Joint Development, LLC

Dermott J McHugh

Eric M Dacus

Chris A Weaber

Andrea Cragen

James Thomas Grutta

The tibial insert includes a base having a coupling for attachment to a tibial baseplate, and an upwardly presented articular surface formed from the base, which includes a concave troughed geometry having a progressively larger medial-to-lateral frontal cross-section opening anteriorly to posteriorly along a length of the tibial insert.

Tibial insert with variable articular surface

Femoral component

Knee baseplate

Knee insert

The broach or rasp holder tool with reduced rasp moment includes an angled strike plate with an optional curved or spheroidal surface and/or an angled withdrawal plate having a contact surface for receiving a generally perpendicular strike force that generally aligns with a point along a rasp for substantially eliminating a moment applied thereto while broaching the intramedullary canal in preparation for implanting a prosthetic stem during joint replacement surgery.

Broach holder tool with reduced rasp moment

Posterior stabilized femur

Posterior stabilized insert

The orthopedic implant locking system may include an eccentric tibial stem having an engagement rod selectively threadingly engageable with a tibial baseplate, a lock housing securable in rotatable and substantial vertical constrained relation relative to the tibial stem, and an extension lock selectively threadingly engageable with the lock housing and including an inner passage keyed to selectively slidably engage the engagement rod in flush engagement therewith. The extension lock may extend or contract in response to rotational movement of the lock housing simultaneously while the extension lock remains in substantial non-rotatable relation relative to the tibial stem. Engagement of the extension lock with the tibial baseplate may generally vertically and rotationally selectively lock the tibial baseplate with the tibial stem and, based on the threaded spaced relation of the tibial baseplate relative to the tibial stem, linearly and eccentrically axially misalign the tibial stem relative to the tibial baseplate.

Locking system

The femoral stem prosthesis includes a prosthesis body having a neck, stem, and porous coating receiving area. A portion of a transition between the porous coating receiving area and the stem is defined by a recess where the porous coating receiving area inwardly extends by a depth relative to the stem while the porous coating receiving area is approximately flush with the stem about a remainder of the transition between the porous coating receiving area and the stem. A porous coating overlying the porous coating receiving area has a thickness approximately equal to the depth of the recess to define a smooth transition between the porous coating and the stem along the portion of the transition by the at least one recess and a collar outwardly extending relative to the stem by approximately the thickness along the remainder of the transition between the porous coating receiving area and the stem.

Femoral stem with partially recessed porous coating

Femur stem with medially recessed porous coating

Growing community of inventors

Seattle, WA, United States of America

Dermott J McHugh