Patient name
A.G.
OSSO Case Study · Regenerative Orthopaedics
Reconstruction was recommended. The native ACL was preserved instead.
A.G., 39, was advised to undergo ACL reconstruction after a twisting injury to his left knee. Assessment at OSSO found a partial tear with intact fibre continuity and no mechanical instability - a ligament that could be healed rather than replaced. One day-care regenerative procedure and sixteen weeks later, he was back to unrestricted activity with his own ACL.
- Weeks of treatment
- 16
- Surgeries required
- 0
- Pain, VAS
- 7 → 1–2
- Native ACL
- Preserved
Patient and presentation
Age at intake
39, male
Occupation
Profession - placeholderPlaceholder
Condition
Left knee partial anterior cruciate ligament tear without clinical instability. MRI demonstrated a partial ACL tear with preserved fibre continuity.
The Full Journey
Patient and presentation
- Problem treated
- Left knee pain following a recent twisting injury, affecting walking, exercise and recreational activities
- Prior recommendation
- ACL reconstruction
- How he found OSSO
- Referral source - placeholderPlaceholder
The OSSO protocol
ACL Preservation Protocol. Comprehensive assessment confirmed a partial ACL tear without mechanical instability, which made A.G. suitable for a regenerative joint preservation procedure rather than reconstruction. A combination of Hyaluronic Acid and high-dose Growth Factor Concentrate was administered intra-articularly.
Why the two are combined Hyaluronic Acid does two jobs at once. It provides immediate visco-supplementation to improve joint mechanics, and it acts as a biological scaffold - improving the retention and sustained activity of the Growth Factor Concentrate inside the joint, so the healing signal stays where the ligament needs it and intra-articular inflammation comes down.
Weeks 1–2 - Biological healing
Healing phase following the regenerative procedure, with reduction in pain and inflammation.
Weeks 3–6 - Mobility and loading
Improvement in mobility and return of functional loading through the knee.
Weeks 7–12 - Strength restoration
Progressive restoration of lower limb strength and knee function.
Weeks 13–16 - Unrestricted activity
Return to unrestricted daily activities with a stable knee and no clinical signs of instability.
Before treatment vs. week 16
At intake
- Pain (VAS)
- 7 / 10 following a twisting injury
- Ligament integrity
- Partial ACL tear with preserved fibre continuity on MRI
- Ligament examination
- Stable Lachman with Grade I laxity; negative pivot shift
- Joint effusion
- Mild
- Range of motion
- Pain at terminal flexion
- Lower limb strength
- Reduced
- Walking and stairs
- Difficulty with prolonged walking, stair climbing and recreation - due to pain rather than instability
- Giving way
- No mechanical instability at presentation
Week 16
- Pain (VAS)
- 1–2 / 10
- Ligament integrity
- Native ACL preserved; stable examination with no progression of laxity
- Ligament examination
- Stable, unchanged
- Joint effusion
- None
- Range of motion
- Full, pain-free range of motion
- Lower limb strength
- Improved
- Walking and stairs
- Unrestricted walking and stair climbing
- Giving way
- No episodes of giving way
The limitation here was pain, not instability - and that distinction is what made preservation the right call rather than reconstruction.
Treatments Used
Care team
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