Patent US3772791A successfully refreshed from Google Patents.
US3772791A
Expired / Lapsed
US
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Endodontic operating system
Assignee: Individual
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Filing: 1971-07-26
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Granted: 1973-11-20
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Expires: 1991-07-26
Abstract
Abstract An endodontic operating system which includes a measurement instrument and a sleeve adapted to be secured thereto; a working instrument and a measurement sleeve adapted to be secured thereto; a multi-purpose forceps or pliers; means for attaching the measurement sleeve to the working tool in predetermined relationship therewith and an assembly holder for holding the components of the system. The measurement instrument and sleeve thereof enable the instrument to be inserted into the root canal of a tooth with the sleeve secured thereto whereby by means of Xray a predetermined depth relationship can be determined. The working instrument and the measurement sleeve associated therewith of a new design and a further application to existing instruments enable that sleeve to be placed on the working instrument in such a fashion that the working instrument enters the tooth to the predetermined depth determined by the measurement instrument which further may serve as an operating handle for the working instrument. Securing of the sleeves to both the measuring and working instruments is accomplished by the multipliers or forceps. The assembly holder provides a place for storing these components as well as for means for securing the measurement sleeve to the working instrument in its predetermined relationship.
Inventors
- 👤 O Malmin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 07:50
CPC Classifications
A; A61; A61C; A61C5/00; A61C5/40; A61C5/44
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
130 words
An endodontic measurement method for a root canal therapy, comprising the steps of: A. inserting a measuring instrument having a handle and a shank with measuring indicia throughout its length, with said shank having a substantially smooth tapered surface throughout its length, into a root canal; B. telescoping and permanently securing a cylindrical,elongate, deformable sleeve, having an internal configuration that corresponds to the external configuration of the measuring instrument, by crimping it to the handle of the measuring instrument so that one end of said sleeve bottoms on the crown of the tooth; C. X-raying the tooth; D. removing said measuring instrument and sleeve; and E. determining the accurate working length or limit desired by comparative measurement of the X-ray images of the root canal length and the instrument length.
Claim 2
Dependent Claim
130 words
An endodontic measurement method for a root canal therapy, comprising the steps of: A. inserting a measuring instrument having a handle and a shank with measuring indicia throughout its length, with said shank having a substantially smooth tapered surface throughout its length, into a root canal; B. telescoping and permanently securing a cylindrical,elongate, deformable sleeve, having an internal configuration that corresponds to the external configuration of the measuring instrument, by crimping it to the handle of the measuring instrument so that one end of said sleeve bottoms on the crown of the tooth; C. X-raying the tooth; D. removing said measuring instrument and sleeve; and E. determining the accurate working length or limit desired by comparative measurement of the X-ray images of the root canal length and the instrument length.
Claim 3
Dependent Claim
129 words
An endodontic working method for enlarging root canals comprising the steps of: A. telescoping and permanently securing an elongate, deformable, cylindrical sleeve to the handle of a working instrument by crimping it about said handle so that the effective predetermined exposed length of cutting blade of the working instrument beyond the end of the sleeve equals the desired determined working length of the root canal from the crown to the apex of the root; B. utilizing said working instrument in increasing cutting blade diameters to progressively enlarge the diameter of the root canal; and C. applying means for irrigating, evacuating and drying the tooth, thereby removing the working debris by use of an irrigating evacuation syringe between each usage of the individual progressively increasing diameters of the working instruments.
Claim 4
Dependent Claim
129 words
An endodontic working method for enlarging root canals comprising the steps of: A. telescoping and permanently securing an elongate, deformable, cylindrical sleeve to the handle of a working instrument by crimping it about said handle so that the effective predetermined exposed length of cutting blade of the working instrument beyond the end of the sleeve equals the desired determined working length of the root canal from the crown to the apex of the root; B. utilizing said working instrument in increasing cutting blade diameters to progressively enlarge the diameter of the root canal; and C. applying means for irrigating, evacuating and drying the tooth, thereby removing the working debris by use of an irrigating evacuation syringe between each usage of the individual progressively increasing diameters of the working instruments.
Claim 5
Dependent Claim
125 words
An endodontic surgical method comprising the steps of: A. inserting a measuring instrument having a handle portion and a shank portion into a root canal; B. permanently securing a first elongate, deformable, cylindrical sleeve to the handle of said instrument by crimping it thereto in telescoped relationship so that one end of said sleeve bottoms on the crown of the tooth; C. X-raying the tooth; D. removing said instrument and sleeve; and E. securing a second elongate, deformable, cylindrical sleeve to the handle of a working instrument of any cross sectional configuration in telescoped relationship thereto so that the amount of projection of the blade of said working instrument equals the amount of projection of the shank of said measuring instrument from said first sleeve.
Claim 6
Dependent Claim
125 words
An endodontic surgical method comprising the steps of: A. inserting a measuring instrument having a handle portion and a shank portion into a root canal; B. permanently securing a first elongate, deformable, cylindrical sleeve to the handle of said instrument by crimping it thereto in telescoped relationship so that one end of said sleeve bottoms on the crown of the tooth; C. X-raying the tooth; D. removing said instrument and sleeve; and E. securing a second elongate, deformable, cylindrical sleeve to the handle of a working instrument of any cross sectional configuration in telescoped relationship thereto so that the amount of projection of the blade of said working instrument equals the amount of projection of the shank of said measuring instrument from said first sleeve.
References Cited (Backward Citations)
US3358826A
Cited
US3562913A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-11-19 | 1977-05-21 | 1977-11-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-19 | 1981-05-21 | 1981-11-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-19 | 1985-05-21 | 1985-11-20 | $7700.00 | Window Closed / Lapsed |