Cleared Special

K232426 - Identity Imprint Porous Cruciate Retaining (CR) Knee Replacement System (KRS) with Cruciate Sacrificing (CS) Inserts (FDA 510(k) Clearance)

Class II Orthopedic device cleared through the Special 510(k) pathway - typically does not require clinical trials.

K232426 · Conformis, Inc. · Orthopedic device
Download Printable Device Report (PDF)
Optimized for regulatory review, auditing and printing
Sep 2023
Decision
28d
Days
Class 2
Risk

K232426 is an FDA 510(k) clearance for the Identity Imprint Porous Cruciate Retaining (CR) Knee Replacement System (KRS).... Classified as Prosthesis, Knee, Patello/femorotibial, Semi-constrained, Uncemented, Porous, Coated, Polymer/metal/polymer (product code MBH), Class II - Special Controls.

Submitted by Conformis, Inc. (Billerica, US). The FDA issued a Cleared decision on September 8, 2023 after a review of 28 days - a notably fast clearance cycle.

This device falls under the Orthopedic FDA review panel, regulated under 21 CFR 888.3565 - the FDA orthopedic device regulatory framework. As a Special 510(k), this submission covers a manufacturer modification to an existing cleared device rather than a new device introduction.

Device pattern: Iterative device modification. Low regulatory complexity profile. This Special 510(k) clearance confirms that the manufacturer's modifications remained within the established regulatory envelope of the original cleared device.

View all Conformis, Inc. devices

Submission Details

510(k) Number K232426 FDA.gov
FDA Decision Cleared Substantially Equivalent - Traditional 510(k) (SESE)
Date Received August 11, 2023
Decision Date September 08, 2023
Days to Decision 28 days
Submission Type Special
Review Panel Orthopedic (OR)
Summary Summary PDF
Third-party Review No - reviewed directly by FDA
Combination Product No
PCCP Authorized No
Regulatory Context
Review time vs. panel average
94d faster than avg
Panel avg: 122d · This submission: 28d
Pathway characteristics
Modification to existing cleared device.

Device Classification

Product Code MBH Prosthesis, Knee, Patello/femorotibial, Semi-constrained, Uncemented, Porous, Coated, Polymer/metal/polymer
Device Class Class 2 - Special Controls
CFR Regulation 21 CFR 888.3565
What this classification means

Class II devices require demonstration of substantial equivalence to a legally marketed predicate device. This pathway does not require clinical trials - it relies on engineering equivalence and performance data. Most Orthopedic devices follow this clearance model.

Regulatory Peers - MBH Prosthesis, Knee, Patello/femorotibial, Semi-constrained, Uncemented, Porous, Coated, Polymer/metal/polymer

All 141
Devices cleared under the same product code (MBH) and FDA review panel - the closest regulatory comparables to K232426.
Persona the Personalized Knee System (Persona Porous Plasma Spray PPS Femurs)
K253189 · Zimmer, Inc. · Mar 2026
GMK 3D Metal Tibial Tray Extension
K253328 · Medacta International S.A. · Feb 2026
Triathlon® Total Knee System - Triathlon® X3® Medial Stabilized Tibial Bearing Insert
K253637 · Howmedica Osteonics Corp., Dba Stryker Orthopaedics · Feb 2026
Active-V Total Knee System
K253239 · Signature Orthopaedics Pty, Ltd. · Dec 2025
Balanced Knee System TriMax Porous Femoral Components
K253161 · Ortho Development Corp. · Dec 2025
Freedom Metaphyseal Cone Implants (Metaphyseal Cones)
K252777 · Maxx Orthopedics, Inc. · Oct 2025