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Medically reviewed by Charles A. DeCook, MD ·

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Established care

Total knee replacement (TKA)

Replace damaged surfaces when the time is right.

01

What could it help with?

Knee replacement can substantially improve pain and daily function when arthritis remains disabling despite other care. A randomized trial found greater improvement than nonsurgical treatment, alongside more serious adverse events. [1][2]

02

Who might it suit?

For: Symptoms and joint damage that justify replacement after other care has failed.

Not for: An X-ray alone, without symptoms, examination, and a shared decision.

03

Limits and important cautions

Recovery takes work and improvement is not guaranteed. Infection, clots, stiffness, persistent pain, and revision belong in the surgical discussion.

What happens, how long, and what could it cost?
What happens
Specialist evaluation, imaging review, shared decision-making, and preparation for an operation.
When might I notice a change?
Recovery and rehabilitation take time; discuss milestones rather than a guaranteed recovery date.
How long might benefit last?
Long-term outcome and the chance of further surgery depend on the operation, implant, and patient.
Repeat treatment
Ask about routine follow-up and circumstances that could require revision or another operation.
Activity and recovery
Obtain individualized instructions for walking aids, wound care, work, driving, and rehabilitation.
Ask for a complete estimate
Surgeon, implant, hospital or facility, anesthesia, rehabilitation, and follow-up.

Use this as a consultation guide. A timeline is not a guarantee; the evidence and FDA sections below remain part of the decision.

Compare expectations side by side ↗

THE EVIDENCE IN CONTEXT

Established treatment when symptoms justify surgery

Read the 2 selected references
  1. Skou et al.: knee replacement versus nonsurgical care ↗Randomized trial · NEJM · 2015

    Replacement plus rehabilitation improved symptoms more at one year, with more serious adverse events. Participants were already eligible for replacement.

  2. ACR/AAHKS: timing of hip and knee replacement ↗Clinical guideline · 2023

    Applies to patients already indicated for replacement after unsuccessful nonsurgical care. It does not determine candidacy from an X-ray alone.

Editorial synthesis · reviewed September 19, 2026. These are selected decision-relevant references, not an exhaustive systematic review or a new formal evidence grade. FDA status and coverage are assessed separately.

FDA status

Exact implant must be verified

Approved or cleared implant systems exist. Your surgeon explains the exact device and risks.

Site summary of FDA information · reviewed September 19, 2026. Refer to current product labeling. This is not an FDA endorsement of this site.
What do professional guidelines say?

AAHKS: When moderate-to-severe symptoms remain after non-operative care and you have chosen an indicated replacement, ACR/AAHKS conditionally recommend proceeding without a required trial of more PT, anti-inflammatories, or injections. Medical optimization still matters.

ACR: When moderate-to-severe symptoms remain after non-operative care and you have chosen an indicated replacement, ACR/AAHKS conditionally recommend proceeding without a required trial of more PT, anti-inflammatories, or injections. Medical optimization still matters.

Will Medicare cover it?

Medicare pays when medically necessary and coverage requirements are met.

How we interpret changing evidence