Knee Replacement Implants – Everything You Must Know Before Surgery – By Dr. Balaraju Naidu, Robotic Orthopedic Surgeon, ONUS Robotic Hospitals
Introduction
Chronic knee pain due to arthritis can severely limit mobility, independence, and quality of life. When conservative treatments fail, knee replacement surgery becomes a highly effective solution.
But one of the most common patient questions is:
“What implant will be used in my knee?”
Understanding knee replacement implants helps patients make informed, confident decisions before surgery.
What Is a Knee Replacement Implant?
A knee replacement implant is an artificial prosthesis designed to replace the damaged joint surfaces of the knee. It restores:
Smooth joint movement
Alignment
Stability
Pain-free function
Modern implants are engineered to replicate natural knee biomechanics as closely as possible.
What Are Knee Implants Made Of?
Knee implants are made from highly durable, biocompatible materials:
Titanium alloys – lightweight and strong
Cobalt-chromium alloys – wear-resistant
Medical-grade polyethylene (plastic spacer) – reduces friction
These materials are corrosion-resistant, long-lasting, and safe for long-term implantation.
Types of Knee Replacement Implants
1️⃣ Cemented Implants (Most Common)
Fixed to bone using surgical cement
Provides immediate stability
Suitable for most patients
2️⃣ Cementless Implants
Designed for bone to grow into implant surface
Preferred in younger patients with good bone quality
3️⃣ Customized / Patient-Specific Implants
Designed based on patient anatomy
Improves fit and biomechanics
Used in selected cases
The choice depends on:
Age
Bone quality
Activity level
Severity of deformity
Surgeon expertise
How Long Do Knee Implants Last?
With modern technology and correct surgical technique:
✅ 20–25 years longevity is common
✅ Robotic alignment improves durability
✅ Physiotherapy enhances implant survival
Implant longevity depends on:
Proper alignment
Weight control
Activity modification
Regular follow-up
Why Robotic Knee Replacement Improves Outcomes
Robotic systems enhance precision in:
Implant positioning
Joint balancing
Alignment accuracy
Ligament preservation
Benefits include:
✔ Reduced post-operative pain
✔ Faster recovery
✔ Better functional outcomes
✔ Improved implant longevity
Precision today means fewer complications tomorrow.
Risks of Poor Implant Selection
Improper implant selection or alignment can cause:
Persistent pain
Early loosening
Instability
Revision surgery
That is why implant choice should be individualized — not generic.
Recovery After Knee Replacement
Typical recovery timeline:
Hospital stay: 2–4 days
Walking with support: within 24–48 hours
Physiotherapy begins immediately
Normal daily activities: 4–6 weeks
Full recovery: 2–3 months
Final Advice
Knee replacement is not just about replacing a joint — it is about restoring life.
Always consult an experienced robotic joint replacement surgeon to determine:
Correct implant type
Best surgical approach
Long-term care plan
The right implant, placed accurately, makes all the difference.
For Appointments:
Dr. Balaraju Naidu, Robotic Orthopedic Surgeon
ONUS Robotic Hospitals – Hyderabad
👉 Button link: contact-us or book-appointment
