Dentistry – Apparatus – Broach
Patent
1986-08-22
1989-06-06
Wilson, John J.
Dentistry
Apparatus
Broach
433 72, 433 75, A61C 502
Patent
active
048367800
ABSTRACT:
A series of instruments for use in cleaning and shaping the root canal of a tooth is disclosed. The instruments are files having increasing tapers on sequentially-used files, with all of the files having the same, or nearly the same, small diameter at the tip of the cutting surface. The files create an increasingly tapered aperture in the root canal, which is exactly sized to admit a selected one of a set of variable taper filling materials available for filling a prepared root canal. Each file also has a safe edge to eliminate perforating the root canal, a rounded tip to eliminate ledging, and a handle shaped to provide a tactile reference to the orientation of the safe edge.
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"The Effect of Preparation Procedures on Original Canal Shape and on Apical Foramen Shape", by Franklin S. Weine et al., Journal of Endodontics, vol. 1, No. 8, Aug. 1985, pp. 225-262.
Bissell Henry M.
Lepiane Adriene J.
Wilson John J.
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