Knee Replacement Satisfaction Rates: What the National Data Shows and What It Means for Patients

The holidays bring the grandkids to your door, and they don’t come to sit still. They want you on the sledding hill, in the backyard football game, and down on the floor for one more round of hide-and-seek. A new knee can put you right back in the middle of it all.

Most people who choose knee replacement walk away thrilled with their results, and the ones who get the most out of it share a simple game plan: they prepare with purpose, set goals that matter to them, and stay committed through recovery. Here’s what the research tells us about knee replacement satisfaction, and how you can make this the season you keep up with everyone you love.

What the Research Says About Knee Replacement Satisfaction Rates

Knee replacement keeps getting better, and the latest numbers show it. A 2025 study in The Journal of Arthroplasty followed more than 1,700 patients who had surgery between 2018 and 2023. It found that nearly 90 percent were satisfied with their new knee, above the 80 percent figure that has been quoted for years.2 The researchers note that advances in implants, surgical technique, and care around surgery called for a fresh look at how patients are doing today.

Robotic-assisted surgery has produced some of the strongest results so far. In a 2025 study of 270 patients, 92.6 percent were satisfied or very satisfied with their robotic-assisted knee replacement one year after surgery.3 In Australia, a study of 165 patients at least a year after robotic knee replacement found that 95 percent were glad they had the operation, and 93 percent were happy with the outcome.4

Older research points the same way. A large systematic review of 208 studies, covering more than 95,000 patients, found that 83 percent of those studies reported satisfaction above 80 percent.1 The same review found that only 13 percent of the studies used a validated satisfaction survey, so results depend partly on how patients were asked. Across research methods and decades, though, most people who have a knee replaced are glad they did. Your own result will depend on your health, your goals, and your commitment to recovery, and a thorough evaluation with your surgeon is the best place to start.1

Why Some Knee Replacement Patients Are Less Than Satisfied

Researchers keep returning to the same themes. A large systematic review found that how well patients function after surgery is the most commonly reported predictor of satisfaction, while anxiety or depression before surgery is the most common pre-surgery predictor of dissatisfaction.1 Another review notes that patients are typically overly optimistic about expected outcomes, and unfulfilled expectations are a principal source of dissatisfaction.5

Timing matters too. Improvement continues for over 12 months, and some patients take as long as two years to fully recover. Someone who expects to feel perfect at week six may judge a normal recovery as a poor result. That is one reason same-day joint replacement, which gets appropriately selected patients home and moving quickly, works best alongside honest conversations about the longer road ahead.6

Does Robotic or Smart Technology Make Patients Happier?

Technology gets plenty of attention, so it is fair to ask. A meta-analysis of 17 studies found satisfaction of 95 percent after robotic-assisted knee replacement compared with 91 percent after conventional surgery, with no statistically significant difference. In plain terms,robotic-assisted knee replacement supports precise planning and implant positioning, but it is not a guarantee of a happier result.7

Other advances address recovery itself. Smart implant technology such as Persona IQ records movement data after surgery, so a surgeon can see how healing is progressing between visits. Implant choice also depends on the knee. Partial knee replacement may suit arthritis limited to one part of the joint, cementless knee replacement is an option for selected patients, and revision knee replacement addresses an earlier implant that is no longer working well.

How to Improve Your Odds of a Great Outcome

Satisfaction begins long before the operating room. Patients who have worked through nonsurgical knee treatments such as physical therapy, bracing, or anti-inflammatory medication understand what their knee can and cannot do, which makes the decision to proceed clearer. Good nutrition before and after surgery supports strength and healing. A frank discussion of goals, whether that is walking without pain, gardening, or finishing 18 holes of golf, helps align expectations with what a total knee replacement can realistically deliver.

Dr. Demetri Economedes’s knee replacement patients say it best. They praise his clear explanations, his patience, and the way he takes time to answer every question, and they come back for their second knee with zero hesitation. One patient who had both knees replaced by Dr. Economedes, including a particularly difficult one, shared a year later: “I have had my new knees for a year now and am very pleased and grateful to have such a knowledgeable surgeon. The knees are working beautifully!” Results like that are why so many patients walk out of recovery and straight back into the lives they love.

Frequently Asked Questions About Knee Replacement Satisfaction

What percentage of people are satisfied with their knee replacement?

Most are. Recent studies report satisfaction near 90 percent, and above 90 percent in some studies of robotic-assisted knee replacement.^2,3,4

What are the most common reasons for dissatisfaction after knee replacement?

Research points to how well the knee works and how much pain is relieved after surgery, along with unrealistic expectations. Anxiety or depression before surgery can also play a role. Discussing goals and recovery timelines before surgery can reduce the risk.^1,5

How long does it take to fully recover from a knee replacement?

Recovery is gradual. Improvement commonly continues for more than 12 months, and some patients take up to two years to feel fully recovered.⁶

Is robotic knee replacement better than traditional knee replacement?

Not necessarily when it comes to satisfaction. A meta-analysis found no statistically significant difference in patient satisfaction between robotic and conventional approaches. Robotic assistance is a planning and precision tool, and results still depend on patient selection, surgical skill, and rehabilitation.⁷

When should I consider knee replacement?

Consider it when arthritis pain continues to limit walking, sleep, or daily activities despite nonsurgical care such as therapy, bracing, medication, or injections. An orthopedic evaluation with imaging can confirm whether replacement or another option fits your knee.

Knee replacement works well for most people, and the best results come from informed decisions made with a surgeon who takes time to listen. If knee pain is shaping your days, you can request an appointment with Dr. Economedes to talk through your options and goals at your own pace.

Reference Links:

1. Patient Satisfaction After Total Knee Replacement: A Systematic Review - PubMed
2. Patient Satisfaction Is Nearly 90% After Total Knee Arthroplasty; We Are Better Than We Were - PubMed
3. High satisfaction and functional improvement following robotic-assisted total knee arthroplasty: A Latin American cohort study - PubMed
4. Is 80% satisfaction still the expectation in modern TKA mechanically aligned with robot assist? We think not - PMC
5. Establishing Realistic Patient Expectations Following Total Knee Arthroplasty. - Weill Cornell Medical College
6. Expectations After Knee Replacement - Proliance Orthopedic Associates
7. Robotic assisted Total Knee Arthroplasty (TKA) is not associated with increased patient satisfaction: a systematic review and meta-analysis - SpringerMedicine

AUTHOR: Dr. Demetri M. Economedes, D.O. - Hip & Knee Joint Replacement Specialist

Demetri M. Economedes, D.O. is a board-certified orthopedic surgeon specializing in hip and knee joint replacement. He practices at Cary Orthopaedics in Cary, North Carolina, where he treats patients throughout the Triangle area.

Credentials & Recognition

Dr. Economedes earned his undergraduate degree from Pennsylvania State University and his medical degree from the Philadelphia College of Osteopathic Medicine. He completed his internship at Mercy Suburban Hospital in East Norriton, Pennsylvania, and his residency through the Philadelphia College of Osteopathic Medicine Mednet program. Dr. Economedes went on to complete an Adult Joint Reconstruction Fellowship at Rush University in Chicago, a program recognized for training in complex hip and knee arthroplasty. He is certified by the American Osteopathic Board of Orthopaedic Surgery.

Clinical Expertise

Dr. Economedes focuses his practice on hip and knee replacement, including primary and revision joint reconstruction. His fellowship training in adult joint reconstruction at Rush University gives him specialized experience in restoring mobility for patients with advanced arthritis and joint degeneration. He works alongside a dedicated care team, including Chelsea Fletcher, PA-C, Courtney Shanahan, FNP, and Hunter Stuart, AT-C to guide patients through evaluation, surgery, and recovery.