Cleared Traditional

K253637 - Triathlon® Total Knee System - Triathlon® X3® Medial Stabilized Tibial Bearing Insert (FDA 510(k) Clearance)

Class II Orthopedic device cleared through predicate-based substantial equivalence - typically does not require clinical trials.

K253637 · Howmedica Osteonics Corp., Dba Stryker Orthopaedics · Orthopedic device
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Optimized for regulatory review, auditing and printing
Feb 2026
Decision
91d
Days
Class 2
Risk

K253637 is an FDA 510(k) clearance for the Triathlon® Total Knee System - Triathlon® X3® Medial Stabilized Tibial Bearin.... Classified as Prosthesis, Knee, Patello/femorotibial, Semi-constrained, Uncemented, Porous, Coated, Polymer/metal/polymer (product code MBH), Class II - Special Controls.

Submitted by Howmedica Osteonics Corp., Dba Stryker Orthopaedics (Mahwah, US). The FDA issued a Cleared decision on February 18, 2026 after a review of 91 days - within the typical 510(k) review window.

This device falls under the Orthopedic FDA review panel, regulated under 21 CFR 888.3565 - the FDA orthopedic device regulatory framework. The Traditional 510(k) pathway establishes clearance through substantial equivalence to a legally marketed predicate device, without requiring clinical trial data.

Device pattern: Standard predicate-based submission. Standard predicate reliance. This clearance follows a standard predicate-based equivalence path within the Orthopedic review framework, consistent with the majority of Class II 510(k) submissions.

View all Howmedica Osteonics Corp., Dba Stryker Orthopaedics devices

Submission Details

510(k) Number K253637 FDA.gov
FDA Decision Cleared Substantially Equivalent - Traditional 510(k) (SESE)
Date Received November 19, 2025
Decision Date February 18, 2026
Days to Decision 91 days
Submission Type Traditional
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
31d faster than avg
Panel avg: 122d · This submission: 91d
Pathway characteristics
Predicate-based equivalence. No clinical trials required.

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 K253637.
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K252777 · Maxx Orthopedics, Inc. · Oct 2025
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K252044 · Howmedica Osteonics Corp., Dba Stryker Orthopaedics · Oct 2025