Source: https://patents.google.com/patent/US9526549B2/en
Timestamp: 2019-12-09 11:10:50
Document Index: 142104719

Matched Legal Cases: ['Application No. 13151490', 'Application No. 13151490', 'Application No. 2011', 'Application No. 201410413164', 'Application No. 201410412613', 'Application No. 201410413073', 'Application No. 13', 'Application No. 2', 'Application No. 201410413164', 'Application No. 201410413073', 'Application No. 201410412613']

US9526549B2 - Bone screw with insert - Google Patents
Bone screw with insert Download PDF
US9526549B2
US9526549B2 US13/852,100 US201313852100A US9526549B2 US 9526549 B2 US9526549 B2 US 9526549B2 US 201313852100 A US201313852100 A US 201313852100A US 9526549 B2 US9526549 B2 US 9526549B2
US13/852,100
US20130237813A1 (en
2012-01-16 Priority to US201261586853P priority Critical
2012-03-29 Priority to US201261617067P priority
2012-05-03 Priority to US201261641900P priority
2013-01-16 Priority to US13/742,462 priority patent/US20130184765A1/en
2013-03-28 Application filed by Carbofix Orthopedics Ltd filed Critical Carbofix Orthopedics Ltd
2013-03-28 Priority to US13/852,100 priority patent/US9526549B2/en
2013-04-10 Assigned to CARBOFIX ORTHOPEDICS LTD. reassignment CARBOFIX ORTHOPEDICS LTD. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: BEYAR, MORDECHAY, GLOBERMAN, OREN
2013-09-12 Publication of US20130237813A1 publication Critical patent/US20130237813A1/en
2016-12-27 Publication of US9526549B2 publication Critical patent/US9526549B2/en
210000000988 Bone and Bones Anatomy 0 abstract claims description title 102
238000005520 cutting process Methods 0 abstract claims description 87
238000010079 rubber tapping Methods 0 claims description 22
This application is also related to a co-filed U.S. Continuation-in-Part (CIP) patent application titled “Bone Screw Head Design” and having U.S. Ser. No. 13/852,145.
In some embodiments, insert 103 extends longitudinally within the interior of the screw, for example extending to at least 5%, 20%, 40%, or 70% or intermediate or larger values of the total length of the screw. Optionally, the length of the insert along a longitudinal axis is determined according to the pitch of the thread and\or the number of cutting edges that are covered by extensions of insert 103. For example, if the pitch of thread 111 is 2 mm, and insert 103 covers the 3 cutting edges at the distal portion of the screw, then the length of the insert may be 6 mm. In another example, insert 103 may extend half way through the total length of the screw, beginning at the distal tip 117 and extending in a proximal direction towards the head of the screw, for example to a distance of at least 3 mm, 5 mm, 30 mm or intermediate or larger distances. Optionally, the total length of the screw ranges between 10 mm-120 mm.
In some embodiments, insert 103 is formed as a thin sheet. Optionally, the thickness of the insert ranges between 0.1 mm-0.5 mm. In some embodiments, the thickness of insert 103 may change, for example change along a longitudinal axis. Optionally, the thickness gradually decreases such that a distal portion of the insert is thicker than a proximal portion. Optionally, a thick distal end of the insert provides a harder front end at the screw's tip, which may facilitate driving the screw into the bone, as shown in the following figure.
In some embodiments, as distal portion 201 followed by the rest of the screw is driven into bone 205, cutting edges 207, 209, 211 which are optionally covered by insert 203 cut a thread within bone 205, allowing the threading of the rest of screw 201 into bone 205.
In some embodiments, insert 303 is a thin sheet, for example having a thickness of 0.1 mm. In some embodiments, the insert may have a thickness of, for example, 0.5 mm, 1 mm, 3 mm or any larger and/or intermediate thickness. In some embodiments, the thickness of the insert gradually changes, for examples decreases along a longitudinal axis. In some embodiments, an extension of the insert may be thicker than other portions of the insert, or vice versa. In some embodiments, the thickness may change according to a shape of the thread. In some embodiments, the thickness may be determined according to a diameter of the screw, for example the major diameter, for example being ¼ of the screw diameter.
FIG. 4F shows extension 401 of an embedded insert having a thick three dimensional cuboidal shape, which may be used for example to fit within a volume of a thread having a similar profile. In this example, a thickness of the extension, may range between, for example, 0.5 mm-3 mm.
At 703, an insert is placed in the mold. Optionally, the insert is attached to the mold using, for example, a break-off piece. Optionally, the break off piece is removed from the insert at the end of the molding procedure, once the insert is embedded within the screw, as will be explained in the following figure.
1. A composite material bone screw comprising:
a head configured at a proximal end of said screw;
a body extending from said head to a distal end of said screw, said body at least partially threaded;
an insert, said insert at least partially embedded within a distal portion of said body, wherein at least 60% of a total volume of said insert is enclosed within said composite material of said body, and wherein at least 60% of total surface area of said insert contacts said composite material of said body.
7. The insert according to claim 1, wherein said insert is sandwiched between two portions of said body.
9. The insert according to claim 1, wherein said insert extends at least 3 mm along a long axis of the screw.
10. The insert according to claim 1, wherein said insert extends at least 2 mm along a diameter of the screw.
11. The insert according to claim 9, wherein said insert extends to the distal tip of said screw.
12. The screw according to claim 1, wherein said composite material comprises a fiber-reinforced polymer matrix.
13. The insert according to claim 1, wherein said insert is harder than a cortical bone.
14. The insert according to claim 1, wherein said insert is harder than said composite material of said body.
15. The screw according to claim 1, wherein at least one of said screw body and said insert comprises a radiopaque material thick enough for visualizing under fluoroscopy.
16. The insert according to claim 1, wherein said insert comprises holes extending between opposite faces of said insert.
17. The insert according to claim 16, wherein said holes are filled with a material of which said screw is made.
18. The screw according to claim 1, wherein said screw comprises a cutting flute.
19. The screw according to claim 1, wherein said screw is a lag screw.
20. The screw according to claim 1, wherein a thin hard foil covers at least 70% of a thread of said screw, and does not cover said insert.
21. The screw according to claim 1, wherein said insert is embedded within said distal portion of said body such that most of said insert does not extend axially past said distal end of said composite material body.
US13/852,100 2012-01-16 2013-03-28 Bone screw with insert Active 2034-06-22 US9526549B2 (en)
US201261586853P true 2012-01-16 2012-01-16
US201261617067P true 2012-03-29 2012-03-29
US201261641900P true 2012-05-03 2012-05-03
US13/742,462 US20130184765A1 (en) 2012-01-16 2013-01-16 Multi-axial bone plate fixation
US13/852,100 US9526549B2 (en) 2012-01-16 2013-03-28 Bone screw with insert
US13/742,462 Continuation-In-Part US20130184765A1 (en) 2012-01-16 2013-01-16 Multi-axial bone plate fixation
US20130237813A1 US20130237813A1 (en) 2013-09-12
US9526549B2 true US9526549B2 (en) 2016-12-27
ID=49114701
US13/852,100 Active 2034-06-22 US9526549B2 (en) 2012-01-16 2013-03-28 Bone screw with insert
US (1) US9526549B2 (en)
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Owner name: CARBOFIX ORTHOPEDICS LTD., ISRAEL
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:BEYAR, MORDECHAY;GLOBERMAN, OREN;REEL/FRAME:030183/0703