US3324555A - Test handle for endodontic root canal treatment - Google Patents

Test handle for endodontic root canal treatment Download PDF

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Publication number
US3324555A
US3324555A US347183A US34718364A US3324555A US 3324555 A US3324555 A US 3324555A US 347183 A US347183 A US 347183A US 34718364 A US34718364 A US 34718364A US 3324555 A US3324555 A US 3324555A
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US
United States
Prior art keywords
handle
instrument
root canal
slot
screw drive
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
Application number
US347183A
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English (en)
Inventor
Zdarsky Eduard
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Individual
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Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Application granted granted Critical
Publication of US3324555A publication Critical patent/US3324555A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • A61C5/44—Means for controlling working depth, e.g. supports or boxes with depth-gauging means, stop positioners or files with adjustably-mounted handles

Definitions

  • This invention relates to a device for treating the root canals of teeth.
  • root canal instruments such as reamers, files and smooth broaches are to be employed by measuring the depth of their insertion into the root canal.
  • the handle may be provided with a measuring scale.
  • a fixation of an adjustable instrument in the handle is difficult. By turning the screw for fixation, the instrument blade is often displaced again; furtheron such a fixation does not allow to determine whether the blade is sufiiciently fixed.
  • a principal object of this invention to provide a test handle which ensures exact adjustment of the blade in the handle.
  • a further object of the invention is to ensure the adjusted blade to remain at the determined point in order to make a later displacement impossible.
  • Still a further object of the invention is to provide a very simple and handy test handle shape.
  • the invention provides a test handle on which the blade is longitudinally slidable only within the handle whereby a guide hook of the instrument is transverse-d in a winding path which is turnable in the handle.
  • the windin-g path is formed by a screw drive which is turnably located in the cylindrical space within the handle.
  • a turn button is provided on the exposed end of the handle.
  • FIG. 1 a longitudinal cross section of a first model
  • FIG. 2 a top view on FIG. 1
  • FIG. 3 a longitudinal cross section through a second model
  • FIG. 4 a top view on FIG. 3.
  • a cylindrical handle 1 on its outside is serrated at 2 in order to achieve a good grip.
  • an instrument such as a blade 4
  • the cylindrical handle has a slot 7 which is fully open only on the one side of the handle which is opposite to the instrument blade tip.
  • the width of the slot corresponds to the diameter of the instrument shaft 5 which is bent on the free end to form a guide hook 6.
  • the hook is slidable within the slot and the instrument can be taken entirely out of the handle on the open side of the slot.
  • the projecting end of the hook is numbered 8.
  • Inside of the cylindrical space a screw drive It is turnably mounted.
  • the hook 6 of the instrument 3,324,555 Patented June 13, 1967 fits in the screw drive and is moved upwardly and downwardly according to the turns of the screw drive.
  • the screw drive 10 is constructed such so as to fit tightly around the instrument shaft and to engage with its superposed windings the hook 6. In this way it is possible to guide the instrument without a wobbling movement.
  • a serrated head 14 of this turning button provides an easy grip.
  • the turning button is provided with a slot 15 in order not to handicap insertion and removal of the instruments.
  • the screw drive has a round cross section in order to reduce friction and wear between the screw drive surface and instrument shaft. In order to obtain a self-locking effect between both parts, the pitch of the screw drive is accordingly low.
  • the movement of an instrument on the handle 1 can be seen or controlled at the end of the hook.
  • a measuring scale can be provided at the outside of the test handle.
  • the screw drive could for example also be made from a square sectional steel.
  • the turning button 12 can be provided with a hole only instead of the serrated head 14 in which a pin or the like tool is inserted for turning of the screw drive.
  • the handle 20 is provided with an outer screw tube 21 which is located turnably in grooves 22 of the handle 20.
  • the instrument shaft 5 is guided whereby also a slot 25 allows of longitudinal movement of the guiding hook 6 respective to the instrument.
  • the end 8 of this guide hook 6 projects into a screw drive 26 which is located on the inside of the screw tube 22.
  • the instrument moves up and down with its shaft 5 Within the slot 25.
  • This slot 25 as well as the screw tube 21 are open on the upper side to allow exchanging of instruments.
  • a measuring scale can be provided on the surface of the instrument shaft itself.
  • an adequate safety device can be provided, for example a key, a bolt or a wedge or a turning tube snapping into a polygon rest located on the handle piece.
  • a device for treating tooth-root-canals comprising a handle having walls defining a cylindrical cavity and a bottom provided with an aperture, coiling drive means in said cavity, rotary means secured to the top of said handle, the upper end of said coiling drive means excentrically secured to said rotary means for actuation of said drive means, a shaft carrying an instrument mounted for axial displacement in said cavity, said instrument being a small rod-like tool of a size adapted to be inserted in a root canal, the lower end of said shaft projecting through said aperture and the upper end of said shaft being bent and riding on said coiling drive means, and a longitudinal slot in the wall of said handle so as to expose the tip of said shaft to observation from the outside.
  • the device as claimed in claim 1 comprising a cali- UNITED STATES PATENTS bration along said slot. 291,297 1/1884 120-9 4.
  • said coil- 5 2,494,412 1/1950 slmkms 120-9 ing drive means is a rod of round cross section. 311391066 6/1964 Aversa 206-56 5.
  • said rotary means is provided with a radial slot for insertion of the RICHARD GAUDET instrument. I. W. HINEY, Assistant Examiner.

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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)
US347183A 1963-02-26 1964-02-25 Test handle for endodontic root canal treatment Expired - Lifetime US3324555A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEZ9940A DE1280469B (de) 1963-02-26 1963-02-26 Messgriff fuer die Zahnwurzelkanalbehandlung

Publications (1)

Publication Number Publication Date
US3324555A true US3324555A (en) 1967-06-13

Family

ID=7621125

Family Applications (1)

Application Number Title Priority Date Filing Date
US347183A Expired - Lifetime US3324555A (en) 1963-02-26 1964-02-25 Test handle for endodontic root canal treatment

Country Status (3)

Country Link
US (1) US3324555A (de)
CH (1) CH408280A (de)
DE (1) DE1280469B (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2280356A1 (fr) * 1974-07-30 1976-02-27 Micro Mega Sa Dispositif de butee amovible pour instruments a canaux dentaires
US5127832A (en) * 1988-04-21 1992-07-07 Vereinigte Dentalwerke Antaeos-Beutelrock-Zipperer Zdarsky Ehrler Gmbh & Co. Kg Measuring handle for treating dental root canals

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US291297A (en) * 1884-01-01 Bichaed m
US2494412A (en) * 1948-02-12 1950-01-10 Leon L Simkins Heated pencil for writing on waxed paper
US3139066A (en) * 1962-07-11 1964-06-30 Aversa Joseph Marking devices

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US291297A (en) * 1884-01-01 Bichaed m
US2494412A (en) * 1948-02-12 1950-01-10 Leon L Simkins Heated pencil for writing on waxed paper
US3139066A (en) * 1962-07-11 1964-06-30 Aversa Joseph Marking devices

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2280356A1 (fr) * 1974-07-30 1976-02-27 Micro Mega Sa Dispositif de butee amovible pour instruments a canaux dentaires
US5127832A (en) * 1988-04-21 1992-07-07 Vereinigte Dentalwerke Antaeos-Beutelrock-Zipperer Zdarsky Ehrler Gmbh & Co. Kg Measuring handle for treating dental root canals

Also Published As

Publication number Publication date
CH408280A (de) 1966-02-28
DE1280469B (de) 1968-10-17

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