Dentistry – Apparatus – Broach
Reexamination Certificate
2006-01-03
2006-01-03
Lewis, Ralph A. (Department: 3732)
Dentistry
Apparatus
Broach
C433S081000, C433S224000
Reexamination Certificate
active
06981869
ABSTRACT:
Unitary, one-piece plastic molded micro-brushes are provided to remove the smear layer that remains in the root canal and access chamber after the pulp, bacteria, and related irritants have been mechanically and chemically removed from the root canal and access chamber using rotary cutting burs, files and various chemical reagents. The brushes include a handle, shaft or shank and a tapered brush section extending from the distal end of the shank. The brush section includes a plurality of bristles extending radially from a core. The bristles of the root canal brush can be formed in a reverse thread pattern. The brush section of the root canal brush has a diameter of between about 0.1 mm and about 0.2 mm at a tip end and a diameter of between about 0.5 mm and 3 mm at a coronal-most end. The brush section of the root canal brush is about 16 mm long, and has a taper of about 2% to about 12%. In the access chamber brush, the core can be formed as to be spherical, football-shaped, or tapered. The brushes are injection molded from an FDA approved resin.
REFERENCES:
patent: 717594 (1903-01-01), Miles, Jr.
patent: 4280518 (1981-07-01), Gambaro
patent: 4832061 (1989-05-01), Hwang
patent: 5775346 (1998-07-01), Szyszkowski
patent: 5899693 (1999-05-01), Himeno et al.
patent: 6059570 (2000-05-01), Dragan et al.
patent: 6082999 (2000-07-01), Tcherny et al.
patent: 6085761 (2000-07-01), Inaba
patent: 6179617 (2001-01-01), Ruddle
patent: D441141 (2001-04-01), Shalita
patent: 6343929 (2002-02-01), Fischer
patent: 6491520 (2002-12-01), Carlsson et al.
patent: 6634051 (2003-10-01), Dragan et al.
patent: 6638067 (2003-10-01), Fischer et al.
patent: 2002/0172922 (2002-11-01), Mannschedel
patent: 345852 (2002-12-01), None
D.M. Keir, DDS; E.S. Senia, DDS, MS, BS, FACD; and S. Montgomery, DDS, FACD—“Effectiveness of a Brush in Removing Postinstrumentation Canal Debris”—Journal of Endodontics—vol. 16, No. 7, Jul. 1990 -pp. 323-327.
Cohen and Burns, Pathways To The Pulp, 8thEd. (2002), pp. xiii, 261-262.
International Search Report and Written Opinion from Corresponding International App. No. PCT/US04/08042.
Lewis Ralph A.
Polster Lieder Woodruff & Lucchesi L.C.
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