Michael H Macmillan

US Patent:

20070173853, Jul 26, 2007

Filed:

Jan 10, 2007

Appl. No.:

11/621737

Inventors:

Michael MacMillan - Gainesville FL, US

International Classification:

A61F 5/00

US Classification:

606087000

Abstract:

Various embodiments of the present invention provide, for example, a system and method for centering a surgical tool about the spinous process or other bony structure. Certain embodiments of the present invention may guide the surgical tool along a posterior midline of the spine in order to divide the spinous process. Various embodiments of the present invention may also further provide a system and method for performing a minimally invasive laminectomy procedure via the midline approach described above that may thus reduce the trauma experienced by tissues surrounding the spine or other bony structure.

US Patent:

20090036746, Feb 5, 2009

Filed:

Aug 1, 2007

Appl. No.:

11/888566

Inventors:

Jonathan Blackwell - Cordova TN, US
Michael MacMillan - Gainesville FL, US
Richard Thomas Hackett - Memphis TN, US

International Classification:

A61B 1/32

US Classification:

600219, 600235

Abstract:

Instrumentation for retracting tissue comprising a retractor member including a sidewall defining an axial passage extending along a length thereof and a lateral opening in transverse communication with the passage. A pin member is disposed within the passage and includes a distal end portion positionable adjacent the distal end of the retractor member, with at least a portion of the pin member positioned adjacent and visible through the lateral opening. In another embodiment, the retractor member includes a sidewall having a main sidewall portion defining a first wall thickness, and an enlarged sidewall portion extending axially along a length of the sidewall and defining a second wall thickness greater than the first wall thickness, with the sidewall defining an axial passage extending through the enlarged sidewall portion. A pin member is disposed within the passage and includes a distal end portion positionable adjacent the distal end of the retractor member.

US Patent:

52424448, Sep 7, 1993

Filed:

Nov 4, 1991

Appl. No.:

7/787537

Inventors:

Michael MacMillan - Gainesville FL

Assignee:

University of Florida - Gainesville FL

International Classification:

A61B 1756

US Classification:

606 61

Abstract:

A method for percutaneously fixing and fusing the lumbosacral joint and a guide device for accurate placement of instrumentation to effect the fixation or fusion. The inventive method comprises placement of pins along bony canals leading bilateral of the spine from the pelvis to the S1 pedicles and then the vertebral body of L5.

US Patent:

49516558, Aug 28, 1990

Filed:

Mar 27, 1989

Appl. No.:

7/329278

Inventors:

Michael MacMillan - Gainesville FL
Christopher Schirmer - Gainesville FL

Assignee:

University of Florida - Gainesville FL

International Classification:

A61F 508

US Classification:

128 76R

Abstract:

A cervical spine orthosis is provided which comprises an upper body engaging member, such as a vest, a front and rear pair of rigid vest uprights, and a band encirculing the head of the wearer at the level of the wearer's mouth, the bank being securely fastened to the vest uprights, and carrying a maxillary bridge comprising a maxillary tooth splint adapted to engage the upper set of teeth of the wearer and a bridge member attached to and spanning the distance between the band and the maxillary tooth splint. The band further has attached thereto, two occipital support pads which are adapted to engage the neck of the wearer at the occipital bone region at the posterior base of the skull, the support pads being movable into an engaging position with the neck by use of threaded positioning screws. Improved immobilization and/or control of movement the cervical spine are provided.

US Patent:

50628500, Nov 5, 1991

Filed:

Jan 16, 1990

Appl. No.:

7/465419

Inventors:

Michael MacMillan - Gainesville FL
Regis Haid - San Antonio TX

Assignee:

University of Florida - Gainesville FL

International Classification:

A61F 244

US Classification:

623 17

Abstract:

A vertebral body prosthetic device for replacing a surgically removed natural vertebral body and a method for its fixation to thereby reconstruct a patient's spinal column. The inventive device generally comprises upper and lower endplates separated by a plurality of support columns or posts. The device is dimensioned to fit completely within the patient's vertebral column and is fixed using axially-oriented screws.

US Patent:

20210346064, Nov 11, 2021

Filed:

Sep 25, 2020

Appl. No.:

17/033671

Inventors:

Michael MacMillan - ST PETERSBURG FL, US
Raymond Cloutier - Alachua FL, US

International Classification:

A61B 17/70
A61B 34/30

Abstract:

The present invention provides for improved surgical methods for securely fix the L5 vertebrae to the S1 sacrum within the disc space for patients exhibiting a wide range of anatomies. The present invention has at least one advantage of providing practical and advantageous methods for accessing the spinal vertebrae to insert spinal implants in various manners that overcome the disadvantages of posterior, trans-sacro-iliac and anterior lateral approaches thereto and minimize surgical trauma to the patient. Thus the present invention provides for the unmet need for an improved method for performing spinal surgical procedures (e.g., spinal fusion and/or fixations) that can securely fix the L5 vertebrae to the S1 sacrum within the disc space for patients exhibiting a wide range of anatomies.

US Patent:

20200352611, Nov 12, 2020

Filed:

May 6, 2020

Appl. No.:

16/868488

Inventors:

- Alachua FL, US
Michael MacMillan - Gainesville FL, US

International Classification:

A61B 17/70

Abstract:

The present invention provides for an improved implant, and surgical methods for installing same, that can securely fix the L5 vertebrae to the S1 sacrum within the disc space for patients exhibiting a wide range of anatomies. The present invention has at least one advantage of providing practical and advantageous spinal implants and implantation systems, methods and tools for accessing the spinal vertebrae to insert spinal implants in various manners that overcome the disadvantages of posterior and anterior lateral approaches thereto and minimize surgical trauma to the patient. Thus the present invention provides for the unmet need for an improved implant for performing spinal surgical procedures (e.g., spinal fusion and/or fixations) that can securely fix the L5 vertebrae to the S1 sacrum within the disc space for patients exhibiting a wide range of anatomies.