Zimmer Gmbh

Other

Bristol-myers Squibb Compnay

Zimmer Technology, Inc.

Zimmer, Inc, by Said Stalcup, Dietz, Bays and Vanlaningham

Bertin; Kim C.

Burke; Dennis W.

Romagnoli, Sergio

Kim C Bertin

Gregory C Stalcup

Dennis W Burke

Rodney L Bays

Terry L Dietz

Daniel P O'Connor

Richard D Vanlaningham

Abraham P Habegger

Brian D Earl

Lawrence Dorr

Robert E Booth, Jr

Aaron Rosenberg

Sergio Romagnoli

Peter Stanley Walker

Dwight T Todd

Adam M Griner

Aaron A Hofmann

Steven E Dietzel

Brian D Byrd

Harry E Rubash

Ron Donkers

James C Harris

G Kris Kumar

Linggawati Tanamal

Richard A Berger

Steven C Kitch

David A Mann

Harold K Dunn

Lisa K Schroder

Lawrence D Dorr

Paul Francis Hickey

Aaron A Hoffman

Timothy K Doolin

Philip H Cripe

Robert Booth, Jr

Robert E Booth

Peter S Walker

Aaron A Hofman

A set of distal femoral knee prostheses which are designed to be more narrow in medial/lateral dimensions with increasing anterior/posterior size than existing prostheses to more closely correspond to the physical anatomy of female patients. The prostheses are designed to have a substantially trapezoidal shape or profile when viewed distally which features a more pronounced narrowing of the medial/lateral dimensions beginning at the posterior end of the prostheses and progressing anteriorly to the anterior end of the prostheses. Additionally, the prostheses each include a reduced profile patellar sulcus and reduced profile anterior condyles to more closely conform to the anatomy of a resected femur, and also include sulcus tracking optimized to conform to female anatomy.

Distal femoral knee prostheses

A mobile bearing knee prosthesis apparatus includes a tibial plate. The tibial plate includes a medial lobe and a lateral lobe conjoined in a dividing plane. The apparatus further includes a tibio-femoral insert and a stud-like protuberance extending from the tibial plate into the tibio-femoral insert. The stud-like protuberance includes a protuberance sidewall positioned in the tibio-femoral insert. The protuberance sidewall is bisected by the dividing plane and includes a pair of opposing eccentric convex arcuate portions, and the tibio-femoral insert is moveable relative to the tibial plate about an axis medially disposed from the dividing plane. A mobile bearing knee prosthesis apparatus includes a tibial plate and a tibio-femoral insert coupled to the tibial plate. The tibio-femoral insert includes a generally posteriorly positioned chamfered superior surface and defines a generally posteriorly positioned generally U-shaped space bounded at least in part by the chamfered surface.

Tibial knee component with a mobile bearing

A method of preparing the proximal tibial and distal ends of the femur for the implantation of prosthetic components, including the steps of exposing the joint; resecting the distal end of the femur; resecting the tibia; and making a preliminary rough cut of a posterior portion of the pair of condyles. The rough cut is made by positioning a guide on the distal end of the femur and severing a small piece of the posterior portion of the pair of condyles. The rough cut is made prior to the step of resecting the tibia. The method may include finishing the femur by severing and removing a final piece of the posterior portion of the pair of condyles. The small piece removed in the preliminary rough cut step is sized to preserve enough of posterior portion to permit the removal of the final piece.

Posterior femur rough cut guide for minimally invasive knee arthroplasty

A method and apparatus for knee replacement surgery wherein a femoral provisional component is provided which corresponds to a permanent component to be implanted in a human and which includes means for establishing the correct fit and position of such a component, prior to its implantation, in relation to the soft tissues of the knee before final resection of the anterior femoral surface. The provisional component further includes cutting guide means for such anterior surface resection such that accurate cuts may be made with the provisional component in place. The method involves preparing the distal femoral surface using the femoral intramedullary canal as a constant reference point for posterior and distal cutting guides followed by locating the provisional component by means of a provisional intramedullary stem so that the relationship with the soft tissues of the knee may be accurately established.

Method for resecting the knee using a resection guide and provisional prosthetic component

A provisional knee implant assembly includes a femoral provisional having an articulating surface and a plurality of locating openings. A patella height gauge has at least two projections which each engage with a corresponding locating opening in the femoral provisional. The patella height gauge includes at least one visual locating reference for a patella. The femoral provisional is located relative to the patella by placing the femoral provisional on a distal end of the femur; attaching the patella height gauge to the femoral provisional; overlying the patella onto the gauge; and repositioning the femoral provisional relative to the one or more visual locating references on the patella height gauge.

Patella height gauge and method of locating a patella using same

The invention is directed to an orthopaedic apparatus 24, 80, 380, 480, 580 for positioning an implant 22, 322, 422 relative to an end of a bone. The implant has at least one extractor opening 30, 330, 430 and a shoulder 26, 326, 426 with a slot therein. The positioning apparatus includes a shaft 32, 82, 382, 482 having a fixed impactor tip at an end thereof. The impactor tip is configured to be received within the implant slot. At least one clamping jaw is connected to the shaft, and includes a projection which is configured to be received in the at least one extractor opening. The at least one clamping jaw is preferably detachably connected to the shaft.

Orthopaedic positioning apparatus

A tibial milling guide which incorporates a combination of instruments for producing a planar surface on a portion of the tibia using a milling device. The system includes: an extramedullary alignment guide with a detachable reference guide, an adjustable milling base assembly, a detachable milling template, a sizing gauge, and a milling depth gauge. The reference guide is used to position the alignment guide to the tibia. The reference guide has a T-shaped member which provides a planar reference and a centering reference to the tibial head. The reference guide also allows the surgeon to set the rotational alignment before the alignment guide is secured in place. The adjustable milling base assembly is also detachably connected to the alignment guide. The milling base assembly includes a slide and a shiftable base that allows for lateral adjustments of the template with respect to the articular surface after the alignment guide has been properly secured to the tibia. The milling base is also extensibly connected to the alignment guide to allow the spacing between the articular surface and the template to be adjusted.

Tibial milling guide system

The milling instrumentation of this invention provides a milling guide connected to the femur for accommodating a milling device. The milling instrumentation includes an alignment guide which is used by the surgeon to set a femoral bracket or base on the medial and lateral sides of the exposed femur adjacent its distal end. Once the brackets are set, the alignment guide is removed and a milling guide is connected to the bases. The milling guide establishes a series of reference planes each including a slot. A powered milling device having a burr connected thereto is guided by the slots along the reference planes to accurately mill away a portion of the bone. The milling device includes a bobbin-shaped tip which positively engages the slots to ensure that the milling device is held substantially perpendicular to the reference planes of the milling guide. If necessary, other instrumentation may be connected to the femoral bases which would form a common connection point for the additional instruments thereby ensuring alignment between the various instruments. Optionally, a one piece cutting guide may be connected to the bases to allow resection of the bone by a standard oscillating saw blade. The cutting guide includes a plurality of slots such that all the cuts required for the femur can be made with one cutting guide without reorienting the guide.

Guide for femoral milling instrumention for use in total knee

Femoral milling instrumentation for use in total knee arthroplasty with

Femoral milling instrumentation for use in total knee arthoroplasty with

A device for use in an orthopedic surgical procedure for replacement of a patient's hip that, prior to dislocation of the pathologic hip, is used by the surgeon to determine leg length and leg displacement, with these measurements then used as references for reproducing or adjusting leg length and positioning. The device includes an ilium pin that is to be driven into the patient's ilium to serve as a fixed reference. Preferably, the ilium pin includes a pair of pointed end portions, the one forking off from the other, with the ilium pin top end arranged to be driven into the ilium using a driver. A straight measuring bar that includes an ilium mounting end is arranged for fitting onto the ilium pin to extend at a right angle therefrom and a scale is formed around the opening through the ilium mounting end and a radial indicator is scribed into the top of the ilium pin, for use in determining femur medial or lateral displacement. The measuring bar includes a scale scribed therealong and is arranged to receive a femoral slide fitted to slid over the scale, whereby a femoral slide side is to serve as an indicator for comparison to the scale markings for determining femoral slide positioning from the ilium pin. The femoral slide further includes a hole formed therethrough that a straight femoral pin is fitted through, forming a right angle to the measuring bar, the femoral pin having, has a pointed end to contact a fixed location on the proximal femur. A scale is scribed along a femoral pin upper portion that is arranged to receive an indicator sleeve fitted to travel along the femoral pin to engage a top surface of the femoral slide for comparison with the scale markings to determine a distance the femoral pin end is extended from the femoral slide. The device includes set screw type locks for releasably locking the device components together allowing them to be maintained in position and then reinstalled to the ilium after installation of the hip prosthesis for use in duplicating or adjusting the leg positioning relative to the acetabulum, as the surgeon determines.

Device for measuring leg length and off-set for a total hip replacement

Orthopaedic bone cutting guide

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Bountiful, UT, United States of America

Kim C Bertin