Cleared Traditional

K243021 - Longboard Revision Hip Stem (FDA 510(k) Clearance)

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

K243021 · Signature Orthopaedics Pty, Ltd. · Orthopedic device
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Aug 2025
Decision
314d
Days
Class 2
Risk

K243021 is an FDA 510(k) clearance for the Longboard Revision Hip Stem. Classified as Prosthesis, Hip, Semi-constrained, Metal/ceramic/polymer, Cemented Or Non-porous, Uncemented (product code LZO), Class II - Special Controls.

Submitted by Signature Orthopaedics Pty, Ltd. (Lane Cove West, AU). The FDA issued a Cleared decision on August 7, 2025 after a review of 314 days - an unusually long review period, suggesting complex equivalence evaluation.

This device falls under the Orthopedic FDA review panel, regulated under 21 CFR 888.3353 - 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. Elevated predicate reliance profile. 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 Signature Orthopaedics Pty, Ltd. devices

Submission Details

510(k) Number K243021 FDA.gov
FDA Decision Cleared Substantially Equivalent - Traditional 510(k) (SESE)
Date Received September 27, 2024
Decision Date August 07, 2025
Days to Decision 314 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
192d slower than avg
Panel avg: 122d · This submission: 314d
Pathway characteristics
Predicate-based equivalence. No clinical trials required.

Device Classification

Product Code LZO Prosthesis, Hip, Semi-constrained, Metal/ceramic/polymer, Cemented Or Non-porous, Uncemented
Device Class Class 2 - Special Controls
CFR Regulation 21 CFR 888.3353
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 - LZO Prosthesis, Hip, Semi-constrained, Metal/ceramic/polymer, Cemented Or Non-porous, Uncemented

All 528
Devices cleared under the same product code (LZO) and FDA review panel - the closest regulatory comparables to K243021.
Avenir® Müller Stem
K260182 · Zimmer, Inc. · Apr 2026
implaFit® short stems
K252401 · Implantcast GmbH · Mar 2026
Libertas Taper Short (TS) Uncemented Femoral Stem (Libertas TS Stem)
K253171 · Maxx Orthopedics, Inc. · Jan 2026
Coated hip implants
K250450 · Medacta International S.A. · Sep 2025
Z1 Hip System
K251906 · Zimmer, Inc. · Jul 2025
RECLAIM Monobloc Revision Femoral Stem
K251292 · Depuy Ireland UC · May 2025