Dentistry – Apparatus – Tool bit
Patent
1987-11-23
1989-08-08
Peshock, Robert
Dentistry
Apparatus
Tool bit
A61C 306
Patent
active
048548715
ABSTRACT:
A method and apparatus for forming a counterbored channel into the top surface of a tooth root in preparation for receiving a dental post and core during the fabrication of a superstructure on the tooth root. A dental tool is utilized for forming a counterbored recess around the mouth of a pre-drilled central bore. A dental jig having an enlarged flange which snugly fits into the counterbored channel is then used to form ancillary bores to provide a contoured aperture which will receive a correspondingly contoured post. The dental tool is then used to make similar counterbored recesses around the ancillary bores whereby the composite of the counterbored recesses forms a substantial oval channel wherein the core can suitably sit on a level surface perpendicular to the post without the necessity of leveling off the entire upper surface of the tooth root.
REFERENCES:
patent: 1200921 (1916-10-01), Chester
patent: 1499970 (1924-07-01), Bush
patent: 1734548 (1929-11-01), Wacker
patent: 2453696 (1948-11-01), Brooks
patent: 2748483 (1956-06-01), Hoffmeister
patent: 2978846 (1961-04-01), Barron
patent: 4708655 (1987-11-01), Weissman
Ipco Corporation
Peshock Robert
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