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Dr. Shubhang Aggarwal Senior Joint Replacement Surgeon

Partial Knee Replacement

Who Should and Who Should Not Get It

+91 98142 09405

A precise operation for a specific problem. Partial knee replacement is not a smaller version of total knee replacement—it is a different operation, meant only for patients with arthritis limited to one compartment of the knee.

25+ Years of Experience

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25000+ Surgeries

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Top Surgeon in India

Dr. Shubhang Aggarwal is one in the top 11 robotic surgeons in india.

Partial (Unicondylar) Knee Replacement

Department of Orthopaedics at NHS Hospital Jalandhar

When used in the right patient, partial knee replacement can provide:

  • Faster recovery – Get back on your feet sooner

  • Better knee function – Preserve natural movement

  • More natural movement – Maintain your knee's mechanics

When used in the wrong patient, it can fail early. This is why correct diagnosis and patient selection are more important than the technique itself.

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What Is Partial (Unicondylar) Knee Replacement?

In partial knee replacement:

  • Only the damaged compartment of the knee is replaced

  • The healthy cartilage, ligaments, and bone are preserved

  • The knee's natural mechanics are maintained

Unlike total knee replacement, the goal is restoration, not substitution.

The Academic Principle: Kinematic Balancing

A healthy knee does not move in a straight mechanical axis. It moves according to each person's natural anatomy and ligament balance—this is known as kinematic alignment and kinematic balancing.

What does kinematic balancing mean?

Instead of forcing the knee into a "standard" alignment, kinematic balancing aims to:

  • Respect the patient's original joint line

  • Preserve native ligament tension

  • Maintain physiological movement patterns

In partial knee replacement, this principle is especially important because:

  • Most of the knee remains untouched

  • The preserved ligaments continue to guide motion

  • The implant must work with the natural knee, not override it

When performed with proper kinematic principles, UKR often feels:

More Natural
More Stable
More Functional

Advantages of Partial (Unicondylar) Knee Replacement

When indicated correctly, partial knee replacement offers several well-established benefits

Minimally Invasive Surgery

Smaller incision, less muscle and soft tissue disruption, reduced blood loss.

Shorter Hospital Stay

Many patients are discharged earlier than with total knee replacement. Faster mobilisation.

Faster Recovery

Quicker return to walking, earlier resumption of routine activities, less post-operative stiffness.

Preservation of Natural Knee Feel

Cruciate ligaments are retained. Movement often feels more natural than a total knee replacement.

Fewer Activity Restrictions

Patients usually regain a higher level of confidence in daily movement. Squatting, stairs, and routine activities often feel easier than after total knee replacement (within medical guidance).

Important: These advantages are possible only when patient selection is correct.

Who Is a Good Candidate?

You may be suitable for partial knee replacement if:

  • Arthritis is confined to one compartment of the knee (most commonly the medial compartment)

  • Ligaments are intact and functional

  • Knee deformity is mild and correctable

  • You have good range of motion

  • Pain is localised to one side of the knee

In such patients, UKR can provide excellent long-term function when done properly.

Who Should NOT Have It?

Partial knee replacement is not appropriate if:

  • Arthritis affects multiple compartments

  • There is significant ligament instability

  • Severe deformity or stiffness is present

  • Inflammatory arthritis (e.g., rheumatoid arthritis) is the primary diagnosis

  • Knee pain is diffuse and not localised

In these situations, a total knee replacement or other treatment is more reliable.

Warning: Doing a partial knee in the wrong patient compromises outcomes.

Why Correct Diagnosis Matters More Than the Operation

Imaging alone does not decide treatment.

A proper decision requires:

  • Correlating X-rays and scans with clinical symptoms

  • Identifying the exact source of pain

  • Assessing ligament integrity and joint mechanics

Partial knee replacement demands precision in diagnosis, not just surgical skill. This is where experience and academic understanding matter most.

Role of Robotic Assistance in Partial Knee Replacement

Robotic systems can be particularly valuable in UKR because they help with:

  • Accurate bone preparation

  • Reproducing the planned joint line

  • Maintaining kinematic balance

  • Ensuring precise implant positioning

When used appropriately, robotics supports the principles of kinematic alignment, helping the surgeon execute the plan with greater consistency.

However, robotics does not replace decision-making. It refines execution after the correct surgical plan is established.

Partial vs Total Knee Replacement

A Thoughtful Choice

Partial knee replacement is not "better" than total knee replacement for everyone.

It is better only for the right patient.

The decision depends on:

  • Pattern of arthritis

  • Knee stability

  • Functional needs

  • Long-term expectations

A well-chosen total knee replacement will outperform a poorly chosen partial knee replacement.

Recovery and Rehabilitation

Because much of the knee is preserved:

  • Walking usually begins early

  • Physiotherapy progresses faster

  • Muscle strength returns sooner

  • Overall recovery is often smoother

However, structured rehabilitation remains essential.

A minimally invasive surgery still requires maximal commitment to recovery.

About the Surgeon

Dr. Shubhang Aggarwal

is a leading Robotic Knee Replacement Surgeon in India and is One of the Few Surgeons in the country. Only a handful of centres across the Asia Pacific have this revolutionary Robotic Cutting Edge Technology.

With an experience of more than 22+ years and more than 25000+ joint replacement surgeries under his belt, he is the first choice in this part of the country for such complex knee joint medical procedures.

He has advanced training in joint replacement from prestigious medical colleges and universities in the UK, France, Germany, Australia, and Singapore.

Final Thought

Partial knee replacement is a precise, elegant operation when used for the correct indication.

It offers:

  • Minimal invasiveness

  • Faster recovery

  • Preservation of natural knee function

  • Fewer activity restrictions

But its success depends entirely on:

  • Correct diagnosis

  • Proper patient selection

  • Kinematic understanding of the knee

  • Surgical experience

This is not a surgery to be offered routinely—it is a surgery to be offered responsibly.

Schedule a Consultation

If you have been advised knee replacement and want to know whether a partial knee replacement is appropriate in your case, a detailed clinical evaluation can clarify the best option.

The aim is not simply to operate, but to choose the right operation for the right knee.

Call +91 98142 09405

Frequently Asked Questions

Got questions? We've got answers.

How long does a partial knee replacement last?

When performed on appropriate patients, partial knee replacements can last 15-20 years or more. Success depends heavily on proper patient selection and surgical technique.

Is partial knee replacement less painful than total knee replacement?

Generally yes. Because less bone and soft tissue are affected, patients typically experience less postoperative pain and faster functional recovery.

Can I play sports after partial knee replacement?

Many patients return to low-impact activities like swimming, cycling, and walking. High-impact activities should be discussed with your surgeon based on your specific case.

What is the recovery time?

Most patients begin walking within 24-48 hours after surgery. Full recovery typically takes 6-12 weeks, compared to 3-6 months for total knee replacement.