Partial Rotator Cuff Tear: Bone Marrow Stimulation Stem Cell Therapy

When patients with rotator cuff tear ask 'how big is my tear?', they often receive a percentage answer: '30% torn', '50% torn'. But this percentage, while not meaningless, is far less important than the specific pattern of the tear for treatment planning.

Tear percentage vs. tear pattern

A 50% articular-side tear at the footprint is a completely different injury from a 50% bursal-side tear mid-tendon, even though both are described as '50% tears'. The location determines which treatment will be effective, which structures need to be addressed, and what the prognosis is with and without treatment.

The critical zone — why rotator cuff tears are hard to heal

The rotator cuff has a zone approximately 1 cm from the bone attachment with inherently poor blood supply. This 'critical zone' is where most significant tears occur, and the poor vascularity means the body's natural healing capacity is limited there. Treatments that work by improving blood supply or delivering regenerative cells to this zone have the best chance of achieving structural healing.

How bone marrow stimulation works

Bone marrow stimulation creates micro-channels in the bone near the tear site. This allows mesenchymal stem cells and growth factors from the bone marrow to migrate into the tear zone, where they can differentiate into tenocytes and begin structural repair. The process mimics what happens naturally in well-vascularized tissue — but in the avascular critical zone.

• ✓Mobilizes autologous (your own) mesenchymal stem cells — no donor material needed
• ✓No foreign body reaction or rejection risk
• ✓Particularly effective for critical zone tears at the bone attachment
• ✓Can be combined with ligament regeneration injection for multiplied effect