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US6398786B1 Expired / Lapsed US ⏱️ 0.0 years remaining

Strain-inducing conical screw for stimulating bone transplant growth

Assignee: Individual
•
Filing: 1998-10-06
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Granted: 2002-06-04
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Expires: 2018-10-06
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Abstract

Abstract The invention involves a differential and/or conical screw of a variable increasing pitch which is used for the initial mechanical stimulation of a healthy bone, in order to induce a new internal strain and the consequential biological reaction of the bone. The biological reaction results in the formation of a new, young superficial bone, and the process takes between 4 and 8 weeks. The new bone is used as an autologous bone transplant. The transplantation of this new bone into other parts of the body, where such a procedure is indicated, is a new method referred to as adaptive periosteal cambiplasty. The process of the implantation of the screws into the bone is controlled with the use of a special moment key, which provides for the induction of a defined and desired stimulation force, and it also provides for the safety of the method.

Inventors

  • 👤 Nenad Sesic

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-23 20:16
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/56; A61B17/58; A61B17/88; A61B17/8875; A61B17/16; A61B17/17; A61B17/68; A61B17/84; A61B17/86; A61B17/8625; A61B17/863; A61B17/8605

Claims Analysis

Total Claims: 9
Claim 1
Independent Claim 57 words
A differential conical screw, comprising a cylindrical lower portion and a conical upper portion, each of said lower portion and said upper portion comprising screw threads, wherein said cylindrical lower portion extends over a distance of between two to five screw threads, and wherein said conical upper portion comprises a screw thread which is of increasing pitch.
Claim 2
Dependent Claim 57 words
A differential conical screw, comprising a cylindrical lower portion and a conical upper portion, each of said lower portion and said upper portion comprising screw threads, wherein said cylindrical lower portion extends over a distance of between two to five screw threads, and wherein said conical upper portion comprises a screw thread which is of increasing pitch.
Claim 3
Dependent Claim 18 words
A differential conical screw according to claim 1 , wherein said increasing pitch is a constantly increasing pitch.
Claim 4
Dependent Claim 18 words
A differential conical screw according to claim 1 , wherein said increasing pitch is a variable thread pitch.
Claim 5
Dependent Claim 21 words
A differential conical screw according to any one of claims 1 to 3 , wherein said screw comprises a sextant-shaped head.
Claim 6
Dependent Claim 33 words
A differential conical screw according to any one of claims 1 to 3 , wherein said screw includes a rounded head with adjoining flat side peripheral surfaces for engagement with a hexagonal socket.
Claim 7
Dependent Claim 21 words
A differential conical screw according to any one of claims 1 to 3 , wherein said screw comprises a Phillips head.
Claim 8
Dependent Claim 32 words
A differential conical screw according to any one of claims 1 to 3 , wherein said screw is formed without a head, for direct connection to a screwdriver via a hexagonal socket.
Claim 9
Dependent Claim 41 words
A differential conical screw according to any one of claims 1 to 3 , wherein said screw is constructed from stainless steel bone implant material ISO 5832/6 or 5832/IV or 5832-8 or from a titanium alloy material for implants ISO 5832-3.

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 2005-06-03 2005-12-03 2006-06-04 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 2009-06-03 2009-12-03 2010-06-04 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 2013-06-03 2013-12-03 2014-06-04 $7700.00 Window Closed / Lapsed

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