US5286193A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Endodontic gutta percha placement
Assignee: Individual
•
Filing: 1991-10-30
•
Granted: 1994-02-15
•
Expires: 2011-10-30
Abstract
Abstract A prefilled disposable apparatus is provided for placing thermoplastic filling material including gutta percha in an endodontically prepared root canal. A hollow carrier has a distal end and a proximal end and has a cylindrical carrier bore defined therethrough. A plug of thermoplastic filling material is contained in the carrier bore. A displacing shaft is received in the proximal end of the carrier bore for displacing the thermoplastic filling material from the distal end of the carrier bore into the endodontically prepared root canal.
Inventors
- 👤 James B. Roane
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:49
CPC Classifications
A; A61; A61C; A61C5/00; A61C5/50; A61C5/55
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
120 words
A prefilled disposable apparatus for placing filling material in an endodontically prepared root canal, comprising: a hollow disposable carrier means for storing said filling material prior to use and for carrying said filling material to a position adjacent an opening to said root canal for displacement into said root canal, said carrier means being a segment of straight cylindrical tubing having an open unobstructed first end and an open unobstructed second end and having a constant diameter cylindrical outer surface extending from said first end to said second end, and having a constant diameter carrier bore defined through said tubing from said first end to said second end; and a filling material including gutta percha stored in said carrier bore.
Claim 2
Dependent Claim
120 words
A prefilled disposable apparatus for placing filling material in an endodontically prepared root canal, comprising: a hollow disposable carrier means for storing said filling material prior to use and for carrying said filling material to a position adjacent an opening to said root canal for displacement into said root canal, said carrier means being a segment of straight cylindrical tubing having an open unobstructed first end and an open unobstructed second end and having a constant diameter cylindrical outer surface extending from said first end to said second end, and having a constant diameter carrier bore defined through said tubing from said first end to said second end; and a filling material including gutta percha stored in said carrier bore.
Claim 3
Dependent Claim
25 words
The apparatus of claim 1, wherein: said filling material occupies said entire carrier bore from said first end to said second end of said tubing.
Claim 4
Dependent Claim
25 words
The apparatus of claim 1, wherein: said segment of tubing has a length in the range of from about 12 mm to about 18 mm.
Claim 5
Dependent Claim
25 words
The apparatus of claim 1, wherein: said diameter of said carrier bore is in the range of from about 1.0 mm to about 1.6 mm.
Claim 6
Dependent Claim
39 words
The apparatus of claim 1, wherein: said segment of tubing is constructed of a metallic thermal conducting material which can be flame-heated to soften said filling material prior to displacing said filling material into said endodontically prepared root canal.
Claim 7
Independent Claim
148 words
A method of placing thermoplastic filler material in an endodontically prepared root canal, comprising: (a) providing a prefilled hollow carrier having a proximal end and a distal end and having a carrier bore defined through said carrier from said proximal end to said distal end, said carrier having a thermoplastic filler material held in said carrier bore, and providing a displacement shaft received in said proximal end of said carrier and engaging said thermoplastic filler material; (b) heating said prefilled carrier to soften said thermoplastic filler material; (c) inserting said heated prefilled carrier, including said proximal and distal ends thereof entirely within a patient's mouth; (d) placing said distal end of said carrier adjacent an opening to said endodontically prepared root canal; and (e) displacing heated thermoplastic filler material from said carrier directly into said endodontically prepared root canal by pushing said displacement shaft into said carrier bore.
Claim 8
Independent Claim
148 words
A method of placing thermoplastic filler material in an endodontically prepared root canal, comprising: (a) providing a prefilled hollow carrier having a proximal end and a distal end and having a carrier bore defined through said carrier from said proximal end to said distal end, said carrier having a thermoplastic filler material held in said carrier bore, and providing a displacement shaft received in said proximal end of said carrier and engaging said thermoplastic filler material; (b) heating said prefilled carrier to soften said thermoplastic filler material; (c) inserting said heated prefilled carrier, including said proximal and distal ends thereof entirely within a patient's mouth; (d) placing said distal end of said carrier adjacent an opening to said endodontically prepared root canal; and (e) displacing heated thermoplastic filler material from said carrier directly into said endodontically prepared root canal by pushing said displacement shaft into said carrier bore.
Claim 9
Dependent Claim
25 words
The method of claim 6, further comprising: prior to step (d), closing an apical foramen of said endodontically prepared root canal with thermoplastic filler material.
Claim 10
Dependent Claim
19 words
The method of claim 6, further comprising: after step (e), compacting said thermoplastic filler material in said root canal.
Claim 11
Dependent Claim
20 words
The method of claim 6, wherein: step (a) is further characterized in that said thermoplastic filler material includes gutta percha.
Claim 12
Dependent Claim
17 words
The method of claim 6, wherein: step (b) includes heating said prefilled carrier over an open flame.
Claim 13
Dependent Claim
35 words
The method of claim 6, further comprising: assembling said displacement shaft with said carrier by heating a tip of said displacement shaft and inserting said heated tip into said thermoplastic filler material in said carrier.
Claim 14
Dependent Claim
15 words
The method of claim 11, wherein: said assembling step is performed prior to step (b).
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-02-14 | 1997-08-16 | 1998-02-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-02-14 | 2001-08-16 | 2002-02-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-02-14 | 2005-08-16 | 2006-02-15 | $7700.00 | Window Closed / Lapsed |