Dentistry – Method or material for testing – treating – restoring – or... – Endodontic
Patent
1991-03-22
1993-06-01
O'Connor, Cary E.
Dentistry
Method or material for testing, treating, restoring, or...
Endodontic
433 81, 433102, A61C 502, A61G 502
Patent
active
052154610
ABSTRACT:
An appliance (20) for use in conjunction with the obturation of prepared root canals employing a rigid carrier member (23) coated with a thermoplastic material (29) comprises an instrument (40) having a barrel (41), a movable plunger (43), and an orifice (48), and a quantity of the thermoplastic material (29) within the barrel. The orifice has a diameter greater than the distal end (30) of the rigid member, the member being insertable through the orifice and into the thermoplastic material whereby upon extrusion of a quantity of the thermoplastic material from the barrel, the rigid member is provided carrying a coating of thermoplastic material. The present invention also provides an appliance (60) for the obturation of prepared root canals comprising a rigid carrier member (62) having a distal end (68) insertable into a root canal and a diameter less than that of the canal; an instrument (61) having a barrel, (63) a movable plunger (65) and an orifice, (69) and a quantity of thermoplastic material (29 ) within the barrel; the orifice having a diameter greater than the distal end of the carrier member, the distal end being inserted through the orifice and into the thermoplastic material, whereupon extrusion therefrom, in response to movement of the plunger through the barrel toward the orifice, the carrier member is expelled carrying a coating of thermoplastic material covering at least the distal end for obturation of the canal. Finally, a method for coating a rigid carrier with thermoplastic material is provided.
REFERENCES:
patent: 3318000 (1967-05-01), Paris
patent: 3466752 (1969-09-01), Braun
patent: 3863345 (1975-02-01), Malmin
patent: 4619613 (1986-10-01), Fragan
patent: 4758156 (1988-07-01), Johnson
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patent: 4863072 (1989-09-01), Perler
patent: 4894011 (1990-01-01), Johnson
patent: 5067900 (1991-11-01), McSpadden
"A New Gutta-Percha Technique"-Journal of Endodontics, vol. 4, No. 6, pp. 184-188, Jun., 1978.
"A Simple Standardized Technique for Filling Root Canals to the Dento-Cemental Junction with Perfect Fitting Impermeable Materials"--Oral Health, vol. 18, No. 11, pp. 577-584, Nov., 1928.
Cherichetti Cindy A.
O'Connor Cary E.
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