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Natural-Knee® II Modular CoCr Cemented Tibial Baseplate

Natural-Knee® II Modular CoCr Cemented Tibial Baseplate

Product catalog summary

Overview
The Natural-Knee® Modular Cemented Baseplate is a component designed for cemented knee procedures, made from cast cobalt chrome. It is compatible with various femoral components and tibial insert configurations, addressing specific challenges in cemented baseplate procedures.

Design Features

The baseplate includes a built-in 5-degree posterior slope to replicate normal anatomy.
It features a keel and boss surface finish that supports bone ongrowth and cement adhesion.
An asymmetric design matches the proximal tibia, avoiding soft tissue impingement and implant subsidence.
The keel is anatomically positioned and shaped to prevent stress risers and enhance anti-rotation.
The tibial tray's inside surface is smooth to reduce backside wear, while the outer surface prevents cement adhesion, reducing cleanup time.
Components are made of cobalt chrome to avoid issues with dissimilar metals.
The stem/plug screw is designed to prevent disassembly from the baseplate.

Additional Features

A 75mm stem extension can be used for added stability.
Cement pockets have a roughened surface for optimal adhesion.
The design eliminates through-holes to prevent cement debris pathways.
Instruments are designed for predictable, reproducible results, consistent with existing systems.

Implant Specifications
The document provides detailed measurements for various sizes of the baseplate, including M/L, A/P Medial, A/P Lateral, and Anterior Offset dimensions.

Catalog excerpts

Natural-Knee® II Modular CoCr Cemented Tibial Baseplate-1

Natural-Knee® Modular Cemented Baseplate Designed to meet the challenges of a cemented procedure

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Natural-Knee® Modular Cemented Baseplate The Natural-Knee Modular Cemented Baseplate is made from cast cobalt chrome and is designed to optimally address the issues and challenges of a cemented baseplate procedure. The baseplate complements the existing family of baseplates and can be used with the primary, revision and CRK (constrained) femoral components as well as all Natural-Knee tibial insert congurations. A/P and M/L postoperative radiographs Design Rationale • Keel and boss surface nish affords bone ongrowth and cement adhesion • Asymmetric design matches the proximal tibia and avoids...

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• Outer periphery surface nish of the tibial tray prevents cement adhesion, thus reducing cleanup time • Inside surface of the tibial tray has a smooth nish to reduce the potential for backside wear • Reduced boss diameter and thin keel ns are bone-conserving The radius of the keel ns prevents stress risers in the cement and also expands out to the areas of dense bone for optimal anti-rotation • Baseplate, distal plug and stem/ plug screw are made of cobalt chrome to reduce the potential problems associated with combining dissimilar metals • Stem/plug screw is “self-captured” to prevent disassembly...

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Contact your Zimmer representative or visit us at www.zimmer.com

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