Dentistry – Apparatus – Hand manipulatable implement
Reexamination Certificate
2008-05-06
2008-05-06
Yao, Sam Chuan (Department: 4111)
Dentistry
Apparatus
Hand manipulatable implement
C433S139000, C433S153000, C433S163000, C433S152000, C433S220000, C433S215000, C433S127000
Reexamination Certificate
active
11467418
ABSTRACT:
An endodontic instrument extractor tool is configured for removing a fragment of a broken endodontic instrument that has become lodged within a root canal of a tooth. The extractor tool comprises an elongate shaft, including a hollow gripping body at a distal end, and a proximal handle portion. The hollow gripping body includes an inside diameter that is initially greater than a cross-sectional dimension of a fragment of a broken endodontic instrument to be removed from a root canal of a tooth. The inside diameter of the hollow gripping body defines a hollow interior cavity portion into which at least a portion of the fragment is receivable. At least the hollow gripping body of the body is formed of a shape memory alloy (e.g., nickel-titanium) or polymer in an expanded configuration so that upon heating, the shape memory alloy or polymer returns to its unexpanded configuration, tightly gripping around a proximal end of the fragment.
REFERENCES:
patent: 3322124 (1967-05-01), Donald
patent: 3703767 (1972-11-01), Masserann et al.
patent: 3906636 (1975-09-01), Rainey
patent: 4337038 (1982-06-01), Saito et al.
patent: 4746292 (1988-05-01), Johnson
patent: 5879160 (1999-03-01), Ruddle
patent: 5893713 (1999-04-01), Garman et al.
patent: 5915964 (1999-06-01), Walia
patent: 6227855 (2001-05-01), Hickok et al.
patent: 6494713 (2002-12-01), Pond
patent: 6575748 (2003-06-01), Filhol
patent: 6976844 (2005-12-01), Hickok et al.
patent: 7021935 (2006-04-01), Aeby et al.
patent: 2003/0124485 (2003-07-01), Teraushi
patent: 2006/0286511 (2006-12-01), Aleksandrovskiy et al.
patent: 2007/0134621 (2007-06-01), Terauchi
patent: 1023195 (2001-11-01), None
patent: 1440668 (2004-07-01), None
patent: 01/269356 (2001-10-01), None
patent: 04/024621 (2004-01-01), None
patent: 05/160542 (2005-06-01), None
patent: WO 05/018477 (2005-03-01), None
patent: WO 05/077286 (2005-08-01), None
patent: WO 2005077286 (2005-08-01), None
Patel Yogesh P
Ultradent Products Inc.
Workman Nydegger
Yao Sam Chuan
LandOfFree
Endodontic instrument extractor tool manufactured from a... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Endodontic instrument extractor tool manufactured from a..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Endodontic instrument extractor tool manufactured from a... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3957014