US5219284A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Set of instruments for reaming out dental root canals
Assignee: LES FILS D'AUGUSTE MAILLEFER A BALLAIGUES SA
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Filing: 1992-02-18
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Granted: 1993-06-15
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Expires: 2012-02-18
Abstract
Abstract A set of instruments is provided for reaming out dental root canals. The instruments of the set are distributed in groups of three having, in each group, a common diameter D1 measured at the root of its terminal point. In each group, the diameter D2 measured at the root of the cutting lips of a conical stem of the instrument is different, from one instrument to the next one of the group. Thus, the conicity of the three instruments of each group increases from one to the next, which enables a practitioner to ream out dental root canals to impart thereto a more wide-mouthed shape than is usually the case, such shape being especially suitable to be sealed by means of gutta-percha.
Inventors
- 👤 Peter Velvart
- 👤 Jean-Claude Randin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:38
CPC Classifications
A; A61; A61C; A61C5/00; A61C5/40; A61C5/42
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
154 words
A set of instruments for reaming out dental root canals, said set comprising, each instrument having a conical stem portion with at least one helicoidal cutting lip and a terminating end portion without said at least one lip, each instrument of said set having an end diameter measured at the root of said end portion, said set including at least two instruments having the same end diameter but different stem conicity, said set including several groups of instruments, each said group including a first, second and a third instrument, each instrument of any one group having a common end diameter, the conicities of the instruments of any one group differing from one to the other, wherein the conicities of the instruments overlap from one group to the next, the conicity of the second instrument of each group corresponding to the conicity of the instrument having the largest included angle of the immediately preceding group.
Claim 2
Dependent Claim
154 words
A set of instruments for reaming out dental root canals, said set comprising, each instrument having a conical stem portion with at least one helicoidal cutting lip and a terminating end portion without said at least one lip, each instrument of said set having an end diameter measured at the root of said end portion, said set including at least two instruments having the same end diameter but different stem conicity, said set including several groups of instruments, each said group including a first, second and a third instrument, each instrument of any one group having a common end diameter, the conicities of the instruments of any one group differing from one to the other, wherein the conicities of the instruments overlap from one group to the next, the conicity of the second instrument of each group corresponding to the conicity of the instrument having the largest included angle of the immediately preceding group.
Claim 3
Dependent Claim
42 words
A set of instruments as claimed in claim 1 in which the included angle of the cone constituted by the stem of each instrument of any one of said groups varies from one instrument to the next one, in the same group.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-06-14 | 1996-12-14 | 1997-06-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-06-14 | 2000-12-14 | 2001-06-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-06-14 | 2004-12-14 | 2005-06-15 | $7700.00 | Window Closed / Lapsed |