US 8,998,925 B2Granted

Fixation system for orthopedic devices

AssigneeRDC Holdings, LLC

InventorKarl Schwappach

Life of this patent

Estimating the term…

Loading patent…

Abstract

A fixation system configured to releasably secure an orthopedic implant to a bone. The orthopedic implant has at least one lumen extending from a proximal portion to a distal portion configured to extend through cortical portions and into cancellous portions of the bone. The fixation system includes a flowable biomaterial that flows through the lumen into the cancellous portion of the bone in an expanded configuration with at least one dimension greater than a corresponding dimension on the orthopedic implant located generally along a pull-out direction of the orthopedic implant. An insert is positioned in the lumen and in engagement with the flowable biomaterial located in the cancellous portion of the bone, such that the orthopedic implant is detachable from the biomaterial in the cancellous portion of the bone to facilitate subsequent removal of the orthopedic implant from the bone.

Claims19

Dependent claims

An orthopedic implant with a supplemental fixation system that releasably secures to the orthopedic implant to supplement fixation of the orthopedic implant in a cancellous portion of a bone, the orthopedic implant with the supplemental fixation system comprising:

an orthopedic implant having at least one lumen extending from a proximal portion to a distal portion that is configured to extend into the cancellous portions of the bone;
at least one fixation structure that is configured to extend through the lumen in the orthopedic implant and into the cancellous portion of the bone past the distal portion of the orthopedic implant;
a curable, flowable biomaterial that flows through the lumen into engagement with the fixation structure near the distal portion of the orthopedic implant and is configured to cure in situ in contact with the cancellous portion of the bone, the fixation structure and cured biomaterial located in the cancellous portion of the bone comprising at least one surface that is configured to engage with an undercut in the cancellous portion of the bone to oppose a pull-out force acting generally along a pull-out direction;
and
a fastener that releasably secures the fixation system in the lumen of the orthopedic implant to supplement fixation of the orthopedic implant in the cancellous portion of the bone, such that the fixation structure and cured biomaterial are detachable from the orthopedic implant to facilitate subsequent removal of the orthopedic implant from the cancellous portion of the bone without removing the fixation structure or the cured biomaterial from the bone.

2 more elements

A method of implanting an orthopedic implant with a supplemental fixation system that releasably secures to the orthopedic implant to supplement fixation of the orthopedic implant in a cancellous portion of a bone, the method comprising the steps of:

implanting the orthopedic implant in the bone so a distal portion of the orthopedic implant extends into the cancellous portions;
inserting at least one fixation structure through a lumen in the orthopedic implant and into the cancellous portion of the bone past the distal portion of the orthopedic implant;
delivering a curable, flowable biomaterial into engagement with the fixation structure near the distal portion of the orthopedic implant;
at least partially curing the flowable biomaterial in-situ in contact with the cancellous portion of the bone, the fixation structure and cured biomaterial located in the cancellous portion of the bone comprising at least one surface that engages with an undercut in the cancellous portion of the bone to oppose a pull-out force acting generally along a pull-out direction;
and
releasably securing the fixation system in the lumen of the orthopedic implant with a fastener to supplement fixation of the orthopedic implant in the cancellous portion of the bone, such that the fixation structure and cured biomaterial are detachable from the orthopedic implant to facilitate subsequent removal of the orthopedic implant from the cancellous portion of the bone without removing the fixation structure or the cured biomaterial from the bone.

3 more elements

Dependencies are inferred from the claim text.

Facts

Application: 13/743,869Filed 17 Jan 2013 · continuation in part
Priority: 20 Jun 2011
Published: US 2013/0046351 A16 Jun 2013
Granted: 7 Apr 2015
Term ends: Not estimatedThe source records don’t support an estimate.

Classification8 codes

A61B 17/844
Fasteners therefor or fasteners being internal fixation devices: with expandable anchors or anchors having movable parts
A61B 17/864
Pins or screws or threaded wires; nuts therefor: hollow, e.g. with socket or cannulated
A61F 2/0811
Muscles; Tendons; Ligaments: fixation devices for tendons or ligaments
A61B 2017/564
Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor: methods for bone or joint treatment

Family

Application61/498,687Us provisional application · filed 20 Jun 2011
Application61/515,009Us provisional application · filed 4 Aug 2011
Application61/591,304Us provisional application · filed 27 Jan 2012
PCT/US2012/043346Parent of this continuation-in-part · filed 20 Jun 2012
Application13/658,182Parent of this continuation-in-part · filed 23 Oct 2012
US 2013/0144348 A1Pre-grant publication · published 6 Jun 2013
US 2013/0046351 A1Published application
US 8,951,265 B2Related patent
US 8,998,925 B2This patent

From the US filing history. Foreign family members aren’t listed.