FDA PRODUCT CODE · CLASS II
HSX — Prosthesis, Knee, Femorotibial, Non-Constrained, Cemented, Metal/Polymer
What these counts are not
Clearance and recall counts are SPEQ’s aggregation of FDA’s own published records for the code. A recall count is a measure of history, not of a device’s safety, neither number is an FDA rating, and SPEQ is not affiliated with the FDA.
What this classification requires
Every statement below is FDA’s own classification record for this product code, quoted from the device classification field reference. The SPEQ reading beneath each one is SPEQ’s interpretation of what it means for the work, and is not FDA text.
510(K)
SPEQ READINGA premarket notification under 21 CFR Part 807 Subpart E is the route for this code. The submission argues substantial equivalence to a legally marketed predicate, so the engineering question is which predicate the design can actually be compared against, and the evidence question is what testing supports that comparison.
Class II (moderate to high risk): general controls and special controls
SPEQ READINGSpecial controls are the distinguishing feature: performance standards, guidance documents, patient registries or postmarket surveillance named for the device type. Find the special controls before designing the test plan — they usually name the tests.
Device is eligible for The Voluntary Malfunction Summary Reporting Program
SPEQ READINGMalfunctions for this code may be reported in periodic summary form rather than as individual MDRs under 21 CFR Part 803. Eligibility is a property of the product code; using it is a decision the manufacturer makes and must be able to justify.
Not exempt due to Good Manufacturing Practice (GMP)/Quality System
SPEQ READINGThe full Quality Management System Regulation (21 CFR 820, incorporating ISO 13485:2016) applies, and is what an FDA inspection of this device will be conducted against.
Device is implantable
SPEQ READINGImplant status raises the evidentiary bar on biocompatibility and on traceability from finished device back to material lot.
Device is not used for life sustaining purposes
SPEQ READINGNo life-sustaining designation attaches to this code.
Device is not a candidate for a third party review program
SPEQ READINGFDA reviews any premarket notification for this code directly.
21 CFR 888.3520 — Knee joint femorotibial metal/polymer non-constrained cemented prosthesis
The classification regulation for this product code, as published by the Office of the Federal Register. This is the regulation text itself — no SPEQ interpretation appears in it.
(a) Identification. A knee joint femorotibial metal/polymer non-constrained cemented prosthesis is a device intended to be implanted to replace part of a knee joint. The device limits minimally (less than normal anatomic constraints) translation in one or more planes. It has no linkage across-the-joint. This generic type of device includes prostheses that have a femoral condylar resurfacing component or components made of alloys, such as cobalt-chromium-molybdenum, and a tibial component or components made of ultra-high molecular weight polyethylene and are intended for use with bone cement (§ 888.3027).
(b) Classification. Class II.
Source: Electronic Code of Federal Regulations, Title 21. 21 CFR is a work of the United States Government and is in the public domain. SPEQ read this section on October 22, 2026. CFR is amended continuously, so verify against the source before acting on it: read 21 CFR 888.3520 on eCFR →
Recent clearances
Recent recalls
LDPE bag containing the implant adheres to the highly polished implant surface.
The low density polyethylene (LDPE) bag used to package implants adheres to the highly polished surface of the devices.
The firm has received complaints of the base plates breaking in situ. If a breakage occurs, the broken baseplate must be revised and/or changed. If left unrevised a broken base could lead to instability and premature wear of the construct.
The firm has received complaints of the base plates breaking in situ. If a breakage occurs, the broken baseplate must be revised and/or changed. If left unrevised a broken base could lead to instability and premature wear of the construct.
The firm has received complaints of the base plates breaking in situ. If a breakage occurs, the broken baseplate must be revised and/or changed. If left unrevised a broken base could lead to instability and premature wear of the construct.
The firm has received complaints of the base plates breaking in situ. If a breakage occurs, the broken baseplate must be revised and/or changed. If left unrevised a broken base could lead to instability and premature wear of the construct.
The firm has received complaints of the base plates breaking in situ. If a breakage occurs, the broken baseplate must be revised and/or changed. If left unrevised a broken base could lead to instability and premature wear of the construct.
The firm has received complaints of the base plates breaking in situ. If a breakage occurs, the broken baseplate must be revised and/or changed. If left unrevised a broken base could lead to instability and premature wear of the construct.
Source: FDA device classification, 510(k)/PMA, and recall datasets. Recall entries count distinct FDA recall numbers, so one recall event affecting several products appears as several entries. Browse every product code SPEQ tracks →