US4206545A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Prefabricated full crown system
Assignee: Individual
•
Filing: 1978-03-20
•
Granted: 1980-06-10
•
Expires: 1998-03-20
Abstract
Abstract Two preformed pieces are joined onto a natural tooth to constitute a single thickness crown offering the esthetics of a facing and the utility of a full metal cap. Splinting of a dummy tooth between two of the crown assemblies is also accomplished at chairside in conjunction with a routine office-lab procedure.
Inventors
- 👤 Raymond E. Lord
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 13:43
CPC Classifications
A; A61; A61C; A61C5/00; A61C5/70; A61C5/20; A61C5/73
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
107 words
A full crown system comprising a single thickness crown of two separate pieces joined to form a unitary crown adapted to be mounted on and surround a prepared tooth stump to be capped, each of said pieces extending only part way around said stump when mounted thereon, one of said pieces being a metal member providing all of the mesial, distal, lingual, and occlusal or incisal surfaces of the crown, the other of said pieces being a plastic member providing only the esthetic facial surface of the crown, mating surfaces provided on said two pieces serving to join or splint said members without overlap of said members.
Claim 2
Dependent Claim
107 words
A full crown system comprising a single thickness crown of two separate pieces joined to form a unitary crown adapted to be mounted on and surround a prepared tooth stump to be capped, each of said pieces extending only part way around said stump when mounted thereon, one of said pieces being a metal member providing all of the mesial, distal, lingual, and occlusal or incisal surfaces of the crown, the other of said pieces being a plastic member providing only the esthetic facial surface of the crown, mating surfaces provided on said two pieces serving to join or splint said members without overlap of said members.
Claim 3
Dependent Claim
29 words
The full crown system of claim 1 wherein a pair of said single thickness crowns is splinted to an intervening pontic member to effect replacement of a missing tooth.
Claim 4
Dependent Claim
23 words
The full crown system of claim 2 wherein said pontic is joined to said metal member of each of said pair of crowns.
Claim 5
Dependent Claim
21 words
The full crown system of claim 1 wherein said metal member is formed to permit precision clasping for partial denture construction.
Claim 6
Dependent Claim
25 words
The full crown system of claim 1 wherein said metal member is 10 mil stainless steel, and said plastic member is 10 mil acrylic plastic.
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) | 1983-06-10 | 1983-12-10 | 1984-06-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-06-10 | 1987-12-10 | 1988-06-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-06-10 | 1991-12-10 | 1992-06-10 | $7700.00 | Window Closed / Lapsed |