Has knee pain or stiffness made it hard for you to walk, climb stairs, or enjoy your daily life? If so, you're not alone. Many people suffer from knee joint issues due to arthritis, injury, or just normal wear and tear over time. For some, medication and therapy might help, but for others, doctors suggest a more permanent solution — knee replacement surgery.
If your doctor has mentioned this, you’ve probably heard the term “knee implant.” But what exactly is a knee implant? How does it work? Is it safe? This guide will answer all your basic questions in a simple and friendly way.
Best Knee Replacement Surgeon
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Dr. (Prof) Anil Arora
Vice Chairman & Head of Department Orthopaedics & Joint Replacement Surgery, Max Super Speciality Hospital, Patparganj, Delhi Chairman & Chief Surgeon, Prof. Arora's Knee & Hip Surgery Clinics, NCR
Education & Training:
Hospital: Max Super Specialty Hospital
Clinic: Prof. Arora’s Knee & Hip Surgery Clinics, Delhi NCR
Experience: 33+ Years
- Commonwealth Academic Staff Fellowship in Primary, Complex & Revision Joint Replacement Surgery: Royal National Orthopaedic Hospital - Stanmore, London (UK)
- Professor at University College of Medical Sciences & GTB Hospital, New Delhi
- Assistant Professor at Dr SN Medical College & Mahatma Gandhi Hospital, Jodhpur
- Senior Resident at University College of Medical Sciences & GTB Hospital, New Delhi
Specialty: Orthopaedic Joint Replacement (Robotic Knee & Hip Replacement) Max Super Specialty Hospital
About: Prof. Arora, Guinness world record holder and Limca book of records holder, is a Senior Robotic Total Knee & Hip Replacement surgeon. He is an Internationally known figure in Orthopedics and joint replacement. He has been performing joint replacements since 1988, experience of more than 33 years and 12,000 Knee & Hip Replacement surgeries. Teaching in medical college and training Orthopedic surgeons has provided him with vast surgical and clinical experience and expertise. He has wide-ranging skills in knee and hip replacement surgeries. He is known for his sound clinical judgment and fine surgical skills. He was the first surgeon to start pinless computer navigated total knee replacements in north India. He is regularly performing primary, complex and revision (Robotic & pinless computer navigated) knee and hip replacement surgeries. He is also performing primary and revision elbow and shoulder replacements. He is the immediate past president of Delhi Orthopedic association.
What Is a Knee Replacement Implant?
A knee implant is a medical device used to replace damaged or worn-out parts of the knee joint.
These parts are usually affected by arthritis, injury, or age-related wear and tear.
Think of the implant as a new mechanical part that helps your knee move smoothly again.
During knee replacement surgery, your orthopedic surgeon will remove the damaged parts of the knee and replace them with artificial components made of metal, plastic, or ceramic.
Why Do People Need Knee Implants?
People usually need a knee replacement when the joint becomes so damaged that it affects their quality of life. Common reasons include:
When simple treatments like medication, physiotherapy, or lifestyle changes don’t work anymore, doctors may suggest knee replacement surgery with implants.
Parts of a Knee Implant: Explained Simply
Your knee has three major parts that may need replacing:
1. Thighbone (Femur)
The lower end of the thigh bone is capped with a metal component. It’s shaped to fit naturally and allows the knee to bend and move easily.
2. Shinbone (Tibia)
A metal tray is attached to the top of the shinbone. On top of this tray, a plastic insert is placed to act as a cushion, helping the bones glide smoothly.
3. Kneecap (Patella)
Sometimes, a plastic piece is added behind the kneecap. This helps it move better across the joint. Not every patient needs this, depending on the condition of the patella.
These components work together to provide smooth motion, reduce pain, and improve stability.
What Materials Are Used in Knee Implants?
Knee implants are made from strong, safe, and long-lasting materials:
These materials are biocompatible, which means your body accepts them without problems.
How Are Knee Implants Attached to the Bone?
There are three main ways doctors attach the implant to your bone:
1. Cemented Fixation
A special medical cement is used to hold the implant in place. This is the most common method and offers quick stability.
2. Cementless Fixation
Here, no cement is used. Instead, the implant is pressed tightly onto the bone, and your bone naturally grows into it over time.
3. Hybrid Fixation
This method uses both techniques: one part is cemented, while the other relies on bone growth.
Your doctor will choose the best method based on your age, bone strength, and lifestyle.
Types of Knee Implant Designs
Every knee is different. That’s why there are several designs available:
1. Posterior-Stabilized Implants
If your knee’s natural ligaments are damaged, this design helps provide stability.
2. Cruciate-Retaining Implants
If your ligaments are healthy, this design keeps them in place and works alongside them.
3. Fixed-Bearing Implants
The plastic cushion stays fixed while the metal part moves over it. Simple and widely used.
4. Mobile-Bearing Implants
The plastic part moves slightly, allowing more rotation and flexibility for active patients.
Your orthopedic surgeon will recommend the best option based on your knee's condition, activity level, and age.
How Long Do Knee Implants Last?
Knee implants can last 15 to 20 years, or even longer, depending on your lifestyle and activity level. Regular check-ups, maintaining a healthy weight, and avoiding high-impact activities can help them last longer.
Is Knee Replacement Safe?
Yes, knee replacement surgery is generally safe and effective. Thousands of patients undergo the procedure each year and get back to enjoying their lives with less pain and more freedom.
Of course, like any surgery, there are risks. These may include infection, blood clots, or stiffness—but with the right care and an experienced surgeon, most patients recover successfully.
Why Choose Dr. Anil Arora as Your Knee Replacement Surgeon?
1. Expertise and Specialization
Dr. Anil Arora is a leading orthopedic surgeon who specializes in joint replacement surgeries, particularly knees. His deep understanding of knee anatomy and modern surgical techniques allows him to choose the best implant and approach tailored to each patient. With his expertise, you can feel confident you’re in skilled hands.
2. Over 30 Years of Surgical Experience
Dr. Anil Arora brings decades of hands-on expertise to the operating table. He has successfully performed thousands of knee replacements, each tailored to the patient’s specific needs and lifestyle.
3. Advanced Techniques for Better Recovery
Dr. Arora is known for using the latest surgical techniques and high-quality implants, which means less pain, smaller scars, and faster recovery for patients. His approach focuses on getting you back on your feet with minimal discomfort.
4. Personalized Patient Care
What truly sets Dr. Arora apart is his compassionate, patient-first approach. He takes the time to understand your medical history, answer all your questions, and explain your treatment plan in simple terms. His team is also known for being friendly, supportive, and always available to guide you through the entire process.
5. High Patient Satisfaction
Many patients speak highly of Dr. Arora's care — not just because of their successful surgeries, but because of how comfortable and confident they felt throughout their journey. From the first consultation to post-surgery recovery, you're in safe hands.
6. International Recognition
Dr. Anil Arora is not only respected in India but also recognized globally for his contribution to joint replacement surgeries. He regularly trains other doctors and participates in global orthopedic conferences, keeping up with the latest innovations.
Final Thoughts
A knee replacement can be life-changing, especially when pain and stiffness are holding you back. By understanding how knee implants work and what to expect, you’ll feel more confident and prepared.
If you're considering surgery, speak with your doctor, ask questions, and explore your options. Remember, it's not just about replacing a joint—it’s about reclaiming your life.