Cleared Traditional

RINGLOC CONSTRAINED LINERS (K021661) - FDA 510(k) Clearance

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

K021661 · Biomet Orthopedics, Inc. · Orthopedic device
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Oct 2002
Decision
158d
Days
Class 2
Risk

K021661 is an FDA 510(k) clearance for the RINGLOC CONSTRAINED LINERS. Classified as Prosthesis, Hip, Constrained, Cemented Or Uncemented, Metal/polymer (product code KWZ), Class II - Special Controls.

Submitted by Biomet Orthopedics, Inc. (Warsaw, US). The FDA issued a Cleared decision on October 25, 2002 after a review of 158 days - an extended review cycle.

This device falls under the Orthopedic FDA review panel, regulated under 21 CFR 888.3310 - 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 Biomet Orthopedics, Inc. devices

Submission Details

510(k) Number K021661 FDA.gov
FDA Decision Cleared Substantially Equivalent - Traditional 510(k) (SESE)
Date Received May 20, 2002
Decision Date October 25, 2002
Days to Decision 158 days
Submission Type Traditional
Review Panel Orthopedic (OR)
Summary Summary PDF
Third-party Review No - reviewed directly by FDA
Regulatory Context
Review time vs. panel average
36d slower than avg
Panel avg: 122d · This submission: 158d
Pathway characteristics
Predicate-based equivalence. No clinical trials required.

Device Classification

Product Code KWZ Prosthesis, Hip, Constrained, Cemented Or Uncemented, Metal/polymer
Device Class Class 2 - Special Controls
CFR Regulation 21 CFR 888.3310
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 - KWZ Prosthesis, Hip, Constrained, Cemented Or Uncemented, Metal/polymer

All 28
Devices cleared under the same product code (KWZ) and FDA review panel - the closest regulatory comparables to K021661.
FREEDOM CONSTRAINED LINERS
K030047 · Biomet, Inc. · Jan 2003
TRILOGY ACETABULAR SYSTEM CONSTRAINED LINER, MODEL 6154 SERIES
K021826 · Zimmer, Inc. · Dec 2002
REFLECTION CONSTRAINED LINER
K021803 · Smith & Nephew, Inc. · Dec 2002
RINGLOC CONSTRAINED LINERS II
K021728 · Biomet, Inc. · Oct 2002
RINGLOC CONSTRAINED LINER
K950202 · Biomet, Inc. · May 1995
OMNIFIT CONSTRAINED ACETABULAR BEARING INSERT
K890197 · Osteonics Corp. · Apr 1989