This systematic review of 21 studies (25,235 patients, 2010–2022) re-examines the widely cited 20% dissatisfaction rate after primary TKA. It identifies the true current rate and catalogs which sociodemographic, preoperative, and postoperative factors predict who ends up dissatisfied.
The number 20% has been repeated so often in TKA counseling that it became received wisdom — but this systematic review of 25,235 patients shows the real figure is closer to 10%, and drops to 7.3% when complications are excluded.
That still means roughly 100,000 dissatisfied patients per year in the U.S., so the problem is real. The point is that your counseling should be accurate, and your energy should go toward modifiable risk factors.
Before offering TKA, screen explicitly for three things: mild radiographic OA (Kellgren-Lawrence 1–2), active anxiety or depression, and pain catastrophizing. These are your highest-yield preoperative targets. Patients who match this profile are poor candidates without optimization, not just higher-risk ones.
Set expectations in writing. Unmet expectations are a consistent, preventable driver of dissatisfaction confirmed across studies with thousands of patients. A conversation about what TKA will and will not restore is protective for both the patient and you.
This systematic review of 21 studies (25,235 patients, 2010–2022) re-examines the widely cited 20% dissatisfaction rate after primary TKA. It identifies the true current rate and catalogs which sociodemographic, preoperative, and postoperative factors predict who ends up dissatisfied.
The number 20% has been repeated so often in TKA counseling that it became received wisdom — but this systematic review of 25,235 patients shows the real figure is closer to 10%, and drops to 7.3% when complications are excluded.
That still means roughly 100,000 dissatisfied patients per year in the U.S., so the problem is real. The point is that your counseling should be accurate, and your energy should go toward modifiable risk factors.
Before offering TKA, screen explicitly for three things: mild radiographic OA (Kellgren-Lawrence 1–2), active anxiety or depression, and pain catastrophizing. These are your highest-yield preoperative targets. Patients who match this profile are poor candidates without optimization, not just higher-risk ones.
Set expectations in writing. Unmet expectations are a consistent, preventable driver of dissatisfaction confirmed across studies with thousands of patients. A conversation about what TKA will and will not restore is protective for both the patient and you.