Orthopaedic implant systems including fixation features and methods of repair
Inventors
Khosla, Rudraksh • Wise, Mark • Paterson, John David • Guederian, Gregory
Assignees
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Publication Number
US-12472067-B2
Publication Date
2025-11-18
Expiration Date
Abstract
This disclosure relates to orthopaedic implant systems and methods for restoring functionality to a bone and/or joint. The implant systems disclosed herein may include a taper locking mechanism to limit or otherwise oppose separation between components and may include one or more flanges adapted to abut an exterior of the bone.
Core Innovation
The invention relates to an orthopaedic implant system with a stem portion insertable into bone and a mounting portion extending from the stem portion. The mounting portion includes a first mounting bore extending inwardly from a first engagement face and a raised protrusion extending outwardly from the first engagement face, the raised protrusion tapering along a declined face toward the first engagement face.
The system further includes a head portion adapted to mount an articulation member. The head portion includes a head bore extending inwardly from a second engagement face and a recess extending inwardly from the second engagement face, where the periphery of the recess includes an inclined face sloping towards an opening of the recess along the second engagement face. The raised protrusion is insertable through the opening and into the recess such that the declined face and the inclined face abut each other in an installed position.
When a common fastener is secured in the head bore and the first mounting bore, the first mounting bore extends along a first mounting bore axis in a direction away from the raised protrusion so that the second engagement face slides across the first engagement face. In response, the inclined face moves towards the first mounting bore axis to compress the inclined face against the declined face, based on the abutting face-to-face engagement created by inserting the raised protrusion through the opening into the recess.
In an orthopaedic implant assembly form, a collar portion interconnects the head portion and the stem portion, and a flange portion is releasably securable to the collar portion. The flange portion includes a flange body and at least one engagement flange dimensioned to abut bone, and the collar portion includes a channel dimensioned to at least partially receive the flange body. The flange portion is moveable towards the collar portion to trap a portion of bone between the at least one engagement flange and the stem portion in response to fixing a length of a flexible construct that couples the collar portion and the flange portion in an installed position.
Claims Coverage
The document provides three independent claims. Across these independent claims, the inventive coverage focuses on taper-locking face abutment and compression using a common fastener, and on collar/flange securement using a flexible construct to trap bone and add stability.
Taper-locking face abutment and common-fastener compression
The raised protrusion is insertable through the opening and into the recess such that the declined face and the inclined face abut each other in an installed position, and the first mounting bore extends along a first mounting bore axis in a direction away from the raised protrusion such that the second engagement face slides across the first engagement face and the inclined face moves towards the first mounting bore axis to compress the inclined face against the declined face in response to securing a common fastener in the head bore and the first mounting bore.
System geometry for driven sliding via reference planes and angles
The first engagement face extends along a first reference plane, the first mounting bore axis intersects the first reference plane to establish an acute first bore angle, the declined face extends along a second reference plane, the second reference plane intersects the first reference plane to establish an acute ramp angle, and the ramp angle is less than the first bore angle, so that the inclined face moves towards the first mounting bore axis to compress the inclined face against the declined face in response to securing a common fastener in the head bore and the first mounting bore.
Collar and releasably securable flange with flexible-construct bone trapping
The collar portion includes a channel dimensioned to at least partially receive the flange body, the flange portion is moveable in a direction towards the collar portion to trap a portion of bone between the at least one engagement flange and the stem portion in response to fixing a length of a flexible construct that couples the collar portion and the flange portion in an installed position.
Overall, the independent claims cover an orthopaedic implant system in which a raised tapered protrusion on a mounting portion inserts into a recess to create abutting inclined and declined faces and then a common fastener causes compression as engagement faces slide, together with an implant assembly that includes a collar and a releasably securable flange portion coupled by a flexible construct to trap bone.
Stated Advantages
Documented Applications
No documented applications found
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