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Experience faster recovery,
Less pain, Early mobility
with
Quads Sparing
Knee Replacement
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Quadriceps Sparing (Subvastus) Knee Replacement
What is the Quads Sparing Approach?
The quadriceps sparing approach to total knee replacement is an advanced surgical technique that minimises tissue trauma and supports a faster, more comfortable recovery. Unlike traditional knee replacement methods that require cutting through the quadriceps tendon or muscle, this muscle-preserving procedure works beneath the vastus medialis muscle—hence the medical name subvastus approach. By avoiding damage to the quadriceps mechanism, patients often experience less pain, improved early mobility, and a quicker return to daily activities.
Key Benefits
- Less post-operative pain: Less disruption to muscle tissue leads to lower pain scores post-op.
- Improved early strength: Patients regain leg lift function more quickly.
- Faster return to walking and normal activity
- Shorter hospital stays or eligibility for short-stay surgery
- Reduced need for inpatient rehabilitation
- Improved patellar tracking with kinematic alignment
- Better functional outcomes
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Who Is It For?
The subvastus approach is ideal for:
- Patients undergoing primary total knee replacement
- Those with healthy BMI and flexible knees
- Active individuals aiming for a faster recovery
It may not be recommended for patients with severe deformity, very stiff joints, or in revision knee replacements.
How the Procedure Works
- Instead of cutting through the quadriceps tendon, the incision is made to the side of the large and strong vastus medialis (part of the quadriceps muscle)
- The vastus medialis muscle is elevated gently to access the joint.
- The joint is replaced using standard implants through the muscle-sparing window.
- The incision is closed with minimal soft tissue disruption.
This approach prioritises the preservation of strength and stability by maintaining the quadriceps tendon and muscle.
Subvastus vs Traditional Knee Replacement
| Feature | Subvastus | Traditional |
|---|---|---|
| Quadriceps tendon cut | No | Yes |
| Recovery speed | Faster | Slower |
| Leg lift on Day 1 | Likely | Delayed |
| Incision size | Same | Same |
| Best for revisions? | No | Yes |
Post-Operative Rehabilitation
- Day 0–1: Mobilisation with physiotherapist
- Day 2: Independent leg lifts, stair practice
- Week 1–2: Transition from walker to cane or unaided
- Week 4–6: Driving, light exercise
- Week 8–12: Full activity and strength training
Recovery is supported by a tailored rehabilitation plan focused on strength, motion and function.
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Why Choose a Quadriceps-Sparing Approach?
This muscle-preserving technique supports:
- Faster discharge from hospital
- Earlier return to walking and daily activities
- Less pain and swelling
- Improved early patient satisfaction
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FAQs
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[pane title=”Is the subvastus approach more painful?” background_image=””]
No. It is generally less painful due to reduced muscle trauma.
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[pane title=”Will I be able to walk sooner?” background_image=””]
Yes. Most patients walk with assistance within 24 hours and regain knee control rapidly.
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[pane title=”Is the prosthesis different?” background_image=””]
No. The implants are standard; only the surgical approach is different.
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More Information About Knee Replacements
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Further Information
- Learn more about minimally invasive knee replacement from the AAOS OrthoInfo
- See the clinical outcomes of quadriceps sparing techniques on PubMed
- Read how the Mayo Clinic describes recovery after knee surgery
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