James D Norris

US Patent:

41909585, Mar 4, 1980

Filed:

Jan 17, 1978

Appl. No.:

5/870109

Inventors:

Howard Martin - Silver Spring MD
James P. Norris - Baltimore MD

International Classification:

A61C 502

US Classification:

433102

Abstract:

This invention is an improvement in endodontic drills used by dentists specializing in root canal dentistry. Present endodontic practice in the preparation, cleaning, and shaping of root canals in teeth entails the use of inefficient steel drills. The present invention provides a diamond coated drill and file combined of a design that assures an extremely smooth canal surface to facilitate the cleaning and sealing of the root canal.

US Patent:

42958270, Oct 20, 1981

Filed:

Dec 31, 1979

Appl. No.:

6/108969

Inventors:

Howard Martin - Silver Spring MD
James P. Norris - Catonsville MD

International Classification:

A61C 502

US Classification:

433 81

Abstract:

The invention is an improved endodontic apparatus attachment for holding instruments, particularly endodontic drill files that are energized and vibrated by ultrasonic means. The invention also provides for the flow-through of solutions during debriding and irrigating of root canals. The invention consists of a hollow tube-like means for conducting solution and directing it in the axial direction of the endodontic drill file. The hollow tube-like means incorporates a special holding means therein for mounting the drill file in such a position so that ultrasonic waves can be transmitted to the drill file to cause it to vibrate in a manner that improves debriding of the root canal.