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Implant with an interference fit fastener

A technology for fasteners and implants, applied in the field of implants, can solve the problems of the clasp detaching from the implant, and it is difficult to determine that the protruding piece is positioned on the fastener.

Inactive Publication Date: 2012-05-30
WARSAW ORTHOPEDIC INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Disadvantages of these mechanisms include that the buckle may dislodge from the implant and that the buckle may not spring back over the fastener
The disadvantage of this design is that it requires an additional step by the surgeon after inserting the fastener
It is also difficult for the surgeon to determine if the tab is properly positioned over the fastener

Method used

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  • Implant with an interference fit fastener
  • Implant with an interference fit fastener
  • Implant with an interference fit fastener

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0033] The present application relates to implants with self-locking bone fasteners, wherein the self-locking bone fasteners attach the implant to bone. The implant includes a channel for receiving the fastener. The sidewalls of the implant and the fastener include different durometers such that one will change when the fastener is inserted into the implant. The variation creates an interference fit between the fastener and the implant to prevent withdrawal of the fastener.

[0034] figure 1 Fastener 20 is shown schematically, dimensioned to fit within channel 40 of implant 30 . Fastener 20 is used to extend through channel 40 and attach implant 30 to bone 100 . Fastener 20 includes an interference section 72 having a larger diameter than interference section 70 of channel 40 . Fastener 20 is also constructed of a material that has a different hardness than interference segment 70 . When the fastener 20 enters the channel 40, one of the interfering segments 70, 72 changes...

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PUM

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Abstract

An implant with an interference fit fastener for attaching the implant to a bone. The interference fit prevents backout of the fastener after the attachment. The implant may include a passage with a first end and second end. The passage may include a first interference section between the first and second ends. A fastener with an elongated shape may be sized to extend through the passage to attach the implant to the bone. The fastener may include a second interference section. During insertion of the fastener through the passage and into the bone, the second interference section of the fastener may contact against and modify or be modified by the first interference section of the passage. This modification may create the interference fit between the implant and the fastener that prevents backout. The interference sections may remain in contact or may move apart once the fastener is fully attached to the bone.

Description

technical field [0001] This application relates to implants attached to bone by fasteners, and more particularly, to fasteners and implants having varying durometers that tighten when inserted through channels in the implant. One of the firmware and the implant is changed to create an interference fit. Background technique [0002] Various types of implants are inserted into the patient and attached to the bone by fasteners. A fastener extends through the implant and into the bone, thereby holding the implant against the bone. The fastener can also be configured to apply pressure to the implant. Implants and fasteners should be constructed to prevent loosening of the fasteners, which would otherwise dislodge from the bone and / or implant. This retreating movement of the fastener relative to the bone and / or implant is referred to as backing out. Back out can be caused by the bone sinking, or the fastener loosening from the bone after the implant is attached. [0003] Mech...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B17/86A61B17/80A61F2/44
CPCA61F2002/30794A61B17/8052A61F2/4455A61F2/4425A61F2002/30517A61F2220/0025A61F2250/0019A61F2002/30016A61F2310/00017A61F2002/30787A61F2310/00023A61F2002/30578A61F2/30749A61B17/863A61B17/8625A61F2002/4475A61F2220/0008A61F2002/30649A61F2/30965A61F2002/30593A61F2002/3079A61B17/7059A61B17/8605A61B2017/00955
Inventor A·J·麦尔肯特T·A·卡利斯L·G·沃戈
Owner WARSAW ORTHOPEDIC INC