	US 7,347,692 B2
	Dental bur
Patrick L. Roetzer, 142 East D St., Benicia, Calif. 94510 (US); and Michael Feldman, Lakewood, N.J. (US)
Assigned to Patrick L. Roetzer, Benicia, Calif. (US)
Filed on Dec. 03, 2003, as Appl. No. 10/729,572.
Application 10/729572 is a continuation in part of application No. 10/274568, filed on Oct. 18, 2002, granted, now 6,902,400.
Claims priority of provisional application 60/431146, filed on Dec. 05, 2002.
Prior Publication US 2004/0081940 A1, Apr. 29, 2004
This patent is subject to a terminal disclaimer.
Int. Cl. A61C 3/02 (2006.01)

U.S. Cl. 433—165

11 Claims

1. A dental bur structure connectable to means of rotation, particularly useful for removing a dental post containing composite material from a dental canal having a wall, comprising:

a. a rotatable shaft, said rotatable shaft including a proximal portion relative to the means of rotation, and a distal portion relative to the means of rotation;

b. a terminus located at the distal portion of said rotatable shaft, said terminus including a shoulder portion of a first cross-sectional dimension and a tip extending from said shoulder portion, said tip having a cross-sectional dimension of less than said cross-sectional dimension of said shoulder portion, said tip having a smooth surface and an end for generating heat upon rotation of said shaft to melt a portion of the composite material in the dental canal in the vicinity of said tip;

c. a dentin abrading surface, said dentin abrading surface lying on said proximal portion of said rotatable shaft and being sized to remove dentin from the wall of the dental canal; and

d. means for removing composite material of said dental post upon rotation of said rotatable shaft, said means for removing composite material of said dental post being located on said rotatable shaft between said tip and said dentin abrading surface, said means for removing composite material of said dental post being sized to remove said composite material from the dental canal without removing dentin from the dental canal wall, said means for removing composite material comprising a fluted surface possessing a plurality of cutting flutes each having a rake angle of between 5 degrees and 25 degrees, said tip, said dentin abrading surface, and said means for removing composite material providing the dental canal with a substantially continuous tapered wall following removal of the composite material.