US1307446A - Mathew m - Google Patents
Mathew m Download PDFInfo
- Publication number
- US1307446A US1307446A US1307446DA US1307446A US 1307446 A US1307446 A US 1307446A US 1307446D A US1307446D A US 1307446DA US 1307446 A US1307446 A US 1307446A
- Authority
- US
- United States
- Prior art keywords
- rod
- cutting
- cutting edges
- longitudinally
- dental
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 238000005520 cutting process Methods 0.000 description 38
- 208000001798 Nonvital Tooth Diseases 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
Images
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
- A61C5/00—Filling or capping teeth
- A61C5/40—Implements for surgical treatment of the roots or nerves of the teeth; Nerve needles; Methods or instruments for medication of the roots
- A61C5/42—Files for root canals; Handgrips or guiding means therefor
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- Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Neurology (AREA)
- Neurosurgery (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Surgery (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Dentistry (AREA)
- Epidemiology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Dental Tools And Instruments Or Auxiliary Dental Instruments (AREA)
Description
M. M. KERR.
DENTAL INSTRUMENT.
APPLICATION FILED APH. 24. 1915.
1,307,446. v n Patented June 24, i919.
Tlgl- I i Tfg.
jm W7 l mmm IINITED STATES PATENT OFFICE.
MATHEW M. KEER, OF DETROIT, MICHIGAN, ASSIGNOR TO DETROIT DENTAL MANU- FACTURING COMPANY, OF DETROIT, MICHIGAN, A CORPORATION OF MICHIGAN.
DENTAL INSTRUMENT.
Specication of Letters Patent.
Patented J une 24, 1919.
To all whom t may concern.'
Be it known that I, MA'rHEw M. KERR, a citizen of the United States of America, residing at Detroit, in the county of lVayne and State of Michigan, have invented certain new .and useful Improvements in Dental Instruments, of which the following is a specification, reference being` had therein to the accompanying drawings.
The invention relates to dental tools which are designed for use in clearing out the nerve canals in devitalized teeth. Such instruments are usually in the form of reamers which are sufficiently flexible to follow the curves of the canals and operate by a rotary movement in said canals.
It is the object of the present invention to form a broach which, instead of operating as a reamer, may be used as a file, performing its work when longitudinally reciprocated.
In the drawings:
Figure 1 is a magnified elevation of the broach;
Figs. 2 and 3 are cross sections on line and y-y Fig. l; and
Fig. 4 is a longitudinal section.
In the present state of the art dental tools of thischaracter are usually formed of fine steel rods or needles, which are ground into a polygonal and pointed form and are then twisted to give a slightly spiral form to the cutting edge. The pitch of the spiral is, however, such that the general direction is longitudinal of the needle, and, as before stated, in operation the tool must be rotated to perform its work. In my improved construction, the polygonal rod is twisted to such an extent, or otherwise so fashioned, that the cutting edge extends transverse to the longitudinal axis, and at such an angle that the work will be performed by a longitudinal reciprocating movement instead of a rotary movement.
As specifically shown, A is the round rod, which is ground with polygonal faces B forming cutting angles C. These angles or cutting edges, when the rod is twisted, will form spirals D of relatively flat pitch, while at the point the cutting edges extend longitudinally, as at E, to form a reamer.
In use, the tool when inserted in a nerve canal is moved longitudinally, causing the transverse cutting edges D to operate as files. This instrument is particularly useful where the canal is not round in cross section, as the cut is not produced by a rotary motion.
The cutting edges are preferably formed with a sharper angle on the upper side than that upon the lower side, so that the cutting will be effected on the outward pull instead of upon the inward push of the instrument.
This is advantageous, as the small size and' flexibility of the rod would endanger breaking if the work were performed by a pushing movement.
Ihat I claim as my invention is l. A dental instrument comprising a rod provided with ground polygonal faces forming cutting edges, said rod having the cutting edges at one en-d tapering to a point and extending substantially longitudinally thereof, and said rod being twisted to form spirals of relatively flat pitch, the cutting edges of the spirals having a sharper angle on the side opposite the point than the cutting edges on the same side with the point.
2. A dental instrument, comprising a polygonal rod twisted to form a spiral cutting ,edge at an angle to effect cutting when moved longitudinally of the axis of the rod.
3. A dental instrument, comprising a rod having a spirally twisted cutting edge, the pitch of the spiral being such as to effect a cutting operation when reciprooated longitudinally of the axis of the rod.
4. A dental instrument, having a point portion with longitudinally-extending cutting edges and a portion having a spirallytwisted cutting edge, the pitch of the spiral being such as to effect a cutting operation when reciprocated longitudinally of the axis of the rod.
In testimony whereof I affix my signature in presence of two witnesses.
MATHEW M. KERR.
Witnesses EDWIN HERZOG, K. CARLYLE.
Copies of this patent may be obtained for ve cents each, by addressing the- Commissioner of Patents. Washington, I). C.
Publications (1)
Publication Number | Publication Date |
---|---|
US1307446A true US1307446A (en) | 1919-06-24 |
Family
ID=3374965
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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US1307446D Expired - Lifetime US1307446A (en) | Mathew m |
Country Status (1)
Country | Link |
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US (1) | US1307446A (en) |
Cited By (30)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1979000344A1 (en) * | 1977-12-05 | 1979-06-28 | Engstroem G | Root canal file and method of manufacturing it |
US4260379A (en) * | 1979-05-17 | 1981-04-07 | Sybron Corporation | Endodontic instrument |
US4268253A (en) * | 1979-12-26 | 1981-05-19 | Gross Michael J | Dowel post for dental and medical prosthetic devices |
US4332561A (en) * | 1979-08-03 | 1982-06-01 | Inventive Technology International, Inc. | Dental file |
US4353698A (en) * | 1979-12-20 | 1982-10-12 | Inventive Technology International, Inc. | Dental tool |
WO1983001565A1 (en) * | 1981-11-09 | 1983-05-11 | Inventive Tech Int | Dental instrument |
US4443193A (en) * | 1983-02-08 | 1984-04-17 | Roane James B | Endodontic instrument |
US4536159A (en) * | 1983-02-08 | 1985-08-20 | Roane James B | Endodontic instrument |
US4538989A (en) * | 1979-10-01 | 1985-09-03 | Dentsply International, Inc. | Dental reamer |
US4611508A (en) * | 1983-02-08 | 1986-09-16 | Roane James B | Endodontic instrument |
US4634378A (en) * | 1982-12-10 | 1987-01-06 | Micro-Mega | Dental drill |
US4661061A (en) * | 1985-07-22 | 1987-04-28 | Howard Martin | Four sided root canal rasp for root canal preparation |
US4871312A (en) * | 1988-11-04 | 1989-10-03 | Quality Dental Products, Inc. | Dental compactor instrument |
US4904185A (en) * | 1988-11-04 | 1990-02-27 | Mcspadden John T | Dental instrument |
US4934934A (en) * | 1988-11-04 | 1990-06-19 | Quality Dental Products, Inc. | Dental file/reamer instrument |
US5017137A (en) * | 1988-11-18 | 1991-05-21 | Bernard Weissman | Dental tool reamer capable of following natural curvature of tooth canal |
US5035617A (en) * | 1990-06-05 | 1991-07-30 | Mcspadden John T | Endodontic instrument |
US5106298A (en) * | 1991-04-03 | 1992-04-21 | Heath Derek E | Endodontic dental instrument |
US5213499A (en) * | 1992-01-28 | 1993-05-25 | Laser Endo Technic | Endodontic files |
USRE34439E (en) * | 1988-11-04 | 1993-11-09 | Heath Derek E | Dental compactor instrument |
US5692902A (en) * | 1995-03-24 | 1997-12-02 | Maillefer Instruments S.A. | Set of instruments for the boring of radicular dental canals |
US5735689A (en) * | 1995-12-11 | 1998-04-07 | Tycom Dental Corporation | Endodontic dental instrument |
US5752825A (en) * | 1994-04-28 | 1998-05-19 | Buchanan; Leonard Stephen | Endodontic treatment system |
US5842862A (en) * | 1996-11-27 | 1998-12-01 | Nissan; Roni | Endodontic tool |
US5882198A (en) * | 1997-03-28 | 1999-03-16 | Ormco Corporation | Endodontic instrument having enhanced compliance at the tip |
US5938440A (en) * | 1995-12-11 | 1999-08-17 | Ormco Corporation | Endodontic instrument |
US6419488B1 (en) | 1995-12-11 | 2002-07-16 | Ormco Corporation | Endodontic instrument having a chisel tip |
US20050100859A1 (en) * | 2003-03-31 | 2005-05-12 | Graybill Lonnie M. | Endodontic instruments and method of manufacturing same |
US7967605B2 (en) | 2004-03-16 | 2011-06-28 | Guidance Endodontics, Llc | Endodontic files and obturator devices and methods of manufacturing same |
US8714978B2 (en) | 2010-10-06 | 2014-05-06 | Dentsply International Inc. | Endodontic system and method |
-
0
- US US1307446D patent/US1307446A/en not_active Expired - Lifetime
Cited By (41)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1979000344A1 (en) * | 1977-12-05 | 1979-06-28 | Engstroem G | Root canal file and method of manufacturing it |
US4260379A (en) * | 1979-05-17 | 1981-04-07 | Sybron Corporation | Endodontic instrument |
US4457710A (en) * | 1979-08-03 | 1984-07-03 | Inventive Technology International | Dental instrument |
US4332561A (en) * | 1979-08-03 | 1982-06-01 | Inventive Technology International, Inc. | Dental file |
US4538989A (en) * | 1979-10-01 | 1985-09-03 | Dentsply International, Inc. | Dental reamer |
US4353698A (en) * | 1979-12-20 | 1982-10-12 | Inventive Technology International, Inc. | Dental tool |
US4268253A (en) * | 1979-12-26 | 1981-05-19 | Gross Michael J | Dowel post for dental and medical prosthetic devices |
WO1982003978A1 (en) * | 1981-05-14 | 1982-11-25 | Tech Int Inventive | Dental file |
WO1983001565A1 (en) * | 1981-11-09 | 1983-05-11 | Inventive Tech Int | Dental instrument |
US4634378A (en) * | 1982-12-10 | 1987-01-06 | Micro-Mega | Dental drill |
US4443193A (en) * | 1983-02-08 | 1984-04-17 | Roane James B | Endodontic instrument |
US4536159A (en) * | 1983-02-08 | 1985-08-20 | Roane James B | Endodontic instrument |
US4611508A (en) * | 1983-02-08 | 1986-09-16 | Roane James B | Endodontic instrument |
US4661061A (en) * | 1985-07-22 | 1987-04-28 | Howard Martin | Four sided root canal rasp for root canal preparation |
US4871312A (en) * | 1988-11-04 | 1989-10-03 | Quality Dental Products, Inc. | Dental compactor instrument |
US4904185A (en) * | 1988-11-04 | 1990-02-27 | Mcspadden John T | Dental instrument |
US4934934A (en) * | 1988-11-04 | 1990-06-19 | Quality Dental Products, Inc. | Dental file/reamer instrument |
USRE34439E (en) * | 1988-11-04 | 1993-11-09 | Heath Derek E | Dental compactor instrument |
US5017137A (en) * | 1988-11-18 | 1991-05-21 | Bernard Weissman | Dental tool reamer capable of following natural curvature of tooth canal |
US5035617A (en) * | 1990-06-05 | 1991-07-30 | Mcspadden John T | Endodontic instrument |
US5106298A (en) * | 1991-04-03 | 1992-04-21 | Heath Derek E | Endodontic dental instrument |
US5213499A (en) * | 1992-01-28 | 1993-05-25 | Laser Endo Technic | Endodontic files |
US5897316A (en) * | 1994-04-28 | 1999-04-27 | Buchanan; Leonard Stephen | Endodontic treatment system |
USRE39174E1 (en) * | 1994-04-28 | 2006-07-11 | Leonard Stephen Buchanan | Endodontic treatment system |
US5752825A (en) * | 1994-04-28 | 1998-05-19 | Buchanan; Leonard Stephen | Endodontic treatment system |
US5836764A (en) * | 1994-04-28 | 1998-11-17 | Buchanan; Leonard Stephen | Endodontic treatment system |
US5842861A (en) * | 1994-04-28 | 1998-12-01 | Buchanan; Leonard Stephen | Endodontic treatment system |
US5921775A (en) * | 1994-04-28 | 1999-07-13 | Buchanan; Leonard Stephen | Endodontic treatment system |
US5692902A (en) * | 1995-03-24 | 1997-12-02 | Maillefer Instruments S.A. | Set of instruments for the boring of radicular dental canals |
US5902106A (en) * | 1995-12-11 | 1999-05-11 | Ormco Corporation | Endodontic dental instrument |
US5938440A (en) * | 1995-12-11 | 1999-08-17 | Ormco Corporation | Endodontic instrument |
US5980250A (en) * | 1995-12-11 | 1999-11-09 | Tycom Dental Corporation | Endodontic instrument |
US6419488B1 (en) | 1995-12-11 | 2002-07-16 | Ormco Corporation | Endodontic instrument having a chisel tip |
US5735689A (en) * | 1995-12-11 | 1998-04-07 | Tycom Dental Corporation | Endodontic dental instrument |
US5842862A (en) * | 1996-11-27 | 1998-12-01 | Nissan; Roni | Endodontic tool |
US5882198A (en) * | 1997-03-28 | 1999-03-16 | Ormco Corporation | Endodontic instrument having enhanced compliance at the tip |
US20050100859A1 (en) * | 2003-03-31 | 2005-05-12 | Graybill Lonnie M. | Endodontic instruments and method of manufacturing same |
US7311522B2 (en) | 2003-03-31 | 2007-12-25 | Miltex Technology Corporation | Endodontic instruments and method of manufacturing same |
US7967605B2 (en) | 2004-03-16 | 2011-06-28 | Guidance Endodontics, Llc | Endodontic files and obturator devices and methods of manufacturing same |
US10052173B2 (en) | 2004-03-16 | 2018-08-21 | Guidance Endodontics, Llc | Endodontic files and obturator devices and methods of manufacturing same |
US8714978B2 (en) | 2010-10-06 | 2014-05-06 | Dentsply International Inc. | Endodontic system and method |
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