Omnilife Science, Inc.

Johnson & Johnson Professional, Inc.

Formae, Inc.

Apex Surgical, LLC

Perception Raisonnement Action En Medecine

Edward J Cheal

George B Cipolletti

Michael J O'Neil

Arnold E Oyola

Carl Knobloch

Christopher Plaskos

Kevin A Mansmann

James H Henry

David L Lasalle

Bryan Horan

A prosthetic implant replaces hyaline cartilage in a synovial joint with a flexible polymer sliding surface, preferably of hydrogel, on a segmented support with an array of adjacent segments to which the hydrogel is molded. Adjacent segments are laterally and angularly displaceable permitting the implant to conform to rounded or irregular surfaces or to be rolled or folded for arthroscopic placement. Tension cables threaded through segments along a circuit can cinch segments together for stiffening the supporting layer and/or the cable can pull the implant against a bone surface. Adjacent segments can have inter-engaged structures. In some embodiments the segments are carried on a flexible foil or fibrous sheet.

Rigid segmented flexible anchors

An prosthetic implant replaces hyaline cartilage in a synovial joint with a flexible polymer sliding surface, preferably of hydrogel, on a segmented support with an array of adjacent segments to which the hydrogel is molded. Adjacent segments are laterally and angularly displaceable permitting the implant to conform to rounded or irregular surfaces or to be rolled or folded for arthroscopic placement. Tension cables threaded through segments along a circuit can cinch segments together for stiffening the supporting layer and/or the cable can pull the implant against a bone surface. Adjacent segments can have inter-engaged structures. In some embodiments the segments are carried on a flexible foil or fibrous sheet.

A computer assisted surgical system for guiding bone cutting operations of an arthroplasty surgery is provided. The computer assisted surgical system includes a cutting guide having a guiding surface for mounting to a bone and a computer. The computer is in communication with the cutting guide and configured to generate a bone model of the first bone without the use of pre-operative bone images, determine a position of an implant model having a bone interface surface on the bone model, determine a position of the cutting guide on the first bone based on the determined position of the implant model on the bone model, and position the guiding surface of the cutting guide to one of a plurality of predetermined cut configurations relative to the bone interface surface.

System and method for bone preparation for an implant

Modular prosthesis components having first and second relief patterns, the first relief pattern being complementary to the second relief pattern such that a component having the first relief pattern may seat fully on and in register with a component having the second relief pattern.

Modular prosthesis

A joint prosthesis may include a tibial tray, a tibial base, a tibial articular member, and a femoral articular member. A coupler may engage the tray, and optionally the base, with an interference fit. An interference fit may be engaged using a mating surface with a constant non-tapering cross-sectional geometry.

Modular knee prosthesis

A method of manufacturing an article may include crosslinking a UHMWPE preform, shaping the crosslinked preform, heat-treating the shape in a temperature-controlled oven and low-oxygen environment, and inspecting the heat-treated shape for conformance to article specifications.

Crosslinked polyethylene article

A joint prosthesis may include a tibial tray, a tibial base, a tibial articular member, and a femoral articular member. In some embodiments, a coupler engages the tray, and optionally the base, with an interference fit. In some embodiments, the base engages the tray with an interference fit.

A joint prosthesis may include a modular head member, a modular body member, and a stem member. The stem member may be so tapered as to be engageable by taper press-fit into the medullary cavity of a bone. The body member may be engageable in the stem member by friction-tight press-fit at a zone of diametrical interference.

Tapered joint prosthesis

Modular joint prostheses and components thereof are disclosed. In an embodiment, a joint prosthesis may include a head member, a neck member, and a stem member.

Joint prostheses and components thereof

The present invention discloses systems, kits and methods for prosthetic joint replacement. In one embodiment, a modular implantable surgical device including a stem, a neck and a head is disclosed that is suitable for replacement of a hip joint. In another embodiment, a kit is provided that includes at least two stems, necks and heads that can be used by the surgeon to adapt the size and shape of the assembled prosthetic device to conform to an individual patient's anatomy. In a practice according to the methods of the present invention, steps are disclosed for positioning the prosthesis in an individual patient in an anatomically correct position.

Implantable joint prosthesis

A joint prosthesis system includes first and second components that are joinable to each other in a manner to inhibit the rotation of the second component relative to the first component. The prosthesis system includes a rotation-inhibiting mechanism that has at least circumferential groove formed in one of a portion of the first component and a portion of the second component and at least one rib formed on the other of the first component and the second component. In one embodiment the rib may be eccentric, and the groove and the rib are matable with each other upon mounting of the second component within the first component.

Joint prosthesis having controlled rotation

A joint prosthesis system includes first and second components that are joinable to one another in a manner to permit axial rotation of one component relative to the other component while achieving axial securement of the two components. In one embodiment the joint prosthesis system is a knee joint prosthesis and the two components are a tibial tray and a tibial bearing insert. The tibial bearing insert includes a mating stem that has one or more positive surface features on its exterior surface. The positive surface features mate with axial slot(s) formed in a mating cavity of the tibial tray to enable insertion of the mating stem within the mating cavity. Upon insertion the positive surface features are engaged by a circumferential groove disposed distally of the axial slot(s). Misalignment of the positive surface features and the axial slot(s) enables proper orientation of the tibial tray and tibial bearing insert, and provides axial securement of the two components.

Rotatable tibial prosthesis with keyed axial securement

A joint prosthesis system includes first and second components that are joinable to each other in a manner to inhibit the second component from withdrawing from the first component. The prosthesis system includes a securing mechanism that has at least one first surface feature (e.g. a negative surface feature), located on the first component, and at least one second surface feature (e.g. a positive surface feature) located on the second component. The first and second surface features are engageable so that, upon engagement, the second component is axially secured to the first component and the second component is able to rotate with respect to the first component. Preferably, the first surface feature and the second surface feature are adapted and dimensioned to engage and form a snap fit arrangement. In one embodiment, the joint prosthesis system is a knee joint prosthesis and the two components are a tibial tray and a tibial bearing insert.

Growing community of inventors

Duxbury, MA, United States of America

Edward J Cheal