By Dr. Pulak Vatsya, MS Orthopaedics (PGIMER Chandigarh) | Knee Replacement Surgeon, StepUp Joints, Lajpat Nagar, New Delhi | Last Updated: March 2026
Quick Answer
Partial knee replacement (unicompartmental, or UKR) resurfaces only the damaged compartment of the knee, preserving healthy cartilage and ligaments offering faster recovery and a more natural-feeling knee. Total knee replacement replaces all three compartments and is needed when arthritis is widespread. Dr. Pulak Vatsya performs both at StepUp Joints, Lajpat Nagar. The right choice depends on how much of the knee is affected. When arthritis is limited to one side, partial knee replacement is often the better option but it requires precise patient selection.
The Core Difference
The difference is how much of the knee is replaced. Dr. Pulak Vatsya explains that partial knee replacement (UKR) addresses only the single damaged compartment – usually the inner (medial) side – while total knee replacement resurfaces the entire joint.
Because UKR preserves the healthy parts of the knee, including the ligaments, patients often report that the knee feels closer to natural. However, Dr. Pulak Vatsya notes that partial knee replacement requires strict patient selection – the wrong candidate leads to early failure. This is why experience matters.
Total vs Partial Knee Replacement: Side by Side
| Factor | Partial Knee (UKR) | Total Knee (TKR) |
| Compartments replaced | One |
All three
|
| Incision size | Smaller |
Larger
|
| Recovery speed | Faster |
Standard
|
| Hospital stay | 1 night typical |
2-3 nights
|
| Knee ‘feel’ | More natural |
Very good
|
| Ligaments preserved | Yes (ACL kept) |
Often removed
|
| Candidacy | Single-compartment only |
Widespread arthritis
|
| Future revision | Straightforward to TKR |
Complex revision
|
How Dr. Pulak Vatsya Decides
At StepUp Joints, Lajpat Nagar, Dr. Pulak Vatsya bases the total vs partial decision on imaging and examination not preference. Partial knee replacement is considered when:
-
Arthritis is confined to one compartment (usually medial)
-
The ACL is intact and functioning
-
Other compartments show healthy cartilage
-
The patient has reasonable alignment and range of motion
If arthritis affects multiple compartments, total knee replacement is the right choice. Dr. Pulak Vatsya is one of very few surgeons in South Delhi who routinely performs partial knee replacement many surgeons default to total replacement because UKR requires more precise selection and technique.
Frequently Asked Questions
Is partial knee replacement better than total?
For patients with single-compartment arthritis, partial knee replacement offers faster recovery and a more natural-feeling knee. But it is only suitable for select patients. Dr. Pulak Vatsya evaluates candidacy at StepUp Joints, Lajpat Nagar.
Can partial knee replacement be converted to total later?
Yes. Because UKR preserves bone stock, Dr. Pulak Vatsya can convert it to a total knee replacement in future if needed with the complexity of a primary, not a difficult revision.
Who does partial knee replacement in South Delhi?
Dr. Pulak Vatsya routinely performs unicompartmental (partial) knee replacement at StepUp Joints, Lajpat Nagar, New Delhi a procedure underperformed by most Delhi surgeons.
Consult Dr. Pulak Vatsya to find out if you qualify for partial knee replacement – StepUp Joints, Lajpat Nagar, New Delhi | stepupjoints.com | In-clinic ₹1,200 Teleconsult ₹1,000
