Patent US5971985A successfully refreshed from Google Patents.
US5971985A
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US
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Bone attachment device for use with tissue grafts and membranes
Assignee: ACE Surgical Supply Co Inc
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Filing: 1997-09-12
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Granted: 1999-10-26
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Expires: 2017-09-12
Abstract
Abstract A self-locking and threaded bone tack screw device (10) for fixing and retaining tissue grafts and synthetic membranes directly to a maxillofacial bone graft site. The tack has an oversized cylindrical dome shaped head (14) for retaining the tissue and synthetic membrane to the bone graft site and a hexagonal recess (14a) for easy insertion and removal of the device. The tip of the device incorporates a sharp pin point (12a) to easily pierce the tissue and membrane and initially penetrate into the bone graft site. A locking flange (12c) locks into the bone graft site in a single direction. A self-tapping screw thread (12f) is provided for driving the pin point tip into the bone graft site. Incorporation of the self-locking pin point tip in series with the self-tapping thread allows the hexagonal tool driven bone tack to be easily inserted and removed from the graft site without compromising its fixation.
Inventors
- 👤 Joseph E. Carchidi
- 👤 Alan R. Balfour
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:25
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/28; A61F2/2846; A61B; A61B17/00; A61B17/064; A61B17/0642; A61B17/068; A61B17/56; A61B17/58; A61B17/68; A61B17/84; A61B17/86; A61B17/8605; A61B17/8625; A61B17/8635; A61B17/88; A61B17/8875; A61B17/8886; A61B17/8888; A61F2/30; A61F2/46; A61F2/4603; A61B2017/0647; A61B2017/0648; A61C; A61C8/00; A61C8/0003; A61C8/0004; A61C8/0006; A61C8/0018; A61C8/0022; A61F2/2803; A61F2/30721; A61F2/30749; A61F2002/285; A61F2002/30001; A61F2002/30108; A61F2002/3011; A61F2002/30138; A61F2002/30143; A61F2002/30316; A61F2002/30535; A61F2002/30604; A61F2002/30616; A61F2/30767; A61F2/30771; A61F2002/30795; A61F2002/4619; A61F2220/00; A61F2220/0008; A61F2230/00; A61F2230/0002; A61F2230/0017; A61F2250/00; A61F2250/0058; A61F2250/006; A61F2250/0064
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
237 words
An attachment device for retaining tissue and synthetic membranes to a bone graft site comprising: an elongated cylindrical body member extending along a longitudinal axis from a first end to a second, opposite end with reference to a selected direction taken along the longitudinal axis, the first end formed with a pin point tapering up to a first diameter forming a first axial length portion, a second axial length portion extending from the first axial length portion and increasing in diameter at a given angle with respect to the selected direction to a second diameter, a third axial length portion forming a tapered locking flange increasing diameter at a greater angle with respect to the selected direction then the given angle, the locking flange extending from the second diameter to a third diameter having a third axial length and having a locking surface extending around the periphery generally perpendicular to the longitudinal axis at the third diameter extending radially inwardly to a fourth axial length portion having a fourth diameter extending from the third axial length portion and an additional axial length portion having a self-tapping thread and a relatively enlarged tissue and membrane retaining head formed at the second end, the head having a step portion having a selected diameter greater than the fourth diameter and less than the diameter of the head and having a selected axial length to inhibit bone growth over the head.
Claim 2
Dependent Claim
237 words
An attachment device for retaining tissue and synthetic membranes to a bone graft site comprising: an elongated cylindrical body member extending along a longitudinal axis from a first end to a second, opposite end with reference to a selected direction taken along the longitudinal axis, the first end formed with a pin point tapering up to a first diameter forming a first axial length portion, a second axial length portion extending from the first axial length portion and increasing in diameter at a given angle with respect to the selected direction to a second diameter, a third axial length portion forming a tapered locking flange increasing diameter at a greater angle with respect to the selected direction then the given angle, the locking flange extending from the second diameter to a third diameter having a third axial length and having a locking surface extending around the periphery generally perpendicular to the longitudinal axis at the third diameter extending radially inwardly to a fourth axial length portion having a fourth diameter extending from the third axial length portion and an additional axial length portion having a self-tapping thread and a relatively enlarged tissue and membrane retaining head formed at the second end, the head having a step portion having a selected diameter greater than the fourth diameter and less than the diameter of the head and having a selected axial length to inhibit bone growth over the head.
Claim 3
Dependent Claim
26 words
An attachment device according to claim 1 in which the screw thread includes a cutting flute along a portion of the axial length of the thread.
Claim 4
Dependent Claim
19 words
An attachment device according to claim 1 in which the head has an axial length of approximately 0.036/0.034 inch.
Claim 5
Dependent Claim
26 words
An attachment device according to claim 1 in which the head has a diameter approximately five times the fourth diameter of the fourth axial length portion.
Claim 6
Dependent Claim
19 words
An attachment device according to claim 1 in which the head has a non-circular, tool receiving recess formed therein.
Claim 7
Dependent Claim
62 words
An attachment device according to claim 1 in which the overall length is between approximately 0.124 and 0.202 inch and the diameter of the head is approximately 0.0985/0.0975 inch, the diameter of the step portion is 0.070 inch and the axial length of the head is approximately 0.036/0.034 inch, the fourth diameter of the fourth axial length portion is approximately 0.019/0.017 inch.
Claim 8
Dependent Claim
20 words
An attachment device according to claim 6 in which the fourth axial length is between approximately 0.005 and 0.083 inch.
Claim 9
Dependent Claim
30 words
An attachment device according to claim 1 in which an axial length of a selected amount is formed between the additional axial length portion and the head for thread relief.
Claim 10
Dependent Claim
218 words
An attachment device for retaining tissue and synthetic membranes to a bone graft site comprising: an elongated cylindrical body member extending along a longitudinal axis from a first end to a second, opposite end with reference to a selected direction taken along the longitudinal axis, the first end formed with a pin point tapering up to a first diameter forming a first axial length portion, a second axial length portion extending from the first axial length portion, a tapered locking flange diameter with respect to the first direction extending from a second diameter at the second axial length portion to a third diameter defining a third axial length portion and having a locking surface generally perpendicular to the longitudinal axis at the third diameter extending generally radially inwardly to a fourth axial length portion having a fourth diameter, an additional axial length portion extending from the fourth axial length portion having a self-tapping thread and a relatively enlarged tissue and membrane retaining head formed at the second end, the head having a diameter approximately five times larger than the fourth diameter, and the head having a step portion having a selected diameter greater than the fourth diameter and less than the diameter of the head and having a selected axial length to inhibit bone growth over the head.
Claim 11
Dependent Claim
218 words
An attachment device for retaining tissue and synthetic membranes to a bone graft site comprising: an elongated cylindrical body member extending along a longitudinal axis from a first end to a second, opposite end with reference to a selected direction taken along the longitudinal axis, the first end formed with a pin point tapering up to a first diameter forming a first axial length portion, a second axial length portion extending from the first axial length portion, a tapered locking flange diameter with respect to the first direction extending from a second diameter at the second axial length portion to a third diameter defining a third axial length portion and having a locking surface generally perpendicular to the longitudinal axis at the third diameter extending generally radially inwardly to a fourth axial length portion having a fourth diameter, an additional axial length portion extending from the fourth axial length portion having a self-tapping thread and a relatively enlarged tissue and membrane retaining head formed at the second end, the head having a diameter approximately five times larger than the fourth diameter, and the head having a step portion having a selected diameter greater than the fourth diameter and less than the diameter of the head and having a selected axial length to inhibit bone growth over the head.
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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) | 2002-10-25 | 2003-04-26 | 2003-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2006-10-25 | 2007-04-26 | 2007-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2010-10-25 | 2011-04-26 | 2011-10-26 | $7700.00 | Window Closed / Lapsed |