows the bone fasteners to toggle in the plate without interference. A second retaining member is a fixed retaining member that fixes the bone fasteners relative to the plate.
    Type: Grant
    Filed: August 15, 2002
    Date of Patent: January 24, 2006
    Assignee: SDGI Holdings, Inc.
    Inventors: Jean-Charles LeHuec, Curtis A. Dickman, Mingyan Liu, Loic Josse, Eric C. Lange
  • Publication number: 20050261681
    Abstract: This invention relates to implants formed from donor bone for use in lumbar interbody fusion procedures and instruments for performing such procedures. The implants are formed to include a concave surface formed from a portion of the medullary canal of a long bone. The concaved surface defines a recess in the implant that serves as a depot for osteogenic material. Specific instruments for inserting the implants prepared according to this invention and for preparing the intervertebral space to receive the implants are also provided.
    Type: Application
    Filed: May 30, 2001
    Publication date: November 24, 2005
    Inventors: Charles Branch, Mingyan Liu, Lawrence Boyd, Loic Josse
  • Publication number: 20050154396
    Abstract: Methods and instrumentation for surgical procedures relating to preparation of vertebral bodies and a disc space for insertion of spinal implants is disclosed. One instrument is a shim having a blade and a shaft having a first end connected with the blade. The blade is inserted into a distracted disc space to maintain distraction during subsequent procedures. Another instrument is a driver for driving the blade of the shim into the distracted disc space. Various methods contemplate the use of these instruments to maintain disc space distraction during disc space preparation for receiving an implant.
    Type: Application
    Filed: January 4, 2005
    Publication date: July 14, 2005
    Inventors: Kevin Foley, Mingyan Liu
  • Publication number: 20050119747
    Abstract: An intersomatic implant (1a, 1b) maintains bone graft material in a receiving cavity formed in a disc in order to obtain intervertebral fusion. The implant (1a, 1b) includes of a plurality of parts provided with means for in situ connection of two consecutive parts. Instruments (33) are used to connect these implants (1a, 1b) and a tool assists in introducing these implants (1a, 1b) into the cavity formed in the disc.
    Type: Application
    Filed: February 25, 2003
    Publication date: June 2, 2005
    Applicant: SDGI Holdings, Inc.
    Inventors: Daniele Fabris Monterumici, Rudolf Bertagnoli, Mingyan Liu, Loic Josse
  • Publication number: 20050113920
    Abstract: Laterally expanding vertebral spacer devices are provided for repairing damaged vertebral discs. The vertebral spacer devices maintain the height of a distracted vertebral disc space while providing stability to the spine. In one form of the invention, a vertebral spacer device is provided with a first arm movably coupled to a second arm. The first and second arms are laterally expandable from a first width for insertion into the disc space to a second width after insertion into the disc space. The first and second arms also define a cavity therebetween for placement of bone growth material.
    Type: Application
    Filed: November 30, 2004
    Publication date: May 26, 2005
    Inventors: Kevin Foley, Harald Ebner, Mingyan Liu, Charles Branch, Lawrence Boyd
  • Publication number: 20050113842
    Abstract: An instrument for separating adjacent vertebrae includes a handle assembly and a distal portion at a distal end of the handle assembly. The distal portion includes first and second members movable from an unexpanded configuration for insertion in the disc space toward an expanded configuration to separate the vertebrae. A cutting member of a cutting instrument can be guided by the instrument to prepare the vertebrae for engagement with an implant.
    Type: Application
    Filed: January 30, 2004
    Publication date: May 26, 2005
    Inventors: Rudolf Bertagnoli, Tai Friesem, Jean-Charles LeHuec, Hallett Mathews, Lukas Eisermann, Mingyan Liu, Loic Josse, Jeffrey Zhang
  • Patent number: 6884242
    Abstract: Systems and methods for stabilizing the spine are provided. For stabilizing the L5-S1 junction, the system includes a plate (7) that has a generally triangular shape with an upper node (8a) and a pair of lower nodes (9a, 10a). The upper node (8a) has a hole (8) through the plate (7) to receive a screw (11) for passage into the L5 vertebra. The lower nodes (9a, 10a) each include a hole (9,10) through the plate (7) to receive screws (12, 13) for passage into the S1 vertebra. The system further includes a plate (7) having a retaining element (32) for preventing backout of screws inserted through the plate (9). Instruments and methods for attaching the plate to the spinal column are also provided.
    Type: Grant
    Filed: October 25, 2002
    Date of Patent: April 26, 2005
    Assignee: Society de Fabrication de Materiel Orthopedique, S.A.
    Inventors: Jean-Charles LeHuec, Mingyan Liu, Loic Josse, Eric C. Lange, Curtis A. Dickman
  • Publication number: 20050065529
    Abstract: A hand-held instrument, with a rotary power input to a camshaft, has cam and follower arrangement to provide a reciprocating shaft output. A cutter is provided on the output shaft. In one example, rotating cam percussion is transmitted to the cutter by engaging the cutter with the tissue to be cut, and pushing the instrument forward toward the cutter. In another example, rotating cam percussion is transmitted to the cutter by engaging the cutter with the tissue to be cut, and pulling the instrument back toward the user while maintaining engagement of the cutter with the tissue. In both examples, the cutter remains in idle condition until an axially directed load, forward in the one example, or backward on the other example, is placed on the cutter by moving the instrument forward or backward, respectively, while the camshaft is rotating. A distractor with frame is used to spread and maintain space between vertebral bodies, enabling entrance of the cutter.
    Type: Application
    Filed: September 9, 2004
    Publication date: March 24, 2005
    Inventors: Mingyan Liu, Loic Josse
  • Patent number: 6855148
    Abstract: Methods and instrumentation for surgical procedures relating to preparation of vertebral bodies and a disc space for insertion of spinal implants is disclosed. One instrument is a shim having a blade and a shaft having a first end connected with the blade. The blade is inserted into a distracted disc space to maintain distraction during subsequent procedures. Another instrument is a driver for driving the blade of the shim into the distracted disc space. Various methods contemplate the use of these instruments to maintain disc space distraction during disc space preparation for receiving an implant.
    Type: Grant
    Filed: September 27, 2002
    Date of Patent: February 15, 2005
    Assignee: SDGI Holdings, Inc.
    Inventors: Kevin T. Foley, Mingyan Liu
  • Publication number: 20050027293
    Abstract: Systems and methods for stabilizing the spine are provided. For stabilizing the L5-S1 junction, the system includes a plate that has a generally triangular shape with an upper node and a pair of lower nodes. The upper node has a hole through the plate to receive a screw for passage into the L5 vertebra. The lower nodes each include a hole through the plate to receive screws for passage into the S1 vertebra. The system further includes a plate having a retaining element for preventing backout of screws inserted through the plate. Instruments and methods for attaching the plate to the spinal column are also provided.
    Type: Application
    Filed: August 6, 2004
    Publication date: February 3, 2005
    Inventors: Jean-Charles LeHuec, Mingyan Liu, Loic Josse
  • Patent number: 6833006
    Abstract: Laterally expanding vertebral spacer devices are provided for repairing damaged vertebral discs. The vertebral spacer devices maintain the height of a distracted vertebral disc space while providing stability to the spine. In one form of the invention, a vertebral spacer device is provided with a first arm movably coupled to a second arm. The first and second arms are laterally expandable from a first width for insertion into the disc space to a second width after insertion into the disc space. The first and second arms also define a cavity therebetween for placement of bone growth material.
    Type: Grant
    Filed: May 23, 2002
    Date of Patent: December 21, 2004
    Assignee: SDGI Holdings, Inc.
    Inventors: Kevin Foley, Harald Ebner, Mingyan Liu, Charles Branch, Lawrence M. Boyd
  • Patent number: 6830570
    Abstract: This invention relates to methods and instruments for performing disc space preparation and implant insertion from a unilateral approach to the spine through a posterior lateral opening to the disc space. The instruments include spreaders, distractors, reamers, scrapers, cutters, chisels, pushers and implant inserters. A surgical procedure is provided that allows bilateral support of the adjacent vertebrae with at least one interbody fusion device inserted into the disc space via a unilateral approach. Implants for insertion into the disc space are also provided.
    Type: Grant
    Filed: October 23, 2000
    Date of Patent: December 14, 2004
    Assignee: SDGI Holdings, Inc.
    Inventors: George Frey, Mingyan Liu, Loic Josse, Lawrence M. Boyd
  • Publication number: 20040249466
    Abstract: An expandable intervertebral device including a body extending generally along a longitudinal axis and including at least two branch portions coupled together adjacent an end portion of the body. The device further includes an expansion member positioned between the at least two branch portions with at least a portion of the expansion member arranged at an angular orientation relative to the longitudinal axis whereby a change in the angular orientation relative to the longitudinal axis urges the at least two branch portions apart to expand the body.
    Type: Application
    Filed: July 14, 2004
    Publication date: December 9, 2004
    Inventors: Mingyan Liu, Loic Josse
  • Publication number: 20040225366
    Abstract: A prosthetic device for anterior-oblique insertion into an intervertebral space is provided. The prosthetic device includes a first component having a first flange for engaging a first vertebra from an anterior-oblique approach, the first flange being angled relative to the longitudinal and transverse axes of the first component, and a second component having a second flange for engaging a second vertebra from an anterior-oblique approach, the second flange being angled relative to the longitudinal and transverse axes of the second component, and wherein the first and second components cooperate to permit articulating motion between the first and second components.
    Type: Application
    Filed: February 6, 2004
    Publication date: November 11, 2004
    Applicant: SDGI Holdings, Inc.
    Inventors: Lukas Eisermann, Tai Friesem, Jean-Charles LeHuec, Mingyan Liu, Jeffrey Zhang, Thomas Zdeblick, Hallet Matthews, Loic Josse
  • Publication number: 20040220581
    Abstract: This invention relates to methods and instruments for performing a surgical procedure in a disc space between adjacent vertebrae. The instruments include a distractor and a cutting instrument. In one embodiment the distractor includes a body portion and a pair of flanges extending along opposite sides of the body portion such that a slot is formed between the flanges and the body portion. The cutting instrument is positionable over the body portion and into the slots of the distractor so that the flanges are positioned between the cutting instrument and the adjacent tissue.
    Type: Application
    Filed: July 23, 2003
    Publication date: November 4, 2004
    Inventors: Kevin T. Foley, Jeffrey D. Moore, Bradley T. Estes, Mingyan Liu, Loic Josse
  • Publication number: 20040220567
    Abstract: An assembly for aligning a prosthetic device for insertion into an intervertebral space is provided. The assembly includes an alignment instrument, a first clamp assembly slidably engaged with the alignment instrument, a second clamp assembly slidably engaged with the first clamp assembly, and an implantation device slidably engaged with the second clamp assembly, the implantation device being adapted to retain a prosthetic device thereon.
    Type: Application
    Filed: February 6, 2004
    Publication date: November 4, 2004
    Applicant: SDGI Holdings, Inc.
    Inventors: Lukas Eisermann, Tai Friesem, Jean-Charles LeHuec, Hallet Matthews, Jeffrey Zhang, Thomas Zdeblick, Loic Josse, Mingyan Liu