US4460336A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Orthodontic attachments
Assignee: Individual
•
Filing: 1982-07-27
•
Granted: 1984-07-17
•
Expires: 2002-07-27
Abstract
Abstract Orthodontic brackets or other dental attachments are provided with particulate material on the tooth engaging surface thereof to improve the bonding of bracket to a tooth surface. The particulate material consists of metal spheres joined to each other and to the tooth engaging surface at their points of contact therewith.
Inventors
- 👤 Dennis C. Smith
- 👤 Rolf Maijer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 04:55
CPC Classifications
A; A61; A61C; A61C7/00; A61C7/12; A61C7/14; A61C7/16
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
128 words
An orthodontic bracket comprising an attachment base for the adhesion of said bracket to a tooth and having a tooth engaging surface varying in size from about 3 mm in diameter to an area of about 4×8 mm, and a porous coating on said tooth engaging surface consisting of metal spheres joined to each other and to said tooth engaging surface at their points of contact therewith, said porous coating having a thickness of about 50 to about 300 microns and a porosity of about 10 to about 50 volume %, spheres having a particle size of -100 mesh, and said porous coating, the interface between said porous coating and said tooth engaging surface and said tooth engaging surface having a structural strength of at least 8 MPa.
Claim 2
Dependent Claim
128 words
An orthodontic bracket comprising an attachment base for the adhesion of said bracket to a tooth and having a tooth engaging surface varying in size from about 3 mm in diameter to an area of about 4×8 mm, and a porous coating on said tooth engaging surface consisting of metal spheres joined to each other and to said tooth engaging surface at their points of contact therewith, said porous coating having a thickness of about 50 to about 300 microns and a porosity of about 10 to about 50 volume %, spheres having a particle size of -100 mesh, and said porous coating, the interface between said porous coating and said tooth engaging surface and said tooth engaging surface having a structural strength of at least 8 MPa.
Claim 3
Dependent Claim
16 words
The bracket of claim 1 wherein said metal spheres have a particle size of -300 mesh.
Claim 4
Dependent Claim
16 words
The bracket of claim 1 wherein said metal spheres have a particle size of -500 mesh.
Claim 5
Dependent Claim
12 words
The bracket of claim 1, 2 or 3 constructed of stainless steel.
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) | 1987-07-17 | 1988-01-16 | 1988-07-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-07-17 | 1992-01-16 | 1992-07-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-07-17 | 1996-01-16 | 1996-07-17 | $7700.00 | Window Closed / Lapsed |