US20020052605A1
Expired / Lapsed
US
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Cortical bone interference screw
Assignee: Regeneration Technologies Inc
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Filing: 2001-05-24
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Granted: —
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Expires: 2021-05-24
Abstract
Abstract An interference screw is provided by machining a fragment of autograft, allograft or xenograft cortical bone from a donor or from a recipient's amputated bone. The interference screw has a cortical surface into which a self-tapping thread is machined. The interference screw has a machined pointed, rounded or flush end and an opposite machined end which mates with a drive means, and has advantages over conventional interference screws known in the art in that subsequent to implantation, no residual hardware that must later be removed remains at the implant site.
Inventors
- 👤 Jamie Grooms
- 👤 Kevin Carter
- 👤 David Dulebohn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 04:10
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/56; A61B17/58; A61B17/68; A61B17/84; A61B17/86; A61B17/8605; A61B17/861; A61B17/862; A61B17/866; A61B17/88; A61B17/8875; A61B17/8877; A61B17/8883; A61B17/8886; A61B17/8891; A61B17/8625; A61B17/8635; A61B17/864; A61B17/8645; A61F; A61F2/00; A61F2/02; A61F2/08; A61F2/0805; A61F2/0811; A61F2/30; A61F2/30767; A61F2/30771; A61F2002/3085; A61F2002/30866
Claims Analysis
Total Claims: 36
Claim 1
Independent Claim
12 words
1 . An allograft, autograft or xenograft interference screw comprised of bone.
Claim 2
Dependent Claim
12 words
1 . An allograft, autograft or xenograft interference screw comprised of bone.
Claim 3
Dependent Claim
14 words
2 . The interference screw of claim 1 wherein said bone is cortical bone.
Claim 4
Dependent Claim
29 words
3 . The interference screw of claim 2 comprising a machined and threaded bone fragment obtained as an allograft, xenograft or autograft from the cortex of a donor's bone.
Claim 5
Dependent Claim
24 words
4 . The interference screw of claim 3 having a pointed, a rounded or a flush forward end and a thread which is self-tapping.
Claim 6
Dependent Claim
27 words
5 . The interference screw of claim 4 wherein the end opposite the pointed, rounded or flush end has a machined drive-head matable with a drive socket.
Claim 7
Dependent Claim
54 words
6 . The interference screw of claim 5 having a machined structure matable with a drive socket wherein the shape of the machined drive-head is selected from the group consisting of a tapered, a square, a hexagon, a recessed square, a sunken groove, a recessed hexagon, a bone shape and a twister shaped head.
Claim 8
Dependent Claim
20 words
7 . The interference screw of claim 1 having a length of between about 8 mm to about 70 mm.
Claim 9
Dependent Claim
20 words
8 . The interference screw of claim 1 having a diameter of between about 2 mm and about 30 mm.
Claim 10
Dependent Claim
13 words
9 . The interference screw of claim 8 wherein the diameter is tapered.
Claim 11
Dependent Claim
23 words
10 . The interference screw of claim 1 having a pitch between about 5 threads per inch to about 40 threads per inch.
Claim 12
Dependent Claim
68 words
11 . A method of making an interference screw which comprises machining a cortical fragment of a donor's femur or tibia, said fragment having a diameter of between about 2 mm and about 30 mm and a length of between about 8 mm and about 70 mm, such that the resulting screw has a thread cut thereon to allow the fragment to be screwed into a recipient's bone.
Claim 13
Dependent Claim
68 words
11 . A method of making an interference screw which comprises machining a cortical fragment of a donor's femur or tibia, said fragment having a diameter of between about 2 mm and about 30 mm and a length of between about 8 mm and about 70 mm, such that the resulting screw has a thread cut thereon to allow the fragment to be screwed into a recipient's bone.
Claim 14
Dependent Claim
32 words
12 . The method of claim 11 further comprising machining a drive-head into one end of the screw and a pointed, rounded or flush end at the forward end of the screw.
Claim 15
Dependent Claim
25 words
13 . The method of claim 11 which further comprises drilling a channel through the entire length of the bone to produce a cannulated screw.
Claim 16
Dependent Claim
13 words
14 . An interference screw made by the process of claim 11 .
Claim 17
Dependent Claim
42 words
15 . A method for securing an implant which comprises drilling a cavity in the implant recipient's bone at or adjacent to the implant site and inserting therein an allograft, xenograft or autograft cortical interference screw, thereby locking the implant into place.
Claim 18
Dependent Claim
42 words
15 . A method for securing an implant which comprises drilling a cavity in the implant recipient's bone at or adjacent to the implant site and inserting therein an allograft, xenograft or autograft cortical interference screw, thereby locking the implant into place.
Claim 19
Dependent Claim
21 words
16 . The method of claim 15 wherein the implant is a ligament implant in an anterior cruciate ligament surgical procedure.
Claim 20
Dependent Claim
20 words
17 . The method of claim 16 wherein the implant is a cortical bone plate having screw holes machined therein.
Claim 21
Dependent Claim
49 words
18 . The interference screw of claim 1 prepared by a process comprising machining a cortical fragment from a donor's femur or tibia, said fragment having a diameter of between about 2 mm and about 30 mm and a length of between about 8 mm and about 70 mm.
Claim 22
Dependent Claim
43 words
19 . The interference screw of claim 18 wherein said process of preparation further comprises machining one end of said fragment to form a pointed, rounded or flush end, and machining the opposite end so as to mate with a rotatable drive means.
Claim 23
Dependent Claim
31 words
20 . The interference screw of claim 19 wherein the end opposite the screw tip is machined into a bone-shaped head, a twister-shaped head, or a head having a recessed groove.
Claim 24
Dependent Claim
59 words
21 . The interference screw of claim 20 wherein the bone-shaped head, twister-shaped head, or head with a recessed groove mates with a rotatable drive means, said drive means comprising a shaft and a drive slot into which the bone screw head fits, to thereby provide a purchase to apply torque to insert the screw into a recipient's bone.
Claim 25
Dependent Claim
32 words
22 . A bone interference screw driver comprising a shaft, a recessed drive slot into which a bone-head shaped, twister-head shaped bone screw head, or screw head having a recessed groove fits.
Claim 26
Dependent Claim
32 words
22 . A bone interference screw driver comprising a shaft, a recessed drive slot into which a bone-head shaped, twister-head shaped bone screw head, or screw head having a recessed groove fits.
Claim 27
Dependent Claim
85 words
23 . The bone interference screw driver of claim 22 comprising an outer shaft, an inner, independently rotatable shaft, a pair of lugs extending from the outer shaft into the recessed drive slot, a pair of forwardly extending prongs extending from said inner drive shaft, and a pair of interlocking handles such that the head of a cortical bone screw may be pinched and retained in the driver head by opposing forces applied by said pair of lugs and said pair of forwardly extending prongs.
Claim 28
Dependent Claim
11 words
24 . The interference screw of claim 1 which is cannulated.
Claim 29
Dependent Claim
21 words
25 . The interference screw of claim 24 wherein the screw is machined so as to have an internal drive feature.
Claim 30
Dependent Claim
31 words
26 . The interference screw of claim 25 wherein said internal drive feature is in the form of an internal hexagonal drive, an internal square drive, or an internal elliptical drive.
Claim 31
Dependent Claim
35 words
27 . The interference screw of claim 26 wherein said internal drive is formed by broaching a cannulation in the screw to form said internal drive feature throughout the entire longitudinal axis of the screw.
Claim 32
Dependent Claim
15 words
28 . The interference screw of claim 1 which is demineralized or is partially demineralized.
Claim 33
Dependent Claim
12 words
29 . A cortical bone fixation plate having screw holes machined therein.
Claim 34
Dependent Claim
12 words
29 . A cortical bone fixation plate having screw holes machined therein.
Claim 35
Dependent Claim
17 words
30 . The bone fixation plate of claim 29 wherein the screw holes are counter-sunk or tapered.
Claim 36
Dependent Claim
15 words
31 . The bone fixation plate of claim 29 which is demineralized or partially demineralized.
References Cited (Backward Citations)
US5354299A
Cited
US6283973B1
Cited
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