HALLETT HOLMES MATHEWS, M.D.
Medical Practice at Parham Rd, Richmond, VA

6206826, Mar 27, 2001

Jun 18, 1999

9/336191

Hallett Mathews - Richmond VA
Bradley T. Estes - Memphis TN
Eddie Ray - Cordova TN
Mingyan Liu - Bourg-la-Reine, FR

SDGI Holdings, Inc. - Wilmington DE

A61B17/02

600210

A percutaneous surgical system includes a plurality of tissue retractors configured to maintain a working space within soft tissue. The tissue retractors include a prong on their inner surfaces for engaging a ring member. The ring member maintains the position of the tissue retractors while also defining a number of channels inside the ring member. In one embodiment, the ring member includes concentric inner and outer walls connected by support walls. The inner wall defines an inner bore for supporting a working channel sleeve for the introduction of working instruments. A plurality of outer channels are defined between the inner, outer and support walls for the introduction of ancillary instruments to the surgical site. A manipulation tool is also provided that engages each tissue retractor for positioning the retractor within the patient.

5171279, Dec 15, 1992

Mar 17, 1992

7/852577

Hallett H. Mathews - Richmond VA

Danek Medical - Memphis TN

A61F 244

623 17

A method for internal fixation of vertebra of the spine to facilitate graft fusion includes steps for excising the nucleus of an affected disc, preparing a bone graft, instrumenting the vertebrae for fixation, and introducing the bone graft into the resected nuclear space. Disc resection is conducted through two portals through the annulus, with one portal supporting resection instruments and the other supporting a viewing device. The fixation hardware is inserted through small incisions aligned with each pedicle to be instrumented. The hardware includes bone screws, fixation plates, engagement nuts, and linking members. In an important aspect of the method, the fixation plates, engagement nuts and linking members are supported suprafascially but subcutaneously so that the fascia and muscle tissue are not damaged. The bone screw is configured to support the fixation hardware above the fascia. In a further aspect of the invention, a three component dilator system is provided for use during the bone screw implantation steps of the method.

5569248, Oct 29, 1996

May 9, 1995

8/437523

Hallett H. Mathews - Richmond VA

Danek Medical, Inc. - Memphis TN

A61F 504

606 61

A system and method for internal fixation of vertbra of the spine to facilitate graft fusion is disclosed which minimizes the degee of trauma and the amount of surgical invasion. In one aspect the system includes fixation hardware which is inserted through small incisions aligned with each pedicle to be instrumented. The hardware includes bone screws, fixation plates, engagement nuts, and linking members. In an important feature of the hardware, the fixation plates, engagement nuts and linking members are supported suprafascially but subcutaneously so that the fascia and muscle tissue are not damaged, by a bone screw which includes an elongated smooth shank intermediate bone engaging threads and machine threads that is configured to support the fixation hardware above the fascia.

5496322, Mar 5, 1996

Jul 22, 1994

8/279222

Hallett H. Mathews - Richmond VA

Danek Medical Inc. - Memphis TN

A61H 700, A61F 244

606 61

A method for internal fixation of vertebra of the spine to facilitate graft fusion includes steps for excising the nucleus of an affected disc, preparing a bone graft, instrumenting the vertebrae for fixation, and introducing the bone graft into the resected nuclear space. Disc resection is conducted through two portals through the annulus, with one portal supporting resection instruments and the other supporting a viewing device. The fixation hardware is inserted through small incisions aligned with each pedicle to be instrumented. The hardware includes bone screws, fixation plates, engagement nuts, and linking members. In an important aspect of the method, the fixation plates, engagement nuts and linking members are supported suprafascially but subcutaneously so that the fascia and muscle tissue are not damaged. The bone screw is configured to support the fixation hardware above the fascia. In a further aspect of the invention, a three component dilator system is provided for use during the bone screw implantation steps of the method.

5357983, Oct 25, 1994

Jan 4, 1993

8/000391

Hallett H. Mathews - Richmond VA

Danek Medical, Inc. - Memphis TN

A61B 1900, A61F 244, A61F 254

128898

A method for internal fixation of vertebra of the spine to facilitate graft fusion includes steps for excising the nucleus of an affected disc, preparing a bone graft, instrumenting the vertebrae for fixation, and introducing the bone graft into the resected nuclear space. Disc resection is conducted through two portals through the annulus, with one portal supporting resection instruments and the other supporting a viewing device. The fixation hardware is inserted through small incisions aligned with each pedicle to be instrumented. The hardware includes bone screws, fixation plates, engagement nuts, and linking members. In an important aspect of the method, the fixation plates, engagement nuts and linking members are supported suprafascially but subcutaneously so that the fascia and muscle tissue are not damaged. The bone screw is configured to support the fixation hardware above the fascia. In a further aspect of the invention, a three component dilator system is provided for use during the bone screw implantation steps of the method.

2005003, Feb 17, 2005

Sep 2, 2004

10/933155

Hallett Mathews - Richmond VA, US

A61F005/04, A61B017/56, A61F002/30

606061000, 606060000, 606053000

A method for internal fixation of vertebra of the spine to facilitate graft fusion includes steps for excising the nucleus of an affected disc, preparing a bone graft, instrumenting the vertebrae for fixation, and introducing the bone graft into the resected nuclear space. Disc resection is conducted through two portals through the annulus, with one portal supporting resection instruments and the other supporting a viewing device. The fixation hardware is inserted through small incisions aligned with each pedicle to be instrumented. The hardware includes bone screws, fixation plates, engagement nuts, and linking members. In an important aspect of the method, the fixation plates, engagement nuts and linking members are supported suprafascially but subcutaneously so that the fascia and muscle tissue are not damaged. The bone screw is configured to support the fixation hardware above the fascia. In a further aspect of the invention, a three component dilator system is provided for use during the bone screw implantation steps of the method.

5728097, Mar 17, 1998

Jul 9, 1996

8/677135

Hallett H. Mathews - Richmond VA

SDGI Holding, Inc. - Memphis TN

A61B 1758

606 61

A method for internal fixation of vertebra of the spine to facilitate graft fusion includes steps for excising the nucleus of an affected disc, preparing a bone graft, instrumenting the vertebrae for fixation, and introducing the bone graft into the resected nuclear space. Disc resection is conducted through two portals through the annulus, with one portal supporting resection instruments and the other supporting a viewing device. The fixation hardware is inserted through small incisions aligned with each pedicle to be instrumented. The hardware includes bone screws, fixation plates, engagement nuts, and linking members. In an important aspect of the method, the fixation plates, engagement nuts and linking members are supported suprafascially but subcutaneously so that the fascia and muscle tissue are not damaged. The bone screw is configured to support the fixation hardware above the fascia. In a further aspect of the invention, a three component dilator system is provided for use during the bone screw implantation steps of the method.

6033406, Mar 7, 2000

Mar 17, 1998

9/042910

Hallett H. Mathews - Richmond VA

SDGI Holdings, Inc. - Wilmington DE

A61B 1758

606 61

A method for internal fixation of vertebra of the spine to facilitate graft fusion includes steps for excising the nucleus of an affected disc, preparing a bone graft, instrumenting the vertebrae for fixation, and introducing the bone graft into the resected nuclear space. Disc resection is conducted through two portals through the annulus, with one portal supporting resection instruments and the other supporting a viewing device. The fixation hardware is inserted through small incisions aligned with each pedicle to be instrumented. The hardware includes bone screws, fixation plates, engagement nuts, and linking members. In an important aspect of the method, the fixation plates, engagement nuts and linking members are supported suprafascially but subcutaneously so that the fascia and muscle tissue are not damaged. The bone screw is configured to support the fixation hardware above the fascia. In a further aspect of the invention, a three component dilator system is provided for use during the bone screw implantation steps of the method.

7547308, Jun 16, 2009

Jan 30, 2004

10/768354

Rudolf Bertagnoli - Vienna, AT
Tai Friesem - Ingleby Barwick, GB
Jean-Charles LeHuec - Pessac, FR
Hallett H. Mathews - Richmond VA, US
Lukas Eisermann - Memphis TN, US
Mingyan Liu - Bourg-la-Reine, FR
Loic Josse - Palaja, FR
Jeffrey Zhang - Collierville TN, US

Warsaw Orthopedic, Inc. - Warsaw IN

A61B 17/58

606 90

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.