A patient and clinician guide to total knee arthroplasty

Knee replacement, explained

What total knee replacement is, who it helps, how the surgery and recovery go, and an evidence-based look at implant designs, robotics and the companies that make them.

Front view of a knee joint with the three parts of a knee replacement: a metal femoral component, a plastic spacer and a metal tibial component femoral component plastic spacer tibial component thighbone shinbone
Schematic only. Implant shapes vary by design and manufacturer.

An independent, evidence-based guide for patients, families, clinicians and hospital value analysis teams. More than 700,000 knee replacements are done each year in the US. Every comparative claim here is tied to a published source. Start with the basics, or jump to the topic you need.

Understanding knee replacement

The basics: what the operation is, who it helps, and how it's done.

For patients and families

What to expect and how to prepare for recovery at home.

Implants, technology and evidence

Implant designs, robotics, the companies that make them, and what the research shows.

For hospitals, and reference

Purchasing considerations, helpful outside resources, definitions and every source we cite.

In-depth guides

Focused, sourced guides on recovery and on what the research says.

All guides