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Publication Number
US-11510787-B2
Publication Date
2022-11-29
Expiration Date
Abstract
In various embodiments, an implant for interfacing with a bone structure includes a web structure including a space truss. The space truss includes two or more planar truss units having a plurality of struts joined at nodes and the web structure is configured to interface with human bone tissue. In some embodiments, a method is provided that includes accessing an intersomatic space and inserting an implant into the intersomatic space. The implant includes a web structure including a space truss. The space truss includes two or more planar truss units having a plurality of struts joined at nodes and the web structure is configured to interface with human bone tissue.
Core Innovation
The invention relates to an implant for orthopedic use that includes an intramedullary body having one or more outer contact faces and a space truss formed in an outer portion of the intramedullary body. The space truss is positioned so that it forms a portion of an outer surface of at least one contact face, while the space truss is at least partially disposed inside the medullary cavity during use between the intramedullary body and the medullary cavity.
The disclosed space truss architecture includes two or more planar truss units with a plurality of struts joined at nodes, and at least some of the struts extend inwards from an outer surface of the space truss to a central interior portion. The planar truss units can include planar triangular truss units formed by three substantially straight struts connected at three nodes in a triangular arrangement, and adjacent planar truss units can be oriented so that a plane of one unit is not substantially parallel to a plane of an adjacent unit sharing at least one strut.
The struts define openings configured to allow bone through growth, and the implant can be configured to provide high open volume for bone ingrowth via the space truss and its openings. The disclosed geometry also includes polyhedral building blocks such as tetrahedra and other polyhedrons with vertex-to-vertex strut coupling between corresponding vertices of tetrahedrons, and material and coating options include biocompatible materials such as titanium alloy and PEEK and coatings coupled to the struts, including biologic, growth factors, and antimicrobial agents.
Claims Coverage
Two independent claims are identified: an implant claim and a method claim. The claims cover an intramedullary body with an outer-positioned space truss formed from two or more planar truss units with struts joined at nodes and inward-extending struts toward a central interior portion, where the space truss forms part of an outer contact face and is at least partially disposed inside the medullary cavity.
Intramedullary body with contact faces and outer-positioned space truss
An implant comprising an intramedullary body, insertable into a medullary cavity of a bone, comprising one or more outer contact faces; and a space truss formed in an outer portion of the intramedullary body, wherein the space truss is positioned in the outer portion such that the space truss forms a portion of an outer surface of the contact face of the intramedullary body.
Space truss planar truss units with node-joined struts and inward extension
The space truss comprises two or more planar truss units having a plurality of struts joined at nodes, and wherein at least some of the struts extend inwards from an outer surface of the space truss to a central, interior portion of the space truss, wherein, during use, the space truss is at least partially disposed inside the medullary cavity, between the intramedullary body of the implant and the medullary cavity.
Method using medullary cavity opening and implant insertion with inward-extending planar space truss
A method comprising forming one or more openings into a medullary cavity of a bone; and inserting at least a portion of an implant into the medullary cavity of the bone, wherein the implant comprises an intramedullary body insertable into the medullary cavity and a space truss formed in an outer portion of the intramedullary body, with the space truss positioned to form a portion of an outer surface of the contact face and, during use, disposed at least partially inside the medullary cavity between the intramedullary body and the medullary cavity, wherein the space truss comprises two or more planar truss units having a plurality of struts joined at nodes and at least some struts extend inwards from an outer surface to a central, interior portion of the space truss.
The independent claims cover an orthopedic intramedullary implant with an outer-positioned space truss made from multiple node-joined planar truss units and inward-extending struts, and a method claim further requires forming openings in the medullary cavity and inserting the implant so the same space-truss configuration is disposed between the intramedullary body and the medullary cavity.
Stated Advantages
The implant can provide high open volume for bone ingrowth via the space truss and its openings.
The struts define openings configured to allow bone through growth.
Documented Applications
Orthopedic use.
Insertion into a medullary cavity of a bone.
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