The most important decision in knee surgery is often not whether to have surgery — it is what kind. For patients with knee arthritis, the choice between knee resurfacing and total knee replacement determines how much of your natural joint you keep, how quickly you recover, and what your options look like decades from now.
This article, written by Dr TS Gill, explains the clinical difference between the two approaches and why the precision of RoboLens FT3D makes compartmental resurfacing a reliable and superior option for patients who qualify.
Understanding the Two Options
Total Knee Replacement (TKR)
Total knee replacement removes all three compartments of the knee joint — the medial (inner), lateral (outer), and patellofemoral (kneecap) compartments — regardless of which are actually diseased. The bone ends are reshaped and replaced with metal components, with a plastic spacer between them.
TKR is the appropriate treatment when all three compartments are severely damaged. It is a well-established procedure with good long-term outcomes for end-stage arthritis.
The limitation: for patients whose arthritis is limited to one or two compartments, TKR removes healthy tissue that does not need to be removed. This is unnecessarily invasive and eliminates the possibility of less disruptive treatment.
Knee Resurfacing
Knee resurfacing — also called partial or unicompartmental knee replacement — addresses only the compartment or compartments affected by arthritis. The healthy portions of the knee are left completely untouched. The natural ligaments are preserved. The result is a knee that functions closer to its original anatomy.
Historically, the concern with partial procedures was accuracy: could the surgeon reliably position a compartmental implant with sufficient precision to last long term? This is where FT3D changes everything.
Why Conventional Partial Knee Had a Precision Problem
Early compartmental knee procedures were performed with conventional instruments — alignment guides, manual measurements, and the surgeon’s eye. The accuracy achievable was reasonable but imperfect. Slightly misaligned implants led to uneven load distribution, accelerated wear, and earlier revision than total replacements.
This gave partial procedures a reputation for being technically demanding and less predictable than total replacement — a reputation that caused many surgeons to default to total replacement even in patients who might have been suitable for a more conservative approach.
The problem was not the concept of compartmental resurfacing. The problem was the precision available to execute it reliably.
How FT3D Solves the Precision Problem
RoboLens FT3D maps the patient’s knee in real time during surgery, building a three-dimensional model from the actual bone surfaces and soft tissue tension as they exist under surgical conditions. This intraoperative data allows implant positioning to be planned and executed with sub-millimetre accuracy.
The clinical implications are significant:
- Implant alignment matches the individual patient’s anatomy, not an average template
- Soft tissue balance is optimised based on real intraoperative tension readings
- Bone removal is precisely limited to what is necessary — no more, no less
- Load distribution across the resurfaced compartment is verified on screen before the implant is placed
The precision that FT3D provides is what makes compartmental resurfacing a reliable, reproducible, long-term solution — not just for straightforward cases, but for patients with unusual anatomy, significant deformity, or complex arthritis patterns.
Head-to-Head: Resurfacing vs Total Replacement
| Factor | FT3D Resurfacing | Total Knee Replacement |
|---|---|---|
| Tissue removed | Damaged compartment only | All three compartments |
| Natural ligaments | Preserved | Partially sacrificed |
| Recovery time | Faster (less tissue disruption) | Longer recovery |
| Feel of knee | More natural | Mechanical feel |
| Suitable for | 1–2 compartment arthritis | All three compartments diseased |
| Future options | Revision to TKR possible | Revision TKR more complex |
| Cost (Chandigarh) | ₹2L – ₹3.5L | ₹3L – ₹5L+ |
| Younger patients | Strongly preferred | Risk of early revision |
The Younger Patient Problem
Total knee replacement implants have a finite lifespan — typically 15 to 20 years in good conditions. For a 45-year-old patient, this means almost certain revision surgery by their mid-60s. Revision TKR is significantly more complex than the first operation, with higher complication rates and longer recovery.
This is why younger patients with partial arthritis are precisely the group who benefit most from FT3D resurfacing. The procedure:
- Addresses their current pain and arthritis effectively
- Preserves bone stock for any future procedure
- Does not commit them to a revision cycle in their most active decades
- Provides a more natural-feeling knee that supports an active lifestyle
With FT3D precision, the concern about long-term durability of partial resurfacing is largely eliminated — proper implant alignment and balance, confirmed intraoperatively, is what drives implant longevity.
How to Know Which One Is Right for You
The answer is in your X-rays and clinical examination. If your arthritis is confined to one or two compartments with intact ligaments and reasonable bone quality, you are likely a strong candidate for FT3D resurfacing.
If your arthritis has destroyed all three compartments, or if your ligaments are severely compromised, total knee replacement is the appropriate option.
Dr TS Gill assesses this at the initial consultation. He will review your X-rays, examine your knee directly, and give you a clear clinical recommendation based on what your specific anatomy shows — not a preference for one procedure over another.
→ Full guide to RoboLens FT3D Knee Resurfacing
→ Book a Consultation with Dr TS Gill
Frequently Asked Questions
Is knee resurfacing better than total knee replacement?
For patients with arthritis limited to one or two compartments, knee resurfacing with FT3D is generally the better option — it preserves more natural tissue, enables faster recovery, and produces a more natural-feeling knee. For patients with end-stage arthritis across all three compartments, total knee replacement is the appropriate treatment.
How long does FT3D knee resurfacing last?
With correct patient selection and the precise implant positioning that FT3D provides, compartmental resurfacing implants can last 15 to 20 years or more. The key factors are correct patient selection and surgical precision — both of which FT3D addresses directly.
Can knee resurfacing be converted to total replacement later?
Yes. If arthritis progresses to other compartments in future years, FT3D resurfacing can be converted to total knee replacement. Because FT3D preserves maximum bone stock, this conversion is typically straightforward — the bone available for the total replacement is better than it would have been if TKR had been done at the first operation.
What is the minimum age for FT3D knee resurfacing?
There is no strict minimum age. Suitability is based on arthritis pattern and clinical presentation, not age. FT3D resurfacing is particularly well-suited for patients in their 40s and 50s who have early-to-moderate compartmental arthritis and want to preserve their natural joint as long as possible.