ASTM F2083-21 PDF

Full title and description

ASTM F2083-21 — Standard Specification for Knee Replacement Prosthesis. This specification provides standardized, generic descriptions of knee replacement prostheses (total and unicondylar), including fixed and mobile bearing designs and components intended for use in primary and revision surgeries. It defines material and geometric characteristics considered important to in‑vivo performance while excluding detailed patellar resurfacing requirements (covered in other ASTM standards).

Abstract

F2083-21 sets out baseline requirements and descriptive classifications for knee replacement prostheses used to provide functioning articulation between femoral and tibial components. The specification addresses interchangeable modular components, cemented and uncemented uses, and performance‑relevant features (materials, basic geometry, constraint classifications and contact characteristics), but does not alone guarantee clinical performance.

General information

• Status: Withdrawn (December 2023).
• Publication date: 1 January 2021 (designation F2083-21).
• Publisher: ASTM International.
• ICS / categories: 11.040.40 — Implants for surgery, prosthetics and orthotics.
• Edition / version: F2083-21 (current designation at time of publication).
• Number of pages: 10 pages (published text).

Scope

The standard was written to cover the widely used generic types of knee replacement prostheses that provide functioning articulation — including total knee replacement (TKR) and unicondylar knee replacement (UKR) prostheses of fixed and mobile bearing varieties, and components intended for primary and revision procedures. It describes modular interchangeable components and components labeled for use with cement, and specifies basic material and geometric descriptions and characteristics important to in‑vivo performance. Hemiarthroplasty-only and certain custom or specialty devices are excluded.

Key topics and requirements

• Classification of knee prosthesis constraint (constrained, semi‑constrained, unrestricted) and design implications.
• Descriptions of materials and basic geometry required for components (femoral, tibial insert, modular interfaces).
• Coverage of fixed and mobile bearing designs and provisions for primary and revision implants.
• Reference to relevant test methods and companion standards for wear, fatigue and contact/pressure mapping (standards referenced within F2083).
• Explicit exclusions (patellar resurfacing details are covered under a separate ASTM specification).

Typical use and users

Manufacturers and design engineers use the specification when documenting design intent, material choices and basic prosthesis geometry. Test laboratories and quality teams use it to identify applicable test methods and descriptive requirements. Regulatory specialists and clinical affairs teams reference it when preparing device submissions or demonstrating conformance to recognized consensus standards. Orthopaedic researchers and clinicians may consult it for high‑level device classification and design attributes.

Related standards

F2083 is linked to several ASTM test methods and specifications referenced within the document (for example, standards covering patellar resurfacing, constraint test methods, wear and fatigue tests, and MRI marking practices). Regulatory recognition and cross‑references have appeared in standards recognition lists; users should consult ASTM and relevant regulatory lists for the current set of related/updated documents.

Keywords

knee replacement, total knee prosthesis, TKR, unicondylar knee replacement, UKR, femoral component, tibial insert, fixed bearing, mobile bearing, arthroplasty, constraint classification, implant materials, contact pressure, wear.

FAQ

Q: What is this standard?

A: ASTM F2083-21 is the ASTM International specification that provided generic descriptions and baseline requirements for knee replacement prostheses (total and unicondylar designs), their materials and key geometric/performance characteristics.

Q: What does it cover?

A: It covers description and classification of knee prostheses (femoral and tibial components, modular interchangeable parts), fixed and mobile bearings, primary and revision applications, and characteristics important to in‑vivo performance; it excludes detailed patellar resurfacing requirements and certain custom devices.

Q: Who typically uses it?

A: Device manufacturers, test laboratories, regulatory and clinical affairs teams, standards authors and orthopaedic researchers use the document for design descriptions, test selection and as a recognized consensus reference during regulatory submissions.

Q: Is it current or superseded?

A: F2083-21 was published in January 2021 and was listed as withdrawn in December 2023. Users should consult ASTM International and relevant regulatory recognition lists for the current accepted standard or any replacement guidance before relying on it for regulatory submissions or design validation.

Q: Is it part of a series?

A: F2083 is part of a suite of ASTM standards and test methods that cover orthopaedic implants and their testing (references inside F2083 point to related ASTM test methods and specifications for patellar resurfacing, wear/fatigue testing and MRI safety marking practices). It is typically used alongside those referenced standards.

Q: What are the key keywords?

A: Knee replacement, total knee prosthesis, unicondylar, TKR, UKR, femoral component, tibial insert, bearing (fixed/mobile), arthroplasty, implant materials, contact pressure, wear.