Patent US4744757A successfully refreshed from Google Patents.
US4744757A
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Fixed partial dentures and method of making
Assignee: Corning Glass Works
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Filing: 1985-03-20
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Granted: 1988-05-17
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Expires: 2005-03-20
Abstract
Abstract This invention is concerned with preparing fixed partial dentures consisting of abutment crowns and pontics connected through male/female attachments and being sealed together by means of a joining medium. In the most preferred embodiment, the parts of the dentures are formed from machinable glass-ceramic materials and the joining medium is curable through exposure to visible light radiation.
Inventors
- 👤 Peter J. Adair
- 👤 Vincent T. Cammarato
- 👤 David G. Grossman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 22:37
CPC Classifications
A; A61; A61C; A61C13/00; A61C13/0003; A61C13/0006; A61C13/225; A61C13/26
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
102 words
Fixed partial dentures consisting of abutment crowns and pontics connected through male/female attachments fixedly-joined into unitary structures, said female portions of said attachments having a location within the pontics of said dentures, and said male portions being integral with said crowns and having a length extending up to the entire mesial-distal length of the pontics of said dentures, said crowns and pontics being fixedly joined together by means of a joining medium selected from the group consisting of a time-setting material, a material curable through exposure to ultraviolet radiation, a material curable through exposure to visible light radiation, and a combination thereof.
Claim 2
Dependent Claim
102 words
Fixed partial dentures consisting of abutment crowns and pontics connected through male/female attachments fixedly-joined into unitary structures, said female portions of said attachments having a location within the pontics of said dentures, and said male portions being integral with said crowns and having a length extending up to the entire mesial-distal length of the pontics of said dentures, said crowns and pontics being fixedly joined together by means of a joining medium selected from the group consisting of a time-setting material, a material curable through exposure to ultraviolet radiation, a material curable through exposure to visible light radiation, and a combination thereof.
Claim 3
Dependent Claim
30 words
Fixed partial dentures according to claim 1 wherein said male portions have a substantially cylindrical geometry and a length not exceeding about 75% of the mesial-distal length of said pontics.
Claim 4
Dependent Claim
20 words
Fixed partial dentures according to claim 1 wherein said material is a composite resin curable through exposure to visible light.
Claim 5
Dependent Claim
19 words
Fixed partial dentures according to claim 1 consisting of two parts fixedly joined together by a single male/female attachment.
Claim 6
Dependent Claim
19 words
Fixed partial dentures according to claim 1 consisting of three parts fixedly joined together by a single male/female attachment.
Claim 7
Dependent Claim
18 words
Fixed partial dentures according to claim 1 consisting of three parts fixedly joined together by two male/female attachments.
Claim 8
Dependent Claim
30 words
Fixed partial dentures according to claim 1 wherein said portions are fabricated from materials selected from the group consisting of metals, ceramics, plastics, and fiber reinforced glasses, glass-ceramics, and metals.
Claim 9
Dependent Claim
15 words
Fixed partial dentures according to claim 1 wherein said portions are fabricated from a glass-ceramic.
Claim 10
Dependent Claim
43 words
Fixed partial dentures according to claim 8 wherein said glass-ceramic is machinable and consists essentially, expressed in terms of parts by weight on the oxide basis, of ______________________________________
K.sub.2 O
10-18 Al.sub.2 O.sub.3
0-2
MgO 14-19 ZrO.sub.2
0-7
SiO.sub.2
55-65 F 4-9
______________________________________
Claim 11
Dependent Claim
32 words
Fixed partial dentures according to claim 1 wherein said portions are fabricated from materials which permit the transmission therethrough of radiation selected from the group consisting of ultraviolet and visible light radiation.
Claim 12
Independent Claim
169 words
A method for making fixed partial dentures consisting of abutment crowns and pontics fixedly joined into unitary structures by male/female attachments, said female portions of said attachments having a location within the pontics of said dentures, and said male portions being integral with said abutment crowns and having a length extending up to the entire mesial-distal length of the pontics of said dentures, which comprises the steps of: (a) forming said parts into the desired shapes; (b) providing joining medium to said male/female attachments by means selected from the group consisting of inserting a joining medium within said female pontics and applying a joining medium to said male portions, said joining medium being selected from the group consisting of a time-setting material, a material curable through exposure to ultraviolet radiation, a material curable through exposure to visible light radiation, and a combination thereof: (c) assembling said parts together including, introducing said male portions into said female portions; and (d) curing said joining medium to fixedly join together said parts.
Claim 13
Independent Claim
169 words
A method for making fixed partial dentures consisting of abutment crowns and pontics fixedly joined into unitary structures by male/female attachments, said female portions of said attachments having a location within the pontics of said dentures, and said male portions being integral with said abutment crowns and having a length extending up to the entire mesial-distal length of the pontics of said dentures, which comprises the steps of: (a) forming said parts into the desired shapes; (b) providing joining medium to said male/female attachments by means selected from the group consisting of inserting a joining medium within said female pontics and applying a joining medium to said male portions, said joining medium being selected from the group consisting of a time-setting material, a material curable through exposure to ultraviolet radiation, a material curable through exposure to visible light radiation, and a combination thereof: (c) assembling said parts together including, introducing said male portions into said female portions; and (d) curing said joining medium to fixedly join together said parts.
Claim 14
Dependent Claim
29 words
A method according to claim 11 wherein said male portions have a substantially cylindrical geometry and a length not exceeding about 75% of the mesial-distal length of said pontics.
Claim 15
Dependent Claim
19 words
A method according to claim 11 wherein said material is a composite resin curable through exposure to visible light.
Claim 16
Dependent Claim
21 words
A method according to claim 11 wherein said dentures consist of two parts fixedly joined together by a single male/female attachment.
Claim 17
Dependent Claim
21 words
A method according to claim 11 wherein said dentures consist of three parts fixedly joined together by a single male/female attachment.
Claim 18
Dependent Claim
20 words
A method according to claim 11 wherein said dentures consist of three parts fixedly joined together by two male/female attachments.
Claim 19
Dependent Claim
29 words
A method according to claim 11 wherein said portions are fabricated from materials selected from the group consisting of metals, ceramics, plastics, and fiber reinforced glasses, glass-ceramics, and metals.
Claim 20
Dependent Claim
14 words
A method according to claim 11 wherein said portions are fabricated from a glass-ceramic.
Claim 21
Dependent Claim
42 words
A method according to claim 18 wherein said glass-ceramic is machinable and consists essentially, expressed in terms of parts by weight on the oxide basis, of: ______________________________________
K.sub.2 O
10-18 Al.sub.2 O.sub.3
0-2
MgO 14-19 ZrO.sub.2
0-7
SiO.sub.2
55-65 F 4-9
______________________________________
Claim 22
Dependent Claim
31 words
A method according to claim 11 wherein said portions are fabricated from materials which permit the transmission therethrough of radiation selected from the group consisting of ultraviolet and visible light radiation.
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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) | 1991-05-17 | 1991-11-16 | 1992-05-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-05-17 | 1995-11-16 | 1996-05-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-05-17 | 1999-11-16 | 2000-05-17 | $7700.00 | Window Closed / Lapsed |