US5151103A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Point contact bone compression plate
Assignee: Synthes USA LLC
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Filing: 1991-02-28
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Granted: 1992-09-29
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Expires: 2011-02-28
Abstract
Abstract A bone plate for use in osteosynthesis having a plurality of contact elements extending from its lower surface so that contact between plate and bone is reduced to the minimum contact needed during attachment of the plate to a bone.
Inventors
- 👤 Slobodan Tepic
- 👤 Stephen Perren
- 👤 Fritz Straumann
- 👤 Franz Sutter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 05:10
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/56; A61B17/58; A61B17/68; A61B17/80; A61B17/8052; A61B17/8033; A61B17/8047; A61B17/8028; A61B17/809
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
99 words
An implant for osteosynthesis comprising a biocompatible device for attachment to a bone, and a plurality of screws for attaching the device to the bone, the heads of said screws and the device having a predetermined friction angle relative to one another, said screws having conical heads and said device having complementary conical holes for receiving said heads in surface contact therewith, the cone angle of the conical holes being less than the friction angle between the holes and the screw head, thereby locking said screws to said device to prevent said device from sliding down the screw heads.
Claim 2
Dependent Claim
99 words
An implant for osteosynthesis comprising a biocompatible device for attachment to a bone, and a plurality of screws for attaching the device to the bone, the heads of said screws and the device having a predetermined friction angle relative to one another, said screws having conical heads and said device having complementary conical holes for receiving said heads in surface contact therewith, the cone angle of the conical holes being less than the friction angle between the holes and the screw head, thereby locking said screws to said device to prevent said device from sliding down the screw heads.
Claim 3
Dependent Claim
23 words
The implant claimed in claim 1, wherein the cone defining the hole has a cone taper of from about 1:5 to about 1:20.
Claim 4
Dependent Claim
32 words
The implant claimed in claim 1, wherein said device includes a plurality of clearance holes, each of said clearance holes having a compressible insert, each insert having one of said conical holes.
Claim 5
Dependent Claim
11 words
The implant claimed in claim 1, wherein the screws are self-tapping.
Claim 6
Dependent Claim
32 words
The implant claimed in claim 1, wherein the length of the screws are such that they will engage only one of the cortices of the bone to which the device is applied.
Claim 7
Dependent Claim
24 words
The implant claimed in claim 1, wherein the contact of the underside of said device with said bone is at a plurality of points.
Claim 8
Dependent Claim
39 words
The implant claimed in claim 1, wherein the device has a undersurface for application to the surface of a bone to be treated, the bone contact areas of said undersurface being less than 5% of the full undersurface area.
Claim 9
Dependent Claim
20 words
The implant claimed in claim 7, wherein the bone contact area is less than 2% of the full undersurface area.
Claim 10
Dependent Claim
29 words
Implant as claimed in claim 7, wherein the bone contact areas of the undersurface consist of contact studs made of a material which resorbable or dissoluble in body fluids.
Claim 11
Dependent Claim
23 words
The implant claimed in claim 1 and comprising clip-on springs mounted on said device and forming extensions on the undersurface of said device.
Claim 12
Dependent Claim
12 words
The implant claimed in claim 1, wherein said device is a plate.
Claim 13
Dependent Claim
31 words
The implant claimed in claim 1, wherein the heads of said screws have sockets and including elements for insertion into the sockets of said screw heads to expand said screw heads.
Claim 14
Dependent Claim
15 words
The implant claimed in claim 1, wherein the device includes a self compressing screw hole.
Claim 15
Dependent Claim
14 words
The implant claimed in claim 13, wherein the device includes a self-compressing screw hole.
References Cited (Backward Citations)
DE2933637A1
Cited
EP0048038A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-09-29 | 1996-03-30 | 1996-09-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-09-29 | 2000-03-30 | 2000-09-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-09-29 | 2004-03-30 | 2004-09-29 | $7700.00 | Window Closed / Lapsed |