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Self-tapping biocompatible interference bone screw

a biocompatible, bone screw technology, applied in the field of soft tissue or bone-to-bone fixation devices, can solve problems such as interfering bone graft fit, and achieve the effects of reducing confusion, improving interference screw pull-out strength, and increasing density

Inactive Publication Date: 2013-08-08
CAYENNE MEDICAL INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The self-tapping PEEK screw eliminates the need for additional preparatory steps, provides higher pull-out strength, and ensures secure fixation in ACL reconstruction procedures, reducing recovery time and minimizing the risk of screw loosening during cyclic loading.

Problems solved by technology

The interference fit between the bone graft and tunnel wall occurs as the thread of the screw forwardly propels the screw body into the bone.

Method used

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  • Self-tapping biocompatible interference bone screw
  • Self-tapping biocompatible interference bone screw
  • Self-tapping biocompatible interference bone screw

Examples

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Embodiment Construction

[0029]Referring now more particularly to the drawings, there is shown in FIG. 1 an interference screw anchoring system 10, which comprises an interference screw 12, a driver 14, and a guide wire 16, along which the driver 14 and interference screw 12 may be guided to a desired operative site.

[0030]The inventive interference screw 12 is intended for the bone-patellar tendon-bone reconstruction of the ACL, but may be used in other applications as well. During an ACL reconstruction procedure, BPTB grafts are fixed to the femur and tibia, utilizing the inventive interference screw 12. BPTB grafts are typically harvested from the patient's ipsilateral leg, but cadaveric grafts are also acceptable. The interference screw is packaged sterile, and is designed to provide compression of a BPTB graft within the femoral and tibial tunnels at the procedural site. The driver 14, and other system components comprising the instrument set 10 are designed to be reusable. A disposable kit provided wit...

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PUM

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Abstract

A biocompatible interference screw for soft tissue or bone-to-bone fixation comprises a screw body extending from a screw head to a distal tip of the screw. The screw body has an outer surface, and comprises polyether-ether-ketone (PEEK) material. Advantageously, the body outer surface has a textured surface finish for substantially improving pull-out strength of the interference screw. The textured surface finish is textured, in preferred embodiments, with a minimum of approximately 16 micro inches of surface roughness. The screw head comprises a tapered square keyhole for receiving a distal end of a driver instrument. The screw comprises a series of threads, which have a relatively smooth profile, in order to prevent graft tissue laceration as the screw is being inserted. The distal tip of the screw body comprises a narrow tip, and a distal end of the screw body is angled inwardly toward the narrow distal tip.

Description

[0001]This application claims the benefit under 35 U.S.C. 119(e) of the filing date of Provisional U.S. Application Ser. No. 61 / 025,250, entitled Self Tapping Biocompatible Interference Bone Screw, filed on Jan. 31, 2008, which application is expressly incorporated herein by reference, in its entirety.BACKGROUND OF THE INVENTION[0002]The present invention relates to soft tissue or bone-to-bone fixation devices, and more particularly to those comprised from the biocompatible polymer polyether-ether-ketone (PEEK).[0003]Current biocompatible polymeric screws, such as those comprised of poly-1-lactide acid (PLLA) or poly-lactide acid (PLA), lack the durability to be inserted into cancellous bone without the additional step of manually tapping the implant site intended to receive the bone screw with a surgical bone tap. Though screws created from these materials possess the desired characteristics of radiolucency and MRI compatibility, the additional procedural step of tapping is often d...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): A61B17/86
CPCA61B17/8615A61B17/8635A61B17/864A61B17/888A61B17/861A61F2002/0858A61F2002/0882A61B17/8605A61F2/0811
Inventor HOOF, JORDAN A.BAIRD, KEVIN N.HARPER, DEREK J.
Owner CAYENNE MEDICAL INC
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