NEXGEN KNEE PROSTHESIS & LEGACY KNEE PROSTHESIS W/CO-NIDIUM SURFACE HARDENING PROCESS

K962196 · Zimmer, Inc. · JWH · Aug 23, 1996 · Orthopedic

Device Facts

Record IDK962196
Device NameNEXGEN KNEE PROSTHESIS & LEGACY KNEE PROSTHESIS W/CO-NIDIUM SURFACE HARDENING PROCESS
ApplicantZimmer, Inc.
Product CodeJWH · Orthopedic
Decision DateAug 23, 1996
DecisionSESE
Submission TypeTraditional
Regulation21 CFR 888.3560
Device ClassClass 2
AttributesTherapeutic

Indications for Use

Knee femoral components are single use devices implanted in the human knee during total knee arthroplasty. This knee is intended for cement use only.

Device Story

NexGen and Legacy knee femoral components; cast Zimaloy (Co-Cr-Mo alloy) construction; Co-Nidium surface hardening process for improved wear resistance. Available in left/right configurations; designs include Cruciate Retaining (CR), Posterior Stabilizing (PS, L-PS), Cruciate Retaining Augmentable (CRA), and Constrained Condylar Knee (L-CCK). Options include stem extensions (straight/offset, various lengths/diameters) and surface finishes (precoat, porous, NoCoat). Implanted by orthopedic surgeons during total knee arthroplasty; intended for cemented fixation to restore joint function and reduce wear.

Clinical Evidence

Bench testing only; performance data demonstrated improved wear resistance of Co-Nidium surface-hardened femoral components compared to non-treated femoral components.

Technological Characteristics

Material: Cast Zimaloy (Cobalt-Chromium-Molybdenum alloy). Surface treatment: Co-Nidium surface hardening process. Design: Femoral components with various configurations (CR, PS, L-PS, CRA, L-CCK) and stem extension options. Fixation: Cemented only.

Indications for Use

Indicated for patients undergoing total knee arthroplasty requiring femoral components; intended for cemented use only.

Regulatory Classification

Identification

A knee joint patellofemorotibial polymer/metal/polymer semi-constrained cemented prosthesis is a device intended to be implanted to replace a knee joint. The device limits translation and rotation in one or more planes via the geometry of its articulating surfaces. It has no linkage across-the-joint. This generic type of device includes prostheses that have a femoral component made of alloys, such as cobalt-chromium-molybdenum, and a tibial component or components and a retropatellar resurfacing component made of ultra-high molecular weight polyethylene. This generic type of device is limited to those prostheses intended for use with bone cement (§ 888.3027).

Predicate Devices

Submission Summary (Full Text)

{0} Zimmer AUG 23 1996 P.O. Box 708 Warsaw, IN 46581-0708 219 267-6131 K962196 # Summary of Safety and Effectiveness The summary of safety and effectiveness information is submitted in accordance with the requirements of SMDA 1990. - Submitted by: Zimmer, Inc. P.O. Box 708 Warsaw, IN 46581-0708 - Prepared by: Ruth Ann Wood Senior Regulatory Affairs Associate - Date: June 5, 1996 - Trade Name: NexGen® Complete Knee Solution with Co-Nidium™ Surface Hardening Process and Legacy™ Knee System with Co-Nidium™ Surface Hardening Process - Classification: Class II 21 CFR 888.3530 - Predicate Devices: Cobalt-Chromium Molybdenum Alloy Femoral Heads with Co-Nidium Surface Hardening Process; MG II® Total Knee System with Ti-Nidium® Surface Hardening Process; MG II® Porous Total Knee System, NexGen® Complete Knee Solution; and the Legacy™ Knee System - Device Description: The femorals are made of cast Zimaloy® Cobalt-Chromium-Molybdenum Alloy. They are hardened by the Co-Nidium™ Surface Hardening Process described in 73 A Bristol-Myers Squibb Company {1} They are hardened by the Co-Nidium™ Surface Hardening Process described in Section XI. They are available in left and right configurations. NexGen/Legacy Knee femorals cover a multitude of patient specific needs with the Cruciate Retaining (CR), Posterior Stabilizing (PS and L-PS), Cruciate Retaining Augmentable (CRA), and Constrained Condylar Knee (L-CCK) designs. Certain femorals can be augmented with stem extensions. The extensions come in a broad variety of straight and offset shapes as well as numerous lengths and diameters. These femorals will be available in precoat, porous, and option (NoCoat) versions. - Intended Use: Knee femoral components are single use devices implanted in the human knee during total knee arthroplasty. This knee is intended for cement use only. - Performance Data: The performance data submitted in the 510(k) demonstrated the improved wear resistance compared to nontreated femoral components. RA05603K.510 74
Innolitics

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