Howmedica Osteonics Corporation

Pfizer Corporation

Howmedica Corp.

Pfizer Hospital Products Group, Inc.

Thomas Francis McCarthy

Amit Mistry

Robin Stamp

Joseph Robinson

Robert W Klein

Brock Miller

Vincent Alipit

Yuri Zaitsev

David Markel

Aiguo Wang

Daniel E Lawrynowicz

Zongtao Zhang

Rocco R Borzone

Keenan Michael Hanson

Christopher DeMaria

Marc Esformes

Anthony J La Rosa

Edward J Laganis

Jay Bichet

Mark Esformes

Jason R Cahayla

A three-dimensional structure is formed when layers of a material are deposited onto a substrate and scanned with a high energy beam to at least partially melt each layer of the material. Upon scanning the layers at predetermined locations at least a first segment overlapping a second segment and underlapping a third segment is formed.

Porous structures produced by additive layer manufacturing

Systems and methods are provided for planning placement of an acetabular implant for a patient based on pelvic tilt. The system includes one or more sensors to be placed on the patient to provide measurements of a pelvic tilt angle of the patient taken with the patient in various functional positions to produce patient-specific data based on pelvic tilt from which to plan an inclination angle and a version angle of the acetabular implant for the patient.

Systems and methods for planning placement of an acetabular implant for a patient based on pelvic tilt

A method is used for aligning an acetabular cup insertion instrument by taking a single lateral view pre-operative digital x-ray of a standing patient's pelvis. The natural pelvic tilt angle is determined by locating an anterior pelvic plane (APP) which is defined by first, second and third points on the anterior of the pelvis and determining the angle between the APP and a coronal plane perpendicular to the surface on which the patient is standing. The patient is then placed on a surface of an operating room table in a supine position. A position tracking device is placed on the patient's pelvis to track movement. Thereafter an operating room navigation or orientation system is used to relocate the APP defined by the first, second and third points. A cup insertion instrument having a position tracking device thereon is oriented using the navigation or orientation system.

Method for aligning an acetabular cup

A method for avoiding impingement between an implanted prosthetic hip stem and acetabular cup uses at least one digital x-ray of a standing patient preferably including a lateral x-ray to determine a pelvic tilt angle of the patient. A hip stem is virtually implanted at an initial stem version angle into a virtual femur constructed from the digital x-ray. Data of at least one hip joint motion is obtained from at least one individual. A range of inclination and anteversion angles is calculated for a virtually implanted acetabular cup that avoids impingement with the virtually implanted hip stem. The calculated range of inclination or anteversion angles is based at least in part on the pelvic tilt angle of the patient, the initial hip stem version angle and the obtained joint motion data.

Patient specific implantation method for range of motion hip impingement

A method for coating an orthopedic implant made of a titanium or titanium alloy substrate with a cobalt-chrome molybdenum alloy uses multi-arc physical vapor deposition (MA-PVD). The substrate has a first bearing surface coated with a coating made of the deposited cobalt-chromium molybdenum alloy. The bearing surface slidably receives a second bearing surface of the prosthetic joint component. The MA-PVD cobalt-chromium molybdenum alloy coating forming the first bearing surface is made up of hexagonal close packed (HCP) grains having a columnar structure with a length of about 1 &#x3bc;m and a width of about 0.1 &#x3bc;m with the length of each HCP grains being oriented generally perpendicular to the titanium substrate bearing surface.

Cobalt chrome coated titanium implant

An acetabular trialing system has a trial cup including a body comprising an outer surface, a part-spherical inner surface and a rim extending between the inner and outer surface with a plurality of spaced inwardly resiliently deflectable rim members each connected at a first end to the body outer surface. The part-spherical inner surface has a plurality of spaced resilient deflectable bearing members each forming part of the body part-spherical inner surface. The bearing members have a first end deflectable towards the body outer surface. Upon inward deflection, one of the plurality of deflectable rim members is capable of contacting the first end of a corresponding one of the plurality of deflectable bearing members and moving the bearing member towards the body outer surface and into contact an electrical signaling device mounted on the body intermediate the outer surface thereof and the deflectable bearing member.

Acetabular cup positioning device

An alignment system for aligning an acetabular cup insertion instrument utilizes pre-operative preferably standing x-rays and intra-operative x-rays to allow the surgeon to compensate for the position of a patient on an operating room table. The system uses a programmable computer connected to a digital x-ray system and an navigation tracking system to provide input for calculating the inclination and anteversion angles of an acetabular cup impactor based on a pre-operative plan developed from the standing x-rays. The system calculates changes in lengths and angles between anatomic landmarks on the pelvis to alter the intra-operative orientation of the acetabular reaming and impacting instruments to produce the desired inclination and anteversion angles when the pelvis is reoriented as the patient is placed on an operating table.

Apparatus and method are described for interoperatively determining, during a trailing procedure conducted in connection with total hip arthroplasty, a combination of neck length and femoral head offset required in a femoral component for establishing appropriate hip mechanics in a prosthetic hip joint to be implanted at an implant site. A trial femoral head is coupled for selective movement relative to a femoral stem component to move the trial femoral head longitudinally and laterally relative to a predetermined direction among selected combinations of trial distance and trial offset to evaluate hip mechanics and determine interoperatively an appropriate combination of trial distance and trial offset corresponding to the combination of neck length and femoral head offset required in the prosthetic hip joint.

Hip arthroplasty trialing apparatus with adjustable proximal trial and method

A femoral hip prosthesis comprises a main member, a modular member and a means for connecting the two. The main member has a stem portion and a body portion which are adapted for insertion into the intramedullary canal. The body portion has lateral, posterior, and anterior sides adapted to mate with the bone and has a medial side configured and dimensioned to receive a modular member. The modular member is chosen from a plurality of such members of various shapes and sizes and is adapted to fit accurately into the intramedullary canal, especially after the intramedullary canal has been deformed through the prior implantation of a prosthetic hip device.

Modular hip prosthesis

An improved device for repairing fractured bones is provided, the device comprising a specially designed connector, which is especially useful in combination with a plate having a tab cut out, a stop, a flat portion and a bore portion and with a compression screw and a lag screw.

Connector having a stop member

A coupling device and method of coupling especially suitable for coupling multiple components of surgical instruments are provided. A wedging portion provides an interference fit between parts so that a secure connection can be made that will not unintentionally dissociate. In a preferred embodiment, bores and counterbores within dovetail portions are provided. Especially preferred is the use of this coupling device to secure a reamer head to a shaft.

Growing community of inventors

Neshanic Station, NJ, United States of America

Thomas Francis McCarthy