Laurel L Rogers

US Patent:

20020143356, Oct 3, 2002

Filed:

Mar 30, 2001

Appl. No.:

09/823693

Inventors:

Laurel Rogers - North Attleboro MA, US
Ron Lancaster - Portage MI, US

International Classification:

A61B017/32

US Classification:

606/172000

Abstract:

A guard device with angled cranium guide that can be removably and replaceably attached to an existing craniotome for producing a stable bone flap system includes an elongate stem defining a longitudinal axis between a proximal end and distal end. The proximal end is adapted for attachment to the craniotome. A footplate extends from the distal end of the stem at an angle with respect to the longitudinal axis of the stem. The footplate is positioned adjacent to the cutting portion of the craniotome and prevents the cutting portion from penetrating too far into the skull. On one side of the stem between the proximal and distal ends is an angled cranium guide. The dura guard with its angled cranium guide enables the surgeon to rest the guide agains the cranium and the maintain the craniotome at a fixed angle to cut a bone flap at an angle.

US Patent:

57163588, Feb 10, 1998

Filed:

Dec 2, 1994

Appl. No.:

8/348607

Inventors:

Jorge A. Ochoa - Norton MA
Laurel Rogers - North Attleboro MA

Assignee:

Johnson & Johnson Professional, Inc. - Raynham MA

International Classification:

A61B 1768

US Classification:

606 62

Abstract:

A bone fixation device such as a screw, pin, staple, cable or anchor has a microtextured contact surface to enhance installation or gripping characteristics, preferably by providing directional or anisotropic engagement. A surface texture comprised of patterned microfeatures imparts a roughness or actual mechanical engagement that prevents loosening. In different embodiments the features resemble an array of microbumps or pyramids, or anisotropic features such as rasp teeth, shingles, or slanted cantilevered fiber/rods. The use of microbumps present a smaller surface area when moving, while providing full area contact after the surfaces have relaxed or decompressed; installation may be effected with low force, while high static or resting friction prevents disengagement. Features with directional asymmetry or angled suspension allow the textured surface to slide or deflect when the fixation device moves in one direction, while presenting a high resistance to torque or linear motion when moved in the other direction. Manufacturing is achieved with ion beams or directional treatment with energetic radiation, and regular arrays of the microfeatures may be produced as stationary surface growth phenomena without the use of pattern masks or mechanical contact.

US Patent:

58687475, Feb 9, 1999

Filed:

Sep 29, 1997

Appl. No.:

8/939558

Inventors:

Jorge A. Ochoa - Norton MA
Laurel Rogers - North Attleboro MA

Assignee:

Johnson & Johnson Professional, Inc. - Raynham MA

International Classification:

A61B 1756

US Classification:

606 72

Abstract:

A bone fixation device such as a screw, pin, staple, cable or anchor has a microtextured contact surface to enhance installation or gripping characteristics, preferably by providing directional or anisotropic engagement. A surface texture comprised of patterned microfeatures imparts a roughness or actual mechanical engagement that prevents loosening. In different embodiments the features resemble an array of microbumps or pyramids, or anisotropic features such as rasp teeth, shingles, or slanted cantilevered fiber/rods. The use of microbumps present a smaller surface area when moving, while providing full area contact after the surfaces have relaxed or decompressed; installation may be effected with low force, while high static or resting friction prevents disengagement. Features with directional asymmetry or angled suspension allow the textured surface to slide or deflect when the fixation device moves in one direction, while presenting a high resistance to torque or linear motion when moved in the other direction. Manufacturing is achieved with ion beams or directional treatment with energetic radiation, and regular arrays of the microfeatures may be produced as stationary surface growth phenomena without the use of pattern masks or mechanical contact.