Patent ID: 6902400

Claim:
A dental bur structure connected 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, a distal portion relative to the means of rotation; b. a tip located at the end of said distal portion of said rotatable shaft, said tip possessing a smooth surface and an end which generates heat upon rotation of said shaft to melt a portion of the composite material 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; 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.