Nexus Spine, LLC

Other

Peter A Halverson

David T Hawkes

Daniel Manwill

Ken Gardner

Jeffrey S Hoskins

Jeffrey Ellis Harris

A coupling assembly for use in surgical constructs includes a first body and a second body. One of the first body and the second body includes a male member and an other of the first body and the second body includes a female member. The male member is sized and shaped to be received within the female member and the female member has an internal bore sized and shaped to receive the male member therein. One of the male member or the female member includes one or more engagement features formed therewith or attached thereto. The engagement features are operable to provide a gripping interface between the male member and the female member to couple the male member and the female member one to another.

Surgical construct coupling system

A porous implant design method includes defining a design volume for a porous implant, a load to be borne by the design volume, and an objective function solution characteristic related to the design volume. Next, the load is divided into a plurality of sub-loads and an optimization procedure is performed: until all sub-loads have been applied, one of the plurality of sub-loads is applied to the material in the design volume, material from the design volume is removed such that remaining material within the design volume is capable of bearing one of the plurality of sub-loads while satisfying the objection function solution characteristic; the remaining material defines a void space without material, the void space is set as a new design volume for any remaining sub-loads, the new design volume is set as being full of material. Then, the remaining material from each cycle of the optimization is combined.

Methods for developing porous implants of optimal properties

Orthopedic implants, particularly interbody spacers, have a combination of correct pore size and stiffness/flexibility. When the implants have the proper pore size and stiffness, osteocytes are able to properly bridge the pores of the implant and then experience a proper compressive load to stimulate the bone cells to form bone within the pores. An implant includes a body formed of an osteoconductive material and having a stiffness of between 400 megapascals (MPa) and 1,200 MPa. Additionally, the body includes a plurality of pores having an average size of between 150 microns and 600 microns. The pores permit the growth of bone therein. The body is formed of packs of coils which may be formed using an additive manufacturing process and using traditional orthopedic implant materials such as titanium and titanium alloys while still achieving desired stiffness and pore sizes of the implants.

Porous interbody spacer

An expanding, conforming interbody implant includes a plurality of superior and a plurality of inferior segments. The segments are adapted to individually expand, contact, and conform to endplates of vertebral bodies to distribute forces equally over the implant and across the vertebral endplates. Once a proper extension of the segments has been achieved, the segments are locked in position. The implant has a stiffness that approximates the stiffness of bone, and the implant minimizes problems with subsidence, endplate fractures, and stress shielding.

Expanding, conforming interbody spacer

Improved fixation or stabilization of implants is achieved via one or more deployable spikes or anchors. The deployable spikes or anchors may be present in the implant in a nested, collapsed, or retracted position while the implant is inserted into the human body, and may then be deployed (e.g., into adjacent bone) after the implant is in place, thereby fixing the implant's location against unwanted movement. Such fixation or stabilization of the implant may reduce patients' pain, may improve overall short-term and long-term stability of the implant, and may improve osteo-integration into the implant.

Stand-alone interbody fusion

A surgical implant includes a deployable, retractable, or removable ramped nose. During insertion of the implant, the ramped nose is deployed such that the ramped nose can serve to distract a space into which the implant is inserted. At some point during or after insertion, the ramped nose can be collapsed and removed or retracted so that it does not extend beyond the space into which the implant is inserted, while the implant extends at full height throughout the space into which the implant is inserted. The implant includes an implant body having a deployable ramped nose adapted to selectively extend from the body and transition from a first height proximate the implant body to a second, shorter, height distal from the implant body. The deployable ramped nose is adapted to distract an implant site upon insertion of the implantable medical device.

Deployable ramped nose for implantable medical devices

An expandable interbody spacer includes a first endplate surface located on a first side of the spacer and adapted to contact a vertebral endplate surface of a first vertebral body, a second endplate surface located on a second, opposed, side of the spacer and adapted to contact a vertebral endplate surface of a second, opposed, vertebral body and an expansion mechanism adapted to selectively apply a distracting force between the first endplate surface and the second endplate surface, whereby actuation of the expansion mechanism causes the spacer to transition between a compressed insertion configuration to an expanded fusion configuration. The spacer also includes one or more of a deformable surface, a porosity to promote bone on-growth or through-growth, a stiffness substantially equivalent to cortical bone, and structure distributing loads through the spacer substantially without transferring the loads through higher-stiffness structures.

Expanding interbody spacers

A coupling assembly for use in surgical constructs comprises a first body and a second body. One of the first body and the second body includes a male member and an other of the first body and the second body includes a female member. The male member is sized and shaped to be received within the female member and the female member has an internal bore sized and shaped to receive the male member therein. A raised portion is formed on or attached to the male member. An area of decreased diameter is associated with the internal bore of the female member. The first and second bodies are coupleable to one another by an interference fit when the raised portion of the male member is positioned within the area of decreased diameter associated with the internal bore of the female member.

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Draper, UT, United States of America

Peter A Halverson